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7.2
7.2 Heating System Connection
The heat pump is equipped with separate outputs for the heating
circuit and the hot water circuit.
If the heat pump is not intended to be used to heat up the hot wa-
ter, the hot water output must be permanently sealed.
An overflow valve is installed in the device for systems in which
the heating water flow can be shut off via the radiator or thermo-
stat valves. This ensures a minimum heating water flow rate
through the heat pump and helps to avoid faults.
Once the heating system has been installed, it must be filled, de-
aerated and pressure-tested.
Consideration must be given to the following when filling the sys-
tem:
Untreated filling water and make-up water must be of drink-
ing water quality
(colourless, clear, free from sediments)
Filling water and make-up water must be pre-filtered (pore
size max. 5µm).
Scale formation in hot water heating systems cannot be com-
pletely avoided, but in systems with flow temperatures below
60°C the problem can be disregarded.
With medium and high-temperature heat pumps, temperatures
above 60°C can be reached.
The following standard values should therefore be adhered to
concerning the filling water and make-up water (according to VDI
2035 Sheet 1):
Total alkaline earths
Total heat
in mol/m³ and/or
output in [kW]
mmol/l
up to 200
200 to 600
> 600
< 0.02
Minimum heating water flow
The minimum heating water flow through the heat pump must be
assured in all operating states of the heating system.
This can be achieved using a heating circuit which is continu-
ously open, e.g. in a reference room which is regulated using a
room temperature controller (available as a special accessory).
(See integration diagram in chapter 4.1, Appendix)
The use of an overflow valve (see integration diagram in chapter
4.2, Appendix) is only advisable with panel heating and a maxi-
mum heating water flow of 1.3 m³/h; the use of a manifold without
differential pressure is recommended in addition (see integration
diagram in chapter 4.3, Appendix).
NOTE
System faults may result if this is not observed.
Antifreeze protection for installation locations
prone to frost
The antifreeze function of the heat pump manager is active
whenever the heat pump manager and the heat circulating
pumps are ready for operation. If the heat pump is taken out of
service or in the event of a power failure, the system has to be
drained. The heating circuit should be operated with a suitable
antifreeze if heat pump systems are implemented in buildings
where a power failure can not be detected (holiday home).
The integrated expansion vessel has a volume of 24 litres. This
volume is suitable for buildings with a living space area to be
heated of maximum 200 m².
E-6
All manuals and user guides at all-guides.com
Total
hardness in °dH
2.0
11.2
1.5
8.4
< 0.11
The volume should be checked by the heating system techni-
cian. If necessary, an additional expansion vessel must be in-
stalled (according to DIN 4751, Part 1). The tables listed in the
manufacturers' catalogues simplify dimensioning the system on
the basis of the water content.
ATTENTION!
In the case of large-volume heating circuits, an additional expansion
vessel must be used to supplement the installed expansion vessel (24
litres, 1.0 bar admission pressure).
7.3 Heat Source Connection
The following procedure must be observed when connecting the
heat source:
Connect the brine pipe to the heat pump flow and return.
The hydraulic plumbing diagram must be adhered to.
The dirt trap included in the scope of supply must be inserted in
the brine inlet of the heat pump by the customer.
The brine liquid must be produced prior to charging the system.
The liquid must have an antifreeze concentration of at least 25 %
to ensure frost protection down to -14 °C.
Only monoethylene glycol or propylene glycol-based antifreeze
may be used.
The heat source system must be de-aerated and checked for
leaks.
ATTENTION!
The brine solution must contain at least a 25 % concentration of a
monoethylene glycol or propylene glycol-based antifreeze, which must
be mixed before filling.
ATTENTION!
A suitable de-aerator (micro bubble air separator) must be installed in the
heat source circuit by the customer.
7.4 Temperature sensor
The following temperature sensors are already installed or must
be installed additionally:
External temperature (R1)
Temperature 1st, 2nd and 3rd heating circuit
(R2, R5 and R13)
Flow temperature (R9)
Hot water temperature (R3)
Temperature of renewable heat accumulator (R13)
7.4.1 Sensor characteristic curves
Temperature in °C
-20
-15
Standard NTC-2 in k 14.6
11.4
NTC-10 in k
67.7
53.4
15
20
25
30
35
2.9
2.4
2.0
1.7
1.4
14.9
12.1
10.0
8.4
7.0
The temperature sensors to be connected to the heat pump ma-
nager must correspond to the sensor characteristic curve illustra-
ted in fig. 7.1 on page. 7. The only exception is the external tem-
perature sensor included in the scope of supply of the heat pump
(see fig. 7.2 on page. 7)
-10
-5
0
5
10
8.9
7.1
5.6
4.5
3.7
42.3
33.9
27.3
22.1
18.0
40
45
50
55
60
1.1
1.0
0.8
0.7
0.6
5.9
5.0
4.2
3.6
3.1
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