EN-8 452162.66.04 · FD 9606
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LAW 6IMR - 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 elec-
tric heating must also be removed. If the electric heating is to re-
main in the heating water circuit, the radiator must be turned ap-
proximately 18° - 20° towards the cylinder. This is necessary to
ensure that connection can take place without obstruction (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 ac-
count 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 in-
ternal components which are exposed to frost. The frost protec-
tion 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 hydraulic
network should be operated with suitable frost protection if heat
pump systems are implemented in buildings where a power fail-
ure cannot be detected (vacation homes etc.).
NOTE
Chemical treatment to protect from rust should be carried out by the
installer.
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Summary of Contents for LAW 14IMR
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