Hot Water Supply; Gas Supply; Electrical; Installation - Worcester WR325 RSF Installation And Servicing Instructions

7

Hot Water Supply

7.1 The following are general requirements and, if necessary,
reference should be made to the local Water Company before
fitting the appliance.
7.2 MAINS COLD WATER INLET. Devices capable of
preventing the flow of expansion water must not be fitted unless
separate arrangements have been made.
7.3 The final 600mm of the mains cold water connection to
the appliance should be made in copper tube only.
7.4 The appliance is suitable for a mains pressure of up to
12 bar (180 lb/in2).
7.5 The appliance is fitted with a mains supply isolating valve.
7.6 The maximum domestic hot water flow rate is 12.0 litres/
min (±15%) (2.7 gallons/min).
7.7 In winter (when the mains inlet water temperature is
lower) a reduced flow rate at the taps may be required to achieve
the type of hot water delivery temperature available in warmer
weather.
7.8 It is suggested that long pipe runs to the taps or shower
should be insulated to prevent the rapid cooling of domestic hot
water after a tap or shower has been turned off.
7.9 Hot and cold taps and mixing valves used with this
appliance must be suitable for operating at mains pressure and
temperatures of 65°C.
7.10 No anti-syphonage arrangements are necessary except
for some loose head showers. See also Section 8.11 following.
7.11 Thermostatically controlled or pressure equalising
shower valves will guard against the flow of water at too high a
temperature.
7.12 The head of a loose head shower must not fall closer
than 25mm (1in) above the top edge of the bath to prevent its
immersion in bath water. Alternatively the shower must be fitted
with an anti-syphonage device at the point of the flexible hose
connections.
7.13 The supply of hot and cold mains water direct to a bidet
is permitted, (subject to local Water Company requirements),
provided that the bidet is of the over-rim flushing type. The
outlet(s) should be shrouded and unable to have any temporary
hand held spray attached. No anti-syphonage arrangements
are necessary.
8

Gas supply

The appliance requires 1.0 m
supply pipes must be capable of supplying this quantity of gas
in addition to the demand from any other appliances being
served. Refer to BS 6891 for further information.
The meter governor should deliver a dynamic pressure of 20
mbar (8 in w.g.) at the appliance.
The complete installation, including the gas meter, must be
tested for soundness and purged. Refer to BS 6891.
A gas service cock must be fitted before each appliance, a gas
service cock is supplied with every appliance.
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Important: if the 1.0 m /hr gas rate to the appliance cannot be
reached, the specified hot water conditions will not be achieved.
This could result in customer complaints. Always ensure that
the gas supply is adequate.
Supplied By www.heating spares.co Tel. 0161 620 6677
3 /hr of gas. The gas meter and
9

Electrical

See Fig. 10.
9.1 MAINS SUPPLY.
230 V ~, 50 Hz, 65 watts.
External Fuse: 3A.
Internal Fuses: T1.25A, 250V and T0.8A, 250V.
9.2 It must be possible to completely isolate the appliance.
9.3 The following connection alternatives must be used:
A 3 amp fused three-pin plug and unswitched shuttered socket
outlet (both complying with the requirements of BS 1363) or a
double pole isolator with a contact separation of 3mm in all poles
and supplying the appliance and controls only.
9.4 The appliance must be earthed.
9.5 Mains Cable. 0.75mm
16.
9.6 The wiring between the appliance and the electrical
supply must comply with current IEE Wiring Regulations and
any local regulations, which apply.
9.7 SAFETY CHECK.
After installation or in the event of an electrical fault the electrical
system shall be checked for short circuits, fuse failure, incorrect
polarity of connections, earth continuity and resistance to earth.
10

Installation

The installation must be carried out by competent persons.
On delivery, check to make sure that the packaging has not
been damaged. If there is evidence of damage, contact your
supplier immediately.
Check the 10 digit code number on the appliance carton to
ensure that the correct appliance for the gas supply has been
supplied.
The code number for a natural gas appliance is 7 702 311 028.
The code number for an LPG appliance is 7 702 411 028.
10.1 Appliance Installation
a) Unpack the appliance and take care to remove the
installation kit which is packed on top of the polystyrene
packing
The kit comprises of the following:
- One gas service cock with fibre washer
- One cold water isolating cock complete with fibre washer
- One water discharge pipe complete with brass swivel union
- Four fixing screws and wall plugs.
b) Lay the appliance on its back and pull off the Temperature
control knob. Unscrew the temperature control outer bezel,
slide-up the facia cover and unscrew the two screws to
release the casing from the appliance. Lift up the lower front
edge of the case and slide towards the top of the heater to
unhook the case from the back panel.
c) Offer up the wall mounting bracket to the wall and mark the
positions for the two fixing screws. Drill two holes and fit the
wall plugs and screws.
Hang the appliance on the bracket and secure the appliance
back panel to the wall through one of the two holes located
at the lower left hand side of the panel.
d) Make up the gas supply to the upper connection on the gas
control assembly using the fibre washer provided. Fit the
gas isolation cock as close as possible to the appliance (see
fig. 5, pos. 1).
e) Connect the appliance to the incoming cold water supply
via the fitting which includes the stop valve. A fibre washer
is provided (see fig. 5, pos. 2).
f) Connect the appliance to the domestic water remote draw
off points via the outlet fitting.
g) Turn on the water supply to the appliance. Open the stop
valve on the inlet fitting to the appliance and the open the
hot and cold water taps.
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(24 x 0.20mm) to BS 6500 Table
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