Filter
Top Products
3
3. Turn off the electrical supply to the unit.
4. R emove the front access panel with a 5/16--in. nut driver .
5. MovetheselectorswitchontheinternalgasvalvetotheOFF
position and wait 5 minutes.
6. Movethe selectorswitch on the internalgas valvetotheON
position.
7. R eplace the front access panel.
8. Turn on the electrical supply to unit.
9. Open the external manual gas shutoff valve.
10. Set the temperatureselector on UI slightlyabove room tem-
perature to start unit. The induced --draft combustion airfan
willstart. Maingasvalvewillopen andmainburnersshould
ignitewithin 5 seconds. If the burnerdoes notlight within5
seconds,theignition modulewillgo intoaRetryModeafter
a period of approximately 22 seconds (following the
5--second ignition period). If the burners do not light within
15 minutes of the initial call for heat, there is a lockout.
11. Set the temperature selector on UI to desired setting.
Access Panels
Filter Access Panel
For Accessory Filter Rack
A09045
Fig. 2 -- Accessory Filter Rack Access Panel
Burners
Gas Valve
Flue Hood
A09043
Fig. 3 -- Gas Heating/Electric Cooling Unit with
Access Panel Removed
(Standard unit shown. Actual
appearance is shown in Fig. 2.)
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personalinjury,
death, and/or property damage.
1. If the main burners fail to light, or the blower fails to start,
shutdowngasheatingsectionandcallyourdealerforservice.
2. Never attempt to manually light the main burners on unit
with a match, lighter, or any other flame. If the electric
sparking device fails to light the main burners, refer to the
following shutdownprocedures,thencallyourdealerassoon
as possible.
!
WARNING
To Shut--off Unit Gas Heat:
FIRE, EXPLOSION, ELECTRICAL SHOCK
HAZARD
Failure to follow this warning could result in personalinjury,
death, and/or property damage.
Do not turn off the electrical power to unit without first
turning off the gas supply.
!
WARNING
Note:If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
Shouldoverheatingoccurorthegas supply fail to shutoff, shutoff
the external manualgasvalvetotheunitbeforeshuttingofftheelec-
trical supply. Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas control
which has been under water.
Refer to Fig. 5 while proceeding with the f ollowing steps.
1. S et thetemperatureselectoron UIto lowest temperatureset-
ting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. R emove the front access panel.
5. MovetheselectorswitchontheinternalgasvalvetotheOFF
position.
6. R eplace the front access panel.
To Start Unit Electric Cooling:
Refer to Fig. 6 while proceeding with the f ollowing steps.
1. SetthetemperatureselectoronUItohighesttemperatureset-
ting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. R emove the front access panel.
5. MovetheselectorswitchontheinternalgasvalvetotheOFF
position.
6. R eplace the front access panel
7. Restore electrical power to theunit and setsystem switch to
COOL.
8. Set the temperature selector on UI slightly below the room
temperature t o s tart unit.
To Shut Off Unit Electric Cooling:
Refer to Fig. 7 while proceeding with the f ollowing steps.
1. SetthetemperatureselectoronUItohighesttemperatureset-
ting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.