9.4 Removing and refitting safety valve
Observe notes on servicing (see Ch. 9.1).
Removing
▶
Close flow and return shut off devices of heating circuit.
▶
Close flow and return shut off devices of hot water circuit.
▶
Drain hydraulic unit using the outlet tap.
✓
Hydraulic unit is depressurised.
▶
Remove retaining clip
1
with pliers.
▶
Pull safety valve
3
away.
▶
Separate outlet hose
4
from safety valve.
Refitting
▶
Connect new safety valve to outlet hose.
▶
Refit safety valve in reverse order, and
▪
ensure O ring
2
is seated correctly
▪
if necessary replace O ring,
▪
if necessary lubricate O ring with EPDM suitable lubricant
Installation and operating instruction
Hydraulic unit WWP L 7 ... L 15
9 Servicing
83279602 • 1/2014-05 • La
43-59
