Key
A
limit contact switch for damper OPEN position
AI
block remote signal
AR
main relay (working network) with contacts "ar"
AS
Monitor fuse
BR
block relay with "br" contacts
BV
fuel valve
EK
reset button
FE
detector electrode of ionisation circuit
FR
flame relay with "fr" contacts
G
ventilator motor or burner motor
GP
gas pressure switch
H
main interruptor switch
L
block stoppage LED
LK
air damper
LP
air pressostat
LR
safety regulator
M
auxiliary contact switch for damper "MIN" position
QRA UV detector
QRE ignition spark detector
R
thermostat or pressostat
S
fuse
SA
damper servo-motor
SM
synchronous programmer motor
V
flame signal amplifier
V
in case of servo-motor: auxiliary contact for response to fuel
valve with regard of damper position
W
safety pressostat or thermostat
Z
ignition transformer
Z
in case of servomotor: end of limit contact switch for damper
CLOSED position
ZBV pilot burner fuel valve
°
for mono-tube burners
°°
for twin-tube burners
(1)
input for raising QRA detector voltage to test level
(2)
input for excitation of flame relay during flame detector test
circuit (contact XIV) and during safety time (contact IV)
(3)
Do not press EK for more than 10 seconds
Programmer diagram
t1
pre-ventilation time
t2
safety time
*t2
'1st safety time
t3
pre-ignition time
*t3
'pre-ignition time
t4
interval for creating current between terminals 18 and 19
*t4
'interval for creating current between terminals 17 and 19
t5
interval for creating current between terminals 19 and 20
t6
post-ventilation time
t7
interval between startup consent and current created at
terminal 7
t8
duration of start-up
*t9
2nd safety time
t10
interval before air pressure monitoring begins
t11
damper opening travel time
t12
damper closure travel time
t13
permissible post-combustion time
t16
initial delay of damper OPEN response
t20
interval before programmer automatically stops
* These times are valid with the use of a series 01 safety device for moni-
toring burners with intermittent pilot lighter.
