Commissioning; Adjust Servo Regulator - Honeywell V4730C Operating Instructions Manual

6 CoMMIssIonInG

The V4730C/V8730C/V4734C are normally closed
valves. The valves open when energized and close
when power is removed.
WARnInG
Explosion and Electrical Shock Hazard. Can cause
severe injury, death or property damage.
Please observe the following:
– Do not put the system into service until you
have satisfactorily completed the Valve Leak
Test, all applicable tests described in the
instructions for the flame safe- guard control,
and any other tests required by the burner
manufacturer.
– All tests must be performed by a trained,
experienced, flame safeguard technician.
– Close all manual fuel shutoff valves immediately
if trouble occurs.
– After the installation is complete, cycle the valve
several times with the manual fuel shutoff valve
cock closed. Make sure the valve functions
properly.
– Also, perform the Valve Leak Test before putting
the valve into service.
6.1 Adjust valve
➔ The procedures described in this chapter are
related to the adjustments on the main gas valve.
➔ For adjustments on the other additional function-
alities (e.g. pressure switch), refer to the included
instruction sheet of the product in question in the
package.
WARnInG
Incorrect installation
Please observe the following to ensure that the
unit is not damaged during adjustment and
operation:
– Adjustments must be made by qualified
personel only.
– To ensure a safe closing of the valves, it is
essential that voltage over the terminals of
operators is reduced to 0 Volts.
2nd valve = fast opening
Flow rate can be adjusted.
2nd valve = slow opening
The following characteristics can be adjusted.
– Flow rate
– Step pressure
– Opening speed
Important
➔ To ensure a satisfactory setting of the valve the
pressure drop over the valve should be at least
10% of the supply pressure or 2,5 mbar which
ever is the greatest.
6.2 Adjust valve
➔ The procedures described in this chapter are
related to the adjustments on the main gas valve.
➔ For adjustments on the other additional function-
alities (e.g. pressure switch), refer to the included
instruction sheet of the product in question in the
package.
WARnInG
Incorrect installation
Please observe the following to ensure that the
unit is not damaged during adjustment and
operation:
– Adjustments must be made by qualified
personel only.
– To ensure a safe closing of the valves, it is
essential that voltage over the terminals of
operators is reduced to 0 Volts.
2nd valve = fast opening
Flow rate can be adjusted.
Important
➔ To ensure a satisfactory setting of the valve the
pressure drop over the valve should be at least
10% of the supply pressure or 2,5 mbar which
ever is the greatest.
6.3 Adjust flow rate
2nd valve = fast opening
1
3 Turn adjustment screw counter-clockwise to
increase or clockwise to decrease the flow rate.
4 Replace cap on top of the coil.

7 ADJUst seRVo ReGULAtoR

WARnInG
Incorrect adjustment
Please observe the following to ensure that the
unit is not damaged during adjustment and
operation:
– If the appliance manufacturer supplies checkout
and/ or service and maintenance instructions
carefully follow them. If these instructions are
not provided, follow the procedure described
below.
➔ In some applications, adjustment screws are
sealed as well, to avoid drift of factory calibration
during transportation. These sealings can be
broken when needed for readjustments, but only
by trained and authorized technicians.
EN-7
2