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The d1scharge pipe from the tund1sh must be continued in 22
mm copper p1pe, and laid to a continuous fall to avoid the
retention of any discharge water within the pipework. A fall in
excess of 1 in 200 will be satisfactory.
The pipework should have a resistance to flow of water not
greater than that of a straight pipe 9 metres long.
The termination of the discharge pipe must be visible, but in a
localion not readily accessible to persons.
Discharges at low level are acceptable provicUng that a wire
cage or similar is positioned to prevent contact, while
maintaining visibility.
9.
Move the appliance mto its correct position with the rear of the
appliance base plate parallel with the wall or skirtmg board.
10. Connect the gas pipe to the gas inlet on the appliance at the
left hand side. The connection must be close to the side of the
appliance
14. COMMISSIONING THE
APPLIANCE
After the appliance has been finally connected and the heating
system nushed out (See Section 1. Paragraph 4-Installation
Warnmg), check that the electricity supply is off, the gas service
cock is o!f. the appliance thermostat control knobs are turned to
maximum and the system controls are calling for heat
1.
Open all radiators and lockshield valves and
fill
the system
Vent as necessary. See Section
9,
Paragraph
4.
Check for water
soundness
2.
Sw1tch the electrical supply on at the mains socket.
NOTE: Immediately mains electncity is applied to the boiler
the pump delay timer is energised causmg the central heating
pump to run for about 5 minutes. This occurs whether or not
the controls are calling _for heat. The pump will subsequently
only run m the course of the normal operation of the boiler
3.
Position the Operatmg Switch to HEATING
&
WATER If a
programmer is fitted, switch to the ON programme. Leave
the system to work
1n
a
cold stdlc for about 20 minutes,
venting dS necessury. Position the Operatmg Switch or
programmer to OFF
4.
Turn the gas on at the gas service cock
5.
Push hard on the grey gas valve button and keep it pressed m
At the 'iame time, separately push in the red 1gniter button.
When 1t clicks. the pilot (seen through the observation window}
should light. If the pilot does not light immediately, press the
1gniter button repeatedly until1t does. When the pilot lights,
contmue to hold the gas valve button in for a further 15
seconds. then release it slowly
NOTE. If the pilot does not stay ul1ght.. twist the gas valve
button m the direction of the arrow. Wait for three minutes and
repeat operation 5 until the pilot IS lit. Continue to hold the gas
valve button in for a longer period, then release it slowly. Check
the pilot flame length is as mdicated in Fig. 19. If 1t is not, then
adjust the pilot throttle. clockw1se to reduce the size or anti-
clockWISP to increase the s1ze of t.he pilot flame. See Fig. 13
NOTE:l he m1mmum recommended thermocouple output is
SmV closed c1rcuit
6.
Loosen the burner pressure test point screw one turn and
connect
a
pressure gauge See F1g. 13.
7.
Position the Operating Switch to HEATING
&
WATER or, if a
programmer is fitted, switch to ON programme. Check the
main burner 1gnites smoothly.
8.
lest for gas soundness around the boiler gas components
us1ng leak detect1on fluid. Refer to Section 16, Paragraph 7c
for details of the method of checking the burner manifold
joint for gas soundness_
lUrn off the boiler and replace the boiler inner casing cover
immediately after checking the gas soundness. Check the main
burner through the observation window.
14
11. Check the gas pipework up to the appliance gas service cock
for
gas soundness in accordance with BS6891.
1 2. Connect the water system pipes at the rear of the appliance.
13. Thoroughly flush the whole of the water system with cold
water. Fill the system, vent the boiler and check for water
soundness.
14.
Connect the first section of the flue to the socket on top of the
boiler. See Section
5 -
Flue. Properly seal the flue pipe into the
socket. Complete the installation of the flue. DO NOT OPERATE
THE APPLIANCE WITHOUT THE FLUE FULLY CONNECTED.
15. Connect the mains lead as described in Section 11 - Electrical.
For frost and room thermostat connections refer also to
Section 11.
1 6. Reassemble the appliance leaving off the cabinet front panel
until the commissioning has taken place. See Section 14. Push
the wiring back into the locating clip on the left-hand side
panel.
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TO
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Check the burner setting pressures. See Section 2- Technical
Data
ADJUSTING DHW (HIGH) GAS PRESSURE
Refer to Fig. 1 3
(a)
Allow the boiler to fire for at least 10 minutes before making
any adjustments.
(b)
Turn the DHW thermostat to maximum. Turn the HEATING
thermostat OFF
(c)
If DHW service gas pressure needs adjustment refer to
TECHNICAL DATA. Using a 10mm bladE width screwdriver, turn
the screw 'A' clockwise to increase and counter-clockwise to
decrease pressure until the des1red setting is achieved.
(d)
Check several times if main burner ignites smoothly, by
operating the OHW thermostat, before proceedmg to check the
HEATING (LOW) gas pressure.
ADJUSTMENT OF HEATING (LOW) GAS PRESSURE Refer to Fig.13
(e)
Turn the DHW thermostat to OFF. Set the HEATING thermostat
to maximum
(f)
If the HEATING gas pressure
requm:~s
adjustment refer to
TECHNICAL DATA
(g)
Using a small screwdriver turn the screw 'B' clockwise to
increase and counter-clockwise to decrease pressure until the
desired settmg IS achieved
(h)
Operate the HEATING thermostat several times to ensure the
main burner ignites smoothly before checking that gas valve
switches from HIGH to LOW correctly.
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