IBC AHU 1600 - Worked Examples

2.7.3 Connecting line voltage
Line voltage consists of a 120 VAC / 15 amp supply, external Pump – maximum 4 Amps 120 Volts,
thermostat connections – Standard THThermostat (communications thermostat protocol), external
pump control, boiler connection for a call for heat, and connection to an AC or HP appliance (air
handling appliance side only).
2.8 Worked examples
This section includes thirteen worked examples to help you set up the air handler for various
applications. Note that to configure the air handler, you need to download the IBCconnect app (see
Operating the air handler using the IBCconnect app on page 61).
Note
If using an air conditioner or heat pump:consult the air conditioner or heat pump's wiring
instructions before connecting to the AHU. An air conditioner or heat pump producing its
own control voltage will require isolation relays.
If the air conditioner or heat pump's wiring diagram shows a thermostat connecting
directly to the air conditioner or heat pump's board (without an external transformer),
then isolation relays will be required. See on Figure 35 . If in doubt, power the air
conditioner or heat pump before connecting to it, and measure for voltage across control
contacts Yand C:a voltage greater than ~2 Volts ACor DCindicates that isolation relays
will be necessary.
35
2.7.3 Connecting line voltage