User's Manual
10
Do not split RC/RH for Heat Pump systems! Single-stage: 1 Heat / 1 Cool
Figure 11. Heat pump HVAC system wiring
2-wires system with 1 heat only
Do not split RC/RH for Heat Pump systems!
For heat pump output, there is a 3 minutes off time for heat pump protection!
Figure 12. Heat pump 2-wires HVAC system wiring
Yellow
W1
W2
O
B
G1
G2
Y1
Y2
C
RC
RH
Black (with C-Wire)
Red
Yellow
O - Cool changeover (heat pump)
B - Heat changeover (heat pump)
G - Fan
Y - Compressor (Heat/Cool)
C - 24Vac Common
R - 24Vac Power
Heat Pump HVAC System
Blue
Orange
ZTS
-
500U
Green
RC and RH are
internal short!
W1
W2
O
B
G1
G2
Y1
Y2
C
RC
RH
Y - Compressor (Heat)
R - 24Vac Power
ZTS
-
500US
(Powered by batteries)
Red
RC and RH are
internal short!
Heat Pump System
Typical wire colour
Typical wire colour
No C-wire