Maintenance
EXPANSION RELIEF VALVE
You can find the expansion relief valve on the incoming
pipe (cold water) to VPB S/ VPBS S.
The water heater’s expansion relief valve sometimes
releases a little water after hot water usage. This is be-
cause the cold water, which enters the water heater to
replace the hot water, expands when heated, causing
the pressure to rise and the expansion relief valve to
open.
The function of the expansion relief valve must be
checked regularly by a person who is competent for the
task. Perform the checks as follows:
1.
Open the valve.
2.
Check that water is flowing through it.
3.
Close the valve.
NOTE
If this pressurised water heater develops a
fault, e.g. a flow of hot water from the overflow
pipe, turn the heat pump off and contact your
installer.
NOTE
Do not remove or adjust any components that
are part of this pressurised water heater. Con-
tact your installer!
TIP
The expansion relief valve is not delivered with
VPB S/ VPBS S. Contact your installer if you
are unsure how to check it.
EMPTYING
Water heater
Draining is performed through the siphon (using hose)
in the cold water connection (XL3).
Charge coil
Draining is performed through the siphon (using hose)
in the docking connection, return to heat pump (XL9).
Solar coil
Draining is performed through the siphon (using hose)
in the connection, return to solar heating system (XL14).
VPB S300
626
600
30
126
195
478
391
25-50
1475
80
100
560
440
XL3
XL9
VPBS S300
626
600
28
43
205
126
553
478
1
3
391
25-50
1
775
80
560
440
168
80
XL3
XL9
XL14
XL4
SERVICE
If servicing is required, contact your installer for suitable
measures.
Caution
You need the product's (14 digit) serial number
for servicing and support.
VPB S/ VPBS S must be serviced once a year by com-
petent and qualified personnel, such as a NIBE a service
engineer or other qualified professional.
9
Chapter 2 | For the User
NIBE VPB S/ VPBS S
2 For the User
