Mestek SEPARATED COMBUSTION GAS FIRED PROPELLER UNIT HEATER Specifications

STPIM-2
J30-09054
INSTALLATION INSTRUCTIONS AND PARTS IDENTIFICATION
SEPARATED COMBUSTION 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.
Unit No.
Serial No.
FOR YOUR SAFETY
The use and storage of gasoline or other flammable vapors and liquids in open containers in
the vicinity of this appliance is hazardous.
FOR YOUR 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.
ERTEK
INT
CM
VER
IFIE D
ENERGY
PERFORMANCE
VERIFIED
RENDEMENT
ENERGETIQUE
VERIFIE
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.
07/13
260 NORTH ELM ST., WESTFIELD, MA 01085
TEL: (413) 568-9571 FAX: (413) 562-8437
www.mestek.com
TABLE OF CONTENTS
SPECIFICATIONS
Description………………………………………............ 2
Performance & Dimensional Data .............................. 4
GENERAL SAFETY INFORMATION
Installation Codes……………………………............. 2,3
Special Precautions…………………………. ............ 2,3
INSTALLATION
Locating Units…………………………………. ............. 5
Combustion Air……………………………….. .............. 5
Heat Throw Data…………………………….. ............... 6
Clearances………………………………………............ 7
Suspension of Units.................................................... 7
Gas Piping .................................................................. 8
PIPE INSTALLATION…………………………................ 9
ELECTRICAL CONNECTIONS……………. ..........10-12
VENTING………………………………………… .....13-18
OPERATION
Explanation of Controls……………………................ 19
Gas Input Rate…………………………………........... 20
Main Burner Orifice Schedule…………. ................... 20
TROUBLESHOOTING GUIDES…………..............22-25
MAINTENANCE……………………………….. ............ 26
WARRANTY……………………………………… ......... 27
IDENTIFICATION OF PARTS ................................ 28,29
START-UP INSPECTION SHEET…………. .Back Cover
NOTICE: It is the equipment owners responsibility to provide any scaffolding or other apparatus required to
perform emergency service or annual/periodic maintenance to this equipment.
DESCRIPTION
The Separated Combustion Tubular Gas Fired Unit
Heaters are a factory assembled, power vented, low
static pressure type propeller fan unit heaters designed
to be suspended within the space to be heated.
THESE HEATERS ARE NOT TO BE CONNECTED
TO DUCTWORK. The designs are certified by ETL as
providing a minimum of 83% thermal efficiency, and
approved for use in California. Do not alter these units
in any way. If you have any questions after reading this
manual, contact the manufacturer.
Figure 1 - Separated Combustion Tubular Propeller Unit Heater
See Identification of Parts, Figures 8-15.
The following terms are used throughout this manual, in addition to the ETL requirements to bring attention to the
presence of potential hazards, or to important information concerning the product:
Indicates an imminently hazardous
situation which, if not avoided, will result in
death, serious injury, or substantial property
damage.
Indicates an imminently hazardous
situation which, if not avoided, may result in minor
injury or property damage.
NOTICE: Used to notify of special instructions on
installation, operation, or maintenance which are
important to equipment but not related to personal
injury.
Indicates an imminently hazardous situation which, if not avoided, could result
in death, serious injury, or substantial property
damage.
2
GENERAL SAFETY INFORMATION
Failure to comply with the general
safety information may result in extensive
property damage, severe personal injury, or
death.
Do not attempt to convert
the heater for use with a fuel other than the
one intended unless using an appropriate
conversion kit provided by the manufacturer.
Such conversion is dangerous, as it will create
the risks previously listed.
This product must be installed by
a licensed plumber or gas fitter when installed
within the Commonwealth of Massachusetts.
Make certain that the power source conforms to the
electrical requirements of the heater.
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, 1-800463-6727. 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.
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.
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 CSA-B149.1 “Installation Codes for Natural
Gas Burning Appliances and Equipment” or CSA-B149.2
“Installation Codes for Propane Gas Burning Appliances
and Equipment.” These unit heaters have been designed
and certified to comply with CSA 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 alter the unit heater in any
way or damage to the unit and/or severe personal
injury or death may occur!
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.
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.
In cases in which property damage may result from
malfunction of the heater, a back-up system or
temperature sensitive alarm should be used.
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!
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.
Unless otherwise specified, the following conversions
may be used for calculating SI unit measurements:
1000 BTU/cu. ft. = 37.5 MJ/m3
1 foot = 0.305 m
1000 BTU per hour = 0.293 kW
1 inch = 25.4 mm
1 inch water column = 0.249 kPa
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
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 - Separated Combustion Tubular Propeller Unit Heater
Unit Capacity (MBH)
100
PERFORMANCE DATA†
Input - BTU/Hr.
100,000
(kW)
(29.3)
Output - BTU/Hr.
83,000
(kW)
(24.3)
Thermal Efficiency (%)
Free Air Delivery - CFM
1,600
(cu. m/s)
(0.756)
Air Temperature Rise - Deg. F
47
(Deg. C)
(26)
Full Load Amps at 120V
6.4
MOTOR DATA: Motor HP (Qty)
1/10
Motor kW
(0.080)
Motor Type
SP
RPM
1,050
Amps @ 115V
4.2
DIMENSIONAL DATA - inches (mm)
"A" Overall Height to Top of Flue
"B" Jacket Width of Unit
125
150
175
200
250
300
350
400
125,000
(36.6)
103,750
(30.4)
150,000
(43.9)
124,500
(36.4)
175,000
(51.2)
145,250
(42.5)
250,000
(73.2)
207,500
(60.7)
300,000
(87.8)
249,000
(72.9)
350,000
(102.5)
290,500
(85.1)
400,000
(117.1)
332,000
(97.2)
2,200
(1.039)
42
(23)
2,400
(1.133)
47
(26)
2,850
(1.346)
46
(26)
200,000
(58.6)
166,000
(48.6)
83
3,200
(1.511)
47
(26)
8.0
1/3
(0.25)
PSC
1,140
5.8
3,450
(1.629)
54
(30)
5,000
(2.361)
45
(24)
11.3
1/4 (2)
(0.19)
PSC
1,140
9.4
5,600
(2.644)
47
(26)
5,800
(2.738)
51
(28)
6.9
1/4
(0.19)
PSC
1,140
4.7
33-3/4
(857)
20-3/4
(527)
13-3/8
(340)
"C" Width to CL Flue
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)
55-1/4
(1403)
6
(152)
32-3/4
(831)
19-3/8
(492)
"D" Depth to Rear of Housing
11
(279)
"E" Hanging Distance Width
18-5/8
(473)
18-3/4
(476)
"F" Discharge Opening Width
30-5/8
(778)
30-3/4
(781)
"G" Depth to CL Flue
4-3/4
(121)
"L" Overall Unit Width
25-1/4
(641)
"M" Flue Size Diameter* - in
(mm)
Gas Inlet, Natural Gas - in
Gas Inlet, LP Gas - in
Approximate Unit Weight - lb
(kg)
Approximate Ship Weight - lb
(kg)
37-1/4
(946)
5
(127)
135
(61)
175
(79)
1/2
1/2
157
(71)
197
(89)
147
(67)
187
(85)
194
(88)
244
(111)
204
(93)
254
(115)
13.5
1/3 (2)
(0.25)
PSC
1,140
11.6
214
(97)
264
(120)
3/4
1/2 OR 3/4
311
325
(141)
(147)
371
385
(168)
(175)
339
(154)
399
(181)
† 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 field 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 field derated to 90% of the normal altitude rating, and be so marked in accordance with the ETL certification. See Table 6A for field
deration information.
* Flue collar is factory supplied with unit; to be field installed per included instructions.
** LEGEND:
SP = SHADED POLE
PSC = PERMANENT SPLIT CAPACITOR
Figure 2 - Dimensional Drawing – Separated Combustion Tubular Propeller Unit Heater
1-3/8'
E
(35mm)
(Hanging)
(Hanging)
D
32-1/2'
(826mm)
C
M
(Flue Diameter)
G
11-5/8
(295mm)
(Hanging)
L
B
33"
(838mm)
A
24-1/2
(622mm)
(Discharge
Opening)
Electrical Control Panel
Combustion Air
Inlet
Rear View
High Limit
Access
Gas Valve
Connection
Side View
4
F
1"
(Discharge
Opening)
(25mm)
Front View
D9067B
INSTALLATION
PARKING STRUCTURES: 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.
Do not install unit heaters in
corrosive or flammable atmospheres! Premature
failure of, or severe damage to the unit will
result!
Avoid locations where extreme
drafts can affect burner operation. Unit heaters
must not be installed in locations where air for
combustion would contain chlorinated, halogenated or acidic vapors. If located in such an
environment, premature failure of the unit will
occur!
In Canada, installation must be in accordance to the
latest edition of CSA B149 “Installation Codes for Gas
Burning Appliances and Equipment.”
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.
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.
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 ft. (2.4m) above the floor, measured to the bottom of
the unit. At heights above 8 ft. (2.4m), less efficient air
distribution will result. If a unit is to be mounted below
8 ft. (2.4m) from the floor, an OSHA approved fan
guard is required on the unit.
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.
AIRCRAFT HANGARS: Unit Heaters must be installed
in aircraft hangars as follows: In aircraft hangars, unit
heaters must be at least 10 ft. (3.0m) above the upper
surface of wings or engine enclosures of the highest
aircraft to be stored in the hangar, and 8 ft. (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.
NOTICE: Unit Heater sizing should be based on heat
loss calculations where the unit heater output equals
or exceeds heat loss.
PUBLIC GARAGES: In repair garages, unit heaters must
be located at least 8 ft. (2.4m) above the floor. Refer to
the latest edition of NFPA 88B, Repair Garages.
5
INSTALLATION (continued)
Table 2 - Heat Throw Data
Standard Heater
30° Nozzle
60° Nozzle
90° Nozzle
UNIT SIZE BTU/Hr
Degree
of
Nozzle
Distance From
Floor to Bottom
of Unit "H" - ft
(m)
100,000
125,000
150,000
None
8
60
65
70
75
80
90
105
110
120
(2.4)
(18.3)
(19.8)
(21.3)
(22.9)
(24.4)
(27.4)
(32.0)
(33.5)
(36.6)
300,000
350,000
400,000
Approximate Distance of Heat Throw - Feet (Meters)
54
56
60
64
68
78
90
95
100
(16.5)
(17.1)
(18.3)
(19.5)
(20.7)
(23.8)
(27.4)
(29.0)
(30.5)
12
44
46
49
57
61
68
80
84
90
(3.7)
(13.4)
(14.0)
(14.9)
(17.4)
(18.6)
(20.7)
(24.4)
(25.6)
(27.4)
NR
NR
NR
NR
20
(6.1)
45
49
52
60
70
74
80
(13.7)
(14.9)
(15.8)
(18.3)
(21.3)
(22.6)
(24.4)
NR
NR
46
54
63
66
70
(14.0)
(16.5)
(19.2)
(20.1)
(21.3)
8
65
70
75
80
85
95
115
120
125
(2.4)
(19.8)
(21.3)
(22.9)
(24.4)
(25.9)
(29.0)
(35.1)
(36.6)
(38.1)
10
57
60
64
68
72
86
99
105
110
(3.0)
(17.4)
(18.3)
(19.5)
(20.7)
(21.9)
(26.2)
(30.2)
(32.0)
(33.5)
12
50
54
57
60
64
77
88
94
100
(3.7)
(15.2)
(16.5)
(17.4)
(18.3)
(19.5)
(23.5)
(26.8)
(28.7)
(30.5)
15
(4.6)
20
(6.1)
NR
NR
45
48
50
53
64
74
79
84
(13.7)
(14.6)
(15.2)
(16.2)
(19.5)
(22.6)
(24.1)
(25.6)
NR
NR
44
47
58
66
71
75
(13.4)
(14.3)
(17.7)
(20.1)
(21.6)
(22.9)
8
75
80
85
90
95
110
125
130
138
(2.4)
(22.9)
(24.4)
(25.9)
(27.4)
(29.0)
(33.5)
(38.1)
(39.6)
(42.1)
10
65
70
75
79
83
95
109
115
120
(3.0)
(19.8)
(21.3)
(22.9)
(24.1)
(25.3)
(29.0)
(33.2)
(35.1)
(36.6)
12
60
64
68
72
76
84
100
103
108
(3.7)
(18.3)
(19.5)
(20.7)
(21.9)
(23.2)
(25.6)
(30.5)
(31.4)
(32.9)
15
50
54
56
61
65
71
85
88
94
(4.6)
(15.2)
(16.5)
(17.1)
(18.6)
(19.8)
(21.6)
(25.9)
(26.8)
(28.7)
20
(6.1)
90°*
250,000
10
15
60°
200,000
(3.0)
(4.6)
30°
175,000
15
(4.6)
20
(6.1)
25
(7.6)
30
(9.1)
NR
30 x 25
49
52
55
59
65
77
81
85
(14.9)
(15.8)
(16.8)
(18.0)
(19.8)
(23.5)
(24.7)
(25.9)
35 x 30
40 x 35
45 x 40
50 x 40
60 x 45
70 x 45
80 x 50
100 x 50
(10.7) (9.1)
(12.2) (10.7)
(13.7) (12.2)
(15.2) (12.2)
(18.3) (13.7)
(21.3) (13.7)
(24.4) (15.2)
(30.5) (15.2)
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
(9.1)
(7.6)
40 x 35
56 x 40
65 x 40
70 x 45
80 x 45
(12.2) (10.7)
(17.1) (12.2)
(19.8) (12.2)
(21.3) (13.7)
(24.4) (13.7)
50 x 35
60 x 35
65 x 40
75 x 40
(15.2) (10.7)
(18.3) (10.7)
(19.8) (12.2)
(22.9) (12.2)
NR
55 x 35
60 x 35
65 x 40
(16.8) (10.7)
(18.3) (10.7)
(19.8) (12.2)
* It is not recommended to mount a unit with a 90° nozzle under 10 feet.
Notes: 1. All throw data figures are approximations. Allowances should be made for optimum performance, altitude, etc.
2. NR - Units not recommended at these mounting heights.
3. 30°, 60° and 90° nozzles are shipped unassembled.
6
INSTALLATION (continued)
Figure 3A - Heater Mounting*
CLEARANCES: Each Gas Unit Heater shall be
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 in. (152mm). To ensure access to the control box, a
minimum of 18 in. (457mm) is required for the control
box side. A minimum clearance of 6 in. (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 in. (305mm) from any combustible. The
distance between rear of unit and vertical wall should
be no less than 18 in. to maintain inlet air flow. The
distance between the flue collector and any combustible
must be no less than 6 in. (152mm). Also see AIR FOR
COMBUSTION and VENTING sections.
*All hanging hardware and wood is not included with the unit (To
be field supplied).
Note: Threaded rod is 3/8".
NOTICE: Increasing the clearance distances may
be necessary if there is a possibility of distortion or
discoloration of adjacent materials.
Figure 3B - Heater Suspension
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!
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.
Note: Threaded rod is 3/8".
Unit Heaters must be hung level
from side to side and from front to back, see Figure
3A and 3B. 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 and 3B for suspension of units.
7
INSTALLATION (continued)
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
To provide adequate gas pressure to the gas unit heater,
size the gas piping as follows:
NOTICE: If more than one unit heater is to be served
by the same piping arrangement, the total cu. ft./hr.
input and length of pipe must be considered.
1. Find the cu. ft./hr. by using the following formula:
Input BTU/Hr.
Cu. ft./hr. =
1000
NOTICE: If the gas unit heater is to be fired with LP
gas, consult your local LP gas dealer for pipe size
information.
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.
Example:
It is determined that a 67 ft. (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 = 200 Cu. ft./hr.
1,000 BTU/cu. ft.
Using Table 3, a 1 inch pipe is needed.
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.
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
Pipe Size
Dia.
in.
1/2
in.
0.622
3/4
0.824
1
1.049
1 1/4
1.380
1 1/2
1.610
2
2.067
2 1/2
2.469
3
3.068
4
4.026
Length of Pipe, Feet (meters)
10
(3.0)
175
(4.96)
360
(10.2)
680
(19.3)
1400
(39.6)
2100
(59.5)
3950
(112)
6300
(178)
11000
(311)
23000
(651)
20
(6.1)
120
(3.40)
250
(7.08)
465
(13.2)
950
(26.9)
1460
(41.3)
2750
(77.9)
4350
(123)
7700
(218)
15800
(447)
30
(9.1)
97
(2.75)
200
(5.66)
375
(10.6)
770
(21.8)
1180
(33.4)
2200
(62.3)
3520
(99.7)
6250
(177)
12800
(362)
40
(12.2)
82
(2.32)
170
(4.81)
320
(9.06)
660
(18.7)
990
(28.0)
1900
(53.8)
3000
(85.0)
5300
(150)
10900
(309)
50
(15.2)
73
(2.07)
151
(4.28)
285
(8.07)
580
(16.4)
900
(25.5)
1680
(47.6)
2650
(75.0)
4750
(135)
9700
(275)
60
(18.3)
66
(1.87)
138
(3.91)
260
(7.36)
530
(15.0)
810
(22.9)
1520
(43.0)
2400
(68.0)
4300
(122)
8800
(249)
70
(21.3)
61
(1.73)
125
(3.54)
240
(6.80)
490
(13.9)
750
(21.2)
1400
(39.6)
2250
(63.7)
3900
(110)
8100
(229)
80
(24.4)
57
(1.61)
118
(3.34)
220
(6.23)
460
(13.0)
690
(19.5)
1300
(36.8)
2050
(58.0)
3700
(105)
7500
(212)
90
(27.4)
53
(1.50)
110
(3.11)
205
(5.80)
430
(12.2)
650
(18.4)
1220
(34.5)
1950
(55.2)
3450
(97.7)
7200
(204)
100
(30.5)
50
(1.42)
103
(2.92)
195
(5.52)
400
(11.3)
620
(17.6)
1150
(32.6)
1850
(52.4)
3250
(92.0)
6700
(190)
125
(38.1)
44
(1.25)
93
(2.63)
175
(4.96)
360
(10.2)
550
(15.6)
1020
(28.9)
1650
(46.7)
2950
(83.5)
6000
(170)
150
(45.7)
40
(1.13)
84
(2.38)
160
(4.53)
325
(9.20)
500
(14.2)
950
(26.9)
1500
(42.5)
2650
(75.0)
5500
(156)
175
(53.3)
37
(1.05)
77
(2.18)
145
(4.11)
300
(8.50)
460
(13.0)
850
(24.1)
1370
(38.8)
2450
(69.4)
5000
(142)
200
(61.0)
35
(0.99)
72
(2.04)
135
(3.82)
280
(7.93)
430
(12.2)
800
(22.7)
1280
(36.2)
2280
(64.6)
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.
8
PIPE INSTALLATION
Figure 4 - Pipe Installation, Standard Controls
1. Install the gas piping in accordance with applicable
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 (NFPA 54), National Fuel Gas Code; in
Canada, according to CSA 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
b. Manual "B" valve
c. Solenoid valve
d. Pressure regulator
Pipe directly into the combination valve (see Figure
4).
6. Gas valve has a pressure test post requiring a
3/32 in. hex head wrench to read gas supply and
manifold pressures. Open 1/4 turn counterclockwise
to read, turn clockwise to close and reseat. A 5/16 in.
ID hose fits the pressure post.
7. Provide a drip leg in the gas piping near the gas
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).
8. Make cer tain that all connections have been
adequately doped and tightened.
D3631C
Never use an open flame to detect
gas leaks. Explosive conditions may exist which
may result in personal injury or death!
The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system in excess of 1/2 psig
(3.5 kPa).
The appliance must be isolated from the gas supply
piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 psig (3.5 kPa).
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)
14.0 in. W.C. Max.
(3.5 kPa)
14.0 in. W.C. Max.
(3.5 kPa)
5.0 in. W.C. Min.
(1.2 kPa)
11.0 in W.C. Min.
(2.7 kPa)
Supply Inlet
Pressure
Do not over tighten the inlet gas
piping into the valve. This may cause stresses that
will crack the valve!
*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!
9
ELECTRICAL CONNECTIONS
Figure 5a Low-voltage
Thermostat Wiring
Single Stage
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
disconnect power before
servicing can cause severe
personal injury or death.
Figure 5b Low-voltage
Thermostat Wiring
Two Stage
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.
Do not use any tools (i.e. screwdriver,
pliers, etc.) across terminals to check for power. Use
a voltmeter.
Figure 5c Low-voltage
T834H or T834N
(or equivalent)
Thermostat Wiring
Single Stage
NOTICE: The start-up fan delay should not exceed
30 seconds from a cold start.
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.
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.
Should any high limit wires have to be replaced,
they must be replaced with wiring material having a
temperature rating of 200°C minimum.
THERMOSTAT WIRING AND LOCATION:
NOTICE: The thermostat must be mounted on a
vertical, vibration-free surface, free from air currents,
and in accordance with the furnished instructions.
Mount the thermostat approximately 5 ft. (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.
3. Dead Areas - Areas where the air cannot circulate
freely, such as behind doors or in corners.
10
ELECTRICAL CONNECTIONS (continued)
Figure 5d - Separated Combustion Tubular Units Equipped with Natural Gas and Propane (LP) Gas
11
ELECTRICAL CONNECTIONS (continued)
Figure 5e - Separated Combustion Tubular Unit Sizes with Optional 2 Stage Ignition
12
VENTING
ANSI now organizes vented
appliances into four categories.
Venting Categories
Negative
Vent
Pressure
Positive
Vent
Pressure
NonCondensing
Condensing
I
II
III
IV
Category I
Includes non-condensing
appliances with negative vent
pressure, like the traditional
atmospheric unit heater.
Category II
Groups condensing appliances
with negative vent pressure.
Category IV
Covers condensing appliances with
positive vent pressure.
NOTICE: Category II and IV do
not apply to equipment specified
within this manual.
Category III
Appliances are non-condensing
and operate with a positive vent
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 (NFPA 54), or applicable provisions of local
building codes. Refer to page 15 for Canadian installations. Refer to Figures 6A, 6B, 7A, 7B, 8A and 8B.
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).
Do not damper or add heat recovery devices to the flue piping. Failure to open such a damper prior to operating
gas unit will result in the spillage of flue gas into the occupied space.
VERTICALLY VENTED UNIT HEATERS (CATEGORY I)
4. Use as few elbows as possible.
Observe the following precautions when venting the unit:
1. Use flue pipe of the same size as the flue connections
on the gas unit heater (See Table #1). All heaters
should be vented with double wall or single wall vent,
a factory built chimney, or a lined brick and mortar
chimney that has been constructed in accordance
with the National Building Code. Type B vent should
only be used for vertical rise portions of a Category
I vent pipe system. Type B vent should not be used
for horizontal runs of vent pipe.
5. Seal all vent pipe joints and seams to prevent
leakage. Use General Electric RTV-108, Dow
Corning RTV-732, or equivalent silicone sealant
with a temperature rating of 500°F, or 3M #425
aluminum foil tape (or equivalent).
6. Avoid running vent pipe through unheated spaces.
7. When this cannot be avoided, insulate the pipe to
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 ft. (1.5m)
of vertical flue is required. The top of the vent pipe
should extend at least 2 ft. (0.61m) above the highest
point on the roof. Install a weather cap over the
vent opening. Consideration should be made for
anticipated snow depth.
8. Do not damper the flue piping. Failure to open such
a damper prior to operating the gas unit heater will
result in the spillage of flue gas into the occupied
space.
3. Slope horizontal runs upward from the gas unit
heater at least 1/4 in. 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 ft. (3m). Horizontal portions of the venting system
shall be supported at minimum intervals of 4 ft.
(1.2m). In Canada, support at minimum intervals of
3 ft. (1m).
13
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.
10. Vent connectors serving Category I and Category
II heaters shall not be connected into any portion of
mechanical draft systems operating under positive
pressure.
VENTING (continued)
HORIZONTALLY VENTED UNIT HEATERS
(CATEGORY III)
The vent terminal must be at least 12 in. (305mm) from
the exterior of the wall that it passes through to prevent
degradation of the building material by flue gases.
Horizontal venting arrangements are designed to be
used with single wall vent pipe. Horizontal venting
arrangements must terminate external to the building
using UL 1738 Listed and approved single wall or double
wall vent. For installations in Canada, use corrosion
resistant and gas-tight, listed vent pipe conforming with
local building codes, or in the absence of local building
codes, with current CSA-B149.1, Installation Codes for
Natural Gas Burning Appliances and Equipment or
CSA-B149.2, Installation Codes for Propane Gas
Burning Appliances and Equipment.
Through the wall vent for these appliances shall NOT
terminate over public walkways, or over an area where
the condensate or vapor could create a nuisance or
hazard or could be detrimental to the operation of
regulators, relief valves, or other equipment.
The vent pipe equivalent length must not exceed 50 ft.
(15.2m). Equivalent length is the total length of straight
sections PLUS 10 ft. (3.05m) for each 90° elbow and
4 ft. (1.22m) for each 45° elbow.
Do not use Type B (double wall)
vent internally within the building on horizontally
vented power vented units! This can result in
death, serious injury or substantial property
damage.
Maintain clearance between the vent pipe and combustible materials according to vent pipe manufacturer’s
instructions
Single wall and double wall venting components which
are UL 1738 Listed and approved for Category III positive
pressure venting systems MUST be used.
Seal all vent pipe joints and seams to prevent leakage.
Use General Electric RTV-108, Dow-Corning RTV-732
silicone sealant or equivalent sealant with a temperature
rating of 500°F; or 3M #425 aluminum foil tape (or
equivalent). The vent air system must be installed to
prevent collection of condensate. Pitch horizontal pipes
downward 1/4 inch per foot (21mm per meter) toward the
outlet for condensate drainage.
A Breidert Type L, Fields Starkap, or equivalent vent cap
must be supplied by the customer for each power vented
unit. The vent pipe diameter MUST be as specified in
Table 1 (“D” Dia. Flue Opening). All unit sizes are factory
equipped with the required flue size collar; attach in
place (if not mounted to outlet); refer to included vent
collar instruction sheet for additional requirements.
Horizontal portions of the venting systems shall be
supported at maximum intervals of 4 ft. (1.2m) to prevent
sagging (in Canada, support at 3 ft. (1m) maximum
intervals).
Table 5
Vent Systems
Termination Clearance Requirements
Insulate single wall vent pipe exposed to cold air or
running through unheated areas.
Minimum Clearance
for Termination Locations
Structure/Object
USA
CANADA
Door, window, or gravity vent
inlet; combustion air inlet for
other appliances
9 in. for 10,000 to
50,000 BTU/Hr
input; 12 in. for
input exceeding
50,000 BTU/Hr.
9 in. (230mm) for
10,000 to 50,000
BTU/Hr input; 12 in.
(305mm) for input
exceeding 50,000
BTU/Hr.
Forced air inlet within 10 ft.
3 ft. above
6 ft. (1.8m)
Adjoining Building or parapet
10 ft.
10 ft. (3.04m)
Adjacent public walkways
7 ft. above
grade
7 ft. (2.1m) above
grade
Electric, gas meters
& regulators
4 ft. horizontal
3 ft. (0.9m)
horizontally from
meter/regulator
asembly. 6 ft. (1.8m),
any direction, from
a gas service
regulator vent outlet
Above grade level*
1 ft.
1 ft. (0.3m)
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.
*Minimum above maximum snow depth, or per local code, whichever is
greater.
14
VENTING (continued)
NOTICE: Combustion and exhaust venting instructions below describe two-pipe venting. If venting
concentrically, a Combustion Air Inlet Kit is required and instructions included in the kit should be followed.
7. The equivalent length of the vent system must not
be less than 5 ft. and must not exceed 50 ft. (15.2m).
Equivalent length equals the total length of straight
pipe plus 10 ft. (3.05m) for each 90° elbow and 4 ft.
(1.22m) for each 45° elbow.
COMBUSTION AIR VENTING AND PIPING
Never operate unit heaters without
combustion air and flue gas piping in place or
severe personal injury or death may occur!
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).
NOTICE: For optimum performance keep the combustion air system as straight as possible.
1. The combustion air system installation must be
in accordance with the current National Fuel Gas
Code-NFPA 54 or ANSI Z223.1 National Fuel Gas
Code. In Canada, installation must be in accordance
with CSA-B149.1 “Installation Code for Natural Gas
Burning Appliances and Equipment” and CSA-B149.2
“Installation Code for Propane Burning Appliances
and Equipment”.
9. For horizontal combustion air systems longer than 5 ft.
(1.5m), the system must be supported from overhead
building structures at 3 ft. (1m) intervals.
8. Each slip joint must be secured with at least three
corrosion resistant screws. Two full turns of 3M #425
Aluminum Foil Tape or its equivalent must then be
used to seal each joint. General Electric RTV-108,
Dow-Corning RTV-732 or an equivalent may be used
instead of the tape.
EXHAUST VENTING
Never operate unit heaters without
combustion air and flue gas piping in place or
severe personal injury or death may occur!
2. A Breidert Type L or Fields inlet cap, furnished by the
customer, must be installed at the termination point
of the combustion air system, Figures 6A & 7A.
1. Vent system installation must be in accordance with
the current National Fuel Gas Code-NFPA 54 or
ANSI Z223.1 National Fuel Gas Code. In Canada
installation must be in accordance with CSA-B149.1
“Installation Code for Natural Gas Burning
Appliances and Equipment” and CSA-B149.2.
“Installation Code for Propane Burning Appliances
and Equipment”.
3. Each unit heater MUST have it’s own combustion
air system. It MUST NOT be connected to other air
intake systems.
4. Use UL 1738 Listed single wall pipe for the vent
system. For installations in Canada, use corrosion
resistant and gas-tight, listed vent pipe conforming
with local building codes, or in the absence of local
building codes, with current CSA-B149.1, Installation
Codes for Natural Gas Burning Appliances and
Equipment or CSA-B149.2, Installation Codes for
Propane Gas Burning Equipment.
2. A Breidert Type L or Fields vent cap, furnished by the
customer, must be installed at the termination point
of the vent system, Figures 6A & 7A.
3. Each unit heater MUST have it’s own vent system. It
MUST NOT be connected to other vent systems or
to a chimney.
Never use pipe of a diameter
other than that specified in Table 1, page 4! Never
use PVC, ABS or any other non-metallic pipe for
venting! To do so may result in serious damage
to the unit and or severe personal injury or death!
4. Use UL 1738 Listed single wall pipe. For installations
in Canada, use corrosion resistant and gas-tight,
listed vent pipe conforming with local building
codes, or in the absence of local building codes,
with current CSA-B149.1, Installation Codes for
Natural Gas Burning Appliances and Equipment or
CSA-B149.2, Installation Codes for Propane Gas
Burning Appliances and Equipment.
5. Long runs of single wall combustion air piping
passing through an unheated space may require
insulating if condensation becomes noticeable.
6. The combustion air system must be installed to
prevent collection of condensate. Pitch horizontal
pipes downward 1/4 in. per foot (21mm/m) toward the
inlet cap to facilitate drainage. Vertical combustion air
pipes should be piped as depicted in Figure 6A.
Never use pipe of a diameter
other than that specified in Table 1, page 4!
Never use PVC, ABS or any other non-metallic
pipe for venting! To do so may result in serious
damage to the unit and or severe personal injury
or death!
15
VENTING (continued)
5. Any run of single wall vent pipe passing through an
unheated space must be insulated with an insulation
suitable to 550°F (288°C).
9. For horizontal vent systems longer than 5 ft.
(1.5m), the system must be suppor ted from
overhead building structures at 3 ft. (1m) intervals.
6. The vent system must be installed to prevent
collection of condensate. Pitch horizontal pipes
downward 1/4 in. per foot (21mm/m) toward the vent
cap to facilitate drainage. Vertical vent pipes should
be piped as depicted in Figure 6A.
10. The exhaust vent system must remain at a minimum
distance of 6 in. (152mm) from all combustible
materials. Any part of the vent system that passes
through a combustible material must be properly
insulated.
7. The equivalent length of the vent system must not
be less than 5 ft. (1.5m) and must not exceed
50 ft. (15.2m). Equivalent length equals the total
length of straight pipe plus 10 ft. (3.05m) for each
90° elbow and 4 ft. (1.22m) for each 45° elbow.
NOTICE: Increasing the clearance distances may
be necessary if there is a possibility of distortion or
discoloration of adjacent materials.
For a VERTICAL vent pipe section that passes through
a floor or roof, an opening 4 in. (102mm) greater in
diameter is required (See Table 1, dimension “M”). The
opening must be insulated and flashed in accordance
with applicable installation codes. See Figure 7A.
8. Each slip joint must be secured with at least three
corrosion resistant screws. Two full turns of 3M #425
Aluminum Foil tape or its equivalent must then be
used to seal each joint. General Electric RTV-108,
Dow-Corning RTV-732 or an equivalent may be used
instead of the tape.
A HORIZONTAL section of an exhaust vent system that
passes through a combustible wall must be constructed
and insulated as shown in Figure 7B.
Figure 6A - Vertical Intake/Vent Installation
* 2 ft. minimum plus maximum snow depth for area.
** If excessive condensation develops, a drip
leg with a condensate drain may be required.
Insulating the pipes may eliminate the problem.
2764C
16
Figure 6B - Horizontal Intake/Vent Locations
CAT-2765C
Figure 7A - Vertical Vent Installation
D3620F
Figure 7B - Horizontal Vent Installation
D3619C
17
Figure 8A - Vertical Venting Requirements
D3662D
Figure 8B - Horizontal Venting Requirements
D3661F
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 CSA B149.1, Installation Codes for Natural
Gas Burning Appliances and Equipment, or CSA 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.
18
OPERATION
SEPARATED COMBUSTION TUBULAR PROPELLER UNITS
DIRECT SPARK IGNITION
EXPLANATION OF CONTROLS:
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.
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).
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 prepurge 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.
6. The fan operation is delayed 30 seconds once the
thermostat is closed, and continues operation for 30
seconds after the thermostat opens.
2. Open the manual valve on the unit heater.
3. Turn ON the electrical power.
4. The unit should be under the control of the thermostat.
Turn the thermostat to the highest point and determine
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.
2. Turn off the electricity.
3. To relight, follow “start-up” instructions.
See Figures 9-15 for parts/identification.
NOTICE: The start-up fan delay must not exceed 30
seconds from a cold start.
Figure 9
Direct Spark Ignition
System, Bottom View
19
OPERATION (continued)
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
Safety Information section for metric conversions).
2. PROPANE GAS: An exact manifold pressure of 10.0
in. 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.
3. The adjusted manifold pressure should not vary
more than 10% from pressure specified in Table 6.
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.
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.
3600 (Sec. per Hr.) X BTU/Cu. Ft.
Time (Sec.)
Table 6 - Main Burner Orifice Schedule*
*
INPUT
IN
1000
BTU
= Input Rate
100
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.
3600 x 1000
= 200,000
18
125
NOTICE: If the computation exceeds, or is less than
95% of the gas BTU/hr. input rating (see Table 1),
adjust the gas pressure.
300
150
175
200
250
350
400
Adjust the gas pressure as follows:
TYPE OF GAS
NATURAL
PROPANE
HEATING VALUE
1050 BTU/Ft3
2500 BTU/Ft3
(39.1 MJ/m3)
(93.1 MJ/m3)
3.5" W.C.
(0.87kPA)
10" W.C.
(2.49 kPA)
93
42
116
42
140
42
163
42
186
42
233
42
280
42
326
42
372
42
40
53
50
53
60
53
70
53
80
53
100
53
120
53
140
53
160
53
MANIFOLD
PRESSURE
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
ORIFICE DRILL
NO. OF
BURNER
ORIFICES
4
5
6
7
8
9
10
11
12
*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 in. 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:
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.
20
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 field derated to 90% of the normal altitude
rating, and be so marked in accordance with ETL certification. See Table 6A
for field deration information.
OPERATION (continued)
Table 6A
TUBULAR UNIT HEATER
HIGH ALTITUDE DERATION
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.
NATURAL GAS
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 AdjustmentsGas Input Rate for adjusting the manifold pressure.
PROPANE (LP) GAS
Altitude
(Feet)
Heating*
Value
BTU/Hr.
Manifold*
Pressure
(In. W.C.)
Heating*
Value
BTU/Hr.
Manifold*
Pressure
(In. W.C.)
2,000*
948
3.5
2,278
8.6
2,500*
931
3.5
2,237
8.5
3,000*
914
3.3
2,196
8.4
3,500*
897
3.2
2,156
8.4
4,000*
881
3.2
2,116
8.3
4,500*
865
3.2
2,077
8.2
5,000
849
3.1
2,039
8.1
5,500
833
3.1
2,000
8.0
6,000
818
3.0
1,964
7.9
6,500
802
3.0
1,927
7.7
7,000
787
2.9
1,891
7.6
7,500
771
2.9
1,853
7.5
8,000
756
2.8
1,817
7.4
8,500
741
2.8
1,781
7.2
9,000
726
2.7
1,745
7.1
9,500
711
2.7
1,709
6.9
10,000
696
2.6
1,673
6.8
*Notes:
1. Consult local utility for actual heating value.
2. Tables based on Natural Gas heating value of 1,050 BTU/Hr. at sea
level and Propane (LP) Gas heating value of 2,500 BTU/Hr. at sea
level.
3. For installations in Canada at altitudes of 2,000-4,500 ft.: adjust the
manifold pressure to 2.8 in. W.C. for Natural Gas and 8.1 in. W.C. for
Propane (LP) Gas.
21
Table 7 - Separated Combustion Tubular Propeller Troubleshooting Guide
SYMPTOMS
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
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.
1. Clean main burner ports.
2. Replace manifold assembly.
3. Refer to "Installation" clearances and venting
to ensure unit is properly mounted and vented.
4. Check gas input and manifold pressures.
4. Possibly over fired.
D. Floating flame.
1. Blocked venting.
2. Insufficient combustion air.
3. Blocked heat exchanger.
4. Air leak into combustion chamber
or draft hood.
1. Clean Flue. Refer to “Installation”.
2. Clean combustion air inlet openings.
3. Clean heat exchanger. Refer to “Installation”.
4. Determine cause and repair accordingly.
E. Gas odor.
1. Shut off gas supply immediately!
2. Leaking gas test port on valve.
3. Blocked heat exchanger.
4. Blocked draft hood.
5. Negative pressure in the building.
1. Inspect all gas piping and repair.
2. Check to ensure gas test ports are sealed.
3. Clean heat exchanger/flue. Refer to “Installation”.
4. Clean flue collector. Refer to “Installation”.
5. See “Installation”.
F. Delayed ignition.
1. Improper ground.
1. Check grounding wires and spark bracket
connections.
2. Inspect spark cable connections and cuts.
Replace if necessary.
3. Check to ensure spark is energized after
pre purge period.
4. Test and reset manifold pressure, refer to
“Operation”.
5. Clean or replace orifices.
6. Refer to “Installation”.
2. Bad or broken spark cable.
3. Faulty control.
4. Pressure regulator set too low.
5. Main burner orifices dirty.
6. Improper venting.
G. Failure to ignite.
1. Gas leak. Shut off gas supply immediately!
2. No power supply to unit.
3. Thermostat not calling.
4. Defective high limit.
5. Defective drafter prove switch.
6. Loose wiring.
7. Improper ground.
8. Improper thermostat or transformer wiring.
H. Condensation.
1. Improper venting.
2. Unit under fired.
1. Open all manual valves, check for leaks.
2. Turn on power supply, check fuses and
replace if bad.
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. Check switch operation to ensure
switch closes after draftor purge period.
If it does not make, check tubing
connections for blockage.
6. Check all wiring per diagram.
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.
1. Refer to “Installation, Venting”.
2. Check gas supply pressures to unit. Refer
to “Installation”.
3. Refer to “Installation”.
3. Building too cold.
22
Table 7 - Separated Combustion Tubular Propeller Troubleshooting Guide (continued)
SYMPTOMS
I. Burners will not shut off.
POSSIBLE CAUSE(S)
1. Thermostat located incorrectly.
2. Improper thermostat wiring.
3. Shorted circuit.
4. Defective/sticking gas valve.
5. Excessive gas supply pressure.
6. Defective thermostat.
7. Defective control board.
J. Rapid burner cycling.
1. Loose electrical connections at thermostat
or gas valve.
2. Excessive thermostat heat
anticipator setting.
3. Unit cycling on high limit.
4. Poor thermostat location.
CORRECTIVE ACTION
1. Relocate thermostat away from outside
wall or drafts.
2. Check thermostat circuit for open and close
on terminal strip on heater “R” and “W”.
3. Check thermostat circuit for shorts or staples
piercing wires.
4. Check for 24V on gas valve terminals when
thermostat is not calling.
5. Refer to “Installation”. "Gas Piping
Requirements".
6. If thermostat is calling after set point has
been satisfied, replace.
7. Check for 24V at terminals "R" and "W". If not
present and board is not in flash code mode,
replace board.
1. Tighten all electrical connections.
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 away from outside wall
or drafts.
K. Noisy power ventor.
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.
L. Fan will not run.
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.
2. Loose wiring or connection.
3. Control board is defective.
N. Fan will not stop.
1. Control Board is in flame failure mode.
2. Fan improperly wired.
3. Defective board.
O. Not enough heat.
1. Incorrect gas input.
2. Heater undersized.
3. Thermostat malfunction.
4. Heater cycling on limit.
5. Incorrect orifice sizes.
P. Too much heat.
1. Unit is over fired.
2. Thermostat malfunction.
3. Heater runs continuously.
23
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.
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.
1. Refer to “Operation”.
2. Is the heater output sized correctly for
heat loss of the space? Has the space
been enlarged?
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. Check orifice size, replace if undersized.
1. Refer to “Operation”. Check orifice size.
If too big replace.
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.
Table 7 - Separated Combustion Tubular Propeller Troubleshooting Guide
SYMPTOMS
Q. Cold air is delivered during
heater operation.
POSSIBLE CAUSE(S)
1. Incorrect manifold pressure or input.
2. Air throughput too high.
R. High limit tripping.
1. Unit is over fired.
1. Burner orifices may be too large, verify
and replace. Refer to “Gas Input Rate”.
2. Check for proper voltage, ensure fan
blade is correct.
3. Check operation of switch. If switch is open
during operation, check gas pressure; adjust
accordingly. If switch is open during start-up,
replace switch.
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.
2. Air flow is low.
3. Defective switch.
4. Defective control board.
S. Power ventor will not run.
1. Loose wiring or connections.
2. Motor overload is tripped or bad motor.
3. Defective control board.
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.
U. Power ventor will not stop.
CORRECTIVE ACTION
1. Refer to “Gas Piping Requirements”, test and
reset manifold pressure.
2. Refer to “Operation”.
1. Power ventor improperly wired.
2. Main burner did not light on call for heat.
3. Defective control board.
24
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.
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.
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.
Table 8 - Separated Combustion Tubular Propeller Troubleshooting with LED Indicator Assistance
No Cycling or appliance power
INDICATES
CHECK/REPAIR
LED STATUS
or thermostat call for heat
Slow Flash
Control OK, no call for heat.
Not Applicable
since appliance failure has
Fast Flash
Control OK, call for heat present.
Not Applicable
occured.
Line voltage power can
cause product damage,
severe injury or death.
Only a trained experienced
service technician should
perform this troubleshooting.
1. Check the system thermostat to make sure it is calling 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.
*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.
Steady Off
Internal control fault, or no power.
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.
Steady On
Control internal failure or bad ground.
1. Common side of transformer
grounded to chassis.
2. Loose spark ignitor.
2 Flashes
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.
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
Flame sensed while gas valve is off.
1. Flame probe miswired
or shortened.
6 Flashes
On-board microprocessors disagree.
1. Thermostat is interfering
with control board.
25
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.
4. With the burners removed, wire brush the inside
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. Inspect air inlet for blockage/debris. Clear if any
found.
7. Reassemble the unit heater by replacing all parts in
reverse order.
8. Check the burner adjustment.
9. Check all gas control valves and pipe connections for
leaks.
10. 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.
11. Inspect and service motor/fan assembly. To maintain
efficient air flow, inspect and clean the fan blades
and guard to prevent buildup of foreign matter.
12. Check motor lubrication. If oiling is required, add 1 or
2 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.
All Maintenance/Service information should be recorded
accordingly on the Inspection Sheet provided in this
manual.
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.
Gas tightness of the safety shutoff valves must be checked on at least an annual
basis. Failure to do so may result in death,
serious injury or substantial property damage.
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 in. pipe plug on
the inlet side of the combination control and connect
a manometer to that tapping. Turn the manual valve
on to apply pressure to the combination control. Note
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.
Should maintenance be required, perform the following
inspection and service routine:
Never over oil the motor or premature
failure may occur! Over oiling the motor may result
in minor injury or property damage.
1. Inspect the area near the unit to be sure that there is
no combustible material located within the minimum
clearance requirements listed in this manual.
13. 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.
26
LIMITED WARRANTY
Separated Combustion 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, flue collector, 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.
27
IDENTIFICATION OF PARTS
PROPELLER UNIT HEATERS
Figure 10 - Propeller Parts
Figure 11 - Component Parts
Fan Blade
Hanger Locations
Fan Guard
Flue
Flue Collector
Power Vent
Assembly
Motor
Hardware
Fan Motor
Baffle (Secondary)
Flame Sensor
Manifold Burner
Assembly
Hardware
Electrical Control
Panel Assembly
D4430
Fan Guard
Seperated Combustion
Burner Cover
Vestibule Panel/ Tube
Assembly
Collar
Ignitor
Grommet Bracket
Assembly
D9068
Sight Glass
Figure 12 - Heat Exchanger Assembly
Gas Valve
Figure 13 - Electrical Control Panel
Accordian Fastener
Pressure Switch
Power Venter
Connection
Transformer
Fan Motor
Connection
Control Board
Base
Terminal Block
D9064
28
Electrical Control
Panel Door
Figure 15 - Power Venter Assembly
(300/400 Unit Sizes Shown)
Figure 14 - Power Venter Assembly
(150/250 Unit Sizes Shown)
Figure 16 - 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.
• Unit Number
• Serial Number
• Part Description and Number as shown in Replacement parts Catalog
29
NOTES:
30
SEPARATED COMBUSTION TUBULAR PROPELLER
UNIT NUMBER DESCRIPTION
DIGIT
T
X
ITEM
X
X
–
PREFIX
1
2
UT
3
4
5
CA
6
7
8
9
10 11 12 13 14
FT FM GT AL GC SV MT MS
+
AS
(Internal Use Only)
Digit #1, 2 - Unit Type [UT]
Digit #12 - Motor Type [MT]
SF - Separated Combustion Tubular Propeller
1 - Open Drip Proof (Standard)
2 - Totally Enclosed
Digit #3, 4, 5 - Capacity [CA]
100 - 100,000 BTU/HR
Digit #13 - Blower Motor Sizes [MS]*
125 - 125,000 BTU/HR
150 - 150,000 BTU/HR
175 - 175,000 BTU/HR
0 - None/Not Applicable
*Note: Blower Motor Size [MS] not applicable for propeller type unit heaters.
200
250
300
350
- 200,000 BTU/HR
- 250,000 BTU/HR
- 300,000 BTU/HR
- 350,000 BTU/HR
400 - 400,000 BTU/HR
Digit #6 - Furnace Type [FT]
Digit #14 - Accessories [AS]
FACTORY INSTALLED
M6 - OSHA Type Fan Guard
P4 - Terminal Block Wiring
P6 - Summer/Winter Switch
S3 - 409 Stainless Steel Flue Collector
S5 - 304L Stainless Steel Burners
A - Right Side Access
Digit #7 - Heat Exchanger Construction Material [FM]
1 - Standard (Aluminized) Steel
† FIELD INSTALLED (AS-____ )
2 - 409 Stainless Steel
All Field Installed Accessories are to be entered as a separate line item using catalog
number which utilizes “AS” as a prefi x. i.e: A7 becomes AS-A7.
Digit #8 - Gas Type [GT]
N - Natural Gas
P - Propane Gas (LP)
A7 - Pressure Regulator 1/2-2 psi
P5 - 24V SPST Relay-Specify Purpose
Digit #9 - Altitude [AL]
G1 - 1-Stage T87K Mercury Free Thermostat
w/Subbase Kit
X2 - 30 Degree Downturn Nozzle
X3 - 60 Degree Downturn Nozzle
S - 0–4,999 ft.
T - 5,000–11,999 ft.
Note: Installations over 2,000 ft. require gas input deration in the field.
Refer to unit installation instructions.
G2 - 1-Stage T87K Mercury Free Thermostat
w/TG511A Guard Kit
G3 - 1-Stage T834N Mercury Free
Thermostat/Fan Switch
X4 - 90 Degree Downturn Nozzle
X5 - Vertical Louver Kit
X7-H5 - Horiz. Combustion Air Inlet Kit, 5 inch
Digit #10 - Direct Spark Gas Control [GC]
G5 - 2-Stage TH5220D Mercury Free
Thermostat w/Subbase
G6 - Locking Thermostat Cover
X7-H6 - Horiz. Combustion Air Inlet Kit, 6 inch
(Unit Capacity 300-400)
G8 - 1-Stage T6169C Line Voltage Stat
w/Subbase
G9 - 1-Stage T822K Mercury Free
Thermostat
X7-V5 - Vert. Combustion Air Inlet Kit, 5 inch
(Unit Capacity 100-250)
X7-V6 - Vert. Combustion Air Inlet Kit, 6 inch
(Unit Capacity 300-400)
1
2
3
4
5
- Single Stage
- Two Stage
- Electronic Modulation w/Room Sensing
- Electronic Modulation w/Duct Sensing
- Electronic Modulation w/Duct Sensing & Room Override Stat
6 - Electronic Modulation w/External 4-20 mA Input
7 - Electronic Modulation w/External 0-10 VDC Input
M2-2 - Vent Caps (5") (Unit Capacity 100-250)
M2-3 - Vent Caps (6") (Unit Capacity 300-400)
Digit #11 - Supply Voltage [SV]
1 - 115/1/60
2 - 208/1/60
5 - 230/3/60
6 - 460/3/60
3 - 230/1/60 7 - 575/3/60
4 - 208/3/60 Z - Special
Note: Supply Voltages [SV] 2-7 include field mounted step down transformer.
31
(Unit Capacity 100-250)
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:
_____________
Name Plate Amperage: _____________
Type of Gas:
Natural
Tank Capacity _______ lbs.
_______ kg
❐
❐
❐
❐
❐
❐
❐
❐
LP
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.)
GAS HEATING
With power and gas on.
GENERAL
With power and gas off.
❐
❐
❐
❐
❐
Make certain all packing has been removed.
Tighten all electrical terminals and connections.
Check damper linkages for tightness.
Check all fans & blowers for free movement.
Check all controls for proper settings.
FAN
With power and gas off.
❐
❐
❐
Rating: ______ BTU @ ____ °F
______ kw @ ____ °C
Check voltage L1___ L2___ L3___
Check rotation of main propellor(s).
Check motor amps L1___ L2___ L3___
❐
❐
❐
❐
❐
❐
❐
❐
❐
❐
❐
❐
Inlet gas pressure.
____ in. W.C. or ____ kPa
Burner ignition.
Manifold gas pressure. ____ in. W.C. or ____ kPa
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.
Combustion Reading:
Carbon Monoxide:____ PPM
Carbon Dioxide:____ %
_____________________________________________
__________________________________________________
__________________________________________________
Remarks: