Commissioning; General Information; Preparatory Steps; Procedure - Buderus WPL 80AMR Montage- Und Gebrauchsanweisung

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Commissioning

7.1 General Information

To ensure proper commissioning it should be carried out by an
after-sales service authorized by the manufacturer. This will lead,
under certain circumstances, to an extension of the warranty pe-
riod (cf. Warranty).

7.2 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 6.
In the heating circuit all valves that could impair the proper
heating water flow must be open.
The air intake/discharge path must be unobstructed.
The sense of rotation of the fan must correspond to the di-
rection of the arrow.
The settings of the heat pump controller must be adapted to
the heating installation in accordance with the instructions
contained in its instruction manual.
Proper condensate drainage must be ensured.

7.3 Procedure

The start-up of the heat pump is effected via the heat pump con-
troller. The settings must be made in accordance with its instruc-
tion manual.
Where the minimum heating water flow rate is assured by means
of an overflow valve, the valve must be set to meet the require-
ments of the heating installation. An incorrect setting may result
in various error symptoms and an increased electrical 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 temperature the maximum tempera-
ture difference between heating supply and return flow tempera-
ture 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 ele-
ment is to be deactivated.
E-6
Heat source
temperature
between heating supply and
from to
-20 °C -15 °C
-14 °C -10 °C
-9 °C -5 °C
-4 °C 0 °C
1 °C 5 °C
6 °C 10 °C
11 °C 15 °C
16 °C 20 °C
21 °C 25 °C
26 °C 30 °C
31 °C 35 °C
Any malfunctions occurring during operation are displayed on the
heat pump controller and can be corrected as described in the
operating manual of the heat pump controller.
In the case of outdoor temperatures below 10 °C and heating
water temperatures below 16 °C, the buffer tank has to be hea-
ted to at least 25 °C using the backup heating system.
The following procedure has to be observed so that the commis-
sioning activities can be carried out without any problems:
1) Close all heating circuits
2) Open the overflow valve all the way.
3) Select the automatic mode on the controller.
4) Wait until the buffer tank has reached a temperature of at
least 25 °C.
5) Subsequently, slowly reopen the valves of the heating cir-
cuits, one after the other, in such a way that the heating
water flow rate is continually increased by slightly opening
the related heating circuit valve. When so doing, the heating
water temperature in the buffer tank must not fall below
20 °C so that the heat pump can be defrosted at any time.
6) Once all heating circuit are fully open and a heating water
temperature of approx. 20 °C is maintained in the buffer
tank, the minimum flow rate must be set on the overflow
valve and the heating circulating pump.
7) New buildings have an increased heat demand due to the
energy required for structural drying. This increased heat
demand may result in insufficiently dimensioned heating in-
stallations not attaining the desired room temperature at all
times. In this case it is therefore recommended that the sup-
plemental heating system be kept at standby in the first
heating season. The limit temperature on the heat pump
controller should therefore be raised to 15 °C.
max. difference
return temperature
4 K
5 K
6 K
7 K
8 K
9 K
10 K
11 K
12 K
13 K
14 K