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LIK 12TU
7.5.3 Connecting an electronically
regulated circulating pump
Electronically regulated circulating pumps have high starting
currents, which may shorten the service life of the heat pump
manager. For this reason, a coupling relay is installed or must be
installed between the output of the heat pump manager and
the electronically regulated circulating pump. This is not neces-
sary if the permissible operating current of 2 A and a maximum
starting current of 12 A are not exceeded in the electronically
regulated circulating pump or if express approval has been is-
sued by the pump manufacturer.
CAUTION!
It is not permitted to connect more than one electronically
regulated circulating pump via a relay output.
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 authorised by
the manufacturer. These measures can also include an addi-
tional warranty under certain conditions (see Warranty).
8.2 Preparation
The following items need to be checked prior to start-up:
All of the heat pump connections must be established as
described in Chapter 6.
All valves that could impair the proper flow of the heating
water in the heating circuit must be open.
The air intake and air outlet paths must be clear.
The ventilator must turn in the direction indicated by the
arrow.
The heat pump manager must be adapted to the heating
system in accordance with the controller's operating in-
structions.
Ensure the condensate outflow functions.
The outflow from the heating water pressure relief valve
must also function correctly.
Purging the heating system:
It is important to ensure that all heating circuits are open
and that the heat pump manager is energised. The heat cir-
culating pumps must be set to the highest setting. The sys-
tem must be purged at the highest point and topped up
with water if necessary (comply with the static minimum
pressure).
www.glendimplex.de
8.3 Procedure
The heat pump is started up via the heat pump manager. Ad-
justments should be made in compliance with the instructions.
The overflow valve must be adjusted to the requirements of the
respective heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We rec-
ommend carrying out the following procedure to correctly ad-
just 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 unfavorable 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 build-
ing. At least one heating circuit must remain open (e.g. bath-
room).
The overflow valve should be opened far enough to produce
the maximum temperature spread between the heating flow
and return flow listed in the following table for the current heat
source temperature. The temperature spread should be meas-
ured as close as possible to the heat pump. The heating ele-
ment of mono energy systems should be disconnected during
start up.
Heat source
temperature
From
-20 °C
-14 °C
-9 °C
-4 °C
1 °C
6 °C
11 °C
16 °C
21 °C
26 °C
31 °C
At hot water temperatures under 7 °C, start-up is not possible.
The water in the buffer tank must be heated to a minimum of
18 °C with the second heat generator.
To ensure a problem-free start-up, the following procedure is to
be implemented:
1)
Close all consumer circuits.
2)
Ensure that the heat pump has the correct water flow.
3)
Use the manager to select the automatic operating mode.
4)
In the special functions menu, start the "Start-up" program.
5)
Wait until a return temperature of at least 25 °C has been
reached.
6)
Now slowly reopen the heating circuit valves in succession
so that the heating water flow is constantly raised by
slightly opening the respective heating circuit. The heating
water temperature in the buffer tank must not be allowed
to drop below 20 °C during this process. This ensures that
the heat pump can be defrosted at any time.
7)
When all heat circuits are fully open and a return tempera-
ture of at least 18 °C is maintained, the heat pump start-up
is complete.
CAUTION!
Operating the heat pump outside of the operating limits, in
particular in excessively low system temperatures, may cause
the heat pump to break down completely.
452160.66.75a · FD 0112
Max. temperature spread
between heating flow and return
flow
To
-15 °C
4 K
-10 °C
5 K
-5 °C
6 K
0 °C
7 K
5 °C
8 K
10 °C
9 K
15 °C
10 K
20 °C
11 K
25 °C
12 K
30 °C
13 K
35 °C
14 K
English
EN-11
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