2.8.11 Wiring single-stage heat pump
with a tankless water heater as a
backup
Required: The pump initiates a call from the tankless water heater heat source as a
backup.
Optional: 'G' for fan-only operation and 'C' for t-stat common.
The reversing valve operation is selectable with the AHU app: the default setting
energizes O/B terminal during cooling.
Required: The outdoor sensor for balance point control of backup heat source is available
separately as IBC outdoor sensor P-9067.
Required: Sensors for cooling applications are available separately as IBC A/C sensor kit
P-1015.
Figure 46 Single-stage heat pump with a tankless water heater as a backup wiring
Settings in the IBCconnect app
1.
Tap (menu icon), and select Basic Settings.
2. Set Heat Mode to Stg 1 HP, Stg 2 Aux.
3. Set Cool Mode to 1 Stage HP.
4. Set Boiler Heating to Boiler Backup.
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