Page 24
Unit Start-Up
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
Do not use this furnace if any part has been underwater.
the furnace and to replace all gas controls, control
system parts, and electrical parts that have been wet or
to replace the furnace, if deemed necessary.
WARNING
CAUTION
Before attempting to perform any service or maintenance,
turn the electrical power to unit OFF at disconnect
switch..
BEFORE LIGHTING smell all around the appliance area
The gas valve on the ML180DFE unit is equipped with a
gas control switch. Use only your hand to move the switch.
Never use tools. If the switch will not turn or if the control
switch will not move by hand, do not try to repair it.
Placing the furnace into operation:
ML180DFE units are equipped with an automatic ignition
system. Do not attempt to manually light burners on these
furnaces. Each time the thermostat calls for heat, the
burners will automatically light. The ignitor does not get
hot when there is no call for heat on units with an automat-
ic ignition system.
WARNING
explosion may result causing property damage, personal
injury or death..
Gas Valve Operation (Figure 23)
1 - STOP! Read the safety information at the beginning
of this section.
2 - Set the thermostat to the lowest setting.
4 - This furnace is equipped with an ignition device
which automatically lights
5 - Remove the access panel.
6 - Move switch on gas valve to OFF. Do not force. See
smell gas, STOP! Immediately call your gas supplier
from a neighbor’s phone. Follow the gas supplier’s
instructions. If you do not smell gas go to next step.
GAS VALVE SHOWN IN ON POSITION
MANIFOLD
PRESSURE
OUTLET
PORT
INLET
PORT
PRESSURE
ADJUSTMENT
SCREW
Figure 23
8 - Move switch on gas valve to ON. Do not force. See
9 - Replace the access panel.
10- Turn on all electrical power to the unit.
11- Set the thermostat to desired setting.
NOTE - When unit is initially started, steps 1 through
11 may need to be repeated to purge air from gas
line.
12- If the appliance will not operate, follow the
service technician or gas supplier.
Turning O Gas to Unit
1 - Set the thermostat to the lowest setting.
be performed.
3 - Remove the access panel.
4 - Move switch on gas valve to OFF. Do not force.
5 - Replace the upper access panel.
Failure To Operate
If the unit fails to operate, check the following:
1 - Is the thermostat calling for heat?
2 - Are access panels securely in place?
3 - Is the main disconnect switch closed?
4 - Is there a blown fuse or tripped circuit breaker?
6 - Is gas turned on at the meter?
9 - Is the unit ignition system in lock out? If the unit locks
out again, call the service technician to inspect the
unit for blockages.
and outlet for blockages.
switches are tripped, call the service technician for
inspection.
To Next Page
Loading...
