15
USER INSTRUCTIONS
WARNINGS
IF WATER ISSUES FROM THE TEMPERATURE/PRESSURE
RELIEF VALVE ON THE PREMIERPLUS CYLINDER
SHUT DOWN THE BOILER. DO NOT TURN OFF ANY
WATER SUPPLY. CONTACT A COMPETENT INSTALLER
FOR UNVENTED WATER HEATERS TO CHECK THE
SYSTEM.
DO NOT TAMPER WITH ANY OF THE SAFETY VALVES
FITTED TO THE PREMIERPLUS SYSTEM. IF A FAULT IS
SUSPECTED CONTACT A COMPETENT INSTALLER.
BENCHMARK
The PremierPlus cylinder is covered by the Benchmark
Scheme which aims to improve the standards of
installation and commissioning of domestic heating
and hot water systems in the UK and to encourage
regular servicing to optimise safety, efficiency and
performance.
Benchmark is managed and promoted by the Heating
and Hotwater Industry Council. For more information
visit www.centralheating.co.uk.
Please ensure that the installer has fully completed
the Benchmark Checklist (Page 22 and 23) of this
manual and that you have signed it to say that you
have received a full and clear explanation of its
operation. The installer is legally required to complete
a commissioning checklist as a means of complying
with the appropriate Building Regulations (England
and Wales).
All installations must be notified to Local Area Building
Control either directly or through a Competent
Persons Scheme. A Building Regulations Compliance
Certificate will then be issued to the customer who
should, on receipt, write the Notification Number on
the Benchmark Checklist.
This product should be serviced regularly to optimise
its safety, efficiency and performance. The service
engineer should complete the relevant Service Record
on the Benchmark Checklist after each service.
The Benchmark Checklist may be required in the
event of any warranty work and as supporting
documentation relating to home improvements
in the optional documents section of the Home
Improvements Pack.
TEMPERATURE CONTROLS – DIRECT UNITS
IMMERSION HEATER(S)
A combined adjustable thermostat and thermal
cut-out is provided for each immersion heater. The
thermostat is factory set to give a water storage
temperature of approx. 55° to 60°C. Access to the
thermostat can be made by opening the immersion
heater cover - DISCONNECT THE ELECTRICAL SUPPLY
BEFORE OPENING THE COVER(S). Temperature
adjustment is made by inserting a flat bladed
screwdriver in the slot on the adjustment disc on
top of the thermostat and rotating. The adjustment
range 1 to 5 represents a temperature range of 10°
to 70°C (60°C will be approximately position 4). If in
any doubt contact a competent electrician.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
TEMPERATURE CONTROLS - INDIRECT UNITS
The PremierPlus cylinder units are fitted with an
indirect thermostat and thermal cut-out. These
controls must be wired in series with the 2 port
motorised zone valve supplied to interrupt the flow
of primary water around the heat exchanger coil
when the control temperature has been reached.
The controls are located within the lower terminal
housing along with the immersion heater thermostat.
The thermostat is factory set to give a water storage
temperature of approx. 55° to 60°C. Access to the
thermostat can be made by opening the terminal
housing cover - DISCONNECT THE ELECTRICAL
SUPPLY BEFORE OPENING THE COVER. Temperature
adjustment is made by inserting a flat bladed
screwdriver in the adjustment knob and rotating. The
minimum thermostat setting is 10°C. The adjustment
range 1 to 5 represents a temperature range of 30°
to 70°C (60°C will be approximately position 4). If in
any doubt contact a competent electrician.
An immersion heater is also provided for use should
the indirect heat source be shut down for any
purpose. The immersion heater control temperature
is set using the immersion heater thermostat.
DO NOT bypass the thermal cut-out(s) in any
circumstances.
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 is quite normal and will
quickly clear.
OPERATIONAL FAULTS
Operational faults and their possible causes are
detailed in the Fault Finding section of this book. 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 expanded
water is accommodated within the unit. A discharge of
water
INTERMITTENTLY
from the expansion valve will
indicate the air volume has reduced to a point where
it can no longer accommodate the expansion.