BASO BGD278 Series BASOTROL CE Approved Gas Valve - Manual (Page 2)

2 BGD278 Series BASOTROL CE Approved Gas Valve Installation Instructions
6. Use an approved pipe joint sealing compound on
the male threads before assembly. Remove excess
compound after mounting the valve to the
pipework. Threads of the 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.
7. 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 pipe joint compound on the male threads
and screw the fitting into either 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
8. Check for leakage.
a. Shut off the gas at the main manual shutoff
valve and open the pressure connection
between the manual shutoff valve and the
BGD278 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.
9. Make wiring connections. Refer to the Wiring
section for specific wiring instructions.
10. Determine the outlet pressure by applying 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
(see Figure 3). To monitor 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.
11. Check for leakage at the bleed hole. Paint the
bleed hole with a rich soap and water solution (or
use acceptable gas leak detection equipment). If
bubbles occur, this is an indication of a gas leak. To
stop a leak, tighten the needle screw. Replace the
valve if the leak cannot be stopped.
Outlet Pressure
Tap Connection
Pilot Tube
Connection
Figure 3: Underside of Valve
12. If necessary, set the valve to the desired outlet
pressure. Refer to the Setup and Adjustments
section for specific adjustment procedures. After
making valve adjustments, ensure that the leak-
limiting seal cap is tight. See Figure 4.
13. Before leaving the installation, observe at least
three complete operating cycles to ensure that all
components are functioning correctly.
Leak-Limiting
Seal Cap
Figure 4: BGD278 Model with Left-Handed
Top Adjust Regulator