Technical Specifications; Technical Data; Electrical Data - Sit 837 TANDEM Manual Del Usuario

Multi-functional valve with double safety solenoid and a modulating proportionator for automatic outlet pressure
adjustment. The valve is designed for use in appliances with automatic ignition and flame detection systems, with or
without intermittent pilot.
All the adjustments can be made from the top face and the valve is suitable for all three gas families.
The designed lifetime* of this product is 500 000 cycles or 10 years (based on date code) according to the standard EN
126 and the table on designed lifetime as stated in the Afecor document, see http://www.afecor.org/news.html.
This lifetime is based on the use of the control in accordance with the appliance manufacturer's instructions.
Regular inspection of the control by authorized personnel in accordance with guidelines of the appliance manufacturer is required.
After reaching the designed lifetime the product has to be replaced by authorized personnel.
*
The warranty as opposed to the designed lifetime is described in the delivery terms.

TECHNICAL SPECIFICATIONS

Dual safety valve Class B (class A upon request), silent operation (EV1 e EV2).
Servo system pressure regulator (RP).
Gas flow modulating device with mechanical adjuster for minimum and maximum outlet pressure (MD).
Pilot outlet (optional) with flow restrictor (RQ).
Inlet and outlet pressure test points.
Inlet and pilot filter (FL).
Connection port for burner pressure compensation.
WORKING DIAGRAM
GAS
INLET

TECHNICAL DATA

The technical data specified below refers to the European standard, EN 126 "Multi-functional controls for gas-burning appliances".
Group
Automatic valves (EV)
Pressure regulator (RP)
Outlet pressure setting range
Temperature in use environment
max gas inlet pressure
Opening and closing time of automatic shut-off valves
Assembly position
Gas connections

ELECTRICAL DATA

AUTOMATIC SHUT-OFF VALVES
Voltage
(AC)
240 V 50 Hz
220 V 50 Hz
220 V 60 Hz
24 V 50 Hz
24 V 60 Hz
Electric protection rating using connector
type 150 and gasket and screw code 0.960.108
MODULATING DEVICE
Voltage
(DC)
240 V max
28 V max
16 V max
4
Degree of electrical protection using type 350
connectors with screw seal
RP
FL EV1
FL
Class A
90
100
900
MD EV2
MAIN BURNER
PILOT BURNER
RQ
2
class B
(class A upon request)
class C
2-20 mbar
(white setting screw)
3-37 mbar
(red setting screw)
7-50 mbar
(black setting screw)
0 - 60°C
(on request -20°...+60°C)
60 mbar
≤ 1 s
any position
Rp 1/2 ISO 7
Consumption
(mA) (2 valves)
Class B Low Power
90
70
90
850
900
IP 54
Consumption
(mA)
25 max
165 max
310 max
IP 54
500
600