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Coral E
LIST OF CONTENTS
1. INTRODUCTION
The Coral E thermal store is the modern approach for the provision of electrically
heated mains pressure hot water. The unit is free from building control
requirements, can be sited anywhere in the dwelling and requires no annual
servicing. An under working surface (Coral E 100 UWS) version of the 100 litre
model is available, and is suitable for installation under a working surface with a
minimum clearance of 850 mm.
A washing machine frame (Coral E 150 or 210 WMF) version is available of the
150 and 210 litre models, the units are supplied in a white steel finish and supplied
in two packages (a special Coral E and the frame). Note a minimum clearance of
225 mm must be allowed above the units.
A version of the 150 litre model is available as a packaged unit (Coral E 150
EBF) to accommodate an electric boiler (not supplied). A frame is supplied
complete with fixing brackets for the boiler. The boiler only provides space heating
via radiators, the Coral E is heated directly with its integral 3 kW immersion
heater. A sealed primary system option (Coral E 150 EBF/SS) is also available.
The unit is supplied in two pieces (a special Coral E and the frame).
Incoming mains cold water passes through a high efficiency heat exchanger coil
where it is heated by the thermal store and is distributed to all hot water outlets via
the thermostatic blending valve. The hot water and mains cold water are mixed in
the blending valve to achieve the desired temperature. The temperature can be
adjusted by the installer, as required, using the blending valve (see section 5.2). The
blending valve is fail safe in the event of a mains water supply failure.
The unit is designed to provide maximum performance and efficiency with the
thermal store being heated overnight (via the bottom immersion heater) using
the low price 'off-peak' tariff. The top immersion heater (used for daytime 'Boost')
is fitted directly underneath the coils allowing for fast recovery during peak
electricity periods. This 'Boost' heater is User controlled and must be operated
via a runback timer (Elson Part No. EP09101).
Both immersion heaters are factory set for maximum performance (top at 75°C
and bottom at 85°C). A User accessible manual reset safety thermostat is
connected to the bottom (overnight) heater switching it off in the unlikely event of
an overheat situation.
Heat loss from the thermal store is minimised by the use of a 50 mm thick HCFC
free polyurethane injected foam insulation.
Water lost from the thermal store by evaporation is replaced via the feed and
expansion tank fitted within the unit.
The standard Coral E is available in either white metal finish or hardboard and
is delivered in a single package of the following sizes:- (100 litre model - 960 x
520 x 650 mm, weighing 40 kg), (100 UWS model - 845 x 610 x 650 mm,
weighing 40 kg), (150 litre model - 1400 x 525 x 650 mm, weighing 60 kg),
(210 litre model - 1400 x 610 x 650 mm, weighing 66 kg).
For Service queries contact our Service Helpline on 08450 770087. For Technical
Help or Sales queries contact 0191 4270777.
1. Introduction ....................................................Page 2
2. Important Notes....................................................... 2
3. Technical Data ......................................................... 3
4. Installation ............................................................... 4
5. Commissioning ....................................................... 5
6. Servicing/replacement of parts .............................. 6
7. Spare Parts List ....................................................... 7
8. Wiring Diagrams ...................................................... 7
9. Fault Finding............................................................ 7
10. User's Instructions .................................................. 8
Typical Coral E WMF
installation
Coral E EBF/SS
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