Table of Contents
Advertisement
2.3
Safety Devices
The HPWH is equipped with the following safety features:
2.3.1
High-Pressure Pressostat (HP)
The high-pressure pressostat protects the heat pump from excessive operating pressures in the refrigeration
cycle. In the case of a malfunction, the pressostat switches off the heat pump. The heat pump is restarted
automatically as soon as the pressure in the refrigeration cycle has dropped to an acceptable level.
2.3.2
Safety Temperature Limiter for Immersion Heater (STL)
The STL protects the hot water installation from excessive tem-
perature increases.
It is secured to the switch box panel, and the associated sensor is
located in the well of the immersion heater.
When the preset switching value (99 °C) is exceeded, the immer-
sion heater is switched off.
The immersion heater cannot be restarted unless the hot water
temperature has fallen to ≤ 90 °C and the reset button (Fig. 2) on
the STL has subsequently been pressed.
Important Note!
The safety temperature limiter can be accessed after the
-
operating panel has been removed. Any interventions may therefore only be performed by qualified per-
sons. Prior to opening the unit, the appliance must be disconnected from the power supply!
3.
Controlling and Operating Concept
3. 1 Operating Panel of HPWH
Analog display
of hot water temperature
Fig. 3: Operating panel of HPWH
'Heat pump'
switch
Reset button
Bild 2 : STB
'Immersion
'Heat exchanger'
heater'
switch
Hot water
temperature dial
Partition
STL
85°
B3
30°
F2
Operating panel
switch
Page 5 of
20
Advertisement
Table of Contents
