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V4943/V8943B,C,N; V4944/V8944B,C,L,N REGULATING DIAPHRAGM GAS VALVES
7 65-0214—08
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained experienced flame safeguard
control technician.
4. After installation is completed, check out product opera-
tion as provided in these instructions.
WARNING
Explosion hazard and electrical shock hazard.
Can cause serious injury or death.
1. Turn off gas supply before starting installation.
2. Disconnect power supply before beginning
installation to prevent electrical shock and equipment
damage.
3. Do not remove seal over valve inlet or outlet until
ready to connect piping.
Prepare Piping and Install Valve (Fig.
10).
1. Use new, properly reamed pipe free from chips.
2. Do not thread pipe too far. Valve distortion or malfunction
can result from excess pipe in valve.
3. Apply good quality pipe dope resistant to the action of LP
gas; put a moderate amount only on the pipe threads. If
pipe dope lodges on the valve seat, it will prevent proper
closure.
4. Install the valve in a horizontal pipe line in an upright
position with the gas flow in the direction indicated by the
arrow on the casing. The valve must be upright
(electrical connection tower in the up position) on a
horizontal axis with respect to the inlet connection
(see Fig. 10). Certain models may be mounted in the
limited horizontal position (any position from upright to
90 degrees to upright on an horizontal axis with respect
to the inlet connection. See Specifications section.)
5. Apply a parallel jaw wrench only to the flat next to the
pipe being inserted. A wrench applied to the valve body
itself or to the end farthest from the pipe being inserted
can distort the casting and cause a malfunction.
6. The gas flow must be in the same direction as the arrow
on the bottom of the valve body.
WARNING
Explosion and Fire Hazard.
Can cause serious injury or death.
If flow is not in direction of arrow, valve may not
shut off; which can cause excess gas and harm to
equipment or personnel.
7. Make electrical connections as illustrated in the wiring
diagrams (see Figs. 11–14).
8. Turn on the main gas and, with a soap solution, check
the valve installation for leaks.
9. The V4943/V8943, V4944/V8944 combination valve
pressure regulating sections are provided with integral
vent limiters.