Stuart Turner Monsoon Extra S3.0 bar Single - Manual (Page 3)

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Hot Water Installations
The preferred pump location is at floor level next to the hot water cylinder or a level that
is below the secondary tapping that feeds the pump. This will ensure the pump has access
to an air free water supply which is important for trouble free operation (Fig. 2).
Preferred Pump Location (shaded
area). Pump at a level below
draw off tapping in cylinder.
If it is not possible to locate the pump in the preferred area due to site limitations and it is
necessary to position the unit in the loft, or in a position above the secondary tapping that
feeds the pump, then there is an increased risk of air locks. This risk must be eliminated.
The following measures are suggestions that may overcome the problem:
1) A “U” bend or downward loop in the supply pipe to the pump of 350 mm depth before
rising to the pump should ensure the cylinder vents its air up the expansion pipe not
up the pump feed (Fig. 3).
2) An alternative to the above would be the installation of an automatic air vent situated
at the top of a vertical pipe run, directly connected to the pump discharge. This will
ensure any air collecting in the pump is automatically vented.
Note: If installed in loft there must
be a height of 200 mm from base
of tank to pump.
Least Preferred Pump Location
(shaded area). Pump located
above the hot cylinder can
increase the risk of air locks.
Fig. 2
Fig. 3
10
metres max
1
metre min
10
metres max
1
metre min
hot water
services
hot water
services
100
mm min
preferred area
200
mm
min
Least preferred area
350
mm
min