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Honeywell VR 4605 NA 4003 valve
with V7335A4014 Modureg
Gas pressure Adjustment
1 - With the burner lit:
2 - Connect suitable pressure gauge to burner test point "B", and then:
3 - Disconnect air pressure compensation tube "H";
4 - Disconnect the wires from coil "C" of the Modureg;
5 - Remove protective cover "D";
6 - Remove coil "C" by opening the coupling spring "I";
7 - Screw the minimum adjustment screw "E" up tightly. (clockwise)
8 - Unscrew lock nut "F" on sleeve "G";
9 - Adjust maximum pressure by rotating sleeve "G" clockwise to in-
crease pressure and anticlockwise to reduce pressure;
10 - Tighten sleeve lock but "F" then check that the pressure is still at the
required value;
11 - Adjust minimum pressure by rotating screw "E" anticlockwise
until the required value is reached;
12 - Fit coil "C" by sliding it into the sleeve, pushing
and rotating it lightly until the coupling spring "I"
clicks into place;
13 - Shut down and ignite the burner, checking that
the minimum pressure value is stable;
14 - Reconnect the wires to coil "C" of the Modureg;
15 - Reconnect air pressure compensation tube "H";
16 - Replace protective cover "D";
17 - Turn burner off, remove pressure gauge, close
and test, test point;
Key
A - Test point inlet pressure
B - Burner test point
C - Coil
D - Protective cover
E - Minimum adjustment screw
F - Lock nut
G - Sleeve
H - Pressure compensation tube
I - Coupling spring
L - Adapter (for only LPG version)
D
C
E
G
F
H
A
B
I
L