Install Instructions

Before
Before
After
After
Page 3 of 4 www.fast-stat.com
Thermostat
TR TH
THTR
Sender
Purple
Red
Black
White
Black
Purple
White
Gas Valve
R C
W
Thermostat
Cable
Thermostat
Cable
External Transformer
24V Transformer
TR TH
THTR
Gas Valve
External Transformer
24V Transformer
Thermostat
R W
Receiver
Common
Maker
Directly Connected Gas ValveD
Thermostat
Sender
Purple
Black
Red
White
Black
Purple
White
Thermostat
If a 24V transformer is not
accessible, a new transformer will
have to be installed at the location
of the Common Maker Receiver.
R C
W
Thermostat
Cable
Thermostat
Cable
Equipment
T
T
Control
EquipmentExternal Transformer
T
T
Control
R W
24V Transformer
Receiver
Common
Maker
Dry Contact Switching with External TransformerC