Digital Monitoring Products SecureCom Smart Z-5010T, Installation And Programming Manual

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8 Z-5010T Installation and Programming Guide | Digital Monitoring Products, Inc.
Dual Transformer Systems
For HVAC systems with two dedicated 24 VAC transformers, one R wire runs from the
heating system (RH) and one runs from the cooling system (RC).
Connect the wires from the HVAC system to the corresponding terminals according to
the top labels on the thermostat terminal block. Connect the cooling system C wire to
the C terminal. Do not connect the C wire from the heating system. For systems with two
R wires (RC and RH), cut the internal RC/RH jumper on the back of the thermostat PCB.
Refer to Figure 6 and Figure 7.
STANDARD
HEAT PUMP
Y2
Y1 G RC RH C W1
W2
Y2
Y1 G R C R W1 O
Y2
C
onnect if
tw
o s
tage
sy
ste
m
C
onnect if
tw
o s
tage
sy
ste
m
C
ooling
Sy
ste
m
R wir
e
C
ooling
Sy
ste
m
R wir
e
Y1 G RC C RH W1 W2
Figure 6: Dual Transformer System Wiring