15
5. ELECTRIC EQUIPMENT
5.5 List of components with UV-Detector
A1 Gas burner control
A2 Power control
A3 Valve, leak tester,
Dungs VPS504
F1 Operation fuse
F2 Operating fuse
F3 Operating fuse
H1 Operating lamp
H2 Lamp, high capacity
K1 Motor contactor with thermal
overload protector
K2 Auxiliary relay
M1 Burner motor
M2 Damper motor, L&S
SQN75.664.A21B
R1 UV-Detector
S1 Operating switch
S3 Control thermostat
S4 Temperature limiter
S5 Micro switch for hinged door
S7 Main switch
S8 Air pressure switch
S10 Gas pressure switch, max.
S11 Change-over switch, Aut.-man.
S12 Change-over switch,
Increase-Reduce
S15 Control thermostat, 3-pole
(only for 2-stage sliding)
S20 Main switch
T1 Ignition transformer
X1 Connection terminal board
X2 Earth terminal
X3 Plug-in contact, burner
X4 Plug-in contact, boiler
X7 Plug-in contact, 3 phase,
burner
X8 Plug-in contac
}
t, 3 phase,
boiler
X15 Plug-in contact, power
controller, burner
X16 Plug-in contact, power
controller
S9 Gas pressure switch
Y1 Gas solenoid valve 1
Y3 Safety solenoid valve
5.6 Function
1.
Operating switch ON-Thermostat ON-Gas pressure switch ON-
Air damper closed.
A control is made that the air pressure switch does
not
indicate fan
pressure. Then the burner motor starts.
2. Air damper motor opens.
The air damper motor opens the damper to max. position. A control is
made that the air pressure switch indicates sufficient fan pressure.
3. Air damper motor closes.
The air damper motor closes to min. load position. Then the ignition
spark is formed.
4. Main and safety valves open.
The gas is ignited. The ionization electrode indicates a flame.
5. The safety time expires.
The ignition spark goes out. The safety time expires. If there is no
flame or if for some reason the flame disappears after this time limit,
the burner control locks out.
6. Operating position.
The burner is in operating position and can now change over to the
capacity controlled by the regulator.
7. Stop.
The operation of the burner can now be interrupted by means of the
operating switch or the thermostat.
The control locks out.
The red lamp in the control is lit. Restart the burner by pressing the
reset button.
Mains connection and fuse in accordance with local regulations.
