Mounting; General Information; Heating And Hot Water Connection; Heat Source Connection - Dimplex SI 75TER+ Instructions D'installation Et D'utilisation

SI 75TER+
7

Mounting

7.1 General Information

The following connections need to be established on the heat
pump:
 Flow and return of the brine (heat source system)
 supply/return flow of the heating system
 Temperature sensor
 Voltage supply
7.2 Heating and Hot Water
Connection
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 re-
move 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!
The supplied strainer must be fitted in the heating water inlet of the heat
pump in order to protect the condenser against the ingress of impurities.
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 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. 5 µm).
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 heating systems tempera-
tures 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
EN-6
Total
hardness in °dH

2.0 11.2

1.5 8.4
< 0.11
452234.66.22 · FD 9411
Heating water minimum flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating sys-
tem. This can be accomplished, for example, by installing 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 cannot be read-
ily detected (holiday house), the heating circuit must contain a
suitable antifreeze product.

7.3 Heat Source Connection

The following procedure must be observed when making the
connection:
Connect the brine line to the flow and return pipe heat source
ofthe heat pump.
The hydraulic integration diagram must be adhered to.
ATTENTION!
The supplied strainer must be fitted in the heat source inlet of the heat
pump in order to protect the evaporator against the ingress of impurities.
The brine liquid must be produced prior to charging the system.
The brine concentration must be at least 25 %. Freeze protection
down to -14 °C can thus be ensured.
Only antifreeze products on the basis of mono-ethylene glycol or
propylene glycol may be used.
The heat source system must be vented (de-aerated) and
checked for leaks.
ATTENTION!
The brine solution must contain at least 25 % of an antifreeze agent on a
mono-ethylene glycol or propylene glycol basis and must be mixed prior
to filling.
NOTE
A suitable de-aerator (micro bubble air separator) must be installed in the
heat source circuit by the customer.
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