Carrier 48XT-A 사용자 설명서
3
3. Turn off the electrical supply to the unit.
4. Remove the front access panel with a 5/16--in. nut driver.
5. Move the selector switch on the internal gas valve to the OFF
position and wait 5 minutes.
6. Move the selector switch on the internal gas valve to the ON
position.
7. Replace the front access panel.
8. Turn on the electrical supply to unit.
9. Open the external manual gas shutoff valve.
10. Set the temperature selector on UI slightly above room tem-
perature to start unit. The induced--draft combustion air fan
will start. Main gas valve will open and main burners should
ignite within 5 seconds. If the burner does not light within 5
seconds, the ignition module will go into a Retry Mode after
ignite within 5 seconds. If the burner does not light within 5
seconds, the ignition module will go into a Retry Mode after
a period of approximately 22 seconds (following the
5--second ignition period). If the burners do not light within
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
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 personal injury,
Failure to follow this warning could result in personal injury,
death, and/or property damage.
1. If the main burners fail to light, or the blower fails to start,
1. If the main burners fail to light, or the blower fails to start,
shut down gas heating section and call your dealer for service.
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 shutdown procedures, then call your dealer as soon
as possible.
!
WARNING
To Shut--off Unit Gas Heat:
FIRE,
EXPLOSION,
ELECTRICAL
SHOCK
HAZARD
Failure to follow this warning could result in personal injury,
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Do not turn off the electrical power to unit without first
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.
your dealer as soon as possible.
Should overheating occur or the gas supply fail to shut off, shut off
the external manual gas valve to the unit before shutting off the elec-
trical supply. Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the unit
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 following steps.
Refer to Fig. 5 while proceeding with the following steps.
1. Set the temperature selector on UI to lowest temperature set-
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. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
3. Turn off the electrical power supply to the unit.
4. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace the front access panel.
To Start Unit Electric Cooling:
Refer to Fig. 6 while proceeding with the following steps.
Refer to Fig. 6 while proceeding with the following steps.
1. Set the temperature selector on UI to highest temperature set-
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. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
3. Turn off the electrical power supply to the unit.
4. Remove the front access panel.
5. Move the selector switch on the internal gas valve to the OFF
position.
6. Replace the front access panel
7. Restore electrical power to the unit and set system switch to
7. Restore electrical power to the unit and set system switch to
COOL.
8. Set the temperature selector on UI slightly below the room
temperature to start unit.
To Shut Off Unit Electric Cooling:
Refer to Fig. 7 while proceeding with the following steps.
Refer to Fig. 7 while proceeding with the following steps.
1. Set the temperature selector on UI to highest temperature set-
ting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.