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User Instructions
Warnings
IF WATER DISCHARGES FROM THE CYLINDER
TEMPERATURE/PRESSURE RELIEF VALVE
SHUT DOWN THE BOILER, HEAT PUMP AND
ANY ADDITIONAL HEAT SOURCES. DO NOT
TURN OFF ANY WATER SUPPLY. CONTACT A
COMPETENT INSTALLER OF UNVENTED WATER
HEATERS TO CHECK THE SYSTEM.
DO NOT TAMPER WITH ANY OF THE SAFETY
VALVES FITTED TO THE SYSTEM. IF A FAULT
IS SUSPECTED CONTACT A COMPETENT
INSTALLER.
This product should be serviced annually to optimise
its safety, efficiency and performance. The service
engineer should complete the relevant Service Record
on the Checklist after each service.
The service record may be required in the event of any
warranty work.
Flow Performance
When initially opening hot outlets a small surge in
flow may be noticed as pressures stabilise. This is
quite normal with unvented systems. In some areas
cloudiness may be noticed in the hot water. This is
due to aeration of the water which is quite normal and
will quickly clear.
16
Boost Immersion Heater
A boost immersion heater is also provided for use
should the Heat Pump be shut down for any purpose.
The immersion heater control temperature is set using
the immersion heater thermostat - see Fig. 8, page 13.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
Operational Faults
Operational faults and their possible causes are
detailed in the Fault Finding section of this manual. It
is recommended that faults should be checked by a
competent installer.
The air volume within the expansion vessel will
periodically require recharging to ensure any expanded
water is accommodated within the unit. A discharge
of water INTERMITTENTLY from the pressure relief
valve will indicate the air volume has reduced to a point
where it can no longer accommodate the expansion.
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