Thomas & Betts FE, BE User Manual
Installation and Operation ......................... Par . 1-23 .........Pages 1-18
Check Installation and Start-Up ................. Par . 24 .............. Page 19
Optional Equipment ..................................Par . 25-31 ....... Pages 20-22
Service/Maintenance/Troubleshooting.....Par. 32-42 ....... Pages 23-28
Index by Page
Belt Tension ............................................... 16
Blower/Filter Cabinet (Optional) ...................22
Blower Motor ............................................ 16
Blower Rotation ........................................ 17
Blower Speed Adjustment ......................... 17
Bottom Access ........................................... 23
Burners ................................................ 18, 23
Burner Air Adjustment .............................. 18
Burner Rack Removal ............................... 23
Carryover, Flash ........................................ 25
Check Installation and Start-Up ................ 19
Clearances.................................................... 5
Combustion Air Proving Switch ............... 1 8
Combustion Air ....................................... 5, 6
Confined Space Installation......................... 6
Dimensional Drawings ................................ 3
Disconnect Switch (Optional) ................... 11
Duct Flange (Blower Model Option) ........ 20
INSTALLATION FORM RGM 436 (Version A)
APPLIES TO: Installation/Operation/Service
Table of Contents
Electrical Supply and Connections............ 11
Fan Blade................................................... 25
Fan Control.......................................... 17, 26
Fan Motor .................................................. 16
Gas Piping and Pressures .......................... 10
Guard Options (Blower Model) ................ 22
Hanger Kits (Optional) ................................ 7
Hazard Intensity Levels ............................... 2
Heat Exchanger ......................................... 25
Ignition System.................................... 18, 24
Installation Codes ........................................ 2
Limit Control ....................................... 17, 26
Locating the Heater ..................................... 5
Louvers, Vertical (Optional)...................... 20
Maintenance .............................................. 23
Maintenance Schedule............................... 23
Multiple Heater Control Option ................ 22
Model FE and BE
Gas-Fired, Power-Vented
Unit Heaters
Obsoletes 436-5
Nozzles, Downturn Air (Optional) ............ 20
Optional Equipment .................................. 20
Operating Sequence................................... 19
Orifices, Burner and Pilot.......................... 25
Pilot ..................................................... 18, 24
Polytube Adapter
Service ....................................................... 23
Spark Gap .................................................. 24
Suspending the Unit .................................... 6
Thermostats ............................................... 11
Troubleshooting......................................... 2 7
Uncrating and Preparation........................... 5
Valve, Gas............................................ 18, 26
Venter Motor and Relay ............................ 26
Venting ................................................... 7, 26
Warranty ...................................................... 2
Wiring Diagrams ................................12-15
(Blower Model Option) ..... 21
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
WARNING: Gas-fired appliances are not
designed for use in hazardous atmospheres
containing flammable vapors or combustible
dust, in atmospheres containing chlorinated
or halogenated hydrocarbons, or in applications with airborne silicone substances. See
Hazard Levels, Page 2.
WARNING: Improper installation, adjustment, alteration, service, or maintenance can
cause property damage, injury or death. Read
the installation, operation, and maintenance
instructions thoroughly before installing or
servicing this equipment.
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.
GENERAL
Installation should be done by a qualified agency in accordance
with the instructions in this manual and in compliance with all
codes and requirements of authorities having jurisdiction. The
instructions in this manual apply to the unit heater models shown
on the right.
Model F u el Vent Air Delivery
FE
BE
G as-Fired Power Propeller Fan
Centrifugal Blower (heater
Gas -Fired Po wer
may be attached to
ductwor k)
Mfg P/N 98807 Rev 8, Page 1
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal injury or death and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury and/or property damage.
1. Installation Codes
The gas-fired unit heaters covered in this manual are design-certified
by the American Gas Association and approved by the Canadian Gas
Association for use with either natural or propane gas. The type of gas
for which your heater is equipped and the correct firing rate are shown
on the rating plate attached to your unit. Electrical characteristics are
shown on the motor nameplate and on the unit rating plate.
These units must be installed in accordance with local building codes.
In the absence of local codes, in the United States, the unit must be
installed in accordance with the National Fuel Gas Code (latest edition). A Canadian installation must be in accordance with the CAN/
CGA B149.1 and B149.2 Installation Code for Gas Burning Appliances and Equipment. These codes are available from CSA Information Services, 1-800-463-6727. Local authorities having jurisdiction
should be consulted before installation to verify local codes and installation procedure requirements.
Clearances from the heater and vent to combustible construction or
material in storage must conform with the National Fuel Gas Code
ANSI Z223.1a (latest edition) pertaining to gas-burning devices, and
such material must not attain a temperature over 160oF by continued
operation of the heater.
Special Installations (Aircraft Hangars/
Garages)
Installations in aircraft hangars should be in accordance with ANSI/
NFPA No. 409 (latest edition), Standard for Aircraft Hangars; in public garages in accordance with ANSI/NFPA No. 88A (latest edition),
Standard for Parking Structures; and for repair garages in accordance
with ANSI/NFPA No. 88B (latest edition), Standard for Repair Garages. ANSI/NFP A-88 (latest edition) specifies overhead heaters must
be installed at least eight feet above the floor. In Canada, installations
in aircraft hangars should be in accordance with the requirements of
the enforcing authorities, and in public garages in accordance with CAN/
CGA B149 codes.
ANSI/NFP A 409 (latest edition) specifies a clearance of ten feet to the
bottom of the heater from the highest surface of the top of the wing or
engine enclosure of whatever aircraft would be the highest to be housed
in the hangar, and a minimum clearance of eight feet from the floor in
other sections of aircraft hangars, such as the offices, and shops which
communicate with areas used for servicing or storage. The heaters must
be located so as to be protected from damage by aircraft or other objects such as cranes and movable scaffolding. In addition, the heaters
must be located so as to be accessible for servicing, adjustment, etc.
2. Warranty
Refer to limited warranty information on the warranty card in the
"Owner's Envelope".
WARRANTY: Warranty is void if......
a. Unit Heaters are used in atmospheres containing flammable
vapors or atmospheres containing chlorinated or halogenated
hydrocarbons or airborne silicone substances.
b. Wiring is not in accordance with the diagram furnished with
the heater .
c. Unit is installed without proper clearances to combustible ma-
terials or located in a confined space without proper ventilation and air for combustion. (See Paragraphs 6 and 7.)
d. Fan-type unit heater is connected to a duct system.
Form 436, Page 2
3. Dimensions
Fan-Type, Power-Vented Unit Heater
Dimensions (inches)
SizeABCDEFGHJKLMN
Nat Pro
29-25/32 13-9/16 27-1/16 31-7/ 16 5-27/32 14- 7/16 14-1/32 4 10-9/32 16 1/2 1/2 9-13/16 3
25
29-25/32 13-9/16 27-1/16 31-7/ 16 5-27/32 14- 7/16 14-1/32 4 10-9/32 16 1/2 1/2 9-13/16 3
50
29-25/32 15-9/16 27-1/16 31-7/ 16 5-27/32 14- 7/16 14-1/32 4 10-17/ 3 2 16 1/2 1/2 10-7/16 3
75
29-25/32 17-9/16 30-7/16 31-7/ 16 5-27/32 14- 7/16 14-1/32 4 12-29/ 3 2 16 1/2 1/2 10-7/16 3
100
29-25/32 23-5/16 30-7/16 31-7/ 16 5-27/32 14- 7/16 14-1/32 5 14-7/16 16 1/2 1/2 11-9/16 2-5/8
125
39-15/16 20-5/16 35-7/16 35-15/ 1 6 4-7/8 19-15/32 15-23/32 5 14-9/32 24 1/2 1/2 11-11/16 4- 1 9/32
165
39-15/16 23-5/16 36-3/16 35-15/ 1 6 4-7/8 19-15/32 15-23/32 5 14-13/32 24 1/2 1/2 11-11/16 4-19/ 32
200
39-15/16 28-13/ 1 6 36-3/16 35-15/1 6 4-7/8 19-15/32 15-23/32 5 12-11/ 32 24 1/2 1/2 11-11/16 4-19/ 32
250
39-15/16 28-13/ 1 6 36- 11/16 35-15/ 1 6 4-7/8 19-15/32 15-23/32 6 12-11/32 24 3/4 1/2 11-11/16 3-19/ 32
300
39-15/16 37-1/16 37-5/16 35-15/ 1 6 4-7/8 19-15/32 15-23/32 6 13 24 3/4 1/ 2 11-11/16 3-19/32
400
Dimensions (mm)
SizeABCDEFGHJKLMN
Nat Pro
25
50
75
100
125
165
200
250
300
400
756 344 687 799 148 367 356 102 261 406 13 13 249 76
756 344 687 799 148 367 356 102 261 406 13 13 249 76
756 395 687 799 148 367 356 102 267 406 13 13 265 76
756 446 773 799 148 367 356 102 328 406 13 13 265 76
756 592 773 799 148 367 356 127 367 406 13 13 294 67
1014 516 900 913 124 498 399 127 363 610 13 13 297 117
756 592 919 913 124 498 399 127 366 610 13 13 297 117
756 732 919 913 124 498 399 127 314 610 13 13 297 117
756 732 932 913 124 498 399 152 314 610 19 13 297 91
756 941 948 913 124 498 399 152 330 610 19 13 297 91
Suspension Notes: Use Dimension "G" for two-point suspension and "E" and "F" for four-
point suspension. (Two-point suspension is standard; four-point is optional. Four-point suspension is available either factory or field installed.)
Mfg P/N 98807 Rev 8, Page 3
3. Dimensions (cont'd)
Blower-Type, Power-Vented Unit Heater
Dimensions (inches)
Size
25
50
75
100
125
165
200
250
300
400
Size
25
50
75
100
125
165
200
250
300
400
Dimensions (mm)
Size
25
50
75
100
125
165
200
250
300
400
Form 436, Page 4
ABCDEF
29-25/32 13-9/16 43-3/8 31-7/16 5-27/32 14-7/16 61-3/8 4 10-9/32 16 1/2 1/2
29-25/32 13-9/16 50 31-7/16 5-27/32 14 -7/16 61-3/8 4 10-9/32 16 1/2 1/2
29-25/32 15-9/16 50 31-7/16 5-27/32 14 -7/16 61-3/8 4 10-17/32 16 1/2 1/2
29-25/32 17-9/16 50 31-7/16 5-27/32 14 -7/16 61-3/8 4 12-29/32 16 1/2 1/2
29-25/32 23-5/16 47-1/2 31-7/16 5-27/32 14-7/16 65-29/32 5 14-7/16 16 1/2 1/2
39-15/16 20-5/16 61 35-15/16 4-7/8 19-15/32 76-1/8 5 14-9/32 24 1/2 1/2
39-15/16 23-5/16 66-1/2 35-15/16 4-7/8 19-15/32 76-1/8 5 14-13/32 24 1/2 1/2
39-15/16 28-13/16 66-1/2 35-15/16 4-7/8 19-15/32 76-1/8 5 12-11/32 24 1/2 1/2
39-15/16 28-13/16 66-1/2 35-15/16 4-7/8 19-15/32 76-1/8 6 12-11/32 24 3/4 1/2
39-15/16 37-1/16 66-1/2 35-15/16 4-7/8 19-15/32 76-1/8 6 13 24 3/4 1/2
MNPRST U W
3-23/32 20-15/16 17-3/4 5-1/4 10-3/4 8-7/16 14-3/4 6-3/16 31-7/32 9-13/16 3
3-23/32 20-15/16 17-3/4 5-1/4 10-3/4 8-7/16 14-3/4 6-3/16 31-7/32 9-13/16 3
2-23/32 20-15/16 17-3/4 5-1/4 12-3/4 8-7/16 14-3/4 6-3/16 31-7/32 10-7/16 3
1-23/32 20-15/16 17-3/4 5-1/4 14-3/4 8-7/16 14-3/4 6-3/16 31-7/32 10-7/16 3
1-11/32 20-15/16 17-3/4 5-1/4 20-1/2 8-7/16 20-1/2 6-3/16 35-3/4 11-9/16 2-5/8
2-27/32 25-15/16 25-1/4 7-1/4 17-1/2 11-7/16 20-1/2 7-15/16 36-11/16 11-11/1 6 4-19/32
1-11/32 25-15/16 25-1/4 7-1/4 20-1/2 11-7/16 20-1/2 7-15/16 36-11/16 11-11/1 6 4-19/32
5-29/32 40-9/16 25-1/4 7-1/4 26 11-7/16 26 7-15/16 36-11/16 11-11/16 4-19/32
5-29/32 40-9/16 25-1/4 7-1/4 26 11-7/16 26 7-15/16 36-11/16 11-11/16 3-19/32
6-25/32 50-9/16 25-1/4 7-1/4 34-1/4 11-7/16 34-1/4 7-15/16 36-11/16 11-11/16 3-19/32
ABCDEF
756 344 1102 799 148 367 1559 102 261 406 13 13
756 344 1270 799 148 367 1559 102 261 406 13 13
756 395 1270 799 148 367 1559 102 267 406 13 13
756 446 1270 799 148 367 1559 102 328 406 13 13
756 592 1207 799 148 367 1674 127 367 406 13 13
1014 516 1549 913 124 495 1934 127 363 610 13 13
1014 592 1689 913 124 495 1934 127 366 610 13 13
1014 732 1689 913 124 495 1934 127 314 610 13 13
1014 732 1689 913 124 495 1934 152 314 610 19 13
1014 914 1689 913 124 495 1934 152 330 610 19 13
Hanger
Hanger
GH J K L
XYZ
Nat Pro
Hanger
GH J K L
Nat Pro
Size
25
50
75
100
125
165
200
250
300
400
MNPRST U W
94 532 48 1 133 273 214 375 157 793 249 76
94 532 48 1 133 273 214 375 157 793 249 76
69 532 48 1 133 324 214 375 157 793 265 76
44 532 48 1 133 375 214 375 157 793 265 76
34 532 48 1 133 521 214 521 157 908 294 67
72 659 64 1 184 445 291 521 202 932 297 11 7
34 659 64 1 184 521 291 521 202 932 297 11 7
150 1030 641 184 660 291 660 202 932 297 117
150 1030 641 184 660 291 660 202 932 297 91
172 1284 641 184 870 291 870 202 932 297 91
XYZ
Hanger
When equipped with optional blower cabinet.
When equipped with optional duct flange.
Dimension includes a 3/4" flange on the rear of the blower
cabinet.
NOTES
Use with 4-point suspension without blower cabinet. If
installing hanger kit Option CK19, suspension points
change; see Paragraph 8.
4. Uncrating and Preparation
This unit was test operated and inspected at the factory prior to crating and was in operating condition. If the heater has incurred any
damage in shipment, file a claim with the transporting agency.
Check the rating plate for the gas specifications and electrical characteristics of the heater to be sure that they are compatible with the
gas and electric supplies at the installation site. Read this booklet
and become familiar with the installation requirements of your particular heater. If you do not have knowledge of local requirements,
check with the local gas company or any other local agencies who
might have requirements concerning this installation. Before beginning, make preparations for necessary supplies, tools, and manpower.
Check to see if there are any field-installed options that need to be
assembled to the heater prior to installation. Each of the option packages includes a list of components and step-by-step instructions. For
a brief description of optional hanger kits, refer to Paragraph 8. For a
brief explanation of other frequently specified field-installed options,
see Paragraphs 25-31. After becoming familiar with the instructions,
assemble and install the options that are required for your heater.
If the heater was ordered with a vent cap shipped with the heater
(Option BT2), packaging depends on the size of the heater. Sizes 25
and 50 have the vent cap mounted on a shipping tube that is attached
to the venter housing. Remove the vent cap; remove and discard the
shipping tube. Sizes 100, 165, 200, 250, 300 and 400 have the vent
cap attached directly to the venter housing. Size 125 is shipped with
the vent cap mounted on the crate near the gas valve. Remove the
vent cap for field installation at the vent terminal.
Unless the crate bottom has been removed for option installation,
leave it attached until after the heater has been suspended. If the
crate bottom has been removed, the bottom of the heater must be
supported with plywood or appropriately placed boards. Without
adequate support, the bottom access panel could be damaged.
To protect the unit during shipping, the blower model has special
supports that must be removed before installation. Follow these instructions to remove:
oBlower Support Legs -- Remove the two blower support legs and
screws.
oMotor Shipping Block - Remove the wooden block located under
the motor bracket. Find the two rubber pads shipped in the instruction envelope. Place these pads on the ends of the motor
bracket bolts.
Use with 4-point suspension with blower cabinet.
Contactor is standard on Models 300 and 400; optional on other
sizes.
Contactor location with optional three phase motors on Sizes 50,
75, 100 and 125.
Deduct 6-5/8" on Sizes 50, 75, and 100 when equipped with
direct drive motor.
oMotor Shipping Plate -- Blower models that are equipped with motors
of 3/4 HP or less have a metal shipping plate attached between the
motor and the blower housing. Remove and discard the shipping plate.
Note: On units factory equipped with an optional belt guard, the belt
guard must be removed in order to reach the shipping plate.
5. Unit Heater Location
CAUTION: A void installing a unit heater in extremely
drafty areas. Extreme drafts can shorten the life of the
heat exchanger and/or cause safety problems.
For best results, the heater should be placed with certain rules in mind. In
general, a unit should be located from 8 to 12 feet above the floor. Units
should always be arranged to blow toward or along exposed wall surfaces, if possible. Where two or more units are installed in the same room,
a general scheme of air circulation should be maintained for best results.
Suspended heaters are most effective when located as close to the working zone as possible, and this fact should be kept in mind when determining the mounting heights to be used. However, care should be exercised
to avoid directing the discharged air directly on the room occupants.
Partitions, columns, counters, or other obstructions should be taken into
consideration when locating the unit heater so that a minimum quantity
of airflow will be deflected by such obstacles.
When units are located in the center of the space to be heated, the air
should be discharged toward the exposed walls. In large areas, units should
be located to discharge air along exposed walls with extra units provided
to discharge air in toward the center of the area.
At those points where infiltration of cold air is excessive, such as at entrance doors and shipping doors, it is desirable to locate the unit so that it
will discharge directly toward the source of cold air from a distance of 15
to 20 feet.
Units should not be installed closer than 18 inches from any wall.
CAUTION: Do not locate the heater where it may be
exposed to water spray, rain or dripping water.
6. Clearances & Combustion Air
Units must be installed so that the following clearances are provided for
combustion air space, service and inspection, and for proper spacing from
combustible construction.
Mfg P/N 98807 Rev 8, Page 5
6. Clearances and Combustion
Air (cont'd)
Model Required Clearances (inches and mm)
Size Top Flue Sides Bottom Rear
Collector
25-400 6"(152) 6"(152) 18"(457) 12"(305) * 24" (610)**
* When supplied with optional downturn nozzle, bottom clearance is
42"(1067mm). For service purposes, on standard units, bottom clearance exceeding minimum (12" or 305mm) is not required but may
be desirable.
** For servicing purposes only, rear must remain full open.
All fuel-burning equipment must be supplied with the air that enters
into the combustion process and is then vented to the outdoors. Sufficient air must enter the equipment location to replace that exhausted
through the heater vent system. In the past, the infiltration of outside
air assumed in heat loss calculations (one air change per hour) was
assumed to be sufficient. However, current construction methods utilizing more insulation, vapor barriers, tighter fitting and gasketed doors
and windows or weather-stripping, and mechanical exhaust fans may
now require the introduction of outside air through wall openings or
ducts.
The requirements for combustion and ventilation air depend upon
whether the unit is located in a confined or unconfined space. An "unconfined space" is defined as a space whose volume is not less than 50
cubic feet per 1000 BTUH of the installed appliance. Under all condi-
tions, enough air must be provided to ensure there will not be a negative pressure condition within the equipment room or space. For specific requirements for confined space installation, see Paragraph 7.
W ARNING: These power-vented unit heaters ar e
designed to take combustion air from the space
in which the unit is installed and are not designed
for connection to outside combustion air intake
ducts. Connecting outside air ducts voids the
warranty and could cause hazardous operation.
See Hazard Levels, Page 2.
7. Combustion Air Requirements
for a Heater Located in a
Confined Space
Do not install a unit in a confined space without providing wall openings leading to and from the space. Provide openings near the floor
and ceiling for ventilation and air for combustion as shown in Figure
1, depending on the combustion air source as noted in Items 1, 2, and
3 below the illustration.
Figure 1 Confined Space: A
space whose volume is
less than 50 cubic feet
per 1000 BTUH of the
installed appliance
input rating
Add total BTUH of all appliances in the confined space and divide by
figures below for square inch free area size of each (top and bottom)
opening.
1. Air from inside the building -- openings 1 square inch free area per
1000 BTUH. Never less than 100 square inches free area for each opening. See (1) in Figure 1.
2. Air from outside through duct -- openings 1 square inch free area
per 2000 BTUH. See (2) in Figure 1.
3. Air direct from outside -- openings 1 square inch free area per 4000
BTUH. See (3) in Figure 1.
NOTE: For further details on supplying combustion air to a confined
space, see the National Fuel Gas Code ANSI Z223.1a (latest edition ).
8. Suspending the Heater
Before suspending the heater, check the supporting structure to be used
to verify that it has sufficient load-carrying capacity to support the weight
of the unit.
Net Weight (lbs and kg)
Model Size
Type 25 50 75 100 125 165 200 250 300 400
Fan lbs 76 83 92 101 132 154 175 209 226 281
kg 34 38 42 46 60 70 79 95 103 127
Blower lbs 97 104 118 130 180 206 240 278 301 395
kg 44 47 54 59 82 93 109 126 137 179
NOTE: If the installation includes an optional stepdown transformer
kit (Option CF or CG), the stepdown transformer bracket is part of the
heater suspension and must be installed prior to hanging the heater.
Follow the instructions on the installation sheet included with the option kit.
A fan-type unit heater is equipped with standard two-point suspen-
sion. A 3/8-16 threaded hanger bracket assembly is located on each
side of the heater. If a fan-type unit has been ordered with optional,
factory-installed, four-point suspension (Option BJ6), it will have two
threaded hanger brackets on each side.
A blower-type heater is equipped with standard four-point suspen-
sion. Two 3/8-16 threaded hanger bracket assemblies are located on
each side of the unit. Each hanger bracket assembly is designed for
threaded rod attachment.
For both "standard" and "optional" suspension point dimensions, see
Dimension Tables in Paragraph 3. (Note: If installing Option CK19
hanger kit, suspension points change; see Figure 4B.)
WARNING: Suspend the heater only from the
threaded hanger brackets. Do not suspend from
the heater side panel.
When the heater is lifted for suspension, the bottom must be protected.
If the wooden crate bottom has been removed, the bottom of the heater
will have to be supported with plywood or other appropriately placed
material. If the bottom is not supported, the bottom access panel could
be damaged. Also, when lifting a blower unit, support the blower and
motor to prevent the unit from tipping.
All blower models have legs that support the blower assembly during
shipping. After
the unit is suspended, these
legs should be
removed.
Be sure that the
threaded hanger
rods are locked
to the heater as
shown in Figure
2.
Figure 2 -
Suspension
Form 436, Page 6
WARNING: Unit must be level for proper
operation. Do not place or add additional weight
to the suspended heater. See Hazard Levels, page
2.
If an optional downturn air nozzle is used, the unit must be suspended from four points to ensure level suspension. Two hanger
brackets are included in the downturn option package and must
be field-installed on fan-type units with standard two-point suspension. For additional information, refer to Paragraph 26 and
the instructions that are furnished with the option package.
When blower-type units are equipped with an optional blower/
filter cabinet, there are two suspension points on the blower cabinet hanger bar. Suspend a unit equipped with a blower/filter cabinet from four points, using the two heater hanger bracket assemblies closest to the front of the heater and the two suspension
points on the blower/filter cabinet.
If one of the optional, field-installed hanger kits has been ordered
for your heater, it will have been shipped separately . Each option
package includes a list of components and complete, step-by-step
assembly instructions.
Optional, Field-Installed Hanger Kits:
1) Four-Point Suspension (fan models only) - Option CK7
This option kit is designed to convert a fan-type heater from standard two-point suspension to four-point suspension. The kit contains two additional hanger brackets.
2) Two-Point Swivel Connectors (fan models only) - Option
CK8 (See Figure 3.)
The purpose of this option kit is to adapt the standard hanger
bracket so that the heater can be suspended from 1", threaded,
stationary pipe. The swivel connector screws "into" the threaded
hanger bracket on the heater and "onto" the 1" threaded pipe used
for hanging the heater. The kit includes two swivel hanger connector assemblies and two lock washers.
4) Four-Point Swivel Connectors - Option CK10 (See Figure 4A)
This option package is used on a heater that is already equipped with fourpoint suspension to adapt it for suspension from four 1", threaded, stationary pipes. The kit includes four swivel hanger connector assemblies and
four lock washers.
5) Special Four-Point Suspension with Nearly Equal Loading (applies
to blower models only) - Option CK19
This suspension option is designed for special applications when a suspension system is needed that has nearly equal loading at all four suspension
points. Use this option in installations with spring isolation designed for
seismic protection or when threaded rod hangers are longer than twelve
inches.
Suspension points change with the addition of hanger kit Option CK19; see
Figure 4B.
Figure 4B - Suspension Dimensions (inches and mm) for
Model BE Heater with Hanger Kit Option CK19
Size A B
25-50 11-7/8 (302) 9-1/8 (232)
75 13-7/8 (352) 11-1/8 (283)
100 15-7/8 (403) 13-1/8 (333)
125 21-5/8 (549) 18-7/8 (479)
165 18-5/8 (473) 15-7/8 (403)
200 21-5/8 (549) 18-7/8 (479)
250 27-1/8 (689) 24-3/8 (618)
300 27-1/8 (689) 24-3/8 (618)
400 35-3/8 (897) 32-5/8 (829)
Figure 3 - TwoPoint Suspension
with Swivel
Connections
(fan models
only)
3) Four-Point with Swivel Connectors (fan-models only) Option CK9 (See Figure 4A)
This option package is designed to convert a fan-type heater from
standard two-point suspension to four-point suspension with
swivel connectors. By installing this kit the standard fan-type heater
can be hung from four 1", threaded, stationary pipes. The kit includes two hanger bracket assemblies, four swivel hanger connector assemblies and four lock washers.
Figure 4A - Four-Point Suspension with Swivel
Connections (Applies to both fan
and blower models)
9. Venting
These power-vented unit heaters are designed to operate safely and efficiently with either a horizontal or vertical vent. (Horizontal vent run is recommended for maximum fuel savings.)
WARNING: Units installed in multiples require
individual vent pipe runs and vent caps. Manifolding
of vent runs is not permitted due to possible
recirculation of combustion products into the
building and possible back pressure effects on the
combustion air proving switch.
Specific Venting Requirements (read all before
installing)
1. Venter (Flue) Outlet
Venter Outlet Size:
Model Size Outlet Diameter
25-100 4" (102 mm)
125-250 5" (127 mm)
300-400 6" (152 mm)
Mfg P/N 98807 Rev 8, Page 7
9. Venting (cont'd)
Venter Outlet Attachment Requirements:
• If the pipe used in the vent run is larger than the diameter of the
venter outlet (See Vent Length Table 2), make the transition at
the venter outlet.
• A minimum of 12" of straight pipe is required at the venter
outlet (or transition fitting) before installing an elbow in the
vent system. An elbow should never be attached directly to the
venter. An elbow attached to the straight pipe can be in any
position at or above horizontal. See Figure 5.
Figure 5 - Alternate Vent
Directions (vent in any
position above horizontal;
minimum of 12" of straight
pipe
required
before
an
elbow)
2. Vent Pipe
If installed with a horizontal vent run, use either vent pipe approved
for a Category III heater or appropriately sealed 26-gauge galvanized steel or equivalent single-wall pipe.
If at least half of the equivalent length of the vent system is vertical, vent pipe approved for a Category I heater may be used. Singlewall pipe or double-wall (Type B) vent pipe are suitable for use
with a Category I heater.
Use only one of the flue pipe diameters listed in the Vent Length
Tables for the furnace size being installed.
2A. Vent Pipe Diameter Reduction
If at least half of the equivalent length of the vent system is vertical, the vent pipe diameter may be reduced one inch from the standard diameter listed in Vent Length Table 1. Only single-wall pipe
is suitable for use when reducing the pipe diameter. A taper-type
reducer must be used. The maximum allowable vent length remains
the same. If required, double wall pipe may be used at the terminal
end as shown in Figure 6. (Use the equivalent length for elbows as
shown in Vent Length Table 1 for the standard vent pipe diameter.
All elbows used in the vent system must be considered.)
3. Vent Length Tables
Table 1: Maximum Permissible Vent Lengths
V ent Pipe Maximum Equivalent Straight
Model Diameter Vent Length* Length** - ft (m)
-" (mm) - ft (m) 90o Elbows 45o Elbows
25 4"(102) 30 ft (9.1 m) 3.5' (1 m) 1.8' (.5 m)
50 4"(102) 40 ft (12.2 m) 5' (1.5 m) 2.5' (.8 m)
75 4"(102) 50 ft (15.2 m) 7' (2.1 m) 3.5' (1.1 m)
100 4"(102) 50 ft (15.2 m) 7' (2.1 m) 3.5' (1.1 m)
125 5"(127) 50 ft (15.2 m) 5' (1.5 m) .5' (.8 m)
165 5"(127) 50 ft (15.2 m) 9' (2.7 m) 4.5' (1.4 m)
200 5"(127) 50 ft (15.2 m) 8' (2.4 m) 4.0' (1.2 m)
250 5"(127) 50 ft (15.2 m) 10' (3.0 m) 5' (1.5 m)
300 6"(152) 50 ft (15.2 m) 11' (3.4 m) 5.5' (1.7 m)
400 6"(152) 50 ft (15.2 m) 15' (4.6 m) 7.5' (2.3 m)
Form 436, Page 8
T able 2: Optional Maximum Permissible Vent Lengths
(Requires an increase in vent pipe diameter.)
V ent Pipe Maximum Equivalent Straight
Model Diameter Vent Length* Length** - ft (m)
- " (mm) - ft (m) 90o Elbows 45o Elbows
100 5" (127) 60 ft (18.3 m) 8' (2.4 m) 4.0' (1.2 m)
165 6" (152) 60 ft (18.3 m) 10' (3.0 m) 5.0' (1.5 m)
200 6" (152) 60 ft (18.3 m) 12' (3.7 m) 6.0' (1.8 m)
250 6" (152) 70 ft (21.3 m) 8' (2.4 m) 4.0' (1.2 m)
300 7" (178) 70 ft (21.3 m) 13' (4.0) 6.5' (2.0 m)
400 7" (178) 90 ft (27.4 m) 14' (4.3) 7.0' (2.1)
*Note 1: If the system contains all vertical pipe or a combination of horizontal
and vertical vent pipe, the Maximum Permissible Vent Length shown in Tables 1
and 2 may be increased one foot for each foot vertical rise up to a maximum
increase of 10 feet for model sizes 25 thru 100 and up to 20 feet for model sizes
125 thru 400.
**Reduce the maximum vent length by the amount indicated for each elbow.
4. Vent System Joints
Vent system joints depend on the installation and the type of pipe being
used.
• If using single wall, 26-gauge or heavier galvanized pipe, secure slipfit connections using sheet metal screws or rivets. Seal pipe joints either with tape suitable for 550
o
F (such as Option FA1, P/N 98266) or
high-temperature silicone sealant.
• If using Category III vent pipe, follow pipe manufacturer's instructions
for joining pipe sections. When attaching Category III pipe to the venter outlet or the vent cap, make secure, sealed joints following a procedure that best suits the style of Category III pipe being used.
• If using double-wall (Type B) vent pipe (allowed only if 1/2 of the
equivalent vent length is vertical), follow pipe manufacturer's instructions for joining pipe sections. For joining double-wall pipe to the venter outlet collar, single-wall pipe, and/or the vent cap, follow the instructions below.
Instructions for attaching double-wall (Type B) vent pipe to the venter outlet, a single-wall pipe run, or to the vent cap (use these instructions for either full length double-wall or terminal only):
Hardware and Sealant Required: 3/4" long sheetmetal screws; and a tube of RTV
1) Look for the "flow" arrow on the vent pipe; attach according to the arrow.
Slide the pipe so that the venter outlet, the single-wall pipe, or the vent cap is
inside the double-wall pipe.
2) Drill a hole through the pipe into the outlet collar, the single-wall pipe, or the
vent cap. (Hole should be slightly smaller than the sheet metal screw being used.)
Using a 3/4" long sheet metal screw, attach the pipe. Do not overtighten. Repeat,
drilling and inserting two additional screws evenly spaced (120o apart) around
the pipe.
3) Use RTV to seal any gaps. If there is an annular opening, run a large bead of
RTV in the opening. The bead of RTV must be large enough to seal the opening,
but it is not necessary to fill the full volume of the annular area.
5. Vent System Support
Support lateral runs every six feet, using a non-combustible material such
as strap steel or chain. Do not rely on the heater for support of either horizontal or vertical vent pipe
6. Condensation
Single wall vent pipe exposed to cold air or run through unheated areas
must be insulated. Where extreme conditions are anticipated, install a means
of condensate disposal.
7. Vent Terminal (Pipe and Vent Cap)
The vent system must be terminated with a suitable vent cap that is the
same size as the vent run.
Heaters installed in Canada must be equipped with the vent cap sup-
plied as optional equipment by the heater manufacturer (Option CC1 or
Option BT2). Heaters installed in the United States must be equipped
with the heater manufacturer's vent cap, a Type L Breidert Air-x-hauster
vent cap, or equivalent. Use of a vent cap supplied by the pipe manufac-
®
turer is not permitted; the vent cap must be the type approved for use
with this heater. A different style vent cap could cause nuisance problems or unsafe conditions.
See the illustrations in Figures 6 and 7 for requirements of both vertical and horizontal vent termination. The vent terminal section may be
Figure 6 - Vertical Vent Terminals
either single-wall or double-wall (Type B) vent pipe. If double-wall
pipe is used in the vent terminal with a single-wall vent run, follow the
instructions in No. 4, V ent System Joints, to attach the vent cap and to
connect the double-wall pipe to the single-wall vent pipe run.
Figure 7 - Horizontal Vent Terminals
Horizontal V ent Terminal Clearances:
The location of the termination of the horizontal vent system must be in accordance with
National Fuel Gas Code Z223.1. Required
minimum clearances are listed on the right.
Products of combustion can cause discoloration of some building finishes and deterioration of masonry materials. Applying a clear
silicone sealant that is normally used to protect concrete driveways can protect masonry
materials. If discoloration is an esthetic problem, relocate the vent or install a vertical vent.
Structure Minimum Clearances for V ent Termination
Location (all directions unless specified)
Forced air inlet within 10 ft (3.1m) 3 ft (0.9m) above
Combustion air inlet of another appliance 6 ft (1.8m)
Door, window, or gravity air inlet 4 ft (1.2m) horizontally
(any building opening) 4 ft (1.2m) below
3 ft (0.9m) above
Electric meter, gas meter * and relief equipment 4 ft (1.2m) horizontally
Gas regulator * 3 ft (0.9m)
Adjoining building or parapet 6 ft (1.8m)
Grade (ground level) 7 ft (2.1m) above
*Do not terminate the vent directly above a gas meter or service regulator.
Mfg P/N 98807 Rev 8, Page 9
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