COMMISSIONING
CARE/CLEANING
8COMMISSIONING
8.1 General
To ensure proper commissioning it should be carried out by an
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
pump controller.
CAUTION! 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:
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
Heat source temperature | max. difference between heating | |||
from | to | supply and return temperature | ||
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 |
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.
9CARE/CLEANING9.1 Care
The heat pump is designed for
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
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.
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