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Multi-functional gas control for use with high performance fan assisted appliances.
A pneumatic device controls the quantity of gas going to the burner proportional to the instantaneous air flow with a
certain ratio. Access to all the adjustment operations is obtained from the top face.
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.
MAIN FEATURES
Two automatic silent-operation shut-off valves:
- EV1 in class B (class A optional)
- EV2 in class D (class C optional).
Servo-system pressure regulator (PR).
Pneumatic device for proportional control of the gas pressure according to the differential air pressure ∆p (air) applied,
at a pre-set ratio.
Zero adjustment device (offset), (Q).
Pilot outlet (plugged on request) with pre-selection of the gas flow (RQ).
Inlet pressure test points (E).
Outlet pressure test point (versions without ratio adjuster), (A).
Pressure test points of pneumatic control signal (G).
Inlet and pilot filter (FL).
1/2 threaded gas inlet and outlet with provision for flanged connection.
Mechanical preselection of minimum (N) and maximum (P) outlet pressure (optional).
Gas side outlet version with prevision for flanged connection.
Air/gas ratio adjuster (S), (optional: only for standard gas outlet).
WORKING DIAGRAM
AIR LINE
GAS
INLET
TECHNICAL DATA
The technical data specified below refer, where possible, to the European Standard EN 126, "Multi-functional controls
for gas-burning appliances".
Torsion and bending resistance
Automatic shut-off valve (EV1)
Automatic shut-off valve (EV2)
Shut-off valves opening and closing times
Pressure regulator
Gas/air pressure ratio ∆p air
Pressure range of air signal
Range of gas outlet pressure
Maximum pressure of pneumatic control signals
Working temperature range
Max. gas inlet pressure
Time constant
Assembly position
6
Gas connections
Gas families applicable
PR
FL
EV1
AG
EV2
P+
P-
MAIN
BURNER
PILOT
BURNER
group 2
class B
class D
≤ 1 s
class B
1:4 to 1:18
0.3...5 mbar
3-30 or 20-50 mbar
10 mbar
0...60°C
60 mbar
≤4 s
any position
Rp 1/2 ISO 7
I, II and III
(class A optional)
(class C optional)
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