Optima Company 1001 User Manual

Page 22

1001

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)