Circo G20, Installation Manual

Page: 21 / 36

English
I NS TAL LAT ION M ANUA L
2.12 Does appliance switch off
exactly 22 sec after
servomotor starts running?
2.19 Replace gas control
(thermo-electric valve does not
shut down quick enough because
of some permanent magnetism)
2.14 Does main burner go out
after 'some time'?
2.18 Can fire be switched off?
2.20 Perfect!
You have a well functioning
fire
2.16 Is flame picture OK?
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.
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
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
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