312a – Bryant 2-stage Deluxe Induced-Combustion 4-way Multipurpose 120 User Manual

Page 26

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26

ACCESSORIES

1. Electronic Air Cleaner (EAC)

Connect an accessory Electronic Air Cleaner (if used)

using 1/4--in female quick connect terminals to the two
male 1/4--in quick--connect terminals on the control board

marked EAC--1 and EAC--2. The terminals are rated for
115VAC, 1.0 amps maximum and are energized during

blower motor operation. (See Fig. 34.)

2. Humidifier (HUM)

Connect an accessory 24 VAC, 0.5 amp. maximum

humidifer (if used) to the 1/4--in male quick--connect
HUM terminal and COM--24V screw terminal on the

control board thermostat strip. The HUM terminal is
energized when gas valve relay (GVR) is energized. (See
Fig. 34.)

NOTE: A field--supplied, 115--v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.

NOTE: DO NOT connect furnace control HUM terminal to
HUM (humidifier) terminal on Thermidistat, Zone Controller or
similar device. See Thermidistatt, Zone Controller, thermostat,
or controller manufacturer’s instructions for proper connection.
VENTING
The furnace shall be connected to a listed factory built chimney

or vent or a clay--tile lined masonry or concrete chimney. Venting

into an unlined masonry chimney or concrete chimney is
prohibited. When an existing Category I furnace is removed or

replaced, the original venting system may no longer be sized to
properly vent the 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, and spillage of combustion products into

the living space.

LHT

OFF

DLY

ON

OFF

W2

BLW

24-V-THERMOSTAT

TERMINALS

SETUP SWITCHES

LOW-HEAT ONLY AND

BLOWER OFF-DELAY

TWINNING AND/OR

COMPONENT TEST

TERMINAL

ACRDJ - AIR CONDITIONING

RELAY DISABLE JUMPER

TRANSFORMER 24-VAC

CONNECTIONS

PL1 - LOW VOLTAGE MAIN

HARNESS CONNECTOR

PL3

HUMIDIFIER TERMINAL

(24-VAC 0.5 AMP MAX.)

3-AMP FUSE

LED OPERATION &

DIAGNOSTIC LIGHT

115-VAC (L2) NEUTRAL

CONNECTIONS

PL2 - HOT SURFACE

IGNITER & INDUCER

MOTOR CONNECTOR

115-VAC (L1) LINE

VOLTAGE CONNECTION

EAC-1 TERMINAL

(115-VAC 1.0 AMP MAX.)

BLOWER SPEED

SELECTION TERMINALS

HI HEAT

LO HEAT

SPARE-1

SPARE-2 COOL

Y1
DHUM

G
COM

24V

WW1

Y/Y2

R

TEST/TWIN

HUM

1 2 3

PL

T

A

CRDJ

0.5-AMP024 VAC

FUSE 3-AMP

SEC-1

SEC-2

PL1

NEUTRAL-L2

1

EAC-2

BHT/CLR

BHI/LOR

PL3 1

BLWR

COOL

SPARE-1

SPARE-2

1-AMP@115 VAC

EAC-1

PR-1

IDR

HSIR

IDM

IHI/LOR

PL2

1

HSI HI LO

STATU

S

COD

EL

E

D

HI HEA

T

LO HEA

T

L1

A02017

Fig. 34 -- Furnace Control--PSC Blower Motor

312A

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