Maytag Ventilation Systems HRV-210 User Manual download pdf (Page 24)

8.0

Installation of the Controls (con’d)

W R G

HRV CONTROL CONNECTOR

THERMOSTAT

TERMINALS

FOUR

WIRES

I OC OL Y R G BF F

TWO WIRES

heating only

FURNACE

24-VOLT

TERMINAL BLOCK

TWO WIRES

COOLING SYSTEM

VE0010A

Standard furnace interlock wiring

8.3 ELECTRICAL CONNECTION TO OPTIONAL CONTROLS

1 4 7

2 5 8

3 6 9

MAIN PC BOARD

PUSH-BUTTON SWITCHES

(5 switches maximum)

VE0036A

REAR VIEW

8.4 ELECTRICAL CONNECTION TO THE FURNACE

WRGY

*FURNACE INTERLOCK

RELAY

NC NO

COM

THERMOSTAT

TERMINAL

Unit Control Module

4 WIRES

2 WIRES

heating only

wiring

nuts

FURNACE

24-VOLT

TERMINAL BLOCK

2 WIRES

COOLING SYSTEM

GRAY BROWN

RED

GREEN

BLUE

9-PIN AMP PLUG

*FURNACE INTERLOCK RELAY, PART # 12658

VE0009A

Alternate furnace interlock wiring

For a furnace connected to cooling system:

On some older thermostats, energizing the “R” and “G” terminals at the furnace has the effect of energizing

“Y” at the thermostat and thereby turning on the cooling system. If you identify this type of thermostat, you

must use the “alternate furnace interlock wiring”. An additional control relay will then have to be installed.

WARNING

010

Never connect a 120-volt AC circuit to the terminals of the furnace interlock (standard wiring). Only

use the low voltage class 2 circuit of the furnace blower control.

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Maytag Ventilation Systems HRV-210 User Manual Page 24

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