IBC AHU 800 User Manual

2.8.7 Wiring two-stage heat pump
with a boiler or combi boiler as
backup (2-stage thermostat)
Required if the boiler or the combi boiler does not have control of the pump
Optional: 'G' for fan-only operation and 'C' for t-stat common
Dry contact from the air handler to the boiler or combi boiler that enables a call for heat
The reversing valve operation is selectable with the AHU app: default setting energizes O/B
terminal during cooling
Required: 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 42 Two-stage heat pump with a boiler or combi boiler as backup (2-stage thermostat) wiring
Settings in the IBCconnect app
1.
Tap (menu icon), and select Basic Settings.
2. Set Heat Mode to Stg 2 HP.
3. Set Cool Mode to 2 Stage HP.
45
2.8.7 Wiring two-stage heat pump with a boiler or combi boiler as backup (2-stage thermostat)

IBC AHU 800 Specifications

General

Brand	IBC
Model	AHU 800
Category	Air Handlers
Language	English