Motor And Blower Wheel Check; Cleaning And Annual Maintenance; Replacing Parts; Installation Data - Space-Ray LTU SERIES Installation And Operation Instructions Manual

24.0)

MOTOR AND BLOWER WHEEL CHECK

If draft inducer motor fails to run: A) Check power supply to junction box. B) Check for loose or broken motor lead wire. C)
Check to see that blower wheel turns freely and is not rubbing housing. Blower wheel may have worked loose from shaft and
jammed against housing. D) Check for blower wheel damage; replace if necessary. If no damage, readjust blower wheel on
shaft & retighten set screw. E) If all above does not correct, replace motor.
25.0)

CLEANING AND ANNUAL MAINTENANCE

This heater 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 to the heater. 2)
Open the control box 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". ^ CAUTION: 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
pulled and can result in premature tube failure.
26.0)

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 28 for all
replacement parts.
27.0)

INSTALLATION DATA

Date of Installation:
Serial No.
Model: LTS or LTU
Form #43155260
Mar–05
# of Heaters in System:
i
–41–
N = Natural Gas
L = Propane Gas