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EN-8 452162.66.04 · FD 9912 www.gdts.one
English LAW 9IMR - LAW 14ITR
It is also recommended to install a shut-off device in the return
before integration into the indoor unit is carried out.
Where necessary, heating connection pipes for the heat pump
can also be laid underneath the cylinder, at its rear.
To integrate a second (external) heat generator in the heating
water circuit, it is necessary to cut out the thinned material area
underneath the unit cover.
The copper pipe link cable (in the flow direction) before the
electric heating must also be removed. If the electric heating is
to remain in the heating water circuit, the radiator must be
turned approximately 18° - 20° towards the cylinder. This is
necessary to ensure that connection can take place without ob-
struction (with pipe bend 28 and cap nut).
If the electric heating is to be removed from the heating circuit,
the heating pipes are connected directly to the thread connec-
tions 1 1/4" with a flat sealing connection. In this case, the con-
nected flow pipe should be fixed in the area where the radiator
mounting used to be (weld-free and secure).
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.
When the minimum heating water flow rate is undershot, the
plate heat exchanger in the refrigeration 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. 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 19.) must be guaranteed in every operating status. An in-
stalled 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
A method of manual drainage must be provided for heat pump
internal components which are exposed to frost. The frost pro-
tection function of the heat pump manager is active whenever
the heat pump manager and the heat circulating pump are
ready for operation. The system has to be drained if the heat
pump is taken out of service or if a power failure occurs. The hy-
draulic network should be operated with suitable frost protec-
tion if heat pump systems are implemented in buildings where
a power failure cannot be detected (vacation homes etc.).
NOTE
º
Chemical treatment to protect from rust should be carried out
by the installer.
**
** ca. 18° -20 °
Copper pipe link cable
34


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