7.4
7 Installation
7.1General Information
The following connections need to be established on the heat pump:
Flow and return flow of the brine system
Flow and return flow of the heating system
Power supply
7.2Heating System Connection
ATTENTION!
Flush the heating system prior to connecting the heat pump.
Before connecting the heating water system to the heat pump, the heating system must be flushed to remove any impurities, residue from sealants, etc. Any accumulation of deposits in the liquifier could cause the heat pump to completely break down.
Once the heating system has been installed, it must be filled, de- aerated and
The sensors which are delivered already connected and loosely placed in the switch box must be mounted and insulated accord- ing to the block diagram.
7.3Heat Source Connection
The following procedure must be observed when connecting the heat source:
Connect the brine pipe to the heat pump flow and return. The hy- draulic plumbing diagram must be adhered to.
ATTENTION!
The supplied dirt trap must be inserted in the heat source inlet of the heat pump to protect the evaporator against the ingress of impurities.
In addition, a micro bubble air separator must be installed in the heat source system.
The brine liquid must be produced prior to charging the system. The liquid must have an antifreeze concentration of at least 25 % to ensure frost protection down to
Only monoethylene glycol or propylene
The heat source system must be
ATTENTION!
The brine solution must contain at least a 25 % concentration of a monoethylene glycol or propylene
English
Minimum heating water flow rate
The minimum heating water flow rate through the heat pump must be assured in all operating states of the heating system. This can be accomplished, for example, by installing either a manifold without differential pressure or an overflow valve. The procedure for adjusting an overflow valve is described in the Chapter
Antifreeze protection for installation locations prone to frost
The antifreeze function of the heat pump controller is active whenever the controller and the heat circulating pumps are ready for operation. If the heat pump is taken out of service or in the event of a power failure, the system has to be drained. The heat- ing circuit should be operated with a suitable antifreeze if heat pump systems are implemented in buildings where a power fail- ure can not be detected (holiday home).
7.4Electrical Connection
The following electrical connections must be established on the heat pump:
Connection of the control line to the control panel of the heat pump via terminal X1: L/N/PE.
Connection of the mains cable to the control panel of the heat pump via terminal X6: L/N//PE.
Connection of the brine circulating pump (to be provided by the customer) to the control panel of the heat pump via ter- minal X1: PE and pump contactor K5: 2/4. As an option, the brine pump can also be directly connected (see terminal connection plan).
All electrical components required for the operation of the heat pump are located on the control panel.
For detailed instructions concerning the connection and function- ing of the heat pump controller (e.g. external wall sensor included in the scope of supply) refer to the operating manual supplied with the controller.
An disconnecting device with a contact gap of at least 3 mm (e.g. utility blocking contactor or power contactor) as well as a
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