auer HRC70 17 - HEAT PUMP POWER SUPPLY WIRING; HRC70 Heat Pump: 230 V Single Phase Connection; HRC70 Heat Pump: 400 V Three Phase Connection

- INSTALLER HIGHTEMPERATURE ENERGY EFFICIENT HEAT PUMP MANUAL-
23
3.5.4 - Electrical protection for the
compressors
3.5.3.2 -HRC
70
Heat Pump: 400V three-phase
connection
L1,L2,L3 = phase
N = neutre
PE = terre
• Three-phase monitor relay for the HRC
70
Heat Pump
(17kW, 20kW and 25kW)
A phase monitor relay is installed to prevent a phase failure,
which could damage the compressors. If the phases are
reversed, it will stop the power supply to the Heat Pump.
The HRC
70
Heat Pump is equipped with a soft start-up device to
limit the intensity of the current when the motor starts up, in
compliance with the limits set by the NF C 15 100 standard (45A
per phase for single phase and 60A per phase for three-phase).
If the phase order is reversed or there is a phase missing, the relay
cuts the power supply to the circuit board. A «BUS ERR» error
message will appear. This is indicated on the phase monitor relay
by the orange light at the top being o and the green light at the
bottom being on. To correct the error, reverse the two phases on
the mains power terminal.
When the Pilot is switched on, a ‘‘BUS ERR’’ error message will
be displayed. Reverse the two phases on the three-phase power
cable of the Heat Pump. Switch the power back on and check the
voltage on each phase.
In case of INCORRECT WIRING:
Warning: never work with live voltage!
The electrical protection devices for the
compressors constantly monitor the
current and voltage. In case of over voltage,
under voltage or an abnormally high current,
the compressor will be stopped.
• Soft start-up device for the HRC7
0
Heat Pump when
using a single phase system
The soft start-up device constantly monitors the compressor
by measuring the current and voltage. In case of over voltage,
under voltage or an abnormally high current, the compressor
will be stopped.
How it works:
• The soft start-up device controls
the start-up phase until the motor
reaches its stable operating speed.
• If the motor cannot start, it is
because the power supply has been
cut o by the soft start-up device.
In order to protect the compressor, the motor will not be able
to start up again until 5 minutes after it has been stopped.
Start-up errors:
• If the compressor fails to start up, two lights (green and red)
will  ash to indicate that there is an error (see § "Compressor
start-up errors".
• Soft start-up for the HRC
70
Heat Pump when using a
three-phase system (25kW)
The soft start-up device also serves to control the phases (phase
order or missing phase, which could damage the compressor).
If the phase order is reversed or a phase is missing the relay cuts
o the power supply to the compressor. This error is indicated
by the light  ashing once per second.
The soft start-up device controls the power supply
voltage. If it is less than195V, the compressor
will either fail to start or switch o . The error is
indicated by a fast- ashing light (10  ashes per
second).
In case of a compressor error, (overcurrent, short
circuit or an error on the start-up device itself)the
error is indicated by the light  ashing on for  ve
seconds and then o for  ve seconds.
CABLAGE CORRECT CABLAGE INCORRECT
3.5.3.1 -HRC
70
Heat Pump:230V single phase
connection
L = phase
N = neutral
PE = ground
Thermal magnetic fuse
or circuit-breaker
see §
"Recommendations
for connecting to
power supply"
Thermal magnetic fuse
or circuit-breaker
see § "Recommendations
for connecting to power
supply"
L1,L2,L3 =
ph
as
e
N
= n
eu
tr
e
PE = t
e
rr
e
L = phase
N = neutral
PE = ground
CORRECT WIRING INCORRECT WIRING
orange and
green lights on
green light
only on