Unigas S10, Installation Operation & Maintenance, Page: 24 / 32

APPENDIX: COMPONENTS CHARACTERISTICS 24
Command program in the event of a defect
In the event of a defect the inflow of fuel is interrupted. When the
block occurs in the preventilation time (not indicated by the symbol)
the causes may be the air pressostat LP or a premature signal of
flame presence.
With voltage failure: repetition of the start-up with complete pro-
gramme
Premature presence of flame at the start of preventilation time:
safety stop (block)
Contact of air pressostat LP stuck during time tw: start-up cannot
take place.
Air pressure failure after t10: safety stop after safety time t2
Absence of confirmation of air pressure: safety stop(block) after
t10
Failure to start up the burner: safety stop after safety time t2
Absence of flame during functioning: immediate safety stop.
Checking the ignition spark with QRE: with absence of spark there
is no consent to the fuel, safety stop (block) after time t2.
Unblocking the appliance
Unblocking of the appliance can be effected immediately after the
safety stop without causing modification of the programme.
Indicator of the command programme of the defective item
On the front part of the safety appliance is located a plexiglass lunette
under which there is the indicator disc of programme's progress.
In the event of safety stop, the programmer stops. The disc shows, as
follows, the position of the programme at which the interruption occur-
red:
no start-up, the command ring is open
interval tw or t10 on LGB21; tw or t11 on LGB22
air damper open (LGB22)
safety stop (block) through absence of the air pressure
signal (LGB21) or because (LGB22) the air damper is not
open
interval t1, t3 (t12)
fuel consent (LGB22)
safety stop (block) through absence of the flame signal at
the end of the 1st safety time
consent of the 2nd fuel valve (LGB 21) or consent at the
power regulator (LGB22)
functioning of the burner at partial or maximum power (or
return to the service position)
Specifications
Supply voltage 220 V AC -15%...240 VAC +10%
Frequency 50 Hz -6%...60 Hz +6%
Consumption 3 VA
Flow rate of the contacts at terminals
- terminal 3
max. 3 A (15 A max. for 0.5s)
- terminals 4, 5, 7 max. 2 A
- terminal 10 max. 1 A
- terminal 12 (for Umax 264 V) max.5 A
Fuse max.
10 A, with slow blow-out
Radio disturbance N - VDE0875
Current at input to terminal 12 max 5 A 1
Protection
IP40
Permissible ambient temperature
- operating
-20....+ 60°C
- transport and storage -40....+ 70°C
Mounting pos. permitted any
Mass (weight) without/with basec. 230/310 g
Mass (weight) AGK66
c. 12 kg
1) At permissible voltage and that is 187...264 V
P
1
2
°°°°