Settings And Adjustments - SIT Group 820 NOVA Manual De Instrucciones

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mV versions
E
A

SETTINGS AND ADJUSTMENTS

All adjustments must be made on the basis of the specific characteristics of the appliance.
Check inlet and outlet pressure using the pressure test points
points with the provided screws. Recommended torque: 2.5 Nm.
Outlet pressure adjustment
Remove the protective plug (A). Turn the adjustment screw (B) clockwise to increase outlet pressure. After setting, fit
the plug (A) flush.
Overriding the pressure regulator
Replace the plug (A), the adjustment screw (B) and the spring (C) with the accessory (D), code 0.907.037. Torque:
1Nm.
Adjustment of gas flow to the pilot burner
Turn the screw
¬
clockwise to reduce flow.
Overriding the pilot flow adjustment function
¬
Screw the setting screw
in flush and then back off two complete turns. Then seal the setting.
Changing the gas family or group
Check that the appliance is suitable for operation with the gas family or group in question. Following the instructions
given above, adjust the outlet pressure to values given in the appliance's instruction book. With third family gases:
override the pressure regulator and gas flow adjustment to the pilot burner.
IMPORTANT: At the end of all setting and adjustment operations, check gas seals and the efficiency of the
appliance. In particular, it is necessary to check that at the minimum (versions with manual gas flow adjustment) and
at maximum outlet pressure flame lift or light back are impossible. After carrying out all adjustments, fit the provided
seals and/or block the setting screws with paint.
DESCRIPTION OF THE VALVE
¿
Control knob
¡
Adjustment knob (versions with manual
gas flow adjustment)
¬
Pilot gas restrictor
Thermocouple connection
ƒ
Mounting for piezo support
Inlet pressure test point
Outlet pressure test point
«
Automatic shut-off valve
¿
¡ ¬ √
ƒ
E
A
≈ ∆
8
Pilot burner
2
6
8
room thermostat
10 12
and
»
...
˛
¢
£
§
«
TP = millivolt generator
TH = thermostat
TP TH
TP
provided. After testing, carefully seal test
Pilot outlet
Main gas outlet
Holes (M5) for fixing flange
Valve supplementary
fixing point
Alternative thermocouple connection
Magnet unit
Connection to the combustion
chamber
...
˛
£
§
TH
»
¢

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