Advertisement
Legend
a
End switch for air damper's OPEN position
AL
Remote lockout indicator (alarm)
AR
Main relay with «ar...» contacts
AS
Unit fuse
B
Wire link (on the burner control's base)
Note!
In applications involving air heaters (WLE), or in the case of oil burners with a maximum
throughput of > 30 kW/h, removing wire link B is not permitted.
bl
Blue
br
Brown
BR
Lockout relay with «br...» contacts
BV...
Fuel valve
EK...
Lockout reset button
FR
Flame relay with «fr...» contacts
H
Mains isolator
L...
Lockout warning lamp
LK
Air damper
LP
Air pressure switch
LR
Load controller
m
Auxiliary switch for air damper's MIN position
M
Fan or burner motor
NTC
Resistor with negative temperature coefficient
QRC1
Blue-flame detector
QRB
Photoresistive detector
R
Control thermostat or pressurestat
RAR
Silicon photocell detector
SA
Air damper actuator
SB
Safety limit thermostat
Si
External primary fuse
SM
Synchronous motor of sequence switch
sw
Black
v
In the actuator: Auxiliary changeover switch for position-dependent release of fuel
V
Flame signal amplifier
W
Limit thermostat or pressure switch
z
In the actuator: End switch for air damper's CLOSED position
Z
Ignition transformer
A
Startup
B
Operating position
C
Controlled shutdown
D
End of control sequence
Control signals delivered by the burner control
Permissible input signals
Required input signals:
If these signals are not present at the points in time marked by symbols or during the shaded periods of
time, the burner control will interrupt the startup sequence or initiate lockout
22/24
Building Technologies Division
CC1N7153en
21.09.2016
Advertisement
