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Cold water control pack
IMPORTANT INSTALLATION NOTE:
WHERE THE INLET SUPPLY TO THE PRESSURE
REDUCING VALVE (PRV) IS ROUTED THROUGH
A HEATED SPACE AND IS FITTED WITH A CHECK
VALVE OR OTHER FITTING THAT WOULD
PREVENT BACK FLOW, HIGH PRESSURES CAN
BE EXPERIENCED IN THE INLET PIPE DUE TO
WARMING THAT CAN CAUSE DAMAGE TO THE
PRV OR OTHER FITTINGS ON THE INLET SUPPLY.
IN THESE CIRCUMSTANCES, THE INSTALLATION
OF A MEANS TO ACCOMMODATE EXPANSION
AND THUS LIMIT THE PRESSURE RISE IN THE
INLET PIPE IS RECOMMENDED.
Figure 6: Pressure Reducing Valve
Mains in
22mm compression connections
Figure 7: Cold water controls
Stopcock can be grouped with either
3 bar Pressure Reducing Valve or
8 bar Pressure Relief Valve on the
inlet to either valve only
Stopcock
14
Pressure reducing valve
cartridge (3 bar)
Take note of ow
direction
Outlet to Mega o
8 bar Pressure Relief
Valve
3 bar Pressure
Reducing Valve
CAUTION
Flush
`
connection to remove all flux and
debris prior to fitting the inlet controls.
Failure to do this may result in
irreparable damage to the controls and
will invalidate any warranty.
The cold water control pack can be connected
`
anywhere on the cold water cylinder supply.
The Control pack incorporates the pressure
`
reducing valve and isolation valve.
The pressure setting is set to 0.3MPa/3.0 bar.
`
The valve can be fitted in any orientation to suit
`
the installation as long as the valve is installed with
the direction of flow arrows pointing in the correct
direction.
The expansion relief valve should be installed with
`
the discharge pipework in either the horizontal
position or facing downwards.
No other valves should be placed between the cold
`
pressure reducing valve and the appliance.
Primary circuit control
The 2 port motorised valve supplied with the
`
appliance MUST be fitted on the primary flow to the
appliance heat exchanger and wired such that in
the event of the appliance overheating it will close
the primary circuit.
Primary circulation to the appliance heat exchanger
`
must be pumped; gravity flow to the appliance heat
exchanger WILL NOT WORK.
It is recommended that an air bleed or automatic
`
air vent is incorporated in the primary return pipe
work close to the unit.
Boiler flow temperature should be set to 80°C
`
(peak temperature not to exceed 88°C).
supply
pipework
before
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