EN2R--9018 9704R1--NE
6
PERFORMANCE CHARACTERISTICS
Opening time
The first valve (V1) opens in less than 1 second.
The second valve (V2), by--pass valve (Vb) and pilot valve
(Vp) can be either a fast opening valve which opens in less
than 1 second or a characterized opening valve which is
adjustable from 1 up to 30 seconds, at rated capacity.
The opening characteristic is factory set at approximately 6
seconds at the following conditions:
− measured at 80 % of rated capacity
− 30 mbar supply pressure
− nominal voltage
− 20
E
C
− 2,5 mbar pressure drop
− no step pressure
Due to the influence of ambient temperature (--15 ... 60
E
C)
the adjusted opening time of 6 seconds measured at 80% of
adjusted flow rate can vary
+
/
--
4 seconds.
Closing time (V1, V2 , Vb and Vp)
Less than 1 second for all four valves.
Maximum working frequency
1 cycle per minute
Duty cycle
Coil suitable for permanent energization
Operational voltage range
The combination gas valve will function satisfactory between
85% and 110% of the rated voltage.
Design life
Model
Number of Cycles
VQ420AA 600,000
VQ425AA 600,000
VQ440AA 300,000
VQ450AA 300,000
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