System information

DCN: 141-01070-03 TR40 Thermostat Manual 31
RCS
TR40 THERMOSTAT
WIRING DIAGRAM
WDU
+V
GND
DATA
CLK
GND G
+12VDC +V
CLOCK C
DATA D
TR40 WALL DISPLAY UNIT
J1
PWR TRANSFORMER
J4
RS232/485
J3
SW1
CO C/H
1
2
3
4
STD/HP
FAN/HEAT
S4
STATUS
12VDC
JACK
Typical thermostat
wiring color codes
DIPSWITCH SW1 Setting the HVAC system configuration.
OF
F
-
ON
HVAC SYSTEM
RED
GREEN
WHITE
YELLOW
ORANGE
G
-
Fan
W1
–
Stage 1 Heat
Y1
-
Stage 1 Comp
R - 24VAC Return
C
-
24VAC Common
Thermostat Connector
W2
-
Stage 2 Heat (Std)
O- Changeover (HP)
RH
G FAN
W1 H1
Y1 C1
W2/O
H2/CO
HVAC
SYSTEM
J5
TR40 Control Unit
RC
+V G T+ R-
H1
FAN
C1
C2
H2/CO
Position 1: Standard or Heat Pump HVAC system type. Set to correct type.
Standard Gas/Electric = OFF
Heat Pump Systems = ON
Position 2: Standard Fan or Fan with Heat. (Leave Off for Heat Pump systems)
For Gas heat set to OFF
For Electric heat set to ON. (for any system that requires a fan call with heat)
Position 3: Changeover with Heat or Cool. For Heat Pump HVAC systems only
Set to correct mode for Changeover Valve (Reversing Valve).
Changeover in Cool mode = OFF
Changeover in Heat mode = ON
Position 4: Reserved
+V = Optional 12VDC power input
G = Gnd
T+ = Transmit for RS232, B+ for RS485
R- = Receive for RS232, A- for RS485
To Com Port
or Network
RS232 or RS485
HCFRX
REV G
JP2
RC=RH
NOTE: Jumper JP2 is factory installed for normal HVAC
systems with a common heating and cooling transformer.
Cut jumper JP2 for separate transformer systems
with both RC and RH wires.
Y2 C2
Y2- Stage 2 Comp
Off
On
SW1