Performing Routine Maintenance - Carrier 58UVB Owner's Manual

Fig. 17 - - Turn Off Electrical Supply
4. Remove main furnace door.
5. Turn control switch on the gas control to OFF position. See
Fig. 18.
SINGLE-STAGE GAS CONTROL
GAS CONTROL SWITCH
SHOWN IN "OFF" POSITION
Fig. 18 - - Control Switch to OFF
6. Replace main furnace door. See Fig. 19.
Fig. 19 - - Furnace Door Replaced
7. If the furnace is being shut down because of a malfunction, call
your dealer as soon as possible.
A92185
TWO-STAGE GAS CONTROL
A09600
A05100
CAUTION
!
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in unit component or
property damage.
Furnace is not to be installed, operated, and then turned off
and left turned off in an unoccupied structure during winter.
(See "Winterization" procedures in this manual.

PERFORMING ROUTINE MAINTENANCE

NOTE: The qualified installer or agency must use only
factory- -authorized replacement parts, kits, and accessories when
modifying this product.
Installing and servicing of heating equipment can be hazardous due
to gas and electrical components.
Only trained and qualified personnel should install, repair, or
service heating equipment. Untrained personnel can perform basic
maintenance functions such as cleaning and replacing air filters.
All other operations must be performed by trained service
personnel. Observe safety precautions in this manual, on tags, and
on labels attached to the furnace and other safety precautions that
may apply.
With proper maintenance and care, your furnace will operate
economically and dependably. Instructions for basic maintenance
are found on this and the following pages. However, before
beginning maintenance, follow these safety precautions:
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off electrical power supply to your furnace and
install lockout tag before removing the access doors to
service or perform maintenance.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Although special care has been taken to minimize sharp
edges, be extremely careful when handling parts or reaching
into the furnace. Wear safety glasses, gloves, and
appropriate protective clothing.
8