GVZC20 Service Manual

SERVICING

COOLING EMERGENCY MODE WIRING FOR TXV AP-

PLICABLE INDOOR UNIT

Cooling emergency mode is available when using a TXV

applicable indoor unit. To energize the blower at the appro-

priate speed, standard Legacy wiring is required. The im-

age below shows how the thermostat input terminals are to

be wired when selecting a cooling airow. Note: the blower

will run continuously with this wiring which is required. The

outdoor unit will cycle as described in the Cooling Emergen-

cy Mode section when appropriate dip switch modes are

set.

2 R

W1 W2

Y1 Y2

DEHUM

INDOOR UNIT INTEGRATED CONTROL MODULE

Note: Emergency heating mode is not available with TXV

applicable indoor units. If communications still exist be-

tween the indoor unit and thermostat, the thermostat should

be used to provide heating calls.