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.

312A

SETUP SWITCHES

TWINNING AND/OR

LOW-HEAT ONLY AND

COMPONENT TEST

BLOWER OFF-DELAY

TERMINAL

ACRDJ - AIR CONDITIONING

RELAY DISABLE JUMPER

24-V-THERMOSTAT

TERMINALS

HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX.)

3-AMP FUSE

LED OPERATION & DIAGNOSTIC LIGHT

115-VAC (L2) NEUTRAL

CONNECTIONS

W2

OFF

OFF

12 ON

 

LHT

 

 

Y1

DLY

 

3

 

 

DHUM

 

 

 

G

 

 

 

24V

 

 

 

TEST/TWIN

ACRDJ

COMWW1

 

 

 

HUM

PLT

 

 

 

 

 

 

Y/Y2

 

 

 

0.5-AMP024 VAC

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

FUSE 3-AMP

 

 

 

T

 

 

SEC-1 SEC-2

 

S AT

 

E

 

U

 

 

 

 

S

 

 

 

L

 

 

 

 

 

 

D

 

C

 

 

PL1

E

 

 

 

 

 

 

O

 

 

 

 

EAC-2 NEUTRAL-L2

 

 

BLW

 

 

1

BHI/LORBHT/CLR

HI HEAT

D

BLWR

PL3 1

TRANSFORMER 24-VAC

CONNECTIONS

PL1 - LOW VOLTAGE MAIN HARNESS CONNECTOR

PL3

HI HEAT

 

 

 

IDR

HSIR

IDM

IHI/LOR

 

 

 

 

 

 

 

 

 

LO HEAT

LOHEAT

COOL

1-AMP@115 VAC

L1

1 PL2

 

 

 

 

 

 

 

 

 

EAC-1

 

 

 

 

SPARE-1 SPARE-2

PR-1

HSI

HI LO

 

 

 

 

 

 

 

 

 

SPARE-1

 

 

115-VAC (L1) LINE

 

PL2 - HOT SURFACE

 

SPARE-2 COOL

 

BLOWER SPEED

VOLTAGE CONNECTION

IGNITER & INDUCER

SELECTION TERMINALS

 

 

 

 

 

 

 

MOTOR CONNECTOR

EAC-1 TERMINAL

(115-VAC 1.0 AMP MAX.)

A02017

Fig. 34 - Furnace Control-PSC Blower Motor

26

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Bryant 120 instruction manual Accessories, Venting

120 specifications

The Bryant 120 is a remarkable system designed for residential and commercial heating and cooling needs, showcasing an impressive blend of efficiency, reliability, and advanced technology. As a part of Bryant's extensive line of HVAC solutions, the Bryant 120 stands out with its features and performance, making it an ideal choice for those seeking comfort year-round.

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