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Aquarea air / water heat pump – design handbook 07 / 2014
Project Design
Electrical connection
Power supply
With the monobloc system, the mains connection is provided directly on the
monobloc unit. With the bi-bloc system the mains connection is provided on
the hydromodule, whereby the power supply of the outdoor unit is provided
via an additional connection between the hydromodule and outdoor unit.
An overview of the above-mentioned differences is depicted in the following
table. The required cross-sections can be derived from the technical data.
Electrical connections for the monobloc systems
5 to 9 kW
(single phase)
POWER SUPPLY 2
N
L
POWER SUPPLY 1
N
L
Additional electric heater and
electric immersion heater
Compact system
L N
L N
Power supply 2
L
1
N
1
L
1
N
1
Power supply 1
Fault-current protective switch
Mains connections
12 to 16 kW
(single phase)
POWER SUPPLY 3
N
L
POWER SUPPLY 2
N
L
POWER SUPPLY 1
N
L
Electric
immersion heater
Additional
electric heater
Compact system
L
2
N
2
L
2
N
2
Power supply 3
L N
L N
Power supply 1
L
1
N
1
L
1
N
1
Power supply 2
Fault-current protective switch
Mains connections
9 kW
(three phase)
POWER SUPPLY 1
L
A1
L
A2
L
A3
N
POWER SUPPLY 2
N
L
L
A1
L
A2
L
A3
N
L
A1
L
A2
L
A3
N
Power supply 1
Compact system and
additional electric heater
Electric
immersion heater
L N
L N
Power supply 2
Fault-current protective switch
Mains connections
12 to 16 kW
(three phase)
POWER SUPPLY 1
L
A1
L
A2
L
A3
N
POWER SUPPLY 2
POWER SUPPLY 3
L
C1
L
C2
L
C3
N
N
L
L
A1
L
A2
L
A3
N
L
A1
L
A2
L
A3
N
Power supply 1
Compact system
Electric immersion heater
Additional electric heater
L N
L N
Power supply 2
L
C1
L
C2
L
C3
N
L
C1
L
C2
L
C3
N
Power supply 3
Fault-current protective switch
Mains connections
Differences of electrical connections for monobloc systems, different phases and nominal heating capacities.