Sit 440 D3 User manual

440 D3
THERMOELECTRIC SAFETY DEVICE
INTERRUPTION OF MAIN GAS FLOW WHILE PILOT IS ESTABLISHED
PILOT OUTLET WITH FLOW ADJUSTMENT SCREW
SIT Group
PIN 0085AQ0587
MANUAL GAS VALVE

MAIN FEATURES
TECHNICAL DATA
Valve with thermoelectric
safety device and pilot outlet
with flow adjustment screw.
Interruption of main gas flow
while pilot is established.
MANUAL VALVE
Thermoelectric safety device.
Pilot outlet with flow adjustment screw.
M18x1 threading below the button (on request).
Thermocouple connection M9x1.
Coaxial gas outlet and inlet with Rp 1/2 connections or, on request, Rp 3/4.
440 D3 is suitable for use with heaters, ovens,
barbecues and all gas appliances
which require a flame failure device.
• Gas connections Rp 1/2 ISO 7 (3/4 on request)
• Installation position any position
• Gas families I, II and III
• Maximum gas inlet pressure 50 mbar
• Ambient temperature 0-80°C
Data refer to EN 125

FLOW RATE AS A FUNCTION OF PRESSURE DROP
Ignition
Depress the button fully, and light the pilot flame
while keeping the button fully depressed for a
few seconds at the same time (see figure).
Igniting the main burner
After releasing the button, the main burner
will ignite. If the burner does not stay on, wait
about one minute and repeat the operation.
Turning off
Close the gas cock to turn off the main and pilot
burners.
OPERATION
INSTALLATION, SETTINGS AND ADJUSTMENTS
Main gas connection
The connection should be made using gas pipes
with Rp 1/2 ISO 7 threading or Rp 3/4 (on reque-
st). Torque: 25 Nm.
Connection to the pilot burner
Piping with 6 mm or 1/4” diameter can be used.
Use a nut and olive connection of suitable
dimensions. Tighten the fitting to torque 7 Nm.
Adjustment of gas flow to the pilot
Screw in the screw (2) to reduce the flow; screw
the screw out to increase.
For installation, adjustment and use, follow the instructions in the
Use and Maintenance Manual Code 9.956.440
2
Adjustment of gas flow to the pilot
1/2”
I Famiglia (d = 0.45) Q = 10.7 m3/h ∆p = 5 mbar
II Famiglia (d = 0.6) Q = 10.0 m3/h ∆p = 5 mbar
III Famiglia (d = 1.7) Q = 5.8 kg/h ∆p = 5 mbar
3/4”
I Famiglia (d = 0.45) Q = 13.1 m3/h ∆p = 5 mbar
II Famiglia (d = 0.6) Q = 12.2 m3/h ∆p = 5 mbar
III Famiglia (d = 1.7) Q = 7.1 kg/h ∆p = 5 mbar

SIT La Precisa
Viale dell'Industria 31/33 35129 PADOVA - ITALY
Tel. [phone] - Fax [phone] - Telex 430130 SITEC I
9.955.771 - R00 GRAPHIC DESIGN BY START - PD - ITALY
DIMENSIONS
15
52,5
103,5
51
38,5 77
45
DESCRIPTION
3Pilot outlet
4 Thermocouple connection
5 Gas inlet
6 Gas outlet
1 Button connected to the thermo-
electric safety device
2 Adjustment screw for gas flow to
the pilot
1
2
3
4
56