Data Sheet for Product

16
Siemens Industry, Inc.
A6V10807603_enUS_b
Smart Infrastructure
11/23/2021
Terminal
Use
RH
AC 24 V, heating system
RC
AC 24 V, cooling system
C
AC 24 V, common
W1/O/B
Stage 1 heating (W1) in conventional system or reversing valve O/B in heat
pump system
W2/AUX
Stage 2 heating in conventional system, Stage 1 Aux Heat in heat pump
system
W3/UNIV
Stage 3 heating or universal output in conventional system, or Stage 2
auxiliary heat or universal output in heat pump system
Y1, Y2
Stages 1 and 2 cooling in conventional system or Stages 1 and 2
compressor in heat pump system
G
Fan
X1, X2
Configurable input
M
Common for X1/X2 inputs
Wiring Diagrams
Jumper in Place
Jumper Removed
Note:
● For US installations use Class 2 rated power source. For other installations, use current
protection with current rated at max. 4 A.
● If a single transformer is used, keep jumper RH-RC in place. Connect AC 24 V to the
RC terminal, and neutral to terminal C. If separate transformers are used for heating
and cooling systems, remove jumper RH-RC. Connect cooling AC 24 V to terminal RC,
neutral to terminal C and heating AC 24 V to terminal RH.