Mains Supplies - Worcester GREENSTAR 25CDi GC Instruction Manual

MAINS SUPPLIES
ELECTRIC SUPPLY:
f • Supply: 230V - 50Hz
(See Technical Data for IP ratings.)
• Cable: PVC insulated 0.75mm 2
(24 x 0.2mm) temperature rated to 90"C.
• Extemal3A fuse to BS1362.
• The appliance must be earthed.
• All pipes to the boiler must be cross-bonded.
• Wiring must comply with lEE wiring regula ­
tions and any local regulations which may
apply to fIXed wiring to a stationary appliance.
GAS SUPPLY:
• Boilers using NG must be connected to a
govemed meter.
• LPG boilers must
be
connected to a
regulator.
• Installation and connection of the gas sup­
ply to the boiler must
be
in accordance with
8S6891.
• Under no circumstances should the size of
the gas supply pipe
be
less than that of the
appliance inlet connection.
• The meter or regulator and pipework to the
meter must
be
checked, preferably by the
gas supplier, to ensure it is in good working
order and can meet the gas flow and pres ­
sure requirements in addition to the demand
from any other appliance being served. This
does not include the pipework from the
meter to the boiler.
• For olive connections we recommend using
gas
pipes with minimum 0.9 mm wall thickness.
WATER SUPPLY:
Water Mains Pressure:
• Minimum mains water pressure 1.5 up to
2.5 bar (see technical
data
on page 6) for
maximum performance.
• Maximum mains fed water pressure 10 bar.
If necessary, fit a pressure reducing valve.
IMPORTANT: Non-return, back flow pre­
MAINS WATER EXPANSION VESSEL:
vention devices (including those associat ­
A - Mini expansion vessel, part No.7 716 102 105
ed with water meters) fitted to the mains
8 - Mains water inlet pipe
water supply can cause a pressure build
C - Non-return valve
up which could damage the boiler and
D - Boiler
other household appliances.
• Where the mains water supply has a non­
return, back flow prevention valve fitted, a
mini expansion vessel (A) should
be
con ­
nected to the mains water inlet pipe (B)
B
C
between the non-return valve (C) and the
,
.
\
\
\
\
,
\
boiler (D) as shown opposite.
\
\ \
Us~ in ~ard ~ater ~real>: ~
Normally there
is
no need for water treatment
to prevent scale formation as the maximum
II
temperature of the
DHW
heat exchanger is
limited by the electronic control circuit
In areas where the temporary water hardness
exceeds 200 ppm, consideration may need to
be given to the fitting of a scale prevention
device. In such circumstances, the advice of
the local water authority should be sought
INSTALLATION & SERVICING INSTRUCTIONS FOR
W0~CESTER
80SCH GREENSTAR 25CDvaOCDi/37CDil42 CDi
~ORCESTER
MAINS SUPPLIES
57'20613700. (2006/11)
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