Dimplex LA 35TBS Montage- Und Gebrauchsanweisungen Seite 27

LA 35TBS
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!
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< -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 - -
452166.66.11e · FD 0503
Note:
The hot water connections must be established according to
the dimensional drawing (see cap. 1 on page II) in the counter-
current 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 "Start-up". When the minimum heating water flow rate
is undershot, the plate heat exchanger in the refrigeration cir-
cuit 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. With design temperatures below
30 °C in the flow, the design must be based on the max. volume
flow with 5 K spread for A7/W35.
The specified nominal flow rate (See "Device information" on
page 13.) must be assured in all operating states. 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.
Frost protection
Heat pump systems, which cannot be guaranteed to be frost-
free, should be equipped with a drainage option (see Fig.). The
frost protection function of the heat pump manager is active
whenever the heat pump manager and the heat circulating
pump 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, and if required, blown out, at three locations (see illus-
tration). 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).
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English
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EN-9