4
LIMITATIONS
The PremierPlus cylinder should not be used in
association with any of the following:
Solid fuel boilers or any other boiler in which the
•
energy input is not under effective thermostatic
control, unless additional and appropriate
safety measures are installed.
Ascending spray type bidets or any other class
•
1 back syphonage risk require that a type A air
gap be employed.
Steam heating plants unless additional and
•
appropriate safety devices are installed.
Situations where maintenance is likely to be
•
neglected or safety devices tampered with.
Water supplies that have either inadequate
•
pressure or where the supply may be
intermittent.
Situations where it is not possible to safely pipe
•
away any discharge from the safety valves.
In areas where the water consistently contains
•
a high proportion of solids, e.g. suspended
matter that could block the strainer unless
adequate filtration can be ensured.
OPERATIONAL SUMMARY
Maximum PremierPlus pressure
16 bar
Operating pressure
3.5 bar
Expansion vessel pressure
3.5 bar
Expansion relief valve setting
6 bar
T&P relief valve setting
90°C/10 bar
Maximum primary circuit (pressure 3 bar (indirect
only)
Storage capacity
See Table1
Weight when full
See Table1
INSTALLATION – GENERAL
PIPE FITTINGS
All pipe fittings are made via 22mm compression
fittings directly to the unit. The fittings are threaded
3/4”BSP male parallel should threaded pipe
connections be required.
COLD FEED
A 22mm cold water supply is recommended,
however, if a 15mm (1/2”) supply exists, which
provides sufficient flow, this may be used (although
more flow noise may be experienced).
A stopcock or servicing valve should be incorporated
into the cold water supply to enable the PremierPlus
cylinder and its associated controls to be isolated
and serviced.
COLD WATER COMBINATION VALVE ASSEMBLY (FIG.
2, page 4)
The Cold Water Combination Valve can be connected
anywhere on the cold water PremierPlus supply prior
to the Expansion Vessel (see Fig. 6, page 10). The Cold
Water Combination Valve is installed as a complete
one-piece unit. The valve incorporates the Pressure
Reducer, Strainer, Expansion Valve and Check Valve.
Ensure that the valve is installed with the direction of
flow arrows pointing in the right direction. No other
valves should be placed between the Cold Water
Combination Valve and the PremierPlus unit. The
Expansion Valve connection must not be used for
any other purpose.
Expansion valve
Cold mains
connection
(22mm)
Expansion valve
outlet (15mm)
Outlet connection
(22mm)
Pressure reducing
valve cartridge
(3.5bar)
Fig. 2: Cold water combination valve
DRAIN TAP
A suitable draining tap should be installed in the cold
water supply to the PremierPlus cylinder between
the expansion valve (see Fig. 6) and the heater at as
low a level as possible. It is recommended that the
outlet point of the drain pipework be at least 1 metre