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Thomas & Betts FE - page 1
Mfg P/N 98807 Rev 8, Page 1 Belt T ension ............................................... 16 Blower/Filter Cabinet (Optional) ................... 22 Blower Motor ............................................ 16 Blower Rotation ........................................ 17 Blower Speed Adjustment ......................... 1 7 Bottom Access ............ ...
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Thomas & Betts FE - page 2
Form 436, Page 2 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 ...
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Thomas & Betts FE - page 3
Mfg P/N 98807 Rev 8, Page 3 3. Dimensions Fan-T ype, Power-V ented Unit Heater Suspension Notes: Use Dimension "G" for two-point suspension and "E" and "F" for four- point suspension. (T wo-point suspension is standard; four-point is op- tional. Four-point suspension is available either factory or field installed.) S i ...
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Thomas & Betts FE - page 4
Form 436, Page 4 3. Dimensions (cont'd) Blower-T ype, Power-V ented Unit Heater Dimensions (inches) Dimensions (mm) Size AB CD E F GH J K L Ha n g e r Na t P r o 25 756 344 1102 799 14 8 367 1559 102 261 406 13 13 50 756 344 1270 799 14 8 367 1559 102 261 406 13 13 75 756 395 1270 799 14 8 367 1559 102 267 406 13 13 100 ...
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Thomas & Betts FE - page 5
Mfg P/N 98807 Rev 8, Page 5 4. Uncrating and Preparation This unit was test operated and inspected at the factory prior to crat- ing 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 char- acteristics of the ...
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Thomas & Betts FE - page 6
Form 436, Page 6 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. Figure 2 - Suspension * When supplied with optional down ...
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Thomas & Betts FE - page 7
Mfg P/N 98807 Rev 8, Page 7 Figure 4A - Four-Point Suspension with Swivel Connections (Applies to both fan and blower models) Figure 4B - Suspension Dimensions (inches and mm) for Model BE Heater with Hanger Kit Option CK19 Figure 3 - T wo- Point Suspension with Swivel Connections (fan models only) W ARNING: Unit must be level for proper operation. ...
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Thomas & Betts FE - page 8
Form 436, Page 8 9. V enting (cont'd) V enter Outlet Attachment Requirements: • If the pipe used in the vent run is larger than the diameter of the venter outlet (See V ent Length T able 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 ins ...
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Thomas & Betts FE - page 9
Mfg P/N 98807 Rev 8, Page 9 Figure 6 - V ertical V ent T erminals Figure 7 - Horizontal V ent T erminals Horizontal V ent T erminal Clearances: The location of the termination of the hori- zontal 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 caus ...
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Thomas & Betts FE - page 10
Form 436, Page 10 10. Gas Piping and Pressures W ARNING This appliance is equipped for a maximum gas supply pressur e of 1/2 pound, 8 ounces, or 14 inches water column. Supply pressur e higher than 1/2 pound requir es installation of an additional service regulator external to the unit. PRESSURE TESTING SUPPL Y PIPING T est Pressures Above 1/2 PSI: ...
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Thomas & Betts FE - page 11
Mfg P/N 98807 Rev 8, Page 11 Before attempting to measure or adjust manifold gas pressure, the inlet (supply) pressure must be within the specified range for the gas being used both when the heater is in operation and on standby . Incorrect inlet pressure could cause excessive manifold gas pressure immediately or at some future time. Instructions t ...
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Thomas & Betts FE - page 12
Form 436, Page 12 TYPICAL WIRING DIAGRAMS -- Pages 12 - 15 CAUTION: If any of the original wire as supplied with the appliance must be replaced, it must be r eplaced with wiring material having a temperature rating of at least 105 o C, except for limit contr ol and sensor lead wires which must be 150 o C. See Hazard Levels, page 2. Field Control Wi ...
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Thomas & Betts FE - page 13
Mfg P/N 98807 Rev 8, Page 13 Blower-T ype, Power-V ented Model Sizes 25-100 with Intermittent Spark Pilot, Single-Stage Heating, Natural or Propane, Direct Drive M o d el S ize S p eed Use th e s e Two Motor Wire s 2 5 *Medi um *B l ue and Whi te L ow R ed a nd Whi te 5 0 *H i gh *B l ac k and Whi te Medi um B l ue a nd Whi te H i gh B l ac k and W ...
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Thomas & Betts FE - page 14
Form 436, Page 14 Blower-T ype, Power-V ented Model Sizes 50-250 with Intermittent Spark Pilot, Single-Stage Heating, Natural or Propane, Belt Drive (NOTE: Belt drive is standard on Sizes 125-250; optional on Sizes 50- 100.) ...
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Thomas & Betts FE - page 15
Mfg P/N 98807 Rev 8, Page 15 Blower-T ype, Power-V ented Model Sizes 165-400 with Intermittent Spark Pilot, Single-stage Heating, Natural or Propane, Belt Drive, Motor Contactor (NOTE: Motor contactor is standard on Sizes 300 and 400; optional on other sizes. ...
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Thomas & Betts FE - page 16
Form 436, Page 16 13. Fan Motor Fan motors are equipped with thermal overload protection of the auto- matic reset type. Should the motor refuse to run, it may be because of improper current characteristics. Make certain that the correct voltage is available at the motor . NOTE: If the unit is equipped with an optional totally enclosed motor , the h ...
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Thomas & Betts FE - page 17
Mfg P/N 98807 Rev 8, Page 17 15. Blower Speed Adjustment The blower speed may be adjusted to achieve the desired outlet tem- perature, as long as the adjustment is within the temperature rise and the static pressure limits shown on the heater rating plate. Direct drive motors are factory set as indicated in the chart below . Belt drive mo- tors are ...
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Thomas & Betts FE - page 18
Form 436, Page 18 Figure 14 - Air Shutter Adjustment Scr ews -- Alternate T urning Screws When Adjusting Shutter 19. Combustion Air Proving Switch The combustion air proving switch is a pressure sensitive switch that monitors air pressure to ensure that proper combustion air flow is avail- able. The switch is a single pole - normally open - device ...
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Thomas & Betts FE - page 19
Mfg P/N 98807 Rev 8, Page 19 24. Check Installation and Start-Up Check the installation prior to start-up: 5. Thermostat calls for heat, energizing the venter motor . 6. V enter pressure switch closes, firing the unit, after pilot prov- ing sequence. 7. Fan control senses heat exchanger temperature, ener gizing the fan or blower motor . 8. If the f ...
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Thomas & Betts FE - page 20
Form 436, Page 20 27. Optional Duct Flange - Option CD9 (Blower Models only) OPTIONAL EQUIPMENT This section contains a brief description of the more frequently specified field-installed options. All option packages include complete assembly and installation instructions. 25. Optional V ertical Louvers - Option CD1 The purpose of the addition of op ...
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Thomas & Betts FE - page 21
Mfg P/N 98807 Rev 8, Page 21 28. Optional Polytube Adapter - Options CD6, CD8, and CD1 1 (Blower Models only) Figure 17 - Polytube Adapter The polytube adapter option package does not include polytubing. Polytubing can be obtained from a supply distributor such as FOF Products, Inc., P . O. Box E, 1505 Racine Street, Delevan, WI 53115; ACME Enginee ...
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Thomas & Betts FE - page 22
Form 436, Page 22 29. Optional Guards - Options CD10 & CD12 (Blower Models only) These guard options are designed to provide complete pro- tection from the rotating drive and/or blower components. Option CD12 is designed for use with Sizes 25-100 with standard direct drive motor . This kit includes only the blower inlet guard. Option CD10 is de ...
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Thomas & Betts FE - page 23
Mfg P/N 98807 Rev 8, Page 23 SERVICE AND MAINTENANCE This unit will operate with a minimum of maintenance. T o ensure long life and satisfactory performance, a heater that is operated under nor- mal conditions should be inspected and cleaned at the start of each heating season. If the heater is operating in an area where an unusual amount of dust o ...
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Thomas & Betts FE - page 24
Form 436, Page 24 moval, Paragraph 32. The pilot can be removed to check the wiring, the spark gap, or to remove the orifice for cleaning. When the pilot is re-installed, be sure to include the pilot hole cover plate. Spark gap must be maintained to .100". (See Figure 29.) In the event the pilot flame is short and/or yellow , check the pi- lot ...
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Thomas & Betts FE - page 25
Mfg P/N 98807 Rev 8, Page 25 36. Heat Exchanger The outside of the heat exchanger can be cleaned from the front of the heater with an air hose and/or a brush. Remove all accumulated dust and grease deposits. The inner surfaces of the heat exchanger can be reached for cleaning with the burner rack removed. (See Paragraph 32.) Cleaning can be done wi ...
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Thomas & Betts FE - page 26
Form 436, Page 26 37. Fan (cont'd) Position the assembly on the heater . Attach the fan guard at the center mounts. ( IMPOR T ANT : If replacing the fan guard, use the screws that held the original fan guard. These specially designed screws will cut through the coating on the fan guard to provide a ground for the fan motor .) Rotate the fan bl ...
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Thomas & Betts FE - page 27
Mfg P/N 98807 Rev 8, Page 27 42. T roubleshooting TR O U B L E P R O B A B L E C A U S E R EM ED Y V e nt er mot or w ill no t st ar t 1. No pow er to u ni t. 1. T u rn on pow er , c hec k s u ppl y fu s es , or c i rcu i t b re ake r. I f u nit i s eq u i pped w i t h u nit -m o u n t ed d i scon n ect sw it ch , ch eck circu it b reak er (S ee P ...
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Thomas & Betts FE - page 28
Form 436, Page 28 FOR SERVICE OR REP AIR, FOLLOW THESE STEPS IN ORDER: FIRST : Contact the installer . Name _______________________________________________________________________________________ Address ________________________________________________________________________________________ _________________________________________________________ ...
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