Step 10 — Set room thermostat selector slightly above room temperature and set system switch to HEAT position to start the unit. The
Step 11 — Set the temperature selector on room thermostat to desired setting.
INDUCED |
DRAFT |
MOTOR |
COMBUSTION |
FAN HOUSING |
MAIN GAS |
VALVE |
HEAT EXCHANGER | MAIN BURNER SECTION |
SECTION |
C06258
Fig. 1 - Typical Gas Heating Section
!WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death, and/or property damage.
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.
TO LIGHT UNIT
(UNITS WITH COMFORTLINKt
CONTROL)
!DANGER
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death, and/or property damage.
1.Do not turn off the electrical power to unit without first turning off the gas supply and applying lockout tags.
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.
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.
NOTE: A password may be required to change Service Test values, depending on previous settings configured in the unit. Default password is “1111.”
a.Press the ESCAPE key until a blank screen is shown.
b.Use the arrow keys to scroll the red LED on the display to the “Service Test” position and press ENTER.
c.The control will display the Field Service Test Mode (TEST) setting. Press ENTER once to select the TEST setting for configuration. Press ENTER again for “OFF” to begin flashing.
d.Use the arrow keys to change the configuration from “OFF” to “ON,” then press ENTER 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.
Step 8 — Remove lockout tag and turn on the electrical supply to unit.
NOTE: Normal operation will automatically begin. Service Test mode will automatically end (exit) after a recycle of power.
Step 9 — Open the shutoff valve on the external gas supply piping.
Step 10 — To test the operation of the gas section, the HEAT submenu of Service Test may be used. See the Controls,
Step 11 — For normal operation, make sure that the set points are at the normal heat set points.
!WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death, and/or property damage.
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.
48PD, 48PG
3
