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2.4
2.4 Safety and Control Devices
The hot-water heat pump has the following safety features:
High-pressure switch
The high-pressure switch protects the heat pump against imper-
missibly high operating pressure in the refrigerant circuit. In the
event of fault, the pressure switch will switch off the heat pump.
The heat pump is restarted automatically if there has been a
pressure drop in the refrigerant circuit.
Safety temperature limiter for heating element
(STL)
The STL protects the hot-water installation against impermissible
temperature increases.
The heating element is switched off if the set switching value
(99 °C) is exceeded.
The heating element cannot be re-started until the hot-water tem-
perature has decreased to 90 °C and the reset button (see il-
lustration) on the STL is pressed (this may be done by qualified
personnel only).
The hot-water heat pump is equipped with the following regula-
tion and control devices:
Heating element temperature controller (TC)
The heating element temperature controller regulates the hot
water temperature during heating element operation. The maxi-
mum controller temperature is factory set to 65 °C (the controller
and the STL are installed together in a casing). Temperature set-
tings can be changed using suitable tools (see illustration).
Changes to this setting may be carried out by qualified personnel
only!
In automatic operation (activated via air temperature thermostat),
the water is heated by the heating element until the set value has
been reached (by the heat pump temperature controller). In con-
trast to heat pump operation only, a smaller amount of water is
heated up in order to minimise heating element operating peri-
ods. In continuous manual operation, the hot water is heated until
the set maximum temperature of the heating element has been
reached. The heating element may optionally be controlled via
an external switch (see Point 5.3 "Electrical Connection"). The
water is again heated until the set maximum temperature of the
heating element controller has been reached.
EN-4
Heat pump temperature controller
Temperature control in the water cylinder and the regulation for
compressor operation is carried out by the temperature control-
ler. This controller measures the hot-water temperature via a
sensor and controls it in relation to the set value. The desired
temperature level (set value) is set via the rotary knob on the
control panel.
Air temperature thermostat
This thermostat sensor measures the hot-water heat pump tem-
perature directly upstream of the evaporator (air inlet tempera-
ture). If the temperature falls below the set value (8 ±1,5 °C,
dead-band value 3 K), hot water preparation automatically
switches from heat pump operation to heat element operation.
3
Storage and Transport
3.1 General Information
The hot-water heat pump should generally be stored and trans-
ported wrapped up, upright and containing no water. If handled
carefully, the unit can be transported over short distances with a
max. tilt angle of 45°. Ambient temperatures between -20 and
+60 °C are permissible during transport and storage.
3.2 Fork-Lift Truck (or Lift Truck)
Transport
The hot-water heat pump must remain installed on the pallet dur-
ing fork-lift transport. The pump should be lifted slowly. Because
of its high centre of mass, the hot-water heat pump must be se-
cured against canting. To prevent damage, the hot-water heat
pump must be lowered onto a level surface.
3.3 Manual Transport
Use the wooden pallet for manual transport. A second or third
carrying position can be determined with the help of ropes or car-
rying slings (these may be positioned around the ventilator case
and fixed to the water pipe nipples). If the pump is transported in
this manner (or with a sack barrow), the max. tilt angle of 45°
must not be exceeded (see illustration). If the pump can only be
transported in a tilted position, the hot-water heat pump ("heat
pump" switch) should not be operated until at least one hour after
installation in its final location.
ATTENTION!
The device cover cannot be used for carrying (the cover cannot withstand
larger forces!)
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