Connection On Heating Side; Water Quality In Heating Systems; Connection On Heat Source Side - Dimplex Si 50Tur Montage- Und Gebrauchsanweisungen

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7.3 Connection on heating side

CAUTION!
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.
CAUTION!
The maximum test pressure in the heating circuit and the
brine circuit is 6.0 bar. This value must not be exceeded.
NOTE
Pump units with check valves maintain the specified flow
directions. If there is incorrect distribution or breaking off of
the volume flow, these units (and the check valves in
particular) must be checked! The use of check valves are
mandatory in the event of several heating circuits or parallel
connections for heat pumps in order to avoid incorrect
distribution.
7.4 Water quality in heating
systems
NOTE
Damage due to unsuitable filling and additional water
Unsuitable filling and additional water can lead to deposits
and corrosion. This can reduce the performance of the heat
pump or cause damage to the system.
NOTE
The system installer is responsible for the water quality.
Do not use antifreeze (e.g. water / glycol mixture) in the heating
water.
Flush the heating system before filling.
The filling water must meet drinking water standards and must
comply with VDI 2035. The following limit values must also be
observed:
Evaluation characteristic
Electrical conductivity (saline
operation)
Electrical conductivity (low-
salt operation)
pH value
Total hardness
-
Chloride ions (Cl )
Iron (Fe)
Hydrogen carbonate/sul-
- 2-
phate (HCO /SO )
3 4
Filterable materials
1. Values stipulated in VDI2035 are applicable
2. When using demineralised water, ensure that the pH value is above the min-
imum permissible value of 8.2. Failure to comply with this value can result in
the heat pump being destroyed.
3. Check operation after 12 weeks at the latest.
EN-8
Concentration range
μS/cm
1
100 - 500
μS/cm
1
< 100
1 2 3
8.2 - 9.5
°dH 3.5 - 8.4
mg/l or ppm
< 20
mg/l or ppm 1
< 0.2
> 1.0
mg/l < 30
452237.66.83 · FD 0509
Before filling the system, obtain information about the drinking
water quality from the local water supply company. In many re-
gions the local water supply company's website provide an in-
sight into water hardness, pH value and a range of other con-
stituent substances.
NOTE
Check the water quality 10 to 12 weeks after filling /
commissioning.
Document the filling water conditioning, water quality and any
actions taken in the system handbook.
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 system.
This can be accomplished, for example, by installing a dual dif-
ferential 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.

7.5 Connection on heat source side

The following procedure must be observed when making the
connection:
Connect the brine pipe to the heat source flow and return of the
heat pump.
The hydraulic integration diagram must be adhered to.
CAUTION!
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.
CAUTION!
It is recommended that the brine circuit side be equipped with
the flow rate switch available as an option.
The brine liquid must be produced prior to charging the system.
The brine concentration must be at least 25 %. Freeze protec-
tion down to approx. -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.
CAUTION!
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.
SI 50 TUR
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