6
Installation and maintenance instructions 0020285063_05
2
Notes on the documentation
2.1
Observing other applicable documents
▶
Always observe all the operating and installation instruc-
tions included with the system components.
2.2
Storing documents
▶
Pass these instructions and all other applicable docu-
ments on to the end user.
2.3
Validity of the instructions
These instructions apply only to:
Unit
–
article number
aroSTOR VWL B 200/5 UK
0010024440
aroSTOR VWL B 270/5 UK
0010028218
Kit, unvented tank 18L HP Vaillant
0020230777
Temperature and pressure relief valve
0020293791
3
Product description
These products have been tested in accordance with stand-
ard EN12897.
3.1
Product design
1
2
3
4
5
1
Cold water connection
2
Domestic hot water
connection
3
Temperature and pres-
sure relief valve
4
Air supply
5
Air removal
3.2
Operation
The unit includes the following circuit:
–
The refrigerant circuit releases heat into the domestic hot
water cylinder by means of evaporation, compression,
condensation and expansion
3.2.1
Heating mode
1
2
4
3
5
6
1
Evaporator
2
Compressor
3
Fan
4
Defrosting valve
5
Thermostatic expansion
valve
6
Condenser
3.2.2
Defrosting mode
1
2
4
3
5
6
1
Evaporator
2
Compressor
3
Fan
4
Defrosting valve
5
Thermostatic expansion
valve
6
Condenser
