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General Requirements
Wellmaster Cylinders
Only JOULE Wellmaster cylinders may be installed on a well, private water scheme or any water source that
does not come from the public mains.
Water supplied to the cylinder must conform to the water chemistry table on the previous page. A descaler
on the cold water feed may be used if required.
If any of the water parameters are higher than set out in the table
including total hardness regardless of whether or not it is fed from a
main water connection a Joule Wellmaster cylinder must be used.
If any of the water parameters are higher than set out in the table including Total Hardness regardless of whether
or not it is fed from a main water connection a JOULE Wellmaster cylinder must be used.
Siting The Unit
This unit can supply outlets above it or at some distance from it but any outlets above the unit will reduce the
available outlet pressure by 0.1 bar for every 1m of height dfference. The maximum length of the “dead leg”
should be as stated in the Water Supply (Water Fittings) Regulations 1999 G18.7, in particular to the area of
most frequent use.
Particular attention is needed if siting in a garage or outbuilding as the unit should be protected from frost.
All exposed pipework must be insulated. The unit must be installed
upright
on a base capable of supporting
its weight when full.
Sufficient access to allow maintenance of the valves should be considered. In addition the immersion heat-
ers are 400mm in length and this distance should be considered to allow withdrawal for servicing if re-
quired. The discharge pipework from the safety valves should fall continuously and terminate safely.
Negative pressure may form in cylinders installed very high in a building. To counteract this, an anti-vacuum
valve can be installed to prevent damage to the cylinder. The anti-vacuum valve ensures pressure compen-
sation as a result of air flowing into the cylinder.
Connecting To The Cylinder
All of the pipework connections on the cylinder are female threaded. Upon filling / commissioning, ensure
all connections are completely watertight.
No control or isolation valve should be fitted between the expansion
relief valve and the storage cylinder. The relief valve connections should
not be used for any other purpose.
