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SIW 6TES - SIW 11TES
Minimum heating water flow
The minimum heating water flow through the heat pump must
be assured in all operating states of the heating system.
This can be achieved using a heating circuit which is continu-
ously open, e.g. in a reference room which is regulated using a
room temperature controller (available as a special accessory).
(see integration diagram Cap. 4.1 on pag. XIV)
NOTE
System faults may result if this is not observed.
The frost protection function of the heat pump manager is ac-
tive whenever the heat pump manager and the heat circulating
pumps are ready for operation. The system must be drained if
the heat pump is taken out of service or in the event of a power
failure. If heat pump systems are implemented in buildings
where a power failure cannot be detected (holiday homes etc.),
the heating circuit should be operated with suitable frost pro-
tection.
The domestic hot water volume should be checked by the heat-
ing system technician. An additional expansion vessel and a
safety valve must be installed by the customer (according to
DIN 4751, Part 1). The tables listed in the manufacturers' cata-
logues simplify dimensioning the system on the basis of the
water content.
7.3 Heat source connection
The following procedure must be observed when making the
connection:
Connect the brine pipe to the heat pump flow and return.
An additional expansion vessel and a safety valve must be in-
stalled by the customer (according to DIN 4751, Part 1).
The hydraulic integration diagram must be adhered to.
The dirt trap included in the scope of supply must be inserted in
the brine inlet of the heat pump by the customer.
The brine liquid must be produced prior to charging the system.
The liquid must have a brine concentration of at least 25 % to
ensure frost protection down to -14 °C.
Only monoethylene glycol or propylene glycol-based antifreeze
may be used.
The heat source system must be de-aerated and checked for
leaks.
ATTENTION!
The brine solution must contain at least a 25 % concentration
of a monoethylene glycol or propylene glycol-based
antifreeze, which must be mixed before filling.
ATTENTION!
A suitable de-aerator (micro bubble air separator) must be
installed in the heat source circuit by the customer.
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7.4 Domestic hot water connection
7.4.1 General
Installation and commissioning must be performed by an au-
thorised specialist company. The entire system, including all
factory-assembled components, should be inspected to ensure
that everything is working properly and that there is no leakage.
The enamelled steel complying in accordance with DIN 4753 is
suitable for normal drinking water.
The following materials can be used in the consumer's domes-
tic hot water system:
Copper
Stainless steel
Brass
Plastic
Depending on the materials used in the domestic hot water
system (customer installation), material incompatibility may
lead to corrosion damage. This especially applies to zinc-plated
materials and materials containing aluminium. If there is a risk
of water contamination during operation, it may be necessary
to install a filter.
The maximum permissible operating overpressure indicated on
the type plate must not be exceeded. It may be necessary to
mount a pressure reducer.
NOTE
To compensate for pressure fluctuations or water shocks in
the cold water network and to prevent unnecessary pressure
loss, a closed expansion vessel with flow fitting must be
mounted.
7.4.2 Commissioning
Ensure that the water supply is turned on and the cylinder is
filled before start-up.
The domestic hot water cylinder must be equipped with a certi-
fied, spring-loaded membrane safety valve by the customer. A
shut-off device must not be installed between the cylinder and
the safety valve. The operational reliability of the valve must be
checked at regular intervals. We recommend having an annual
service inspection carried out by a qualified specialist company.
452236.66.09 · FD 9912
English
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