BASO BGC258 Series BASOTROL - Manual (Page 2)

2 BGC258 Series CE Approved Gas Valve Installation Instructions
6. If you desire to measure the outlet pressure, use
the bottom cast pressure test fitting or use the
Y99AX pressure test fitting (see
Figure 2 ) and an
approved pip joint compound on the male threads
and screw the fitting into dither side of the valve,
which ever side is convenient, replacing the
pressure tap plug.
Figure 2: Y99AX-1 (1/8-27 NPT) Pressure Test Fitting
Y99AX -2 (1/8-28 BSPT) Pressure Test Fitting
7. Install the valve on the manifold; ensure the gas
flows through the valve body in the direction
indicated by the arrow on the body. If the valve is
installed with the gas flow in the opposite direction
of the arrow, leakage can occur.
Note: If installing a valve with threaded
connections, use an approved pipe joint
sealing compound on the male threads
before assembly. An optional thread
lubricant may have been factory applied to
the first two or three threads of the inlet and
outlet to avoid galling. Make sure that
excess compound is removed after
mounting. Threads of pipe and nipples
must be smooth and free of tears and
burrs. Steam clean all piping to remove
foreign substances such as cutting oil or
thread chips.
8. Connect the pilot tubing (when necessary) to the
threaded pilot connection on the underside of the
valve body (Figure 3) and run the tube to the pilot
burner within the appliance. Connect the pilot tube
to the valve with an optional compression fitting.
Outlet Pressure
Tap Connection
Pilot Tube
Connection
Figure 3: Underside of Valve with
Direct-Acting Regulator
9. Check for leakage before making any valve
adjustments.
a. Shut off the gas at the main manual shutoff
valve and open the pressure connection
between the manual shutoff valve and the
BGC258 valve.
b. Connect air tubing with a maximum pressure of
1-1/2 times the valve’s maximum operating
pressure (as indicated on the valve) to the
opened pressure connection.
c. Paint all valve body connections with a rich
soap and water solution.
If bubbles occur, this is an indication of a leak.
To stop a leak, tighten joints and connections.
Replace the part if the leak cannot be stopped.
If bubbles do not occur, remove the air tubing
and close the pressure connection.
10. Make wiring connections. See the Wiring section
for specific wiring instructions.
11. To measure the outlet pressure, apply power to
the valve and energizing both valve solenoids.
Use the outlet pressure tap connection on the
underside of the valve body to monitor the outlet
pressure. The outlet pressure tap is a bleed hole
with a cast spigot, sealed with a threaded brass
needle screw (Figure 3). To measure the outlet
pressure, turn the screw in a counterclockwise
direction one or two turns and fit a 9 mm diameter
flexible tube over the cast spigot. After all valve
adjustments have been made and the desired
outlet pressure has been obtained, remove the
flexible tube. Tighten the needle screw by turning
it clockwise with a slotted screwdriver until hand
tight, sealing the bleed hole.