SUN M50 - M70
A
SB/R
W/GP
AL
LK
M
Z
SA
BV1
(LR) BV2
LP
FS
EK2
Key
A
Start-up
C
Burner operation position
D
Adjustment stop with command from R
• the burner is immediately turned off
• the flame control device prepares for a new
start
I
Cam 1
AL
Fault signal (alarm)
BV... Fuel valve
EK2 Remote reset
FS
Flame presence signal
GP
Gas pressure switch
LP
Air pressure switch
LR
burner power regulator
LK
air shutter
B-B' Flame stabilisation interval
C-D
Burner operation
M
Fan motor
GB
I
t10
tw
t3
t1
t12
t11
Cod. 35447686 - 04/2008 (Rev. 00)
B
B'
C
t3n
t4
TSA
fig. 11
R
Thermostat or pressure switch
SA
Servomotor
SB
Safety thermostat
TSA Ignition safety time
W
Control pressure switch or thermostat
Z
Ignition transformer
tw
Standby time
t1
Pre-ventilation time
t3
Pre-ignition time
t3n
Ignition time during (TSA)
t4
Interval between (End TSA-BV2) or (BV1-LR)
t10
Delay for air pressure switch consent
t11
Air shutter servo control opening time (SA)
t12
Air shutter servo control closing time (SA)
D
12
10
3
7
9
4
5
11
6
1
8
47