pag.12
B
LB 472
Blu 1700.1÷2000.1 P AB
Remove cover to gain access to the adjusting cams.The cams are to be adjusted
through the suitable key provided for. Description:
I
-
Limit switch for air damper “High Flame” position adjustment
(Max. power)
II
-
Limit switch for the air damper position at burner’s shut down
III -
Limit switch for air damper “Low Flame” position adjustment
(Min. power)
V
-
Limit switch for 2nd stage’s solenoid valve opening release
NOTE :
Cam V (to allow the 2nd stage’s solenoid valve opening) must be adjusted to an
intermediate position between the Low and High Flame ones (to an angle
approximately 5° greater than the low flame position).
LANDIS & STAEFA SQN 30 151A2700 AIR DAMPER MOTOR
MANUAL RELEASE
SWITCH
”PAB” VERSION GAS BURNERS GAS TRAIN INSTALLATION AND SETTING INSTRUCTIONS
Fix the gas train to burner body by means of the screws of the flange, pay attention to set correctly the gasket. Connect
electrically the gas train with the 6 pole plug.
Switch on the burner (it has already been tested in the factory, so it is pre set on average values) and verify the tightness
of gas train connections made during installation. Act as follows to adapt the burner output to the boiler.
High flame
1. Bring the burner in high flame , air inlet must be set at 75 ° (maximum opening position).
To adjust air capacity operate on the combustion head position. Just in peculiar case it is necessary to reduce the air
flow in high flame closing air intake damper.
2. The position of gas butterfly valve must be lower then 90° ( typically 85°. It is important not get over 90° to obtain
a perfect combustion during passage from high to low flame). Eventually adjust this position by shaft B after
loosening the screw A.
3. Regulate gas capacity in high flame through the gas governor, or operate on the adjustable gas valve.
Attention: the instructions for gas valves setting are included in the gas train manual.
Error diagnosis
Error message
Flash-Code
Possible fault
lockout
❘ ❙ ❙ ❙ ❙
within lock out safety time
safety time
no flame establishment
air proving switch
❘ ❙ ❘ ❘ ❘
air proving switch
in closed position
contact welded
air proving switch
❘ ❘ ❘ ❙ ❙
air proving switch does not
time-out
close within specified time
air proving switch
❘ ❘ ❘ ❘ ❙
air proving switch opens
opened
during start or operation
loss of flame
❙ ❙ ❙ ❙ ❘
loss of flame during operation
Flash-Code for manual lock out
manual/external
❘ ❘ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙
lock out
