SITING THE UNIT
STAINLESS UV can supply outlets above it or at some
distance from it. Site the unit to minimise “dead leg”
distances, especially to the point of most frequent use.
Outlets above the STAINLESS UV will reduce the outlet
pressure available by 0.1 bar for every 1m of height
difference. The unit should be protected from frost.
Particular care is needed if sitting in a garage or outbuilding.
All exposed pipework should be insulated. STAINLESS
UV must be installed VERTICALLY on a flat base capable
of supporting the weight of the cylinder when full. See
technical specification section (page
27-28
) for weights. The
minimum recommended cupboard size is 650mm square.
NOTES:
The pressure reducing
valve, non-return valve
and expansion relief valve
are combined together in
the inlet control set.
On 60 – 180 litre sizes
there is no dedicated
secondary return boss
and the secondary return
circuit should be tee’d into
the cold feed pipe just
above the drain elbow.
SCHEMATIC DIAGRAM
Access for maintenance of the valves should be considered.
Consideration should be given to position of discharge
pipes (tundish), drain valves - shall be positioned away from
electrical components.
The immersion heaters are 375mm long and care should be
taken to ensure that they can be withdrawn for servicing
if required. The discharge pipework from the safety valves
should fall continuously and terminate safely.
IMMERSION
HEATER
COLD
MAIN
ISOLATING
VALVE
PRESSURE
REDUCING
VALVE
NON
RETURN
VALVE
EXPANSION
RELIEF
VALVE
TUNDISH
TEMPERATURE
& PRESSURE
RELIEF VALVE
BALANCED
COLD
CONNECTION
COLD
INLET VIA
DRAIN
NON
RETURN
VALVE
BRONZE
PUMP
SECONDARY RETURN CIRCUIT
( 210, 250 & 300 L SIZES )
DUAL
STAT
2 PORT
VALVE
BOILER
FLOW
BOILER
RETURN
HOT OUTLET
EXPANSION
VESSEL
WITH WALL
BRACKET
04
STAINLESS UV
UNVENTED HOT WATER CYLINDERS
