Sterling Gas Heater GF 150 User Manual

(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  
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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
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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  
LOverall 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 ue collar is included with the unit and should be eld 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 certication.  
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
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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
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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
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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.gure. 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
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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
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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
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ELECTRICAL CONNECTIONS (continued)  
Figure 5d - Tubular Units Equipped with Natural Gas and Propane (LP) Gas  
10  
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ELECTRICAL CONNECTIONS (continued)  
Figure 5e - Tubular Unit Sizes with Optional 2 Stage Ignition  
11  
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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  
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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  
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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  
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VENTING (continued)  
Figure 8A  
Figure 8B  
15  
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VENTING (continued)  
Figure 9A  
Figure 9B  
16  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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  
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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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