Loosen the screw on the heat terminal (typically marked ‘W’ or ‘W1’) and secure
one end of the resistor in the HVAC system’s Heat Relay Terminal by tightening the
terminal screw.
Connect the other end of the resistor to the 24V common return path. Two com-
pleted wiring examples are shown below.
4
5
Example 1
.
The first example (Figure 8) shows an HVAC system with a dedicated
24V Common screw terminal on the control board. The resistor simply spans be-
tween the Heat Relay Terminal (W) and the Common Terminal, providing a bypass
for some of the current that would otherwise pass through the heat relay circuit.
26
Figure 8. HVAC with Common Screw Terminal
Common Terminal
Bypass Resistor
Heat Relay
Terminal (W)
Summary of Contents for CCZ-T1-W
Page 1: ...Wireless Thermostat Installation Guide...
Page 4: ......
Page 29: ...25 Figure 7 Gas Electric Single Stage...
Page 34: ...30 Figure 10 Conventional Single Stage Wiring...
Page 35: ...31 Figure 11 Conventional Dual Stage Wiring...
Page 36: ...32 Figure 12 Heat Pump Single Stage Wiring...
Page 37: ...33 Figure 13 Heat Pump with Electric Auxilliary Heat Dual Stage Wiring...
Page 38: ...34 Figure 14 Millivolt Heat Conventional Cool Single Stage Wiring...
Page 39: ...35 Figure 15 Heat Pump with Electric Auxilliary Dual Stage Dual Transformer Wiring...
