Safety And Control Devices; Storage And Transport; General Information; Fork-Lift Truck (Or Lift Truck) Transport - Dimplex Bwp 30 Hlw Montage- Und Gebrauchsanweisung

2.4

2.4 Safety and Control Devices

The HW HP 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 HW HP is equipped with the following regulation 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 "Electrical Connection"). The water
is again heated until the set maximum temperature of the heating
element controller has been reached.
E-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 HW HP temperature di-
rectly upstream of the evaporator (air inlet temperature). 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 HW HP should generally be stored and transported 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 permis-
sible during transport and storage.
3.2 Fork-Lift Truck (or Lift Truck)
Transport
The HW HP must remain installed on the pallet during fork-lift
transport. The pump should be lifted slowly. Because of its high
centre of mass, the HW HP must be secured against canting. To
prevent damage, the HW HP must be lowered onto a level sur-
face.

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 HW HP ("heat pump" switch)
should not be operated until at least one hour after installation in
its final location.