Staging Logic; Staging Timers; Staging Temp; Wshp Fault Codes - Bosch BCC100 Settings Manual

3 Staging Logic

Staging response determines how the thermostat stages heating or cooling calls
based on the diff erence between space temperature and the set point (1.0°F or
1.5°F).

3.1 Staging Timers

There are 4 timers defi ned in the stage algorithm, MRT (Minimum Run Timer), ASC
(Anti-Short Cycle Timer), Stage Delay and a fi xed 3 minutes timer for quick staging
down.
 When any stage is on, it has to run for the MRT, except in the scenario of
quick staging down where the heating/cooling is turned off.
 When any stage is up or down, it has to wait for Stage Delay to expire.
 When all stages are turned off, the system has to wait for ASC to expire
before it can be turned on again. Please note, the ASC timers run
concurrently with Fan off Delay timer defined elsewhere.
Interval Minimum
Stage Delay 3 Minutes
MRT(Minimum Run Time) 3 Minutes
ASC (Anti-Short Cycle) 0 Minutes
Quick Stage Down 3 Minutes
Table 1 Stage Timers

3.2 Staging Temp

Stage temperature is use to determine whether there is a need for quick staging up
or staging down based on a temperature setpoint diff erential.
Interval Minimum
Stage Temp 0°F
Table 2 Stage Temp
Bosch Connected Control BCC100 Thermostat (01.2022)
Maximum Default Resolution
90 Minutes 10 Minutes 1 Minute
Stage Delay 5 Minutes 1 Minute
5 Minutes 5 Minutes 1 Minute
3 Minutes 3 Minutes Fixed
Maximum Default Resolution
15°F 5°F 1°F

4 WSHP Fault Codes

If your Bosch Connected Control (BCC) thermostat is connected to one of Bosch's
Water Source Heat Pump (WSHP) products, the following WSHP fault codes can
be displayed on the BCC. Please refer to the WSHP product's installation and
operation manual for more details on troubleshooting.

4.1 High Pressure Alarm

The equipment has detected a high head pressure condition and prohibited heating
and cooling calls. Contact your local contractor for service. Press the enter key to
return to normal thermostat display.

4.2 Low Pressure Alarm

The equipment has detected a low head pressure condition and prohibited heating
and cooling calls. Contact your local contractor for service. Press the enter key to
return to normal thermostat display.

4.3 Condenser Coil Freeze Alarm

The equipment has detected a freeze condition and prohibited heating and
cooling calls. The sensor that has triggered this fault is monitoring the refrigerant
temperature between the TXV and the air coil. The UPM board is aware of the mode
of operation, and this sensor will be monitored in the cooling mode. Contact your
local contractor for service. Press enter key to return to normal thermostat display.

4.4 Condensate Alarm

The equipment has detected a condensate line blockage condition and prohibited
cooling calls. Contact your local contractor for service. Press the enter key to
return to normal thermostat display.

4.5 Brown Out Alarm

The equipment has detected a power brownout condition and prohibited heating
and cooling calls. Contact your local contractor for service. Press the enter key to
return to normal thermostat display.

4.6 Evaporator Coil Freeze Alarm

The equipment has detected a freeze condition and prohibited heating and
cooling calls. The sensor that has triggered this fault is monitoring the refrigerant
temperature between the TXV and the water coil. The UPM board is aware of the
mode of operation, and this sensor will be monitored in the heating mode. Contact
your local contractor for service. Press enter key to return to normal thermostat
display.
Advanced Settings Guide
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