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10.7 power supply
Notify your local power supply utility of the electrical connection.
Only qualified electricians must carry out the installation in
accordance with these instructions.
Danger to life through electrocution!
Before any work. isolate the equipment from the power
supply at the control panel.
Observe VDE 0100 [or local regulations] and the regulations of your
local power supply utility.
The heat pump must be able to be separated from the mains power
supply by an additional isolator. that disconnects all poles with at
least 3 mm contact separation. For this purpose. use contactors.
main isolators. fuses. etc. on site.
The terminals are located above the control panel. Remove the lid
to enable the equipment to be connected.
The following are connected at the terminals:
- the power supply of the IWS heat pump control unit
- the compressor power supply
- the brine pump power supply
- the BUS cable (J-Y (St) 2x2x0.8)
Ensure that High. Low and Ground are correctly connected.
- the enable signal for the stand-alone operation at terminal
X4/2. For this. remove the jumper between X4/L and X4/2.
The IWS (integral heat pump controller) is a PCB that is fitted as
standard into the heat pump control panel. The IWS controls the
contactors of the compressors and the starting current limiter.
receives the signal inputs for high pressure. low pressure and
central faults and contains the BUS interface to the WPM II.
Use appropriate cables in accordance with local regulations
for all connections. For this. observe the
electrical details
in
"Specification" and the
electrical connection diagram
.
Check the strain relief function.
Observe the operating instructions for the WPM II heat pump
manager.
Connect the circulation pump for the heat consumers in accordance
with the electrical connection diagram or the engineering
documentation.
in case of external installation.
use only weather-proof
connecting cables to VDE 0100 [or local regulations]. As a
minimum requirement. use cables with rubber sheathing with
the identification 60245 IEC 57. Route all lines inside a conduit
(protective pipe).
To prevent the heat pump from being damaged by frost in case of
external installation or when installing it in a room that is not free
from the risk of frost. fit and electrically connect the contact sensor
avf 6
at the heating-return. The contact sensor is electrically
connected at terminals X2/4 and X2/5.
The heating circuit pumps are started when the heating-return
temperature falls to +8 °C. The reverse switching hysteresis is 4 K.
Sensor installation:
f
Thoroughly clean the pipe.
f
Apply heat conducting paste
a
.
f
Secure the sensor with a tie.
StanD-alone operation
In emergencies. this heat pump can also operate without the heat
pump manager (see troubleshooting).
Route all connecting cables and sensor leads through the apertures
in the back panel.
10.8 modules
When using a modular approach. connect the individual heat
pumps via terminal BUS 1. 2. 3. Ensure that High. Low and Ground
are correctly connected at the WPM II as well as at the heat pump.
installation
installation