BASO G93 Series Combination Automatic Gas Valve - Manual (Page 2)

2 G93 Series BASOTROL Combination Automatic Gas Valve Installation Instructions
6. Mount the G93 on a horizontal manifold with the
magnetic operator pointed up (vertical) or in a
position not exceeding 90
° from vertical. The valve
may also be mounted on a vertical manifold in any
position around its axis (Figure 1).
Vertical mounting may
be 360º around its axis
with the gas flow either
up or down, but always in
the direction of the arrow.
Horizontal mounting limited
to 90º from upright.
90º 90º
fi
g
1
Figure 1: G93 Mounting Positions
7. Mount the valve to the pipework. 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. A sediment trap should also be installed in
accordance with the National Fuel Gas Code
(ANSI Z223.1).
8. Attach the thermocouple securely to the pilot
burner, and screw the terminal end to the BASO®
power unit terminal on the valve. Make sure this
connection is clean. Tighten the thermocouple
lead nut finger tight, plus a maximum of 1/8 turn.
Do not overtighten.
9. Pilot gas connections.
a. Internal Pilot Gas Valve Models receive pilot
gas internally from the valve body.
Note: Pilot gas flow comes out of either gas
valve top housing ports.
On internal pilot gas valve models, plumb the
pilot burner fitting to either of the pilot gas
ports on the valve. Plug the unused pilot gas
port on the gas valve. See Figure 2 and
Figure 3.
!
WARNING: Risk of Explosion or Fire.
Never connect an external gas line to an internal
pilot gas model. Pilot gas would flow freely in one
port and out the other, which could lead to an
explosion or fire and may result in severe personal
injury or death.
!
WARNING: Risk of Explosion or Fire.
Verify that there are no gas leaks by testing with
appropriate equipment. Never use a match or lighter
to test for the presence of gas. Failure to test
properly can lead to an explosion or fire and may
result in severe personal injury or death.
10. 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
G93 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.
11. Perform the Checkout section before leaving the
installation.