BASO VLV49A Series - Manual (Page 11)

VLV49A Series Universal Replacement Gas Valve Technical Bulletin 11
IMPORTANT: All adjustments must be made in conjunction with
the gas appliance and in accordance with the
appliance manufacturer’s instruction. Only
authorized personnel should make adjustments.
!
WARNING: Explosion Hazard. The minimum flow rate of the
valve must not be adjusted below the minimum safe
working rate of the appliance.
The pressure regulator is adjustable and has been factory set. If a different
setting is desired, follow these instructions.
1. Shut off all gas to the appliance.
2. Turn the thermostat to the lowest setting or Off position.
3. Remove the pressure tap plug at the valve outlet or in the manifold
pipe downstream of the valve.
4. Install a manometer or pressure gauge suitable for measuring the
desired orifice pressure.
5. Remove the seal screw at the end of the regulator stack.
6. Turn the gas on and place the thermostat at the highest setting to
cycle the ignition system.
7. Allow the system to stabilize. Adjust the screw in the regulator stack
to the desired reading on the manometer. (Turn clockwise to increase
the outlet pressure and counterclockwise to reduce the outlet
pressure.)
8. Reinstall the seal screw, which incorporates the proper size hole for
venting to the atmosphere. (It may be necessary to cycle the valve
several times to verify the desired outlet pressure.)
9. Turn off the gas supply and place the thermostat at the lowest setting.
10. Remove the pressure manometer and reinstall the pressure tap plug.
11. Turn the gas on and set the thermostat to the desired setting.
12. Check for leaks at the pressure tap plug with a soap solution before
leaving the site.
Regulator
Adjustment