10
240011511 REV. C [05/31/2017]
Annual Service By Contractor
• Inspect heat exchanger periodically and clean if necessary.
WARNING
Electrical shock hazard. Turn OFF electrical power
supply at service panel before service or maintenance
Failure to do so could result in death or serious injury.
!
• If cleaning is necessary, shut off oil supply, shut off power to
the furnace and remove burner.
• Remove cleanout cover and turbulators.
• Wire brush can be used to loosen dirt and debris on the
inside surfaces of heat exchanger. Clean out all accumulated
dirt, soot and debris with a wire handled brush and industrial
vacuum cleaner.
• Clean and reinstall turbulators.
• Before replacing cleanout cover, inspect gaskets. If gasket
is broken, remove remnants and replace with new gaskets.
Replace cleanout cover.
• Blower motor is factory oiled and permanently sealed. Do
not lubricate. Excess oil causes premature electric motor
failure.
• Inspect blower fan. Clean if necessary.
• Oil Burner Maintenance: Follow oil burner manufacturer
instructions.
•
Change oil burner nozzle and oil filter annually.
• Clean and inspect venting system for signs of deterioration
and leakage. Replace pitted or perforated vent pipe and
fittings.
• Barometric damper should open and close freely.
• Check electrical connections to ensure tight connections.
Safety controls such as the high limit controls should be
tested for functionality.
• Check fan control to ensure fan on and off delay function
continues to start and stop blower fan at optimal settings.
• Check operation of limit switch.
24. Operating Instructions (LRF)
Before Lighting
1.
Open all supply and return air registers and grilles.
WARNING
Fire, burn, explosion, asphyxiation hazard.
• Do not start burner when excess oil has
accumulated, furnace is full of vapor, or combustion
chamber is very hot.
• Do not burn garbage or paper in furnace.
• Do not leave paper or rags around furnace.
Failure to follow these instructions could result in death
or serious injury.
!
2.
Open all valves in oil pipes.
3.
Turn on electric power supply
To Light Unit
1.
Set thermostat above room temperature to call for heat.
Burner should start. It may be necessary to press RESET
button on primary combustion control relay.
2.
There is a fan on time delay before circulating fan is
energized. United Technologies 1158-120 has adjustable fan
on time set by selecting dipswitch combination displayed
in Chart 1. Fan on delay can be set at 30, 60, 90 or 120
seconds. Manufacturer recommended fan on delay is 30
seconds for LRF100 models and 60 seconds for LRF65/80/90
models.
3.
Set thermostat below room temperature. Oil burner stops.
4.
Air circulation blower continues to operate until time off
setting selected on electronic fan timer control times out.
United Technologies 1158-120 has adjustable fan off time
of 2, 3, 4 or 6 minutes. Manufacturer recommended fan
off delay is 2 minutes for all models. Fan timer control
adjustments may be altered if air at room registers is high
upon blower start up or shutdown.
5.
Restore thermostat setting to comfortable temperature.
NOTICE
If furnace is to be shut down for extended period of
time, close oil supply valve to burner.
To Shut Down Unit
1.
Set thermostat to lowest possible setting.
2.
Set manual switch (if installed) in electrical power supply line
to "OFF".
25. Operating Instructions (LRFV)
Before Lighting
1.
Open all supply and return air registers and grilles.
2.
Open all valves in oil pipes.
3.
Turn on electric power supply.
To Light Unit
1.
Set thermostat above room temperature to call for heat.
Burner should start. It may be necessary to press RESET
button on primary combustion control relay.
2.
There is a fan on time delay before circulating fan is
energized. United Technologies 1168-1 has adjustable fan
on/off time delay programmed into ECM motor, and is set
by selecting SW4 DIP switch combination displayed in Table
A-10. Adjust Fan on/off delay according to input (nozzle
size).
3.
Set thermostat below room temperature. Oil burner stops.
4.
Air circulation blower continues to operate until blower off
delay setting programmed into ECM motor times out.
5.
Restore thermostat setting to comfortable temperature.
NOTICE
If furnace is to be shut down for extended period of
time, close oil supply valve to burner.
To Shut Down Unit
1.
Set thermostat to lowest possible setting.
2.
Set manual switch (if installed) in electrical power supply line
to "OFF".
