Siting The Unit; Schematic Diagram - EHC NEPTUNE NINDSL90L Installation & Maintenance Instructions Manual

SITING THE UNIT

The EHC Neptune 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 EHC Neptune 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. EHC Neptune
must be installed VERTICALLY on a lat base capable
of supporting the weight of the cylinder when full. See
technical speciication section (page 16) for weights. The
minimum recommended cupboard size is 650mm square.

SCHEMATIC DIAGRAM

HOT OUTLET
SECONDARY RETURN CIRCUIT
( 210, 250 & 300 L SIZES )
NON
BRONZE RETURN
PUMP VALVE
2 PORT
VALVE
BOILER
FLOW
BOILER
RETURN
IMMERSION
HEATER
TEMPERATURE
& PRESSURE
RELIEF VALVE
TUNDISH
DUAL
STAT
UNVENTED HOT WATER CYLINDERS
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taken to ensure that they can be withdrawn for servicing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.
EXPANSION
RELIEF
VALVE
PRESSURE
NON
REDUCING
RETURN
VALVE
VALVE
EXPANSION
VESSEL
WITH WALL
BRACKET
COLD
INLET VIA
DRAIN
EHC NEPTUNE
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
COLD
above the drain elbow.
MAIN
ISOLATING
VALVE
BALANCED
COLD
CONNECTION
04