Accessory List

T200 Series
222
© Copyright 2006 TAC. All Rights Reserved. F-27382-1
Figure 3 T204 Wiring to Cooling System With Single
Transformer.
Figure 4 T205 Wiring To Heating/Cooling System With
Single Transformer.
Figure 5 T205 Wiring To Heating/Cooling System With
Dual Transformer.
Figure 6 Terminal Identification.
24 VAC
TRANSFORMER
24 VAC
120 VAC
HEATING
RELAY
RH
W
Optional 250W 5 watt resistor is needed
only if power drops below 75 milliamps.
1
1
24 VAC HEATING
TRANSFORMER
24 VAC
120 VAC
FAN
RELAY
COOLING
RELAY
RC
RH
Y
W
G
B
O
HEATING
RELAY
REVERSING
VALVE
1
FACTORY
INSTALLED
JUMPER
2
1 Optional 250W 5 watt
resistor is needed only if
power drops below 75
milliamps.
Either the B or O output
will be connected to the
reversing valve. Terminal
A supplies 24V on a call
for cooling. Terminal B
supplies 24V on a call for
heat. Do not connect both.
2
24 VAC
TRANSFORMER
24 VAC
120 VAC
FAN
RELAY
COOLING
RELAY
RC
Y
G
Optional 250 Ohm 5 watt resistor is needed
onl
y
if power drops below 75 milliamps.
1
1
24 VAC HEATING
TRANSFORMER
24 VAC
120 VAC
FAN
RELAY
COOLING
RELAY
RC
RH
Y
W
G
HEATING
RELAY
1
2
FAC TO RY
INSTALLED
JUMPER
1 Optional 250W 5 watt
resistor is needed only if
power drops below 75
milliamps.
If one of the secondary
sides of both transformers
are grounded, grounded
sides must be connected
together.
2
24 VAC HEATING
TRANSFORMER
24 VAC
120 VAC
24 VAC COOLING
TRANSFORMER
120 VAC
FAN
RELAY
COOLING
RELAY
RC
RH
Y
W
G
HEATING
RELAY
2
2
FACTORY
INSTALLED
JUMPER
1 Optional 250W 5 watt
resistor is needed only if
power drops below 75
milliamps.
If one of the secondary
sides of both transformers
are grounded, grounded
sides must be connected
together.
2
1
DISPLAY
HEATING OPERATING
DIFFERENTIAL
HEAT CONTROL TIME DELAY
COOL CONTROL TIME DELAY
AUTO
FAN
CONTROL
RH
RC
W
Y
G
B
O
HC
TH