2
TO LIGHT UNIT
(Units with Electro-Mechanical Control)
See Fig. 1 for location of gas valve. Refer to Fig. 2 while
proceeding with the following steps.
Step 1 —
Set room thermostat to the lowest temperature
setting and set SYSTEM switch to OFF position.
Step 2 —
Close the shutoff valve on the gas supply piping.
Step 3 —
Turn off the electrical supply to the unit and
install lockout tag.
Step 4 —
Open the heat section access panel.
Step 5 —
Move ON/OFF switch on the internal main gas
valve to the OFF position and wait 5 minutes.
Step 6 —
Move ON/OFF switch on internal main gas valve
to ON position.
Step 7 —
Close the heat section access panel.
Step 8 —
Remove lockout tag and turn on the electrical
supply to unit.
Step 9 —
Open the shutoff valve on the gas supply piping.
Step 10 —
Set room thermostat selector slightly above
room temperature and set system switch to HEAT position to
start the unit. The induced-draft combustion air fan will start.
Main burners light within 30 seconds. Indoor blower will start
within 60 to 90 seconds of main gas ignition.
Step 11 —
Set the temperature selector on room thermostat
to desired setting.
TO LIGHT UNIT
(Units With
ComfortLink™ Control)
See Fig. 1 for location of gas valve. Refer to Fig. 3 while
proceeding with the following steps.
Step 1 —
Turn off the unit by using the Scrolling Marquee
to put the unit into Service Test mode. The Scrolling Marquee
is located on the front of the unit control box behind the control
box and compressor access door. Thermostat inputs and remote
network commands are ignored when Service Test mode is
ON.
a. A password may be required to change Service Test
values depending on previous settings configured in the
unit. Default password is “1111.”
b. Press the
key until a blank screen is shown.
c. Use the arrow keys to scroll the red LED on the display
to the “Service Test” position and press
.
d. The control will display the Field Service Test Mode
(TEST) setting. Press
once to select the TEST
setting for configuration. Press
again for
“OFF” to begin flashing.
e. Use the arrow keys to change the configuration from
“OFF” to “ON,” then press
and
to
save the setting.
Step 2 —
Close the shutoff valve on the gas supply piping.
Step 3 —
Turn off the electrical supply to the unit and
install lockout tag.
Step 4 —
Open the heat section access panel.
Step 5 —
Move ON/OFF switch on the internal gas valve to
the OFF position and wait 5 minutes.
Step 6 —
Move ON/OFF switch on internal gas valve to
ON position.
Step 7 —
Close the heat section access panel.
1. Do not turn off the electrical power to unit without
first turning off the gas supply.
2. Before attempting to start the gas heating section,
familiarize yourself with all the procedures that must
be followed.
3. Never attempt to manually light the burners on the
unit with a match, lighter, or any other flame. If the
electric sparking device fails to light the burners, refer
to the shutdown procedures, then call your dealer as
soon as possible.
If you do not follow these instructions exactly, a fire or
explosion may result, causing property damage, injury, or
loss of life.
If the main burners fail to light, or the blower fails to come
on, shut down gas heating section and call your dealer for
service. Failure to follow these requirements could result in
serious personal injury.
1. Do not turn off the electrical power to unit without
first turning off the gas supply.
2. Before attempting to start the gas heating section,
familiarize yourself with all the procedures that must
be followed.
3. Never attempt to manually light the burners on the
unit with a match, lighter, or any other flame. If the
electric sparking device fails to light the burners, refer
to the shutdown procedures, then call your dealer as
soon as possible.
If you do not follow these instructions exactly, a fire or
explosion may result, causing property damage, injury, or
loss of life.
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
INDUCED
DRAFT
MOTOR
COMBUSTION
FAN HOUSING
MAIN GAS
VALVE
MAIN BURNER SECTION
HEAT EXCHANGER
SECTION
Fig. 1 — Typical Gas Heating Section
Summary of Contents for 48PG03
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