Regulator Installation - Vulcan-Hart MG12 Service Manual

1. Connect the manometer to the pressure tap provided on the rear manifold pipe (see Fig. 9).
2. Check the reading. The reading should be 3.7" Water Column for natural gas and 10.0" Water
Column for propane gas.
3. If reading is incorrect and the proper line pressure has been verified, then adjust the regulator.
Using a standard flat blade screwdriver, remove the regulator adjustment cap (Fig's. 13 & 14).
4. Insert the screwdriver into the adjustment shaft and turn the adjustment stop while watching the
manometer until the correct pressure reading is achieved. Clockwise rotation of the stop increases
pressure; counterclockwise rotation decreases pressure.
5. After resetting the pressure to the correct setting, reinstall the adjustment cap and remove the
testing equipment.

REGULATOR INSTALLATION

Tools Required: Slip joint plier or pipe wrench.
The pressure regulator must be attached to the range in the horizontal position with the arrow pointing
in the direction of gas flow, unless at some point in time the regulator has been recalibrated (see Fig. 12).
1. Turn main gas supply OFF.
2. Remove old regulator.
3. Wrap the manifold pipe threads of the insulating end with pipe thread sealant.
4. Install new regulator as indicated above.
5. Turn main gas supply ON and check regulator connections for gas leakage using a soap and water
solution. If no leaks are found, return range to full operation. If leak is detected, turn main gas valve
OFF and eliminate leakage.
Fig. 13
– 15 –
Fig. 14