Bryant 345MAV User Manual

Page 22

Accessories

1. Electronic Air Cleaner (EAC)

Two quick-connect terminals marked EAC-1 and EAC-2
are provided for EAC connection. (See Fig. 33.) These
terminals are energized with 115v (1.0-amp maximum)
during blower motor operation.

2. Humidifier (HUM)

A quick-connect terminal (HUM) and screw terminal (C

24v) are provided for 24-v humidifier connection. (See Fig.
26.) HUM terminal is energized with 24v (0.5-amp maxi-
mum) After the inducer pre-purge period. (HK42FZoB
Control Board)

NOTE:

A field-supplied, 115-v controlled relay connected to

EAC terminals may be added if humidifier operation is desired
during blower operation.

VI.

VENTING

The 345MAV Furnaces require a dedicated, (one 345MAV fur-
nace only) sealed vent system. All air for combustion is taken from
the area adjacent to furnace, and all flue gases are discharged to
outdoor atmosphere.

Removal of Existing Furnaces from

Common Venting Systems

When an existing Category I furnace is removed or replaced, the
original venting system may no longer be sized to properly vent
the remaining attached appliances. An improperly sized Category
I venting system could cause the formation of condensate in the
furnace and vent, leakage of condensate and combustion products,
spillage of combustion products into the living space, etc.

Fig. 30—Typical Heating and Cooling Application Wiring Diagram

A02174

115-V FIELD-

SUPPLIED

DISCONNECT

AUXILIARY
J-BOX

24-V

TERMINAL

BLOCK

THREE-WIRE

HEATING-ONLY

FIVE WIRE

NOTE 1

NOTE 2

FIELD-SUPPLIED
DISCONNECT

CONDENSING
UNIT

TWO
WIRE

FURNACE

C
O
N

R
O

COM

GND

FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING

208/230- OR
460-V
THREE
PHASE

208/230-V
SINGLE
PHASE

BLOWER DOOR SWITCH

WHT

BLK

WHT

BLK

NOTES:

Connect Y-terminal in furnace as shown for proper blower 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.

GND

THERMOSTAT
TERMINALS

1.
2.
3.

Fig. 31—Relocating J-Box

A00212

FACTORY
INSTALLED
LOCATION

ALTERNATE

FIELD

LOCATION

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