Sit 820 NOV A mV User Manual
820 NOVA mV
MULTIFUNCTIONAL CONTROL FOR GAS
THERMOPILE POWER SUPPLY
THERMOELECTRIC SAFETY DEVICE
SERVO-CONTROLLED PRESSURE REGULATOR
SHUT-OFF SOLENOID VALVE
SIT Group
PIN 63AP7060/2
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MAIN FEATURES
Multifunctional control with
shut-off solenoid valve
powered by a thermopile: an
external power supply is not
required. Fitted with:
thermoelectric safety device,
single control knob (off, pilot,
on), restart interlock against
improper operation, servo-con-
trolled pressure
regulator, and shut-off
solenoid valve with on/off gas
flow control.
Step ignition device on
request.
SINGLE-KNOB
MULTIFUNCTIONAL CONTROL
Thermopile power supply.
Three position (off, pilot, on) control knob.
Thermoelectric flame failure device with restart interlock.
Near-silent automatic shut-off valve.
Servo-controlled pressure regulator.
Step ignition device (optional).
Main gas flow manual adjustment device (on request).
Pilot outlet with gas flow restrictor.
Inlet and pilot filters.
Inlet and outlet pressure test points.
Threaded gas inlet and outlet with provision for flange connection.
Connection for pressure regulator / combustion chamber compensation.
820 NOVA mV is suitable for installation on boilers,
catering equipment, furnaces and radiators where
complete independance from the external electricity
mains supply is required.
Data refer to EN 126
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DESCRIPTION
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1 Control knob
2 Main gas flow manual adjustment
device
3 Adjustment screw for gas flow
to the pilot
4 Thermocouple connector
5 Alternative thermocouple connector
6 Provision for accessories support
bracket
7 Inlet pressure test point
21
4
3
8 Outlet pressure test point
9 Actuating solenoid valve
10 Pilot outlet
11 Main gas outlet
12 Holes (M5) for fixing flanges
13 Supplementary valve body fixing
points
14 Connection for pressure regulator /
combustion chamber compensation
15 Thermopile and thermostat
connection
15
10
11
6
12
7 8
• Gas connections: Rp 1/2 ISO 7 (1/0 3/8” on request)
• Installation position: any position
• Gas families: I, II and III
• Maximum gas
inlet pressure: 60 mbar
• Outlet pressure
setting range: 3...30 mbar (20...50 on request)*
• Working temperature
range: 0...70 °C
• Pressure regulator: Class B
• Automatic solenoid
valve: Class D (Class C on request)
9
TECHNICAL DATA
5
Use two-wire thermopile
Voltage with open circuit > 370 mV
Voltage with closed circuit > 145 mV
Resisistance of the coil 12.2 ohm
14
THERMOPILE POWER SUPPLY
13
*
Versions without manual gas flow adjustment device
Data refer to EN 126
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