EN2R-9004 0606R20-NE
2
DESCRIPTION
Valves
The
C
ombined
V
alve and
I
gnition (
CVI
) system controls and
performs all the functions required for safe ignition, flame
supervision and for safely regulating the gas flow to the pilot
and/or main burner.
The
CVI
consists of a gas valve of the VK41../VK81.. series
and a dedicated ignition control of the series S4565/S4575/
S4585 which is connected directly on to it.
The gas control comprises a standard body to which a range
of features can be factory included to give various functional
options. These functional options include: servo pressure
regulation, throttle valve regulation, fully adjustable
SOFTLITE
,
gas/air control 1:1 or amplified, electrical high-low or
modulating control to fulfil the complete range of control
applications.
The gas control has a first direct on/off operator for opening
the safety valve of class B according to EN 161 and a second
electric on/off servo operator for control of the main valve of
class B,C or J according to EN 161 (for explanation class J,
see chapter Standards and approvals page 30).
The pressure regulator is in accordance with class B
requirements of EN 88
The gas control can handle the three gas families,
manufactured gas, natural gas and LP gas.
General
All measurements are carried out under standard conditions
listed below unless otherwise is indicated.
Standard conditions
•
P
inlet
25 mbar nominal pressure, dry air of 20°C
•
P
ambient
1013 mbar
•
T
ambient
20°C
•
Outlet orifice 2.8 mm
•
Flow indication in m
3
/
h
•
Recording of outlet pressure with a transducer connected
to a
1
/
2
” pipe with a length of 10 times the diameter of the
pipe with a short hose at a length of 5 times the diameter of
the pipe.
•
Nominal voltage
•
Upright position, i.e. the position when the operators are on
top.
