Unit installation

DCN: 141-00885-16 1/26/06 TZ40 Thermostat Manual 31
TZ40 Wiring Diagram
RCS
Dipswitch SW1 Settings: (White is switch position)
SW1-S1, STANDARD OR HEAT PUMP SYSTEM SELECTION
SW1-S2 Fan or Change Over Valve Selection
HVAC Systems can be either Standard Gas/Electric systems or Heat Pump systems.
Set S1 to STD SYS (OFF) for Gas/Electric systems (default setting).
Set S1 to ON for Heat Pump systems
If S1 is set to Off for Standard HVAC systems, then S2 selects the HVAC fan type.
Set S2 to OFF for gas systems that do not require Fan w/heat calls.(default setting)
Set S2 to ON for electric systems.
If S1 is set to On for HP HVAC systems, then S2 selects the changeover or reversing valve type.
Set S2 to OFF for changeover with cooling (default setting).
Set S2 to ON for changeover with heating
C - 24VAC Common
THERMOSTAT CONNECTOR
W2/O* – Heat Stage2
W1 – Heat Stage 1
R - 24VAC Return
* for HP HVAC Systems
O=Changeover Valve
HVAC System Transformer:
Most central HVAC systems have a common heating and cooling transformer. This is the factory default
setting for Jumper JP1. In some cases, you may have separate heating and cooling systems, each with their
own transformer. In that case, cut Jumper JP1 and wire the heating transformer red wire to the RH terminal
and the cooling system transformer red wire to the RC terminal. Wire the cooling system’s 24VAC Com to
the control unit’s 24VAC Com terminal.
TS40
WALL DISPLAY UNIT
GND G
+12VDC +V
CLOCK C
DATA D
TZ40 CONTROL UNIT
Red
Green
White
Yellow
Orange
G – Fan
Y1 – Comp Stage 1
HVAC SYSTEM
HFRU REV P
24V RC
G
W1
Y1
W2 / O*
J4
24V RH
STATUS
HEAT1
HEAT2
CO
FAN
COMP1
COMP2
Y2 Black
SW1
1
OFF ON
HP STD
S2
2
Fuse
Mini ATO
2 Amp
Typical Thermostat wiring colors.
Cut Jumper
to split
Blue
HVAC SYSTEM
Y2 – Comp Stage 2
24V COM
JP1
RH=RC
RX/D -
TX/D +
GND
+12V
ZWBT-485
ZWave Thermostat
Adapter
Program
WDU
12V
GND
D
C
J1
J2
RS485
GND
D -
D +