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8
9
COMMISSIONING
CARE/CLEANING
COMMISSIONING
8.1 General
To ensure proper commissioning it should be
carried out by an after-sales service authorised by
the manufacturer. Only then can an extended
warranty period of 3 years in total be granted (cf.
Warranty service).
8.2 Preparatory Steps
Prior to commissioning, the following items need to
be checked:
- All connections of the heat pump must have been
made as described in Chapter 7.
- The heat source system and the heating circuit
must be filled and tested.
- Strainer and vent must be fitted in the brine inlet
of the heat pump.
- All valves that could impair the proper water flow
must be open in the brine and heating circuits.
- The heat pump controller must be adapted to the
heating installation in accordance with the
instructions contained in its operating manual.
- Proper condensate drainage must be ensured.
- Drainage of the liquid emerging from the brine
and heating water overflow valves must be
ensured.
8.3 Commissioning Procedure
The start-up of the heat pump is effected via the heat
pump controller.
Commissioning of the heat pump
must be carried out in accordance with the
installation and operating manual of the heat
pump controller.
The delivery rate of the circulating pump must be
adapted to the heating system.
The setting of the overflow valve must be adapted to
the requirements of the heating system. An incorrect
setting may result in various error symptoms and an
increased electric power consumption. To correctly
set the overflow valve, the following procedure is
recommended:
8
Close all of the heating circuits that may also be
closed during operation (depending on the type
of heat pump usage) so that the least favourable
operating state - with respect to the water flow
rate - is achieved. Normally, these are the heating
circuits of the rooms located on the south and
west sides of buildings. At least one heating circuit
must remain open (e.g. bathroom).
The overflow valve is to be opened to such an
extent that based on the current heat source tem-
perature the maximum temperature difference
between heating supply and return flow tem-
perature is obtained, as indicated in the table
below. The temperature difference should be
measured as closely to the heat pump as
possible. In mono-energetic systems, the electric
heating element is to be deactivated.
Any malfunctions occurring during operation are
indicated on the display of the heat pump controller
and can be corrected as described in the operating
manual of the heat pump controller.
CARE/CLEANING
9.1 Care
The heat pump is designed for maintenance-free
operation. To prevent operating malfunctions caused
by dirt deposits in the heat exchangers, care must be
taken that no contamination whatsoever can enter the
heat source and heating systems. In the event that
operating malfunctions due to contamination occur
nevertheless, the system should be cleaned as
described below.
9.2 Cleaning of Heating Side
The ingress of oxygen into the heating water circuit
may result in the formation of oxidation products (rust).
It is therefore important - in particular with respect to
the piping of the underfloor heating systems - that
the installation is executed in a diffusion-proof manner.
Also residues of lubricating and sealing agents may
contaminate the heating water.
In the case of severe contamination leading to a
reduction in the performance of the condenser in the
heat pump, the system must be cleaned by a heating
technician.
CAUTION!
Heat source temperature
from to
max. difference between heating
supply and return temperature
-5 °C 0 °C 10 K
1 °C 5 °C 11 K
6 °C 9 °C 12 K
10 °C 14 °C 13 K
15 °C 20 °C 14 K
21 °C 25 °C 15 K