182
Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Installation
6
6.8.2.2 Connecting accessories to the mono-bloc unit
The following method is correspondingly applicable for all mono-bloc units, but will be explained
here on the basis of the example of a 9 kW single-phase model (J Generation) (→
example for accessories (Mono-bloc units), p. 182
Carry out the following steps to connect accessory cables to the external interfaces of the mono-
block unit:
1.
2. If there is a cover on the cable gland on the rear side of the cabinet (depends on model),
remove the cover before connecting the cable and re-assemble it afterwards.
If there is a cable sleeve (depends on model), cut the cable sleeve crosswise using a knife.
3. Guide the accessory cables through the cable glands according to the illustration below (
2
,
3
,
4
,
5
,
6
,
16
) into the device.
4. Fix the accessory cables using cable binders (
10
,
18
) and cable clamps/strain reliefs (
9
,
19
).
5. Connect the accessory cable according to the installation example below and the
subsequent brief overview of the external interfaces (→
6.8.2.3 Brief Overview of external
and take care to leave the earth conductor (if present) longer than the
other cables (
a
). Also see that the cables do not come in contact with the pump or other hot
objects such as the water pipes at any point, so that the insulation is not damaged.
Installation example for accessories: Mono-bloc unit
A
2
1
3
4
5
6
B
8
9
8
7
11
8
9
10
9
10
a
9
13
12
B WH-MDC09J3E5: Detailed view of the
Front Side
7 Optional additional PCB CZ-NS4P
8 Cable glands for accessories cable
9 Cable holder / cable reliefs
10 Cable binder
11 Main PCB
12 FI switch for mains connection 2
13 FI switch for mains connection 1
a Ground connector for safety reasons to
be left longer than the other cables
A WH-MDC09J3E5: Detailed view of the Rear Side
1 Rear side of the Cabinet
2 Cable gland for room thermostat heating zone 1,
room thermostat heating zone 2, mixing valve heating
zone 1, mixing valve heating zone 2
3 Cable gland for pump heating zone 1, pump heating
zone 2, solar system, swimming pool pump, alarm
signal
4 Cable gland for room temperature sensor heating
zone 1, room temperature sensor heating zone 2,
buffer tank temperature sensor, swimming pool
temperature sensor, water temperature sensor
heating zone 1, water temperature sensor heating
zone 2, demand control signal, solar temperature
sensor, Smart Grid signal, heating/cooling switchover,
external outdoor unit switch
5 Cable gland for external control signal, tank tempera-
ture sensor, room temperature sensor heating zone 1,
outdoor temperature sensor, overload protection hot
water tank
6 Cable gland for 3 way-valve, 2-way valve, room
thermostat heating zone 1, electric backup heater for
heat pump, additional pump, connection of bivalent
heat source, remote controller
