Lanair HI140i User Manual
Page 73
SECTION 20 HI-100i/HI-140i COMBUSTION
CHAMBER/HEAT EXCHANGER CLEANING
INSTRUCTIONS
Note: Whenever cleaning of the combustion chamber and heat exchanger are
required, proper protective clothing MUST BE WORN.
WARNING: DISCONECT ALL ELECTRICAL POWER TO HEATER BEFORE
SERVICING!
20.1 Turn thermostat to the lowest setting; the heater must be completely cool
before attempting to clean the heater (place the fan/limit on the manual
position to start the fan and shorten the cooling time if the unit is hot).
20.2 Turn off all power to the heater (120 VAC) at the main disconnect. Place the
fan/limit switch lever back into the auto position so the fan is off upon
restarting.
20.3 Remove the Burner. Remove the clean out cover from the right side of the
heater by removing (2) 1/4” hex head sheet metal screws. The heat
exchanger tubes can be inspected by removing one of the 1/4” screws, and
loosing the other, in the inspection ports. If more than 1/4” of ash is present
clean the heat exchanger tubes.
CLEAN OUT COVER
Page 52