Connection On Heating And Hot Water Side; Connection On Heat Source Side - Dimplex WI 140TUR+ Installation And Operating Instruction

WI 140TUR+
7.2 Connection on heating and hot
water side
ATTENTION!
The heating system must be flushed prior to connecting the
heat pump.
Before completing the heat pump connections on the heating
water side, the heating installation must be flushed in order to
remove any impurities that may be present, as well as residues
of sealing material, and the like. Any accumulation of deposits
in the condenser may result in a total failure of the heat pump.
ATTENTION!
It is recommended that the secondary side be equipped with
the flow rate switch (available as an option).
ATTENTION!
It is recommended that the primary side be equipped with the
flow rate switch (available as an option).
Once the installation on the heating side has been completed,
the heating system must be filled, de-aerated and pressure-
tested.
Consideration must be given to the following when filling the
system:
 Untreated filling water and make-up water must be of
drinking water quality
(colourless, clear, free from sediments)
Filling water and make-up water must be pre-filtered (pore

size max. 5 µm).
Scale formation in domestic hot water heating systems cannot
be avoided, but in systems with flow temperatures below 60 °C,
the problem can be disregarded. With high-temperature heat
pumps and in particular with bivalent systems in the higher per-
formance range (heat pump + boiler combination), flow tem-
peratures of 60 °C and more can be achieved. The following
standard values should therefore be adhered to with regard to
the filling and make-up water according to VDI 2035, sheet 1:
The total hardness values can be found in the table.
Total alkaline earths
Total heat
in mol/m³ and/or
output in kW
mmol/l
< 50 2.0
2.0
50 - 200
1.5
200 - 600
> 600 < 0.02
1. This value lies outside the permissible value for heat exchangers in heat
pumps.
Fig. 7.1:Guideline values for filling and make-up water in accordance with
VDI 2035
For systems with an above-average specific system volume of
50 l/kW, VDI 2035 recommends using fully demineralized
water and a pH stabiliser to minimize the risk of corrosion in the
heat pump and the heating system.
ATTENTION!
With fully demineralized water, it is important to ensure that
the minimum permissible pH value of 7.5 (minimum
permissible value for copper) is complied with. Failure to
comply with this value can result in the heat pump being
destroyed.
www.gdts.one
Specific system volume
(VDI 2035) in l/kW
20 < 50 50
< 20
Total hardness in °dH
16.8 11.2
 11.2 8.4
< 0.11
8.4
1
< 0.11
1
< 0.11
452234.66.76 · FD 9912
Use of the optionally available four-way reversing valve is rec-
ommended. A detailed installation description can be found in
the instructions included with the valve.
Note:
For operation of the heat pump with the four-way reversing
valve, it is essential to set up the hydraulic connections accord-
ing to the instructions included in the scope of supply of the
valve. The instructions give a description of the precise proce-
dure for the correct assembly of hydraulics. Non-observance of
this will lead to restrictions in the operation of the heat pump.
Important:
The notes/settings in the instructions of the heat pump man-
ager must always be observed and carried out accordingly; not
doing so will lead to malfunctions.
Heating water minimum flow rate
The minimum heating water flow through the heat pump must
be assured in all operating states of the heating system. This
can be accomplished, for example, by installing either a dual
differential pressureless manifold.
Provided the heat pump manager and heating circulating
pumps are ready for operation, the frost protection feature of
the heat pump manager is active. If the heat pump is taken out
of service or in the event of a power failure, the system has to be
drained. In heat pump installations where a power failure can-
not be readily detected (holiday house), the heating circuit must
contain a suitable antifreeze product.

7.3 Connection on heat source side

The following procedure must be observed when making the
connection:
Connect the well pipes to the heat pump's flow and return heat
source.
ATTENTION!
It is essential that the dirt trap included in the accessories
pack is installed in the return (inlet).
ATTENTION!
The well water must comply with the required water quality
standards.
The hydraulic integration diagram must be adhered to.
1
English
EN-7