Aprilaire 8800 Universal Installation Manual download pdf (Page 7)

CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS

A qualified HVAC technician should perform

this step to ensure proper termination.

1. Make sure the HVAC system power is off.

2. The Thermostat Installation Instructions

show wiring diagrams for several different

HVAC equipment types. Use FIGURES

3-5 as a reference only. Use color coding

where possible.

Refer to the thermostat installation manual

for check-out procedure and other wiring

details

DO NOT TURN ON THE HVAC

SYSTEM POWER YET!

JUMPER

OUTDOOR TEMP

SENSOR

1st HEATING

1st COOLING

FAN

2nd HEATING

2nd COOLING

NOT USED

NOT USED

TRANSFORMER

REMOTE TEMP

SENSOR

GY2YOBW

RC RH W2

S2R

CS

1T1T2A-B-A+B+

RSB RSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

THERMOSTAT IS POWERED

FROM 8819 OR 24VAC

TRANSFORMER

FIGURE 3 – Conventional Heat/Cool

SINGLE TRANSFORMER

(USE JUMPER WIRE)

2nd COMPRESSOR

2nd AUX HEATING

FAN

1st COMPRESSOR

1st AUX HEATING

OUTDOOR TEMP

SENSOR

JUMPER

REVERSING VALVE

HEAT PUMP

TRANSFORMER

REMOTE TEMP

SENSOR

OR

GY2YOBW

RC RH W2

S2R

CS

1T1T2A-B-A+B+

RSB RSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

THERMOSTAT IS POWERED

FROM 8819 OR 24VAC

TRANSFORMER

FIGURE 4 – Heat Pump

SINGLE TRANSFORMER

(USE JUMPER WIRE)

FIGURE 5 – Humidistat

NOTE: “O” is active

in cooling and “B” is

active in heating.

DRY CONTACT POWERED CONTACT

DEHUMIDIFIER

HUMIDIFIER

GY2YO

BW

RC RH W2

S2R

CS

1T1T2A-B-A+B+

RSB RSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

THERMOSTAT IS POWERED

FROM 8819 OR 24VAC

TRANSFORMER

DEHUMIDIFIER

HUMIDIFIER

HUMIDIFIER

TRANSFORMER

DEHUMIDIFIER

TRANSFORMER

GY2YO

BW

RC RH W2

S2R

CS

1T1T2A-B-A+B+

RSB RSA

COMMUNICATION

TERMINALS

SUPPORT

MODULE

THERMOSTAT IS POWERED

FROM 8819 OR 24VAC

TRANSFORMER

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