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2.1.3 Gas connection
The gas supply to this appliance must be installed in
accordance with BS 6891 and IGE/ UP/1,1A and 2.
Fit the 1/2” manual gas shut off valve, supplied with this
unit, immediately before the gas control valve. No heat
or soldered joints must be applied in the vicinity of the
gas control valve, as this could cause damage to the
control. All connections and joints must be tested for gas
soundness.
2.1.4 Draught diverter
The draught diverter, supplied separately in the delivery
crate,
MUST
be fitted to the top of the heater in an
unmodified condition before connecting the flue system.
The sensor of the combustion products discharge safety
device is pre-fitted to the draught diverter so care must be
taken not to damage the capillary and thermostat. With
the sensor facing forward, place the draught diverter over
the flue tube and make sure the three legs engage with
the slots in the top casing.
To complete the installation of the combustion products
discharge safety device, remove the two screws from the
top casing, position the bracket with the pre-assembled
thermostat over the holes and re-apply screws.
Complete the electrical circuit by connecting the two-pin
plug to its appropriate socket on the top casing. If the
safety device operates, the heater will shut down and only
restart when the temperature of the sensor has dropped
sufficiently for the button on the thermostat to be reset.
Important
The combustion products discharge safety device must
never be put out of operation.
Re-entry of flue gases to the building could be harmful
and cause poisoning or death.
2.1.5 Flue system
The water heater must be fitted with a flue system
connected to the draught diverter. The flue pipe must rise
for at least 50 cm. vertically before the inclusion of any
bends. If a horizontal run of flue is required this must be
kept to the minimum length possible and incorporate a
rise of 6 cm. per metre of run.
The flue system
must
be self-supporting and incorporate
a removable section close to the heater to enable the
diverter and flue gas baffle to be removed for cleaning.
The materials used for the flue system must be non-
combustible, mechanically robust and resistant to internal
and external corrosion. Combustible materials in the
vicinity of the heater and flue shall not exceed 65°C
during heater operation. The flue shall not be closer
than 50 mm to any combustible material, except where
it passes through such material with a non-combustible
sleeve when the air gap may not be less than 25 mm.
All flues must terminate in free air space approx.
1,5 metres from any vertical surface of structure i.e.
chimneystacks, roof parapets, etc. If an existing chimney
or flue is to be used this must be swept clean and be
free of debris before an approved liner is installed and
connected to the water heater.
Electrical supply
Frequency
Fuse
230 V AC
50 Hz
5 A
2.1.6 Electrical connection
An accredited electrical installation company must carry
out all electrical connections in accordance with IEE
regulations. The appliance must be connected to the
mains by means of a permanent electrical connection.
A Fused isolator must be fitted between the permanent
connection and the water heater. The cable must have
3 cores of at least 1.0 mm
2
. The connecting terminals
for the electrical supply are indicated by the symbol for
earth, N for neutral and L for live. Always check with a
voltage tester that the live and the neutral have been
connected correctly in the electrical supply. The electrical
supply must comply with the requirements below:
The maximum power consumption is 25 W.
See appendix 1 electrical diagram for more information.
2.2 Commissioning
Filling the water heater
1. Close the drain valve.
2. Open the cold-water stop valve to the water heater
and open all taps where hot water can be drained to
remove air. The water heater is filled as soon as cold
water flows from all taps.
3. Close all hot water taps.
Putting into operation
1. Check to see if the heater is filled with water
by running a little to waste from a hot water tap
connected to the system.
2. Make sure that the ON/OFF switch is in OFF position.
3. Make sure gas supply is fully purged of air and turn on
manual gas valve.
4. Switch the mains isolator to ‘ON’. Make sure that
power is correctly supplied to the unit. Use a voltage
tester to check that the live is to “L” and neutral to “N”.
(Flame detection is phase sensitive).
5. When first starting, the controller can be in the ‘lock
out’ condition: depress the reset button to free the
control. (After manual reset, an extended pre-purge/
waiting time will occur).
6. Switch the ON/OFF switch into ON position. If the pilot
fails to ignite within 25 seconds the controls will go
to lock out and the reset button will need to be reset
(wait 15 seconds before attempting reset). It may be
necessary to repeat the lighting sequence a number
of times if all the air has not been purged from the gas
supply.
7. The main burner pressure must be checked once the
heater has operated for 10 to 20 minutes (see 2.4).
8. Set the temperature regulator to the required setting
(60°C is maximum recommended).
Note
: If, during normal use, the reset button is
pressed, the gas valves will close and the automatic
ignition controller will start a new sequence after the
reset button is released.
Shut down
Note
: The water heater must only be turned off when
hot water will not be required for an extended period (e.g.
holidays); otherwise it must be left on.
To shut down put the ON/OFF switch into OFF position.
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