2 Notes on the documentation
8
Installation and maintenance instructions geoTHERM 0020250180_00
2
Notes on the documentation
2.1
Observing other applicable documents
▶
You must observe all the operating and installation in-
structions included with the system components.
2.2
Storing documents
▶
Pass these instructions and all other applicable docu-
ments on to the system operator.
2.3
Validity of the instructions
These instructions apply to products with the following type
designations and article numbers only:
Type designation
Art. no.
VWS 36/4.1 230 V
0010022462
▶
You can find the 10-digit article number for the heat
pump on the plate that is located behind the front flap.
The seventh to sixteenth digits of the serial number on
the data plate form the article number.
3
Product description
3.1
Safety devices
3.1.1
Frost protection function
The frost protection function for the system is controlled via
the system control. If the system control fails, the heat pump
guarantees limited frost protection for the heating circuit.
3.1.2
Protection against low heating water
pressure
This function continuously monitors the pressure of the heat-
ing water in order to prevent a possible loss of heating water.
An analogue pressure sensor switches off the heat pump
if the water pressure drops below the minimum pressure.
It switches the heat pump on again if the water pressure
reaches the operating pressure.
–
Minimum heating water pressure:
≥
0.05 MPa
(
≥
0.50 bar)
–
Heating water operating pressure:
≥
0.07 MPa
(
≥
0.70 bar)
3.1.3
Brine pressure detector
The brine loss protection system continuously monitors the
fluid pressure in the environment circuit in order to prevent a
possible shortage of fluid.
An analogue pressure sensor switches off the heat pump
if the fluid pressure drops below the minimum pressure.
It switches the heat pump on again if the fluid pressure
reaches the operating pressure.
–
Minimum brine fluid pressure:
≥
0.05 MPa (
≥
0.50 bar)
–
Brine fluid operating pressure:
≥
0.07 MPa (
≥
0.70 bar)
3.1.4
Freeze protection
This function prevents the evaporator from freezing when the
heat source temperature drops below a certain value.
The outlet temperature of the heat source is constantly
measured. If the outlet temperature of the heat source falls
below a certain value, the compressor temporarily switches
off and displays a status message. If this fault occurs three
times in succession, the unit is permanently shut down and
displays a fault message.
3.1.5
Pump- and valve-blocking protection
system
This function prevents the pumps for heating water and
brine and all diverter valves from sticking. The pumps and
the valves, which were out of operation for 23 hours, are
switched on for 10 - 20 seconds, one after the other.
3.1.6
High-pressure pressure switch in the
refrigeration circuit
The high-pressure pressure switch shuts down the heat
pump if the pressure in the refrigeration circuit is too high.
If the pressure in the heat pump's refrigeration circuit ex-
ceeds the maximum pressure, the high-pressure pressure
switch temporarily shuts down the heat pump. Following
a waiting period, another attempt is made to start the heat
pump. After eleven failed start attempts in succession, a fault
message is displayed.
–
Max. refrigeration circuit pressure: 4.15 MPa (g) (41.50
bar (g))
–
Waiting period: 5 minutes (after the first occurrence)
–
Waiting period: 30 minutes
(after the second and every further occurrence)
The fault counter is reset if both of the following conditions
are met:
–
Heat requirement without switching off prematurely
–
60 minutes of uninterrupted operation
3.1.7
Pressure sensor in the heating circuit and
brine circuit
The heating circuit and brine circuit each have a pressure
sensor which measures the actual pressure.
The pressure can be read in the heat pump's display. If the
pressure in either of the circuits falls below the minimum
operating pressure, a fault message is shown in the heat
pump's display.
–
Heating water operating pressure:
≥
0.07 MPa
(
≥
0.70 bar)
–
Brine fluid operating pressure:
≥
0.07 MPa (
≥
0.70 bar)
