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8
8
Start-up
8.1 General Information
To ensure that start-up is performed correctly, it should only be
carried out by an after-sales service technician authorized by the
manufacturer. This will lead, under certain circumstances, to an
extension of the warranty period (cf. Warranty). Start-up should
be carried out in heating operation.
8.2 Preparation
The following items need to be checked prior to start-up:
All of the heat pump connections must be established as de-
scribed in Chapter 7.
The heat source system and the heating circuit must have
been filled and checked.
The dirt trap must have been inserted in the brine inlet of the
heat pump.
All valves that could impair proper flow in the brine and heat-
ing circuits must be open.
8.3 Start-Up Procedure
The heat pump is started up using the switch (1).
If an overflow valve is fitted to maintain the minimum heating
water flow rate, the valve must be adapted to the requirements of
the heating system. Incorrect adjustment can lead to faulty oper-
ation and increased energy consumption. We recommend carry-
ing out the following procedure to correctly adjust the overflow
valve:
Close all of the heating circuits that may also be closed during
operation (depending on the type of heat pump usage) so that
the most unfavourable operating state - with respect to the water
flow rate - is achieved. This normally means the heating circuits
of the rooms on the south and west sides of the building. At least
one heating circuit must remain open (e.g. bathroom).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heating flow and re-
turn flow listed in the table below for the current heat source tem-
perature. The temperature spread should be measured as close
as possible to the heat pump. The heating element of mono en-
ergy systems should be disconnected.
Heat source
temperature
From
To
-5 °C
0 °C
1° C
5° C
6° C
9° C
10° C
14° C
15° C
20° C
21° C
25° C
E-6
Max. temperature spread
between heating flow and
return flow
10 K
11 K
12 K
13 K
14 K
15 K
9
Description of the
Control System
Functions
9.1 Operator Controls
1)
Switch on/standby
2)
Switch heating/cooling
3)
Indicator (illuminates if HP voltage is on)
4)
Setpoint potentiometer (return flow)
5)
Pressure indicator for brine circuit
6)
Pressure indicator for heating circuit
7)
Temperature indicator for heating circuit
Switch (1) switches the heat pump to ready (I) or to standby
mode ( ).
The heat circulating pump operates continuously in the switch
position (l). There is a 10-minute delay when switching from heat-
ing to cooling operation and vice versa.
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