BASO VLV49A Series - Manual (Page 8)

8 VLV49A Series Universal Replacement Gas Valve Technical Bulletin
7. Remove Screws A and B holding the ignition control assembly to the
valve and plate assembly (see Figure 1). These two screws are located
on the bottom surface of the ignition control assembly.
8. Remove the ignition control.
9. Disconnect the pilot burner tubing from the pilot tap connection on
the gas valve (see Figure 1).
10. Verify (when looking on the inlet of the valve) that the location of the
grommet and wire leads on the old valve and new replacement valve
are on the same side.
If they are not on the same side, remove the grommet of the new
replacement valve and insert it into the other side of the mounting
plate (see Figure 4). This allows the placement of the ignition control
spark transformer over the outlet of the valve instead of the inlet.
Remove grommet
and wires from here.
Replace grommet
and wires here.
Removable Portion
of Mounting Plate
Removable Portion
of Mounting Plate
Figure 4: Grommet Locations
11. Remove the old valve from the manifold and install the new
replacement valve. Ensure the gas flows through the valve body in the
direction indicated by the arrow on the valve body. If the valve is
installed with the gas flow opposite the arrow, leakage can occur.
A thread lubricant has been factory applied to the first two or
three threads of the valve inlet and outlet to avoid galling. Use an
approved pipe-joint sealing compound on male threads before
assembling. Take care that excess compound does not work into the
valve and get onto the valve seats. Threads of pipe and nipples must
be smooth and free of tears and burrs.
12. Reconnect the pilot burner tubing at the pilot tap connection.
13. Fasten the ignition control assembly to the valve and plate assembly
with the screws provided with the replacement valve.
14. Break off the portion of the plate that protrudes if it interferes with
surrounding surfaces (see Figure 4).