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Multi-connection system
Note:
The following restrictions apply only if PAW-560MAH3M is used alone or in combination with other AHU Kits. For all other
AHU Kit combinations without PAW-560MAH3M no such restrictions apply.
1 All AHU heat exchangers belonging to the same refrigerant circuit have to be installed in the same chassis equipped with
one single fan motor.
2 One AHU Kit and correspondingly one magnetic relay is required for each heat exchanger. All AHU Kits have to be wired
to the fan motor.
3 All AHU Kits shall be connected and controlled by group control wiring of one remote controller.
4 In case of a multiple AHU Kit combination within one refrigerant system, those kits must share the same AHU hous-
ing including fan, and they have to be "group-wired" and operate as a single group. In this case you must disconnect
the CZ-RTC6BL controller and CZ-CAPBC2 boards (ACC-SP1A PCB) from all but one AHU kit. It is irrelevant which
one is retained, there is no preference. The external connections need to be done only on the unit with the connected
CZ-CAPBC2 board.
System example for ECOi multi-connection system (140 kW capacity)
16 HP
Gas tube
Liquid tube
AHU Kit – Installation Instructions – 07/2023
16 HP
18 HP
Gas temperature
Liquid temperature
PAW-280MAH3M
PAW-560MAH3M
Inlet temperature
Outlet temperature
PAW-560MAH3M
Outdoor unit / indoor unit communication
Product description
28 kW
H/E
Fan operation signal
56 kW
H/E
Fan motor
control PCB
56 kW
H/E
31
3
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