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Bosch TSTBM3H2CPH6W-A Installation Manual Page 12

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Subject to change without prior notice Revised 02-13
12 TSTBM3H2CPH6W-A Terminal Designations
TERMINAL DESIGNATIONS ON BASE MODULE
Terminal 2 Heat 2 Cool
Conventional System
2 Heat 2 Cool
Heat Pump System
3 Heat 2 Cool
Heat Pump System
RC Transformer power (cooling) Transformer power (cooling) Transformer power (cooling)
RH Transformer power (heating) Transformer power (heating) Transformer power (heating)
C Transformer common Transformer common Transformer common
B Energized in heating
(not used)
Heat pump changeover valve
energized in heating
Heat pump changeover valve
energized in heating
O Energized in cooling
(not used)
Heat pump changeover valve
energized in cooling
Heat pump changeover valve
energized in cooling
G Fan relay Fan relay Fan relay
W/E First stage of heat Emergency heat relay Emergency heat relay
Y First stage of cool First stage of heat & cool First stage of heat & cool
Y2 Second stage of cool Second stage of cool Second stage of cool and second
stage of heat
W2 Second stage of heat Auxiliary heat relay,
second stage of heat
Auxiliary heat relay,
third stage of heat
H Humidify Humidify Humidify
D Dehumidify Dehumidify Dehumidify
Caution
If separate transformers for heating and cooling
are not present, jump RC and RH terminals at
the thermostat and connect the HOT lead from
the transformer to RC
Caution
TSTBM3H2CPH6W-A Wiring Notes:
- In systems with no emergency heat relay, a
jumper can be installed between E and W2
- Due to the internal circuitry, a voltage
potential will exist across any terminal and
common if that terminal is not connected to a
resistive load.
- Bosch Water Source Heat Pumps utilize “O”
type reversing valve operation. If your heat
pump utilizes “B” type reversing valve
operation, substitute the wiring for the “O”
terminals for “B”.
TERMINAL DESIGNATIONS ON TSTBM3H2CPH6W-A MASTER THERMOSTAT
Terminal 2 Heat 2 Cool
Conventional System
2 Heat 2 Cool
Heat Pump System
3 Heat 2 Cool
Heat Pump System
R 24 VAC Transformer power 24 VAC Transformer power 24 VAC Transformer power
C Transformer common Transformer common Transformer common
POWERING THE TSTBM3H2CPH6W-A
MASTER THERMOSTAT
If remote sensors (TSTBM-OTS--TW-A or
TSTBM-RRS--TW-A) are to be used with the wireless
system you must hardwire the TSTBM3H2CPH6W-A
master thermostat.
Once the base module and the thermostat have been
securely mounted and both have been completely
wired for the applicable system, communication can
be established between the two.
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