IDEAL Classic LX RS 230, Инструкция по установке и обслуживанию

Страница: 26 / 32

26
Classic LX, RS -
Installation
NO
NO
NO
Is there a spark at the ignition electrode ?
Is there gas at the pilot burner when the gas valve
button is pressed ?
Light the pilot burner with a match.
Confirm satisfactory ignition, using the piezo unit
51 PILOT WILL NOT LIGHT
Check thermocouple output (8-15 mV closed circuit).
Replace thermocouple if output is outside the stated
range. Does the pilot now stay alight ?
Is the connection between the thermocouple and
the gas valve clean and tight ?
YES
Check the pilot injector. Refer to Frame 39 Is the pilot flame the correct size (refer to Frame 35) ?
NO
Allow time to purge any air present.
Check the following; the gas valve button is being
pressed fully in; there is gas pressure at the boiler
inlet; the boiler union gas cock is open; the pilot jet
is not blocked
Check the gap between the electrode and the pilot
burner; 3-4 mm. Refer to Frame 35.
Check the H/T lead and electrode are undamaged and
the connections are NOT close to earthed metalwork.
Check the piezo unit is operative - by holding an earthed
screwdriver approximately 3 mm from the H/T output
terminal (with the ignition lead removed) and by operating
the button.
Is there a spark across the gap ?
52 PILOT WILL NOT STAY LIT WHEN THE GAS VALVE BUTTON IS RELEASED
Does the overheat thermostat (if fitted) require resetting ?
Does the pilot now stay alight ?
YES
NO
Clean the contacts and reconnect securely
Replace the overheat thermostat
NO
NO
Replace the gas valve
NO
Have you confirmed that the system controls
are 'Calling for Heat' ?
Note. After any faults have been corrected, return all thermostatic and other controls to the previously noted settings
NO
Check the boiler thermostat
Does the main burner light ?
Is there a supply voltage between the gas valve
terminals ? Expect 230 V +10% -6%
YES
YES
NO
Check the settings of the room thermostat and the
cylinder thermostat. Check the control system
Set any CH and HW controls to the 'Continuous'
position. Is there a supply voltage between CH and N,
also between HW and N? Expect 230 V +10% -6%
YES
If there is no supply, check controls
Is there a supply voltage at the input to the control box?
Detailed instructions on the cleaning and adjustment or
replacement of faulty components are contained in the
'Servicing' section of this publication.
FAULT FINDING
YES
YES
YES
NO
YES
NO
YES
NO
NO
YES
Before attempting any electrical fault finding ALWAYS carry
out preliminary electrical system checks, i.e. earth continuity,
polarity and resistance to earth using a suitable meter.
F
AUL
T FINDING
Faulty piezo unit - replace
Faulty gas valve - replace
53 PILOT LIT BUT NO MAINS GAS
Check the supply voltage, e.g., by using a multimeter,
set on the 300V AC range, between the L and N
terminals. Expect 230V +10% -6%. If there is no
supply check the fuse in the plug or other supply point