Johnson Controls GH-5000 Manual page 10

130 4280 010 E
Adjustments
WARNING: All repairs, adjustments and servicing must be made in conjunction with the gas
appliance and in accordance with the appliance manufacturer's instructions. Only authorized
personnel should make adjustments in accordance with the regulations in force.
WARNING: Explosion hazard. The minimum flow rate of the valve must not be adjusted below the
minimum safe working rate of the appliance.
The GH-5000 valve can be adjusted through the use of three adjustable switches located inside the terminal
box of the actuator. The screws of these switches adjust the stroke, which affect the flow rate, depending on
the version of the actuator. (See Figure 2). Loosen the four screws of the terminal box cover and remove it to
access the adjustable switches.
MR
R
Figure 2: Switches
Do not adjust the switches S and R below 3 mm stroke to obtain safe working of the appliance.
Do not make any adjustments on the sealed grub screw (M)!
Do not make any adjustments on the sealed screw (MR)!
Switch M
The valve is factory set to full flow. To adjust the maximum flow rate, turn the 'M' (Maximum Flow) screw.
Turn the screw clockwise to reduce and counterclockwise to increase the flow rate.
Switch S
For CPI versions the 'S' screw head is factory set and sealed.
If new adjustment is required, first make sure that the actuator is mounted on the valve and switched off.
Connect a suitable test circuit between terminals 8 and 9:
•
Terminal contacts 8 and 9 opened: turn the adjustment screw clockwise until the contacts just are
closed. Now turn the adjustment screw one full turn counterclockwise.
•
Terminal contacts 8 and 9 closed: turn the adjustment screw counterclockwise until the contacts are
opened. Turn the adjustment screw clockwise until the contacts just are closed. Now turn the adjustment
screw one full turn counterclockwise.
Energise the actuator and cycle on/off. The terminal contacts 8 and 9 have to be opened in the off position of
the actuator. Otherwise repeat the adjustments and cycle on/off. Finally seal the screw head and remove the
test circuit.
Johnson Controls SA/NV - Leuvensesteenweg 248D - B-1800 Vilvoorde - +32(2) 709 40 00 - www.johnsoncontrols.be
Page:10
S M
M Maximum Flow
Factory set: full flow
Do not make any adjustments on the
sealed grub screw!
S Feed back position / CPI
Factory set is approx. 0.5 mm
OR
Ignition Stage
Factory set is approx. 3 mm
R Reduced Stage
Factory set is approx. 3 mm
or 5.5 mm at models with ignition stage
MR Manual Restart
(switch is not illustrated)
Factory set is approx. 3 sec. running time
Do not make any adjustments on the
sealed screw!