Stuart Turner Monsoon U1.5 bar Twin Installation Instructions Manual page 16

Fig. 15
5. The pressure vessel air pre-charge does not require routine maintenance. Should
ever the need arise for the vessel to have its air pre-charge checked or replenished, it
should be carried out as follows: -
a) Isolate pump electrically.
b) Isolate hot and cold water supplies via the integral pump isolating valve located in
the flexible hoses (see pump connections section).
c) Release system water pressure by opening a system outlet (tap).
d) Check air pre-charge at Schrader valve (Fig. 16) using a tyre pressure gauge.
Inlet fitting
'O'-ring
Inlet port
Location detail
Model
U1.5 bar Twin
U2.0 bar Twin
U3.0 bar Twin
U4.0 bar Twin
U4.5 bar Twin
M4 screws
Manifold clamp
Vessel Pressure
kPa bar
90 0.9
130 1.3
- 16 -
Strainer
psi
13.0
18.5
Cont....