Checking Heat Tape Operation (If Applicable); Winterizing - Carrier Deluxe 58MVB Service And Maintenance Instructions

The electrical ground and polarity for 115- -v wiring must be
maintained properly. Refer to Fig. 15 for field wiring information
and to Fig. 21 for unit wiring information.
2-5/32˝
Fig. 14 --- Igniter
NOTE: If the polarity is not correct or furnace is not properly
grounded, the STATUS LED on the furnace control will flash
rapidly and prevent the furnace from operating. The control
system also requires an earth ground for proper operation of the
furnace control and flame sensor.
The 24- -v circuit contains an automotive- -type, 3- -amp fuse
located on the furnace control. (See Fig. 16.) Any direct shorts of
the 24- -v wiring during installation, service, or maintenance will
cause this fuse to blow. If fuse replacement is required, use ONLY
a fuse of identical size. The furnace control LED will flash status
code 24 when fuse needs to be replaced.
With power to the unit disconnected, check all electrical
connections for tightness. Tighten all screws on electrical
connections. If any smoky or burned connections are found,
disassemble the connection, clean all parts, strip wire, and
reassemble properly and securely.
Reconnect electrical supply to unit and observe unit through 1
complete operating cycle and check for proper operation.
Step 8—Checking Heat Tape Operation
(If Applicable)
In applications where the ambient temperature around the furnace
is 32_F or lower, freeze protection measures are required. If this
application is where heat tape has been applied, check to ensure it
will operate when low temperatures are present.
NOTE: Heat tape, when used, should be wrapped around the
condensate drain trap and drain line. There is no need to use heat
tape within the furnace casing. Most heat tapes are temperature
activated, and it is not practical to verify the actual heating of the
tape. Check the following:
1. Check for signs of physical damage to heat tape such as
nicks, cuts, abrasions, gnawing by animals, etc.
2. Check for discolored heat tape insulation. If any damage
or discolored insulation is evident, replace heat tape.
3. Check that heat tape power supply circuit is on.
!
UNIT AND PROPERTY DAMAGE
Failure to follow this caution may result in furnace
component failures or water property damage.
If this furnace is to be operated in an unconditioned space
where the ambient temperatures may be 32_F or lower,
freeze protection
CONDENSATE
Installation, Start- -up, and Operating Instructions. (See Fig.
17.)
Step 9—Winterizing
!
UNIT DAMAGE HAZARD
A04181
Failure to follow this caution may result in furnace
component damage.
Freezing condensate left in the furnace may damage the
furnace.
If the furnace will be off for an extended period of time in a
structure where the temperature will drop to 32_F or below,
winterize as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door.
3. Disconnect upper inducer housing drain connection cap
from inducer housing. (See Fig. 18.)
4. Connect field- -supplied 1/2- -in. I.D. inducer housing tube
to upper inducer housing drain connection.
5. Insert funnel in tube and pour one quart of antifreeze, pro-
pylene glycol (RV, swimming pool antifreeze, or equiva-
lent) into funnel/tube until it is visible at point where con-
densate enters open drain. (See Fig. 19.)
10
CAUTION
measures must be taken.
DRAIN PROTECTION section
CAUTION
See
of