Heat Pump Hvac System Wiring - Ecolink Z-Wave TBZ500 Installation & Operation Manual

C*
O**
G
W Y
R
Factory installed RC and RH jumper.
Do not remove
Connect the wires as marked from the HVAC
system to the corresponding terminals on
the thermostat back.
*C wire (24VAC common) Heat Pump
systems usually have the C wire connected
to the thermostat. If there isn't a C wire,
batteries must be installed.
** O (Orange) or B (Brown) wire (changeover
valve) connect to the W2/O terminal on the
thermostat.
NOTE: Be sure to set the correct changeover
operation (O = changeover with Cool, B =
changeover with Heat) in the SETUP menu.
Connect the R wire to either RC or
RH terminal.
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TBZ500_manual_8_5x5_5_inch Combined_RDN1240221.indd 10

Heat Pump HVAC System Wiring

Single stage heating and cooling
Typical thermostat wiring colors.
Caution: verify that original wiring
matches. Colors may be different.
Note! If you get heating
when you expected cooling
or vice versa, change the
Change Over type to the
opposite setting.
Thermostat back
Heat Pump HVAC System
Thermostat connection
Blue
Red
White
Orange
Green
Yellow
Black/
brown
Factory installed RC/RH jumper
C 24VAC Common R
24VAC Return
W1 Aux Heat
O Changeover Valve
G Fan
Y1 Compressor Stage 1 Y2
Compressor Stage 2
Most Heat Pump
systems have the C wire
and the thermostat can be
power by the 24VAC from
the HVAC system.
Batteries are not required
for 24VAC powered systems.
If there is not a C wire
installed, the thermostat
MUST be powered from
batteries.
Connect the R wire to either
the RC or RH terminal.
DO NOT REMOVE THE
RC/RH JUMPER
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24-02-2021 18:55