INSTRUCTION SHEET
VR4920Z 1000 AND 45.900.449-
DUAL VALVE ASSEMBLY APPLICABLE FOR BUILT--ON PURPOSES
EN1R--9181 0104R1--NE
DESCRIPTON
The VR4920Z 1000 dual valve has been specially developed
to have kits fit--on.
When a kit with a V7335A electric modulating regulator
(Modureg) is fitted on the dual valve assembly the type gas
control is equal to a VR4920M.
When a kit with a V4336A electric high low regulator is fitted
on the dual valve assembly the gas control is equal to a
VR4920P.
APPLICATION
The VR4920M provides the following functions:
Servo pressure regulation
Outlet pressure is held at a constant value regardless of
fluctuations of inlet pressure.
Modulating control
Between minimum and maximum outlet pressure gas
supply to the appliance is dependent on the electrical
signal to modulating coil.
Mechanical limitation of outlet pressure
The minimum and maximum burner pressures are
mechanically adjusted to guarantee good burner
performance in case the modulating control should
become out of range.
The VR4920M is designed to work together with the W9335
modulating Modureg control, W4115 logic control, T7335A
thermistor temperature sensor and an advanced range of
micro computer based modulating controls.
The VR4920P provides the following functions:
Servo pressure regulation
Outlet pressure is held at a constant value regardless of
fluctuations of inlet pressure.
High--Low control
Within the ranges specified a high and a low outlet
pressure can be mechanically adjusted and electrically
selected.
High outlet pressure to appliance will be established by
switching control voltage to High--Low coil on.
By switching voltage off, outlet pressure will drop to low
pressure setting.
1 Place gasket
note: orientation !!!
2 Fix operator with the four
screws provided
4 Fit Modureg or High--Low
regulator with the indent
beside the locating plug and
fix with the two screws
provided.
3 Place seal
5 Make soudness testing
6 Adjust Modureg or
High--Low setting
Fig. 1.
Subject
to
change
w
ithout
notice.
Printed
in
the
N
etherlands.