Caution, Wiring diagrams, Troubleshooting – Carrier IDEALCOMFORT 58MVC User Manual

Page 11

115-VOLT FIELD-

SUPPLIED

FUSED

DISCONNECT

JUNCTION

BOX

CONTROL

BOX

24-VOLT

TERMINAL

BLOCK

THREE-WIRE

HEATING-

ONLY

FIVE

WIRE

NOTE 2

NOTE 1

1-STAGE

THERMOSTAT

TERMINALS

FIELD-SUPPLIED

FUSED DISCONNECT

CONDENSING

UNIT

FURNACE

COM

GND

FIELD 24-VOLT WIRING

FIELD 115-, 208/230-, 460-VOLT WIRING

FACTORY 24-VOLT WIRING

FACTORY 115-VOLT WIRING

Connect Y/Y2-terminal as shown for proper operation.

Some thermostats require a "C" terminal connection as shown.

If any of the original wire, as supplied, must be replaced, use

same type or equivalent wire.

208/230- OR

460-VOLT

THREE

PHASE

208/230-

VOLT

SINGLE

PHASE

WHT

BLK

WHT

BLK

A95236

W/W1

Y/Y2

NOTES: 1.

A95236

Fig. 15 -- Field Wiring

J. WINTERIZING

UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace

component damage.
Freezing condensate left in the furnace may damage the

furnace.

CAUTION

If the furnace will be off for an extended period of time in a
structure where the temperature will drop to 32_F (0_C) 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,

propylene glycol (RV, swimming pool antifreeze, or

equivalent) into funnel/tube until it is visible at point
where condensate enters open drain. (See Fig. 19.)

UNIT DAMAGE HAZARD
Failure of plastic components may occur.
Do not use ethylene glycol (Prestone II antifreeze/coolant or

equivalent automotive type).

CAUTION

6. Replace drain connection cap and clamp to inducer

housing.

7. Replace main furnace door.
8. Propylene glycol need not be removed before restarting

furnace.

WIRING DIAGRAMS

See Fig. 15, 16 and 21 for the Deluxe 4--Way Multipoise Furnace
wiring diagrams.

TROUBLESHOOTING

Use the troubleshooting guide, the status code LED on the
furnace control and the component test to isolate furnace

operation problems.
A more detailed troubleshooting guide is available from your
distributor.
For an explanation of status codes, refer to service label located
on back of main furnace door (See Fig. 20.)
The furnace control stores all status codes for a period of 72

hours, regardless of 115--v or 24--v power interruption.
NOTE: Removing blower access panel opens blower access
panel door switch and terminates 115--v power to furnace control.
Before removing blower access panel or turning off 115--v power,
look into blower access panel sight glass for current LED status.

1. To retrieve status code, proceed with the following:

NOTE: NO thermostat signal may be present at furnace control
and all blower time delay periods must be completed.

a. Leave 115--v power to furnace turned on.

b. Remove main furnace door.

c. Look into blower access panel sight glass for current LED

status code.

d. Remove blower access panel.

e. Turn setup switch SW1--1 to ON position. (See Fig. 16

or 21 for location.)

f. Manually close blower access panel door switch. Use a

piece of tape to hold switch closed.

58MV