Global G20 Installation Manual page 21

I NS T AL L AT I ON M A N U A L
no
2.12 Does appliance switch off
exactly 22 sec after
servomotor starts running?
yes
2.13 Check cross lighting main
burner and 2nd thermocouple
system.
Wiring
- the black and red extension
wire of the 2nd thermocouple is
connected to:
- the 2nd thermocouple (both
wires)
- the receiver (black wire, can be
forgotten during installation)
- earth (red wire)
Flame transfer main burner
- Is flame transfer main burner
OK?
Flame must heat 2nd couple within
approx. 18 sec. (after servomotor
starts to run).
If not, check:
- 2nd couple free from
vermiculite, chips or pebbles
- Placement of wood blocks or
pebbles
- Burner holes (locally) blocked.
Remove (vermiculite) dust
- Vermiculite is missing
- Chips on burner
- Lack of combustion air. See 2.15
- Vermiculite not spread evenly
over burner(s).
Voltage 2nd thermocouple
- Measure the voltage of the 2nd
thermocouple just before the
appliance turns off.
- Measure between black
extension wire and earth.
Voltage <1,8mV Glass window
mounted!
- Flame transfer main burner too
low.
See above. Correct this fault, before
taking further action!!
- Flame suffocates, see 2.15.
Correct, before taking further
action!!
- Burner pressure (too high or too
low)
- 2nd thermocouple defective
(output: 0 mV)
- 2nd thermocouple not correct
position.
Bend into correct position (see
Appendix 3, fig. 43).
- 2nd thermocouple in correct
position.
Bend deeper into flame (on the
condition that flame transfer and
flame picture are in order!! See 2.17)
Voltage >1,8mV
- Receiver defective. Replace.
no
2.14 Does main burner go out
after 'some time'?
yes
2.15 Check
Gas supply
- Supply pressure does not
drop away as main burner (or
other appliance) lights,
causing pilot flame to shorten
- Burner pressure (too high or
too low)
Flames suffocating, lack of air.
Dancing flames on burner.
- Lack of combustion air. Check:
- flue system permissible
- proper flue terminal used
Make should be 'DRU'
- terminal correctly sited on
roof or wall relative to
obstructions.
- integrity of flueing system (no
interruptions, not barred,
cobwebs)
- air inlet guides
- flue restrictor/damper
- throttle rings
PowerVent®
Check if pressure difference set too
high
See manual for specific
requirements.
Pilot burner
- Pilot burner dirty. Weak pilot
flame being drawn away by
flames main burner. Clean
with compressed air.
See 2.04
yes
2.16 Is flame picture OK?
no
2.17 Check
Flames: too low
- Supply pressure does not
drop away as main burner or
other appliances in the
building light, causing flames
to shorten.
- Burner pressure (too low)
- False air: Check soundness
glass window
gasket/soundness of the
connection of the glass panes
of two/three sided appliances
(no slots allowed)
Flames: too high
- Line pressure
- Burner pressure
Flames: no even distribution/out
on part of burner(s)
- Position of logs or pebbles.
- Burner holes (locally) blocked.
Remove vermiculite dust.
- Vermiculite not distributed
evenly across burner(s)
- Adjustment of throttle ring(s)
Remove (vermiculite) dust.
- Vermiculite not distributed
evenly across burner(s)
- Adjustment of throttle ring(s)
Flames: too blue/too yellow or
sooting
- Air inlet guides
- Flue restrictor/damper
- Throttle rings
Flames: suffocating: lack of air
You see dancing flames on burner,
seeking for air. See 2.15
Flame picture 'restless'
Indication of too much draught.
Check:
- adjustment of appliance
damper and air inlet guides)
- vertical flue length allowed
(<12m)
- window glass not mounted
gas tight
PowerVent®? Check:
- Pressure difference set too
high
- Silicon pressure measurement
hoses leaking
Consult PowerVent® installation
manual for more info
yes
2.18 Can fire be switched off?
no
2.19 Replace gas control
(thermo-electric valve does not
shut down quick enough because
of some permanent magnetism)
2.20 Perfect!
You have a well functioning
fire
UK