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LTU SERIES I & O - 24 Pages

30) MOTOR AND BLOWER WHEEL CHECK
If draft inducer motor fails to run: A) Check power supply to junction boa. BlCheckfoi loose or broken motor lead wire. C) Ctieck to see that blower wheel turns freely and is not rubbing housing. Blower wheel may have worked loose from shaft and jammed against housing. Dl Check for blower wheel damage: replace If necessary. If no damage, readjust blower wheel Dn shaft & retlghten set screw. E) If all above does not correct, replace motor.
31) CLEANING AND ANNUAL MAINTENANCE
This neater must be cleaned and serviced annually before the start of each heating season and at any time excessive accumulation of dust and dirt is observed. Maximum heating efficiency and clean combustion will be maintained by keeping the heater clean. To clean the heater, follow these instructions: 1) Turn off all electrical and gas supply lo the heater. 2) Open the control bo* access panel. 3] Clean the access panel, the inside of the control box, the emitter tube and the reflector panels. (Dirty reflectors will reduce output.) 4) visually Inspect the spark electrode. Remove any foreign objects from electrode tip. Set the spark gap to the proper value of 3/16". ICAUTIOH: The ceramic portion of the electrode Is very fragile so any cleaning or adjustments must be done with care. 5) Disconnect the vent stack and remove any foreign material that may have collected on the blower wheel. Make sure the blower wheel is clean. A dirty wheel can reduce the volume of air
33) INSTALLATION DATA
32) REPLACING PARTS_
Ensure that at all times when parts are being replaced, both gas and electrical supplies are disconnected. Various parts are available from the factory for replacement by a licensed person. Refer to the Replacement Parts Guide In Section 34 for all replacement parts.
REPLACEMENT PARTS GUIDE
MODELS: LTS40-175 and ITUS0-175
DRAFT INDUCER COMPONENTS
42917010 [03723020 :03977120
Plastic Vacuum Air Tube, 12" long Blower Housing Sub-Assembly Motor Plate Sensing Tube Bracket Sensing Tube, Draft Inducer Motor Spacer (4 per motor) 3/8" Connector
30347000 03868010 30186072 30267000 30279000 302S1000
Air Switch Kit, <
0.37" Y
■6" Knockout Plug
Transformer, AT120B1051
Terminal Block, EK-204
Terminal Block, TFB-323
Terminal Block Shield
Monitoring Light, Green
Strain Relief
Sensing Tube, Air Switch
Junction Boi
Junction Bos Cover
Junction Box Support Bracket
SIO Cable Assembly
Motor, JB1R061N
Braided Fiber Glass Sleeving, 4" Lg
Draft Inducer Gasket
Connection Wire Diagram (noi shown)
42709000 30220010 02175040 42B86000 42909000 42910000 42911000 42923000 03721000 03979000 43221000 42874000
42741040 Restrict
42741030 Restile:
42741020 Restili?
42741010 Restrict
42741060 Restile
42741060 Restile
42741070 Restile
42741080 Restrie
42741090 Restrict
1" i.D. (40W Btu/nr) 1-1/8" i.D. (50MBtu/hr) 1-7/32" I.D. (60M Btu/hr) 1-7/16" I.D. (75M Btu/hr) 1-1/2- I.D. (SOM Si 90M Btu/hr) 1-5/a-I.D. (100M BHVhr) 1-3/4- I.D. (110M Si 120M Btu/hr) 1-7/B- I.D. (125M Si 130M Btu/hr) 3-1/32" I.D. (140M&150MBtu/hrJ 2-1/4" I.D. (1S0M & 175M Blu/ni)
LTU SERIES I & O
  1. P. 1

  2. P. 15

    SINGLE HEATER VENTING (VERTICAL THROUGH THE ROOF) 1. When venting the heater to outside of building through a roof, use single-wall metal pipe....
  3. P. 16

    2. Material for connectors should be constructed of galvanized sheet metal or other approved noncombustlble corrosion resistant material as allowed...
  4. P. 17

    24) AIR FOR COMBUSTION If Indoor combustion air Is to be supplied for a tlghlly enclosed area, one square Inch of free area opening shall...
  5. P. 18

    > STEP 3: CHECK SPARK IGNITION CIRCUIT. AWARNING: THE IGNITION CIRCUIT GENERATES A 20,000 VOLT OPEN CIRCUIT AND ELECTRICAL SHOCK CAN RESULT.a) Check...
  6. P. 19

    REPEAT PROCEDURE LI
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  8. P. 21

    MODELS: LTS40-175 and LTU80-175 CONTROL COMPONENTS ITEM NO. PART NO. DESCRIPTION 10 03868010 3/8" Connector 28 42874000...
  9. P. 22

    CONTROL COMPONENTS iCOnt,nUe0) MODELS; LTS40-175 end LTL80-175 ...
  10. P. 23

    LTS BODY COMPONENTS MODELS: LTS40-175 1 02266010 Reflector Speed Clip...
  11. P. 24

    SPACE-RAY.A Division of Gas-FIrtd Products, Inc.Post Office Box 36485 (28236) 305 Doggett Street (28203) ■ Charlotte, North Carolina Phone (704)372-3485...
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