Dimplex LA 60S-TU Montage- Und Gebrauchsanweisungen Seite 38

English
Saturation Index
Filterable materials
Total hardness
Oxygen (O )
2
-
Nitrite (NO )
2
2-
Sulphide (S )
1. If the limit values in the VDI 2035 are more restrictive, these apply accord-
ingly.
2. When using demineralised water, ensure that the minimum permissible pH
value of 8.2 is not undershot. Failure to comply with this value can result in
the heat pump being destroyed.
Fig. 6.2:Limit values for the quality of heating water
Resistance of copper-soldered or welded stainless-steel plate
heat exchangers to the substances present in water:
Notes
"+" = Normally good resistance

 "o" = Corrosion problems may arise,particularly if several
factors receive an evaluation of "o"
"-" = Should not be used

NOTE
The water quality should be checked again after 4 to 6 weeks,
as the quality could change during the first few weeks of
operation due to chemical reactions.
NOTE
It is mandatory to use hydraulically closed systems. It is not
permissible to use any open hydraulic systems!
EN-8
< -0.2 o o
-0.2 - 0.1 + +
0.1 - 0.2 + o
> 0.2 o o
< 30 + +
> 30 - -
< 6 °dGH o/+ o/+
6 - 11 °dGH + +
> 11 °dGH - -
< 0.02 + +
< 0.1 +/o +/o
> 0.1 - -
< 0.1 + +
> 0.1 - -
< 1.0 + +
> 1.0 - -
452163.66.89-EN · FD 0503
Note:
The hot water connections must be established according to
the dimensional drawing (see Cap. 13.1 on page 16) in the
countercurrent principle.
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.
Minimum heating water 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 either a
dual differential pressureless manifold or an overflow valve. The
procedure for setting an overflow valve is described in the
chapter "Commissioning". When the minimum heating water
flow rate is undershot, the plate heat exchanger in the refriger-
ation circuit can freeze, which can lead to total loss of the heat
pump.
The nominal flow rate is specified depending on the max. flow
temperature in the device information and must be taken into
account during planning.
The specified "Minimum heating water flow rate for pump siz-
ing" (See "Device information" on page 13.) must be ensured
during defrosting and cooling operation. An installed flow rate
switch is used only for switching off the heat pump in the event
of an unusual and abrupt drop in the heating water flow rate
and not to monitor and safeguard the nominal flow rate.
Antifreeze
Heat pump systems, which cannot be guaranteed to be frost-
free, should be equipped with a drainage option (see Fig.). The
antifreeze function of the heat pump manager is active when-
ever the heat pump manager and the heat circulating pump are
ready for operation. When decommissioning the heat pump, or
in the event of a power failure, the system must be drained
through the indicated points (see illustration); it may be neces-
sary to purge the system with compressed air. The heating cir-
cuit should be operated with a suitable antifreeze if heat pump
systems are implemented in buildings where a power failure
cannot be detected (holiday home).
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LA 60S-TU
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