(S) DSTBIM-3
J30-06935
INSTALLATION INSTRUCTIONS AND PARTS LIST
TUBULAR GAS FIRED DIRECT SPARK PROPELLER UNIT HEATERS
ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS
AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT THE POINT OF
INSTALLATION. RECORD THE UNIT MODEL AND SERIAL No.(s) IN THE SPACE PROVIDED. RETAIN FOR FUTURE
REFERENCE.
Model No.
Serial No.
FORYOUR SAFETY
The use and storage of gasoline or other flammable vapors and liquids in open containers in
the vicinity of this appliance is hazardous.
FORYOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4.Immediately contact your gas supplier.
Improper installation, adjustment, alteration, service, or maintenance
can cause property damage, injury, or death. Read the installation, operating, and
maintenance instruction thoroughly before installing or servicing this equipment.
APPROVED FOR USE IN CALIFORNIA
Install, operate, and maintain unit in accordance with the manufacturer's
instructions to avoid exposure to fuel substances, or substances from incomplete
combustion, which can cause death or serious illness. The state of California
has determined that these substances may cause cancer, birth defects, or other
reproductive harm.
INSTALLER'S RESPONSIBILITY
Installer Please Note: This equipment has been test fired and inspected. It has been
shipped free from defects from our factory. However, shipment and installation
problems such as loose wires, leaks, or loose fasteners may occur. It is the installer's
responsibility to inspect and correct any problem that may be found.
RECEIVING INSTRUCTIONS
Inspect shipment immediately when
received to determine if any damage
has occurred to the unit during
shipment. After the unit has been
uncrated, check for any visible
damage to the unit. If any damage
is found, the consignee should sign
the bill of lading indicating such
damage and immediately file claim
for damage with the transportation
company.
HVAC PRODUCTS
260 NORTH ELM ST., WESTFIELD, MA 01085
TEL: (413) 564-5540 FAX: (413) 562-5311
MODELS: TF-100, 125, 150, 175, 200, 250,
300, 350, 400 GF-150, 250, 400
Please utilize this toll free number to contact your local
representative 800-490-2290.
03/07
GENERAL SAFETY INFORMATION
Failure to comply with the general
Do not attempt to convert the
heater for use with a fuel other than the one
intended. Such conversion is dangerous, as it
will create the risks previously listed.
safety information may result in extensive
property damage, severe personal injury, or
death.
Make certain that the power source conforms to the
electrical requirements of the heater.
This product must be installed by
a licensed plumber or gas fitter when installed
within the Commonwealth of Massachusetts.
Do not depend upon a thermostat
or other switch as sole means of disconnecting
power when installing or servicing heater. Always
disconnect power at main circuit breaker as
described above. Failure to do so could result in
fatal electric shock.
Installation must be made in accordance with local
codes, or in absence of local codes, with the latest
edition of the ANSI Standard Z223.1 (N.F.P.A. No. 54)
National Fuel Gas Code. All of the ANSI and NFPA
Standards referred to in these installation instructions
are those that were applicable at the time the design
of this appliance was certified. The ANSI Standards
are available from CSA Information Services, 1-800-
463-6727. The NFPA Standards are available from the
National Fire Protection Association, Batterymarch Park,
Quincy, MA 02269. These unit heaters are designed for
use in airplane hangars when installed in accordance
with ANSI/NFPA No. 409, and in public garages when
installed in accordance with NFPA No. 88A and NFPA
No.88B.
Special attention must be given to any grounding
information pertaining to this heater.To prevent the risk of
electrocution, the heater must be securely and adequately
grounded. This should be accomplished by connecting
a ground conductor between the service panel and the
heater.To ensure a proper ground, the grounding means
must be tested by a qualified electrician.
Do not insert fingers or foreign objects into heater or its
air moving device. Do not block or tamper with the heater
in any manner while in operation, or just after it has been
turned off, as some parts may be hot enough to cause
injury.
If installed in Canada, the installation must conform with
local building codes, or in the absence of local building
codes, with CGA-B149.1 “Installation Codes for Natural
Gas Burning Appliances and Equipment” or CGA-B149.2
“Installation Codes for Propane Gas Burning Appliances
and Equipment.” These unit heaters have been designed
and certified to comply with CGA 2.6. Also see sections
on installation in AIRCRAFT HANGARS and PUBLIC
GARAGES.
This heater is intended for general heating applications
ONLY. It must NOT be used in potentially dangerous
locations such as flammable, explosive, chemical-laden,
or wet atmospheres.
Do not attach ductwork to this product or use it as a
makeup air heater. Such usage voids the warranty and
will create unsafe operation.
Do not alter the unit heater in any
way or damage to the unit and/or severe personal
injury or death may occur!
In cases in which property damage may result from
malfunction of the heater, a back-up system or
temperature sensitive alarm should be used.
Disconnect all power and gas
supplies before installing or servicing the heater.
If the power disconnect is out of sight, lock
it in the open position and tag it to prevent
unexpected application of power. Failure to do
so could result in fatal electric shock, or severe
personal injury.
The open end of piping systems being
purged shall not discharge into areas where there
are sources of ignition or into confined spaces
UNLESS precautions are taken as follows: (1) by
ventilation of the space, (2) control of the purging
rate, (3) elimination of all hazardous conditions. All
precautions must be taken to perform this operation
in a safe manner!
Ensure that all power sources conform
to the requirements of the unit heater, or damage to
the unit will result!
Unless otherwise specified, the following conversions
may be used for calculating SI unit measurements:
1 foot = 0.305 m
1 inch = 25.4 mm
1 gallon = 3.785 L
1 pound = 0.453 kg 1 litre/second = CFM x 0.472
1 psig = 6.894 kPa 1 meter/second = FPM ÷ 196.8
1 cubic foot = 0.028m3
Follow installation instructions CAREFULLY to avoid
creating unsafe conditions. All wiring should be done
and checked by a qualified electrician, using copper wire
only. All gas connections should be made and leak-tested
by a suitably qualified individual, per instructions in this
manual. Also follow procedures listed on “Gas Equipment
Start-Up Sheet” located in this manual.
1000 BTU/cu. ft. = 37.5 MJ/m3
1000 BTU per hour = 0.293 kW
1 inch water column = 0.249 kPa
Use only the fuel for which the heater is designed (see
rating plate). Using LP gas in a heater that requires
natural gas, or vice versa, will create risk of gas leaks,
carbon monoxide poisoning, and explosion.
3
Table 1 - Performance and Dimensional Data - Tubular Propeller Unit Heater
Unit Size
100
125
150
175
200
250
300
350
400
PERFORMANCE DATA†
Input - BTU/Hr.
(kW)
Output - BTU/Hr.
(kW)
Thermal Efficiency (%)
Free Air Delivery - CFM
(cu. m/s)
Air Temperature Rise - Deg. F
(Deg. C)
100,000
(29.3)
81,000
(23.7)
81
1,600
(0.756)
47
125,000
(36.6)
101,250
(29.6)
81
2,200
(1.039)
42
150,000
(43.9)
121,500
(35.6)
81
2,400
(1.133)
47
175,000
(51.2)
141,750
(41.5)
81
2,850
(1.346)
46
200,000
(58.6)
162,000
(47.5)
81
3,200
(1.511)
47
250,000
(73.2)
202,500
(59.3)
81
3,450
(1.629)
54
300,000
(87.8)
243,000
(71.2)
81
5,000
(2.361)
45
350,000
(102.5)
283,500
(83.0)
81
5,600
(2.644)
47
400,000
(117.1)
324,000
(95.0)
81
5,800
(2.738)
51
(26)
(23)
(26)
(26)
(26)
(30)
(24)
(26)
(28)
Full Load Amps at 120V
5.3
5.8
5.8
8.0
8.0
8.0
11.3
13.5
13.5
MOTOR DATA: Motor HP (Qty.) 1/10
1/4
1/4
1/3
1/3
1/3
(2) 1/4
(0.19)
PSC
1,140
9.4
(2) 1/3
(0.25)
PSC
1,140
11.6
(2) 1/3
(0.25)
PSC
1,140
11.6
Motor kW
Motor Type
R.P.M.
(0.080)
SP
1,050
4.2
(0.19)
PSC
1,140
4.7
(0.19)
PSC
1,140
4.7
(0.25)
PSC
1,140
5.8
(0.25)
PSC
1,140
5.8
(0.25)
PSC
1,140
5.8
Amps @ 115V
DIMENSIONAL DATA - inches (mm)
“A” Overall Height to Top of Flue 33-3/4
(857)
33-3/4
(857)
20-3/4
(527)
13-3/8
(340)
11
(279)
18-5/8
(473)
18-3/4
(476)
4-3/4
(121)
24-1/2
(622)
25-1/4
(641)
5
33-3/4
(857)
20-3/4
(527)
13-3/8
(340)
11
(279)
18-5/8
(473)
18-3/4
(476)
4-3/4
(121)
24-1/2
(622)
25-1/4
(641)
5
33-3/4
(857)
32-3/4
(831)
19-3/8
(492)
11
(279)
30-5/8
(778)
30-3/4
(781)
4-3/4
(121)
24-1/2
(622)
37-1/4
(946)
5
33-3/4
(857)
32-3/4
(831)
19-3/8
(492)
11
(279)
30-5/8
(778)
30-3/4
(781)
4-3/4
(121)
24-1/2
(622)
37-1/4
(946)
5
33-3/4
(857)
32-3/4
(831)
19-3/8
(492)
11
(279)
30-5/8
(778)
30-3/4
(781)
4-3/4
(121)
24-1/2
(622)
37-1/4
(946)
5
34
(864)
50-3/4
(1289)
28-3/8
(721)
12-1/4
(311)
48-5/8
(1235)
48-3/4
(1238)
5-1/8
(130)
24-1/2
(622)
55-1/4
(1403)
6
34
(864)
50-3/4
(1289)
28-3/8
(721)
12-1/4
(311)
48-5/8
(1235)
48-3/4
(1238)
5-1/8
(130)
24-1/2
(622)
55-1/4
(1403)
6
34
(864)
50-3/4
(1289)
28-3/8
(721)
12-1/4
(311)
48-5/8
(1235)
48-3/4
(1238)
5-1/8
(130)
24-1/2
(622)
55-1/4
(1403)
6
“B” Jacket Width of Unit
20-3/4
(527)
13-3/8
(340)
11
(279)
18-5/8
(473)
18-3/4
(476)
4-3/4
(121)
24-1/2
(622)
25-1/4
(641)
5
“C” Width to CL Flue
“D” Depth to Rear of Housing
“E” Hanging Distance Width
“F” Discharge Opening Width
“G” Depth to CL Flue
“H” Discharge Opening Height
“L” Overall Unit Width
*Flue Size Diameter - in.
(Dia.-mm)
Fan Diameter - in. (Qty.)
Gas Inlet-Natural Gas (in.)
Gas Inlet- LP Gas (in.)
Approximate Unit Weight - lbs.
(127)
16
(127)
16
1/2
1/2
145
(127)
16
1/2
1/2
155
(127)
18
1/2
1/2
191
(127)
18
1/2
1/2
201
(127)
18
3/4
1/2 OR 3/4
211
(152)
(2) 16
3/4
1/2 OR 3/4
307
(152)
(2) 18
3/4
1/2 OR 3/4
321
(152)
(2) 18
3/4
1/2 OR 3/4
335
1/2
1/2
133
(kg)
(60)
173
(78)
(66)
185
(84)
(70)
195
(88)
(87)
241
(109)
(91)
251
(114)
(96)
261
(118)
(139)
367
(166)
(145)
381
(173)
(152)
395
(179)
Approximate Ship Weight - lbs.
(kg)
* For all installations, the flue collar is included with the unit and should be field installed per the instructions included with the unit.
†
Ratings shown are for unit installations at elevations between 0 and 2,000 ft (0 to 610m). For unit installations in U.S.A. above 2,000 ft. (610m), the unit input must be derated 4% for each 1,000 ft. (305m) above sea level; refer to
local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54).
For installations in Canada, any reference to deration at altitudes in excess of 2,000 ft. (610m) are to be ignored. At altitudes of 2,000 ft. to 4,500 ft. (610 to 1372m), the unit must be derated to 90% of the normal altitude rating,
and be so marked in accordance with the ETL certification.
1-3/8"
(35)
(Hanging)
32-1/2"
(826)
E
L
D
(Hanging)
11-5/8"
(295)
(Hanging)
Flue
*
G
B
C
H
A
(Discharge
Opening)
33"
Electrical Control Panel
1" (25)
F
Gas Valve
(Discharge Opening)
Rear View
Side View
Front View
D4617
DIMENSIONS .XXX STANDARD UNITS
DIMENSIONS IN PARENTHESIS (XXX) MILLIMETERS
Figure 2 - Dimensional Drawing – Tubular Propeller Unit Heater
4
INSTALLATION
In Canada, installation must be in accordance to the
latest edition of CGA B149 “Installation Codes for Gas
Burning Appliances and Equipment.”
Do not install unit heaters in
corrosive or flammable atmospheres! Premature
failure of, or severe damage to the unit will
result!
AIR DISTRIBUTION: Direct air towards areas of
maximum heat loss. When multiple heaters are involved,
circulation of air around the perimeter is recommended
where heated air flows along exposed walls. Satisfactory
results can also be obtained where multiple heaters are
located toward the center of the area with heated air
directed toward the outside walls. Be careful to avoid all
obstacles and obstructions which could impede the warm
air distribution patterns.
Avoid locations where extreme
drafts can affect burner operation. Unit heaters
must not be installed in locations where air for
combustion would contain chlorinated, halo-
genated or acidic vapors. If located in such an
environment, premature failure of the unit will
occur!
Since the unit is equipped with an automatic gas ignition
system, the unit heater must be installed such that the
gas ignition control system is not directly exposed to
water spray, rain or dripping water.
Unit heaters should not be installed to maintain low
temperatures and/or freeze protection of buildings.
A minimum of 50°F (10°C) thermostat setting must
be maintained. If unit heaters are operated to maintain
lower than 50°F (10°C), hot flue gases are cooled
inside the heat exchanger to a point where water
vapor (a flue gas by-product) condenses onto the heat
exchanger walls. The result is a mildly corrosive acid that
prematurely corrodes the aluminized heat exchanger and
can actually drip water down from the unit heater onto
floor surface. Additional unit heaters should be installed
if a minimum 50°F (10°C) thermostat setting cannot be
maintained.
NOTICE: Location of unit heaters is related directly to
the selection of sizes. Basic rules are as follows:
MOUNTING HEIGHT: Unit Heaters equipped with
standard fan guards must be installed at a minimum of
8 feet (2.4m) above the floor, measured to the bottom of
the unit. At heights above 8 feet (2.4m), less efficient air
distribution will result. If a unit is to be mounted below
8 feet (2.4m) from the floor, an OSHA approved fan
guard is required on the unit.
AIR FOR COMBUSTION: The unit heater shall be
installed in a location in which the facilities for
ventilation permit satisfactory combustion of gas,
proper venting, and the maintenance of ambient
air at safe limits under normal conditions of use.
The unit heater shall be located in such a manner as
not to interfere with proper circulation of air within the
confined space. When buildings are so tight that normal
infiltration does not meet air requirements, outside air
shall be introduced per Sections 1.3.4.2 and 1.3.4.3 of
ANSI Z223.1 for combustion requirements. A permanent
opening or openings having a total free area of not less
than one square inch per 5,000 BTU/Hr (1.5 kW) of total
input rating of all appliances within the space shall be
provided.
AIRCRAFT HANGARS: Unit Heaters must be installed
in aircraft hangars as follows: In aircraft hangars, unit
heaters must be at least 10 feet (3.0m) above the upper
surface of wings or engine enclosures of the highest
aircraft to be stored in the hangar, and 8 feet (2.4m)
above the floor in shops, offices and other sections of
the hangar where aircraft are not stored or housed.
Refer to current ANSI/NFPA No. 409, Aircraft Hangars. In
Canada, installation is suitable in aircraft hangars when
acceptable to the enforcing authorities.
PUBLIC GARAGES: In repair garages, unit heaters must
be located at least 8 feet (2.4m) above the floor. Refer to
the latest edition of NFPA 88B, Repair Garages.
NOTICE: Unit Heater sizing should be based on heat
loss calculations where the unit heater output equals
or exceeds heat loss.
In parking structures, unit heaters must be installed so
that the burner flames are located a minimum of 18 in.
(457mm) above the floor or protected by a partition not
less than 18 in. (457mm) high. However, any unit heater
mounted in a parking structure less than 8 ft.(2.4m) above
the floor must be equipped with an OSHA approved fan
guard. Refer to the latest edition of NFPA 88A, Parking
structures.
5
INSTALLATION (continued)
CLEARANCES: Each Gas Unit Heater shall be Figure 3A
located with respect to building construction and other
equipment so as to permit access to the Unit Heater.
Clearance between vertical walls and the vertical
sides of the Unit Heater shall be no less than 6 inches
(152mm). However, to ensure access to the control box,
a minimum of 18" (457mm) is required for the control
box side. A minimum clearance of 6 inches (152mm)
must be maintained between the top of the Unit Heater
and the ceiling. The bottom of the Unit Heater must be
no less than 12 inches (305mm) from any combustible.
The distance between the flue collector and any
combustible must be no less than 6 inches (152mm).
Also see AIR FOR COMBUSTION and VENTING
sections.
NOTICE: Increasing the clearance distances may
be necessary if there is a possibility of distortion or
discoloration of adjacent materials.
Make certain that the lifting
methods used to lift the heater and the method
of suspension used in the field installation of the
heater are capable of uniformly supporting the
weight of the heater at all times. Failure to heed
this warning may result in property damage or
personal injury!
Figure 3B - Heater Mounting*
Make sure that the structure
to which the unit heater is to be mounted is
capable of safely supporting its weight. Under
no circumstances must the gas lines, the venting
system or the electrical conduit be used to
support the heater; or should any other objects
(i.e. ladder, person) lean against the heater gas
lines, venting system or the electrical conduit
for support. Failure to heed these warnings may
result in property damage, personal injury, or
death.
*All hanging hardware and wood is not included with the unit (To
be field supplied).
Figure 3C
Unit Heaters must be hung level
from side to side and from front to back, see Figure
3A, 3B and 3C. Failure to do so will result in poor
performance and/or premature failure of the unit.
Ensure that all hardware used in
the suspension of each unit heater is more than
adequate for the job. Failure to do so may result
in extensive property damage, severe personal
injury, or death!
Refer to Figures 3A, 3B and 3C for suspension of units.
6
GAS PIPING
To avoid damage or possible personal injury, do not connect gas piping to this unit
until a supply line pressure/leak test has been completed. Connecting the unit before completing the
pressure/leak test may damage the unit gas valve and result in a fire hazard.
Do not rely on a shut-off valve to isolate the unit while conducting gas pressure/leak
tests.These valves may not be completely shut off, exposing the gas valve to excessive pressure and
damage.
PIPE SIZING
NOTICE: If more than one unit heater is to be served
To provide adequate gas pressure to the gas unit heater, by the same piping arrangement, the total cu. ft./hr.
size the gas piping as follows:
input and length of pipe must be considered.
1. Find the cu. ft./hr. by using the following formula:
NOTICE: If the gas unit heater is to be fired with LP
gas, consult your local LP gas dealer for pipe size
information.
Input BTU/Hr.
Cu. ft./hr. =
1000
2. Refer to Table 3. Match “Length of Pipe in Feet”
with appropriate “Gas Input - Cu. Ft./Hr.” figure. This
figure can then be matched to the pipe size at the
top of the column.
NOTICE: HEATER INSTALLATION FOR USE WITH
PROPANE (BOTTLED) GAS MUST BE MADE BY
A QUALIFIED L.P. GAS DEALER OR INSTALLER.
HE/SHE WILL INSURE THAT PROPER JOINT
COMPOUNDS ARE USED FOR MAKING PIPE
CONNECTIONS; THAT AIR IS PURGED FROM
LINES; THAT A THOROUGH TEST IS MADE FOR
LEAKS BEFORE OPERATING THE HEATER; AND
THAT IT IS PROPERLY CONNECTED TO THE
PROPANE GAS SUPPLY SYSTEM.
Example:
It is determined that a 67 foot (20.4m) run of gas
pipe is required to connect a 200 MBTU gas unit
heater to a 1,000 BTU/cu ft. (0.29kW) natural gas
supply.
200,000 BTU/Hr
1,000 BTU/cu. ft.
= 200 Cu. ft./hr.
Using Table 3, a 1 inch pipe is needed.
Before any connection is made to the existing line
supplying other gas appliances, contact the local gas
company to make sure that the existing line is of adequate
size to handle the combined load.
NOTE: See General Safety Information section for
English/Metric unit conversion factors.
Table 3 - Gas Pipe Size
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters per Hour) for Gas Pressures of 0.5 psig (3.5 kPa) or Less,
and a Pressure Drop of 0.5 Inch Water Column (124.4 Pa)
(Based on a 0.60 Specific Gravity Gas)
Nominal
Iron
Internal
Dia.
Length of Pipe, Feet (meters)
Pipe Size
in.
10
20
30
(9.1)
97
40
(12.2) (15.2) (18.3) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0)
82 73 66 61 57 53 50 44 40 37 35
50
60
70
80
90
100
125
150
175
200
in.
0.622
(3.0)
175
(6.1)
120
1/2
(4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99)
360 250 200 170 151 138 125 118 110 103 93 84 77 72
(10.2) (7.08) (5.66) (4.81) (4.28) (3.91) (3.54) (3.34) (3.11) (2.92) (2.63) (2.38) (2.18) (2.04)
680 465 375 320 285 260 240 220 205 195 175 160 145 135
(19.3) (13.2) (10.6) (9.06) (8.07) (7.36) (6.80) (6.23) (5.80) (5.52) (4.96) (4.53) (4.11) (3.82)
1400 950 770 660 580 530 490 460 430 400 360 325 300 280
(39.6) (26.9) (21.8) (18.7) (16.4) (15.0) (13.9) (13.0) (12.2) (11.3) (10.2) (9.20) (8.50) (7.93)
2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430
(59.5) (41.3) (33.4) (28.0) (25.5) (22.9) (21.2) (19.5) (18.4) (17.6) (15.6) (14.2) (13.0) (12.2)
3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800
(112) (77.9) (62.3) (53.8) (47.6) (43.0) (39.6) (36.8) (34.5) (32.6) (28.9) (26.9) (24.1) (22.7)
3/4
1
0.824
1.049
1.380
1.610
2.067
2.469
1 1/4
1 1/2
2
2 1/2
3
6300
(178)
4350
3520
3000
2650
2400
2250
2050
1950
1850
1650
1500
1370
1280
(123) (99.7) (85.0) (75.0) (68.0) (63.7) (58.0) (55.2) (52.4) (46.7) (42.5) (38.8) (36.2)
3.068 11000 7700
(311) (218)
4.026 23000 15800 12800 10900 9700
(651) (447) (362) (309) (275)
6250
(177)
5300
(150)
4750
(135)
4300
(122)
8800
(249)
3900
(110)
8100
(229)
3700
(105) (97.7) (92.0) (83.5) (75.0) (69.4) (64.6)
3450
3250
2950
2650
2450
2280
4
7500
(212)
7200
(204)
6700
(190)
6000
(170)
5500
(156)
5000
(142)
4600
(130)
1. Determine the required Cu. Ft./Hr. by dividing the input by 1000. For SI/Metric measurements: Convert BTU/Hr. to kilowatts. Multiply the units
inputs (kW) by 0.0965 to determine Cu. Meters./Hr. 2. FOR NATURAL GAS: Select pipe size directly from the table. 3. FOR PROPANE GAS:
Multiply the Cu. Ft./Hr. value by 0.633; then, use the table. 4. Refer to the metric conversion factors listed in the General Safety section for SI Unit
measurement conversions.
7
PIPE INSTALLATION
1. Install the gas piping in accordance with applicable Figure 4 - Pipe Installation, Standard Controls
local codes.
2. Check gas supply pressure. Each unit heater must
be connected to a manifold pressure and a gas
supply capable of supplying its full rated capacity
as specified in Table 4. A field LP tank regulator
must be used to limit the supply pressure to a
maximum of 14 in. W.C. (3.5 kPa). All piping should
be sized in accordance with the latest edition of
ANSI Standard Z223.1, National Fuel Gas Code;
in Canada, according to CGA B149. See Tables
1 & 3 for correct gas piping size. If gas pressure
is excessive on natural gas applications, install a
pressure regulating valve in the line upstream from
the main shutoff valve.
3. Adequately support the piping to prevent strain on
the gas manifold and controls.
4. To prevent the mixing of moisture with gas, run the
take-off piping from the top, or side, of the main.
5. Standard Unit Heaters, optional two-stage units are
supplied with a combination valve which includes:
a. Manual "A" valve
Never use an open flame to detect
gas leaks. Explosive conditions may exist which
may result in personal injury or death!
b. Manual "B" valve
c. Solenoid valve
d. Pressure regulator
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during
Pipe directly into the combination valve (see Figure any pressure testing of that system in excess of 1/2 psig
4).
(3.5 kPa).
6. Gas valve has a pressure test post requiring a
3/32" hex head wrench to read gas supply and The appliance must be isolated from the gas supply
manifold pressures. Open 1/4 turn counterclockwise piping system by closing its individual manual shutoff
to read, turn clockwise to close and reseat. A 5/16" valve during any pressure testing of the gas supply
ID hose fits the pressure post.
piping system at test pressures equal to or less than
7. Provide a drip leg in the gas piping near the gas 1/2 psig (3.5 kPa).
unit heater. A ground joint union and a manual gas
shutoff valve should be installed ahead of the unit
heater controls to permit servicing. The manual
shutoff valve must be located external to the jacket
(See Figure 4).
Table 4 - Gas Piping Requirements
SINGLE STAGE GAS PIPING REQUIREMENTS*
GasType
Natural Gas
Propane (LP) Gas
Manifold
Pressure
3.5 in. W.C.
(0.9 kPa)
10.0 in. W.C.
(2.5 kPa)
8. Make certain that all connections have been
adequately doped and tightened.
14.0 in. W.C. Max.
(3.5 kPa)
14.0 in. W.C. Max.
(3.5 kPa)
Supply Inlet
Pressure
Do not over tighten the inlet gas
piping into the valve. This may cause stresses that
will crack the valve!
5.0 in. W.C. Min.
(1.2 kPa)
11.0 in W.C. Min.
(2.7 kPa)
*For single stage application only at normal altitudes.
NOTICE: Use pipe joint sealant resistant to the
action of liquefied petroleum gases regardless of
gas conducted.
Check all pipe joints for leakage
using a soap solution or other approved method.
Never use an open flame or severe personal
injury or death may occur!
8
ELECTRICAL CONNECTIONS
Figure 5a -
Low-voltage T
Thermostat Wiring
Single Stage
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
Figure 5b -
Low-voltage
Thermostat Wiring
Two Stage
disconnect power before
servicing can cause severe
personal injury or death.
Standard units are shipped for use on 115 volt, 60 hertz,
single phase electric power. The motor name-plate and
electrical rating of the transformer should be checked
before energizing the unit heater electrical system. All
external wiring must conform to the latest edition of
ANSI/NFPA No. 70, United States National Electrical
Code, and applicable local codes; in Canada, to the
Canadian Electrical Code, Part 1, CSA Standard C22.1.
Honeywell
T834H-1009
or
T834H-1017
Thermostat
Figure 5c -
T834H-1009 or
T834H-1017
W
R
G
Thermostat Wiring
R
G
W1 W2
D6922B
Do not use any tools (i.e. screwdriver,
pliers, etc.) across terminals to check for power. Use
a voltmeter.
THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS:
The initial heat anticipator setpoint should equal the
thermostat's current amperage draw when the unit is
firing. This setpoint should be measured for the best
results. Use the recommended ranges for a guide. If
further information is needed, consult your thermostat
manufacturer's instructions.
It is recommended that the electrical power supply to
each unit heater be provided by a separate, fused, and
permanently live electrical circuit. A disconnect switch of
suitable electrical rating should be located as close to
the gas valve and controls as possible. Each unit heater
must be electrically grounded in accordance with the
latest edition of the United States National Electrical
Code, ANSI/NFPA No. 70, or CSA Standard C22.1. Refer
to Figures 5a, 5b, 5c, 5d and 5e.
Recommended heat anticipator settings:
Unit Size:
30 thru 200
250 thru 400
For Tubular Units:
0.35 Amps
0.65 Amps
THERMOSTAT WIRING AND LOCATION:
NOTICE: The start-up fan delay should not exceed
30 seconds from a cold start.
NOTICE: The thermostat must be mounted on a
vertical, vibration-free surface, free from air currents,
and in accordance with the furnished instructions.
IMPORTANT: For all wiring connections, refer to the
wiring diagram shipped with your unit (either affixed
to the side jacket or enclosed in the installation
instructions envelope). Should any original wire
supplied with the heater have to be replaced, it
must be replaced with wiring material having a
temperature rating of at least 105° C.
Mount the thermostat approximately 5 feet (1.5m) above
the floor, in an area where it will be exposed to a free
circulation of average temperature air. Always refer to
the thermostat instructions, as well as our unit wiring
diagram, and wire accordingly. Avoid mounting the
thermostat in the following locations:
1. Cold Areas - Outside walls or areas where drafts
may affect the operation of the control.
2. Hot Areas - Areas where the sun's rays, radiation,
or warm air currents may affect the operation of
the control.
Should any high limit wires have to be replaced,
they must be replaced with wiring material having a
temperature rating of 200° C minimum.
3. Dead Areas - Areas where the air cannot circulate
freely, such as behind doors or in corners.
9
ELECTRICAL CONNECTIONS (continued)
Figure 5d - Tubular Units Equipped with Natural Gas and Propane (LP) Gas
10
ELECTRICAL CONNECTIONS (continued)
Figure 5e - Tubular Unit Sizes with Optional 2 Stage Ignition
11
VENTING
ANSI now organizes vented
appliances into four categories.
Category I
Category IV
Covers condensing appliances with
positive vent pressure.
Includes non-condensing
appliances with negative vent
pressure, like the traditional
atmospheric unit heater.
Venting Categories
NOTICE: Category II and IV do
not apply to equipment specified
within this manual.
Non
Condensing
Condensing
Category II
Groups condensing appliances
with negative vent pressure.
Negative
Vent
I
II
Pressure
Positive
Vent
Category III
III
IV
Appliances are non-condensing
and operate with a positive vent
pressure.
Pressure
All unit heaters must be vented! All Venting installations shall be in accordance with the latest edition of Part 7,
Venting of Equipment of the National Fuel Gas Code, ANSI Z223.1, or applicable provisions of local building codes.
Refer to page 15 for Canadian installations. Refer to Figures 6, 7, 8A, 8B, 9A and 9B.
CARBON MONOXIDE! Your venting system must not be blocked by any snow, snow
drifts, or any foreign matter. Inspect your venting system to ensure adequate ventilation exists at all
times! Failure to heed these warnings could result in Carbon Monoxide Poisoning (symptoms include
grogginess, lethargy, inappropriate tiredness, or flu-like symptoms).
VERTICALLY VENTED UNIT HEATERS (CATEGORY I)
Observe the following precautions when venting the unit: 5. Tape flue pipe joints with high-temp, RTV or foil face
1. Use flue pipe of the same size as the flue
connections on the gas unit heater (See Table #1).
tape.
All heaters should be vented with UL Listed Type 6. Avoid running vent pipe through unheated spaces.
B vent, a factory built chimney, or a lined brick
and mortar chimney that has been constructed in 7. When this cannot be avoided, insulate the pipe to
accordance with the National Building Code.
prevent condensation of moisture on the walls of the
pipe.
2. Provide as long a vertical run of flue pipe at the gas
unit heater as possible. A minimum of 5 feet (1.5m) 8. Do not damper the flue piping. Failure to open such
of vertical flue is required. The top of the vent pipe
should extend at least 2 feet (0.61m) above the
highest point on the roof. Install a weather cap over
the vent opening.
a damper prior to operating the gas unit heater will
result in the spillage of flue gas into the occupied
space.
9. Avoid installing units in areas under negative
pressure due to large exhaust fans or air conditioning.
When required, a flue vent fan should be installed in
accordance with the instructions included with the
fan.
3. Slope horizontal runs upward from the gas unit
heater at least 1/4-inch per foot (21mm/m) minimum.
Horizontal runs should not exceed 75% of the
vertical height of the vent pipe, or chimney, above
the flue pipe connection, up to a maximum length
of 10 feet (3m). Horizontal portions of the venting 10. Vent connectors serving Category I and Category
system shall be supported at maximum intervals of
4 feet (1.2m). (See Figure 6)
II heaters shall not be connected into any portion of
mechanical draft systems operating under positive
pressure.
4. Use as few elbows as possible.
12
HORIZONTALLY VENTED UNIT HEATERS
(CATEGORY III)
Horizontal venting arrangements are designed to be The vent terminal must be at least 12 inches (305mm)
used with single wall vent pipe. Horizontal venting from the exterior of the wall that it passes through to
arrangements must terminate external to the building prevent degradation of the building material by flue
using either single wall or double wall (Type B) vent. If gases.
single wall vent pipe is used, it must be constructed of
26 gauge galvanized steel or a material of equivalent The vent terminal must be at least 3 feet (1m) above
durability and corrosion resistance for the vent system. grade, or in snow areas, at least 3 feet above the snow
For installations in Canada, use corrosion resistant and line to prevent blockage by snow.
gas-tight, listed vent pipe conforming with local building
codes, or in the absence of local building codes, with Through the wall vent for these appliances shall NOT
current CAN/CGA-B149.1, Installation Codes for Natural terminate over public walkways, or over an area where
Gas Burning Appliances and Equipment or CAN/CGA- the condensate or vapor could create a nuisance or
B149.2, Installation Codes for Propane Gas Burning hazard or could be detrimental to the operation of
Appliances and Equipment. See Figures 7, 8A and 9A for regulators, relief valves, or other equipment.
special installation requirements regarding these venting
conditions.
The vent pipe equivalent length must not exceed 50 feet
(15.2m). Equivalent length is the total length of straight
sections PLUS 15 feet (4.6m) for each 90 elbow and
8 feet (2.44m) for each 45 elbow.
Do not use Type B (double wall)
vent internally within the building on horizontally
vented power vented units!
Maintain 6 inches (152mm) between the vent pipe and
If double wall venting is used, components which are UL combustible materials.
Listed and approved for Category III positive pressure
venting systems MUST be used.
The vent terminal must be installed with a minimum
horizontal clearance of 4 feet (1.2m) from electric meters,
A Breidert Type L, Fields Starkap, or equivalent vent cap gas meters, regulators, and relief equipment.
must be supplied by the customer for each power vented
unit. The vent pipe diameter MUST be as specified in Seal all vent pipe joints and seams to prevent leakage.
Table 1 (“D” Dia. Flue Opening). All unit sizes are factory Use General Electric RTV-108, Dow-Corning RTV-732
equipped with the required flue size collar; attach in place silicone sealant or equivalent; or 3M #425 aluminum
(if not mounted to outlet); refer to included vent collar foil tape (or equivalent). The vent air system must be
instruction sheet for additional requirements.
installed to prevent collection of condensate. Pitch
horizontal pipes downward 1/4 inch per foot (21mm per
meter) toward the outlet for condensate drainage.
Vent Systems - Termination Clearance Requirements
MinimumClearancesfor
Horizontal portions of the venting systems shall be
supported at maximum intervals of 4 feet (1.2m) to
prevent sagging (in Canada, support at 3 feet (1m)
maximum intervals).
Structure
Termination Locations
4 feet below
Door, window or any gravity air inlet 4 feet horizontally
1 foot above
Forced air inlet within 10 ft.
Adjoining building or parapet
Adjacent public walkways
3 feet above
6 feet
Insulate single wall vent pipe exposed to cold air or
running through unheated areas.
7 feet above grade
Each unit must have an individual vent pipe and vent
terminal! Each unit MUST NOT be connected to other
vent systems or to a chimney.
The venting system for these appliances shall terminate
at least 4 feet (1.2m) below, 4 feet (1.2m) horizontal from,
or 1 foot (0.3m) above any door, window, or gravity vent
air inlet into the building.
13
VENTING (continued)
Figure 6 - Vertically Vented Tubular Unit Heater – Category I
Figure 7 - Horizontally Vented Tubular Unit Heater – Category III
ADDITIONAL REQUIREMENT FOR CANADIAN INSTALLATIONS
REFER TO SPECIFICATION TABLE AND INSTALLATION MANUAL FOR PROPER USAGE.
* The following instructions apply to Canadian installations in addition to installation and operating instructions.
1. Installation must conform with local building codes, or in the absence of local codes, with current CGA B149.1, Installation Codes for Natural
Gas Burning Appliances and Equipment, or CGA B149.2, Installation Codes for Propane Gas Burning Appliances and Equipment.
2. Any reference to U. S. standards or codes in these instructions are to be ignored, and the applicable Canadian standards or codes applied
14
VENTING (continued)
Figure 8A
Figure 8B
15
VENTING (continued)
Figure 9A
Figure 9B
16
OPERATION
POWER VENTED PROPELLER UNITS
DIRECT SPARK IGNITION
EXPLANATION OF CONTROLS (See Figure 10):
7. The wall thermostat, supplied optionally, is a
temperature sensitive switch that operates the vent
and ignition system to control the temperature of
the space being heated. The thermostat must be
mounted on a vertical, vibration-free surface free
from air currents and in accordance with the furnished
instructions (also refer to Electrical Section).
1. The unit heater is equipped with a power vent system
that consists of a power venter motor and blower,
pressure switch, and sealed flue collector in place of
the conventional draft diverter.
2. The power venter motor is energized by the room
thermostat through the integrated control board when
a demand for heat is sensed. The pressure switch
measures the flow through the vent system and
energizes the direct spark ignition system beginning
the pre-purge timing when the flow is correct.
START-UP (Also refer to lighting instruction plate
equipped on the unit)
1. Open the manual gas valve in the gas supply line to
the unit heater. Loosen the union in the gas line to
purge it of air.Tighten the union and check for leaks.
The pressure switch MUST NOT be
bypassed.The unit MUST NOT be fired unless the
power venter is operating. An unsafe condition
could result.
Never use an open flame to
detect gas leaks. Explosive conditions may
exist which could result in personal injury or
death.
3. The direct ignition system consists of an ignition
control module and a gas valve. When the pre-
purge period ends, the spark ignition system is
energized, and the gas valve opens to supply gas
to the burners. When the thermostat is satisfied, the
vent system is de-energized and the valve closes to
stop the flow of gas to the unit.
4. The limit switch interrupts the flow of electric current
to the control board, interrupting the flow of gas to the
gas valve if the unit heater becomes overheated.
5. Once the thermostat is satisfied, or the limit switch
interrupts the flow of electric current to the control
board, the unit will begin a post-purge period. When
the post-purge period ends, the power venter motor
is de-energized.
2. Open the manual valve on the unit heater.
3. Turn ON the electrical power.
4. Theunitshouldbeunderthecontrolofthethermostat.
Turnthethermostattothehighestpointanddetermine
that the power venter motor starts and the burners
ignite. Turn the thermostat to the lowest point and
determine that the power venter motor shuts off and
the burners are extinguished.
5. Turn the thermostat to the desired position.
6. See Gas Input Rate and Adjustments sections.
SHUT DOWN
1. Turn the valve selector lever to the “OFF” position.
6. The fan operation is delayed 30 seconds once the
thermostat is closed, and continues operation for 30
seconds after the thermostat opens.
2. Turn off the electricity.
3. To relight, follow “start-up” instructions.
See Figures 10-17 for parts/identification.
NOTICE:The start-up fan delay must not exceed 30
seconds from a cold start.
Figure 10
17
PRIMARY AIR SHUTTER ADJUSTMENT
Primary air adjustment is made at the factory. No field adjustments are necessary.
GAS INPUT RATE
Check the gas input rate as follows (Refer to General 2. PROPANE GAS: An exact manifold pressure of 10.0
Safety Information section for metric conversions).
inches W.C. (2.5 kPa) must be maintained for proper
operation of the unit heater. If the unit is equipped
with a pressure regulator on the combination gas
valve, follow steps "a" through "d" above. If the unit
is not so equipped, the propane gas supply system
pressure must be regulated to attain this manifold
operating pressure.
Never overfire the unit heater, as this
may cause unsatisfactory operation, or shorten the
life of the heater.
1. Turn off all gas appliances that use gas through the
same meter as the unit heater.
3. The adjusted manifold pressure should not vary more
than 10% from pressure specified in Table 5.
2. Turn the gas on to the unit heater.
3. Clock the time in seconds required to burn 1 cubic
foot of gas by checking the gas meter.
4. Insert the time required to burn one cubic foot of
gas into the following formula and compute the input
rate.
Table 5 - Main Burner Orifice Schedule*
TYPE OF GAS
NATURAL
PROPANE
*
INPUT
IN
1075 BTU/Ft3
(40.1 MJ/m3)
2500 BTU/Ft3
(93.1 MJ/m3)
HEATING VALUE
NO. OF
BURNER
ORIFICES
MANIFOLD
PRESSURE
3.5" W.C.
(0.87kPA)
10" W.C.
(2.49 kPA)
1000
BTU
3600 (Sec. per Hr.) X BTU/Cu. Ft.
= Input Rate
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
ORIFICE DRILL
FT 3/HR
93
42
116
42
140
42
163
42
186
42
233
42
280
42
326
42
40
53
50
53
60
53
70
53
80
53
100
53
120
53
140
53
Time (Sec.)
100
125
150
175
200
250
300
350
400
4
5
For example:
Assume the BTU content of one cubic foot of gas is
1000, and that it takes 18 seconds to burn one cubic
foot of gas.
6
7
3600 x 1000
= 200,000
18
8
10
12
14
16
NOTICE: If the computation exceeds, or is less than
95% of the gas BTU/hr. input rating (see Table 2),
adjust the gas pressure.
372
42
160
53
ORIFICE DRILL
Adjust the gas pressure as follows:
*This schedule is for units at operating at normal altitudes of 2000 ft. (610m)
or less.
1. NATURAL GAS: Best results are obtained when
the unit heater is operating at its full rated input with
the manifold pressure of 3.5 inches W.C. (0.9 kPa).
Adjustment of the pressure regulator is not normally
necessary since it is preset at the factory. However,
field adjustment may be made as follows:
When installed in Canada, any references to deration at altitudes in excess
of 2000 ft. (610m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to
1372m), the unit heaters must be orificed to 90% of the normal altitude rating,
and be so marked in accordance with ETL certification.
a. Attach manometer at the pressure tap plug
adjacent to the control outlet.
b. Remove the regulator adjustment screw cap,
located on the combination gas valve.
c. With a small screwdriver, rotate the adjustment
screw counterclockwise to decrease pressure, or
clockwise to increase pressure.
d. Replace regulator adjustment screw cap.
18
Table 5A
TUBULAR UNIT HEATER
HIGH ALTITUDE DERATION
NATURAL GAS
PROPANE (LP) GAS
This Tubular Unit Heater has been manufactured utilizing
standard burner orifices and a normal manifold pressure
setting as per the specifications shown on your unit rating
plate.
Heating*
Value
BTU/Cu. ft.
Manifold
Pressure
(In. W.C.)
Heating*
Value
BTU/Cu. ft.
Manifold
Pressure
(In. W.C.)
Altitude
(Feet)
2,000
2,500
3,000
3,500
4,000
4,500
5,000
5,500
6,000
6,500
7,000
7,500
8,000
8,500
9,000
9,500
10,000
948
931
914
897
881
865
849
833
818
802
787
771
756
741
726
711
696
3.5
3.5
3.3
3.2
3.2
3.2
3.1
3.1
3.0
3.0
2.9
2.9
2.8
2.8
2.7
2.7
2.6
2,278
2,237
2,196
2,156
2,116
2,077
2,039
2,000
1,964
1,927
1,891
1,853
1,817
1,781
1,745
1,709
1,673
8.6
8.5
8.4
8.4
8.3
8.2
8.1
8.0
7.9
7.7
7.6
7.5
7.4
7.2
7.1
6.9
6.8
All unit deration must be done through field adjustments
by a qualified technician. Once the proper adjustments
are made in the field, attach label #J17-06459 to the unit,
and record adjusted manifold pressure, altitude of the
unit installation and the technician’s name and date on
the label using a permanent marker.
Refer to Installation Instruction section on Adjustments-
Gas Input Rate for adjusting the manifold pressure.
*Notes:
1. Consult local utility for actual heating value.
2. Tables based on heating value of 1,050 BTU/Cu. ft. at sea level.
19
Table 6 - Tubular Propeller Troubleshooting Guide
POSSIBLE CAUSE(S) CORRECTIVE ACTION
SYMPTOMS
A. Flame pops back.
1. Burner orifice too small.
1. Check with local gas supplier for proper orifice
size and replace. Refer to “Operation”.
B. Noisy Flame.
1. Irregular orifice causing whistle or resonance.
2. Excessive gas input.
1. Replace orifice.
2. Test and reset manifold pressure.
C. Yellow tip flame (some yellow
tipping on LP gas is permissible).
1. Clogged main burners.
2. Misaligned orifices.
3. Insufficient combustion air.
4. Possibly over fired.
1. Clean main burner ports.
2. Replace manifold assembly.
3. Insufficient combustion air.
4. Check gas input and manifold pressures.
D. Floating flame.
E. Gas odor.
1. Blocked venting.
1. Clean Flue. Refer to “Installation”.
2. Insufficient combustion air.
3. Blocked heat exchanger.
4. Air leak into combustion chamber
or draft hood.
2. Clean combustion air inlet openings.
3. Clean heat exchanger. Refer to “Installation”.
4. Determine cause and repair accordingly.
1. Shut off gas supply immediately!
2. Leaking gas test port on valve.
3. Blocked heat exchanger.
1. Inspect all gas piping and repair.
2. Check to ensure gas test ports are seated.
3. Clean heat exchanger/flue.
4. Clean flue collector.
4. Blocked draft hood.
5. Negative pressure in the building.
5. See “Installation”.
F. Delayed ignition.
1. Improper ground.
1. Check grounding wires and spark bracket
connections.
2. Bad or broken spark cable.
3. Faulty control.
2. Inspect spark cable connections and cuts.
3. Check to ensure spark is energized after
pre purge period.
4. Pressure regulator set too low.
4. Test and reset manifold pressure refer to
“Operations”.
5. Main burner orifices dirty.
6. Improper venting.
5. Clean or replace orifices.
6. Refer to “Installation”.
G. Failure to ignite.
1. Gas supply is off.
2. No power supply to unit.
1. Open all manual valves “check for leaks”.
2. Turn on power supply, check fuses and
replace if bad.
3. Thermostat not calling.
4. Defective high limit.
3. Turn up thermostat, Check for 24v on
terminals R and W1 on terminal strip.
4. Check switch for continuity if open with no
heat present, replace.
5. Defective drafter prove switch.
5. Check switch operation to ensure
switch closes after draftor purge period.
If it does not make/check tubing
connections/ blockage.
6. Check all wiring per diagram.
6. Loose wiring.
7. Improper ground.
8. Improper thermostat or transformer wiring.
7. Check all ground wires and connections.
8. Check both, for wiring according to diagram;
check for 24V at gas valve terminals during
trial for ignition period if present and valve
does not open. Replace valve.
H. Condensation.
1. Improper venting.
2. Unit under fired.
1. Refer to “Installation, Venting”.
2. Check gas supply pressures to unit. Refer
to “Installation”.
3. Building too cold.
3. Refer to “Installation”.
20
Table 6 - Tubular Propeller Troubleshooting Guide (continued)
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
SYMPTOMS
I. Burners will not shut off.
1. Thermostat located incorrectly.
1. Relocate thermostat away from outside
wall or drafts.
2. Improper thermostat wiring.
3. Shorted circuit.
2. Check thermostat circuit for open and close
on terminal strip on heater “R” and “W”.
3. Check thermostat circuit for shorts “staples
piercing wires”.
4. Defective sticking gas valve.
5. Excessive gas supply pressure.
4. Check for 24v on gas valve terminals when
thermostat is not calling.
5. Refer to “Installation”.
J. Rapid burner cycling.
1. Loose electrical connections at thermostat
or gas valve.
1. Tighten all electrical connections.
2. Excessive thermostat heat
anticipator setting.
3. Unit cycling on high limit.
2. Adjust heat anticipator setting for longer
cycles. Refer to “Electrical Connections”.
3. Check for proper air supply across heat
exchanger and proper gas supply.
4. Relocate thermostat .
4. Poor thermostat location.
K. Noisy power ventor.
L. Fan will not run.
1. Power ventor wheel loose.
2. Power ventor wheel is dirty.
3. Power ventor wheel is rubbing on the housing.
1. Replace or tighten.
2. Clean power ventor wheel.
3. Realign power ventor wheel.
1. Loose electrical connections.
2. Defective motor or overload.
1. Check and tighten wires on fan circuit.
2. Test for 115v on terminal ACB Heat and
“L2” if voltage is present replace motor.
3. Test for 115v on terminal ACB Heat and
“L2” on the control board, if voltage is not
present 45 seconds after trial for ignition
replace board.
3. Defective control board.
M. Fan motor turns on and off
while burner is operating.
1. Motor overload protection is tripping.
1. Check motor amps against motor name
plate, check voltage, replace if found defective.
2. Check for 115v between motor leads.
3. Check terminal ACB Heat for voltage if
voltage not constant, replace board.
2. Loose wiring or connection.
3. Control board is defective.
N. Fan will not stop.
O. Not enough heat.
1. Control Board is in flame failure mode.
1. Turn 115v power off to the unit, wait 10
seconds and reapply voltage to the unit.
2. Check wiring of fan circuit to wiring diagram.
3. If unit is not calling for heat and board is not
in a flash code mode, replace board.
2. Fan improperly wired.
3. Defective board.
1. Incorrect gas input.
2. Heater undersized.
1. Refer to “Operation”.
2. Is the heater output sized correctly for
heat loss of the space. Has the space
been enlarged.
3. Thermostat malfunction.
4. Heater cycling on limit.
3. Check thermostat circuit, 24v on terminals
“R” and “W” on terminal strip.
4. Check air movement across heat exchanger.
Check voltage and amps at the fan motor.
Check gas input to ensure unit is not over
fired. Check heat exchanger to ensure unit
is not dirty.
5. Incorrect orifice sizes.
1. Unit is over fired.
5. Check orifice size, replace if undersized.
P. Too much heat.
1. Refer to “Operation”. Check orifice size.
If too big replace.
2. Thermostat malfunction.
3. Heater runs continuously.
2. Check thermostat for operation, to ensure
circuit open and closes.
3. Check wiring per diagram; check
operation at the gas valve, look for
a short in thermostat circuit.
21
Table 6 - Tubular Propeller Troubleshooting Guide
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
SYMPTOMS
Q. Cold air is delivered during
heater operation.
1. Incorrect manifold pressure or input.
2. Air throughput too high.
1. Refer to “Operation”.
2. Refer to “Operation”.
R. High limit tripping.
1. Unit is over fired.
2. Air flow is low.
1. Burner orifices may be too large, verify
and replace.
2. Check for proper voltage, ensure fan
blade is correct.
3. Defective switch.
3. Check operation of switch, did the switch
open when unit is running or is the switch
open during start-up.
4. Defective control board.
4. Check for 24v on line side of the high limit.
Constant voltage should be recorded if not
control board is suspect. Check flash code.
S. Power ventor will not run.
1. Loose wiring or connections.
2. Motor overload is tripped or bad motor.
3. Bad control board.
1. Check all wring in the power vent circuit to
ensure good connection, including “Neutral”.
2. Check for 115v between motor leads and
check amp draw of motor. Replace if needed.
3. Check for continuous 115v on terminal
“CBM Blower” and neutral during call for
heat. If not present and all checks are
normal, replace.
T. Power ventor turns on and off
during operation.
1. Power ventor improperly wired.
2. Motor overload cycling or defective motor.
3. Defective control board.
1. Check power ventor circuit per wiring
diagram.
2. Check motor voltage and amp draw to motor
name plate, replace if motor found defective.
3. Check for continuous 115v on terminal
“CMB Blower” during call for heat, replace
board if found defective.
U. Power ventor will not stop.
1. Power ventor improperly wired.
2. Main burner did not light on call for heat.
3. Defective control board.
1. Check power ventor circuit per wiring
diagram.
2. Heater is in lockout mode check flash code
table for problem.
3. No flash codes present along with no call
for heat, replace control board.
22
Table 6 - Tubular Propeller Troubleshooting with LED Indicator Assistance
No Cycling or appliance power
INDICATES
Control OK, no call for heat.
CHECK/REPAIR
Not Applicable
LED STATUS
Slow Flash
or thermostat call for heat
since appliance failure has
occured.
Fast Flash
Steady Off
Control OK, call for heat present.
Internal control fault, or no power.
Not Applicable
1. Line voltage on terminals 120
and C on transformer.
2. Low voltage (24V) on terminals
24 and C on transformer.
3. 5 Amp fuse on circuit board.
Line voltage power can
cause product damage,
severe injury or death.
Only a trained experienced
service technician should
perform this trouble-
shooting.
Steady On
2 Flashes
Control internal failure or bad ground.
1. Common side of transformer
grounded to chassis.
2. Loose spark ignitor.
In lockout from failed ignitions
or flame losses.
1. Gas supply off or gas supply
pressure too low.
2. Flame sense rod contaminated
or loose wire.
3. Gas valve switch is off or wires
are not connected.
4. Broken or cracked porcelain on
flame probe or spark ignitor.
1. Check the system thermo-
stat to make sure it is call-
ing for heat. (Do not cycle
the thermostat on and off at
this time.)
2. Remove the appliance
burner compartment door.
Do not interrupt power
to the control board by
opening any electrically
interlocked panels.
3. Observe the LED indicator
on the control board (a
greem LED labeled “OK”
indicates system faults);
check and repair system
as noted in the chart to the
right.
3 Flashes
Pressure Switch open with inducer on
or closed with inducer off.
1. Obstructions or restrictions
in appliance air intake or flue
outlet are preventing proper
combustion airflow.
2. Moisture or debris in tubing that
connects pressure switch and
draft inducer.
3. Airflow switch jumpered or
miswired.
4 Flashes
Limit or rollout switch is open.
1. Open manual reset rollout switch.
2. Gas pressure too high, over fire
condition.
3. Incorrect airflow due to blockage
or motor not operating.
5 Flashes
6 Flashes
Flame sensed while gas valve is off.
On-board microprocessors disagree.
1. Flame probe miswired
or shortened.
1. Thermostat is interfering
with control board.
*NOTICE: Air flow proving
switch and power ventor
hose barbs must be free
of any dust or debris at all
times. Periodically check
these openings and/or if any
problems occur.
23
MAINTENANCE
PERIODIC SERVICE
NOTICE: The heater and vent system should be
checked once a year by a qualified technician.
2. Turn off the manual gas valve and electrical power to
the unit heater.
3. To clean or replace the burners, remove burner
cover. Remove top strip from above burners. Lift
burners up and pull away from manifold to remove.
All Maintenance/Service information should be recorded
accordingly on the Inspection Sheet provided in this 4. With the burners removed, wire brush the inside
manual.
surfaces of the heat exchanger.
5. Remove any dirt, dust, or other foreign matter from
the burners using a wire brush and/or compressed
air.
6. Reassemble the unit heater by replacing all parts in
reverse order.
Open all disconnect switches
and disconnect all electrical and gas supplies
and secure in that position before servicing unit.
Failure to do so may result in personal injury or
death from electrical shock.
7. Check the burner adjustment.
8. Check all gas control valves and pipe connections for
leaks.
Gas tightness of the safety shut-
off valves must be checked on at least an annual
basis.
9. Check the operation of the automatic gas valve by
lowering the setting of the thermostat, stopping the
operation of the gas duct furnace. The gas valve
should close tightly, completely extinguishing the
flame on the burners.
To check gas tightness of the safety shut-off valves,
turn off the manual valve upstream of the appliance
combination control. Remove the 1/8 inch pipe plug on 10. Inspect and service motor/fan assembly. To maintain
the inlet side of the combination control and connect
a manometer to that tapping. Turn the manual valve
efficient air flow, inspect and clean the fan blades
and guard to prevent buildup of foreign matter.
on to apply pressure to the combination control. Note 11. Check lubrication instructions on motor. If oiling is
the pressure reading on the manometer, then turn the
valve off. A loss of pressure indicates a leak. If a leak
is detected, use a soap solution to check all threaded
connections. If no leak is found, combination control is
faulty and must be replaced before putting appliance
back in service.
required, add 3 or 4 drops of electric motor oil as
follows:
a. Light Duty - After 3 years or 25,000 hours of
operation.
b. Average Duty - Annually after 3 years or 8,000
hours of operation.
c. Heavy Duty - Annually after 1 year or at least
1500 hours of operation.
Should maintenance be required, perform the following
inspection and service routine:
Never over oil the motor or premature
1. Inspect the area near the unit to be sure that there is failure may occur!
no combustible material located within the minimum
clearance requirements listed in this manual.
12. Check and test the operational functions of all safety
devices supplied with your unit.
Under no circumstances should
combustible material be located within the
clearances specified in this manual. Failure to
provide proper clearance could result in personal
injury or equipment damage from fire.
24
LIMITED WARRANTY
Power Vented Tubular Propeller Unit Heaters
1. The "Manufacturer" warrants to the original owner at original installation site that the above model Gas-Fired
Heater ("the Product") will be free from defects in material or workmanship for (1) year from the date of shipment
from the factory, or one and one-half (1-1/2) years from the date of manufacture, whichever occurs first. The
Manufacturer further warrants that the complete heat exchanger, and burners be free from defects in material or
workmanship for a period of ten (10) years from the date of manufacture. If upon examination by the Manufacturer
the Product is shown to have a defect in material or workmanship during the warranty period, the manufacturer
will repair or replace, at its option, that part of the Product which is shown to be defective.
2. This limited warranty does not apply:
a. if the product has been subjected to misuse or neglect, has been accidentally or intentionally damaged, has
not been installed, maintained, or operated in accordance with furnished written instructions, or has been
altered or modified in any way by any unauthorized person.
b. to any expenses, including labor or material, incurred during removal or reinstallation of the Product
c. to any damage due to corrosion by chemicals, including halogenated hydrocarbons, precipitated in the air
d. to any workmanship of the installer of the Product
3. This limited warranty is conditional upon:
a. advising the installing contractor, who in turn notify the distributor or manufacturer
b. shipment to the Manufacturer of that part of the Product thought to be defective. Goods can only be returned
with prior written approval of the Manufacturer. All returns must be freight prepaid.
c. determination in the reasonable opinion of the Manufacturer that there exists a defect in material or
workmanship
4. Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with
respect to such repaired or replaced part beyond the stated warranty period.
5. THIS LIMITED WARRANTY IS IN LIEU OF ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, AND
ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND
EXCLUDED FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE
IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE
WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR
ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL
OWNER OF THE PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH
MAY VARY BY JURISDICTION.
In the interest of product improvement, we reserve the right to make changes without notice.
25
IDENTIFICATION OF PARTS
PROPELLER UNIT HEATERS
Figure 11 - Propeller Parts
Figure 12 - Component Parts
Fan Blade
Fan Guard
Motor
Hardware
Hardware
D4430
Figure 13 - Heat Exchanger Assembly
Figure 14 - Electrical Control Panel
26
Figure 16 - Power Venter Assembly
(300/400 Unit Sizes Shown)
Figure 15 - Power Venter Assembly
(100/250 Unit Sizes Shown)
Figure 17 - Turbulator/High Limit Location
HOW TO ORDER REPLACEMENT PARTS
Please send the following information to your local representative: if further assistance is needed, contact the
manufacturer's customer service department.
•Model Number
•Serial Number (if any)
•Part Description and Number as shown in Replacement parts Catalog
27
GAS EQUIPMENT
START-UP
Customer ____________________________________ Job Name & Number _________________________
PRE-INSPECTION INFORMATION
With power and gas off.
Type of Equip:
Unit Heater
Serial Number _________________________ Model Number __________________________
Name Plate Voltage:
Type of Gas:
_____________
Natural
Name Plate Amperage: _____________
LP
Tank Capacity _______ lbs.
_______ kg
Rating: ______ BTU @ ____ °F
______ kw @ ____ °C
❐
❐
❐
❐
❐
❐
❐
❐
Are all panels, doors, vent caps in place?
Has the unit suffered any external damage?
Damage ______________________________
Does the gas piping and electric wiring appear to be installed in a professional manner?
Has the gas and electric been inspected by the local authority having jurisdiction?
Is the gas supply properly sized for the equipment?
Were the installation instructions followed when the equipment was installed?
Have all field installed controls been installed?
Do you understand all the controls on this equipment? If not, contact your wholesaler or rep.
(DO NOT START this equipment unless you fully understand the controls.)
GENERAL
GAS HEATING
With power and gas off.
With power and gas on.
❐ Make certain all packing has been removed.
❐ Tighten all electrical terminals and connections.
❐ Check damper linkages for tightness.
❐ Inlet gas pressure.
❐ Burner ignition.
____ in. W.C. or ____ kPa
❐ Manifold gas pressure. ____ in. W.C. or ____ kPa
❐ Cycle on HIGH LIMIT.
❐ Check all fans & blowers for free movement.
❐ Check all controls for proper settings.
❐ Cycle firestat and/or freezestat.
❐ Check electronic modulation. Set at: __________
❐ Cycle and check all other controls not listed.
❐ Check operation of remote panel.
❐ Entering air temp. _____ °F or ____ °C
❐ Discharge air temp. (high fire) ____ °F. or ____ °C
❐ External static pressure _________ in. W.C.
❐ Cycle by thermostat or operating control.
Remarks:
_____________________________________________
__________________________________________________
__________________________________________________
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