Landa VNG4-2000 Operator'S Manual Download

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96-610 • LANDA VNG/VLP • REV. 9/05

PRESSURE

ASHER

OPERA

OR’S MANU

Water Source:

Water source for machine should be supplied by a 5/8"
I.D. garden hose with a city water pressure of not less
than 30 psi. If the water supply is inadequate, or if the
garden hose is kinked, the machine will run very rough
and the burner will not fire.

Water Connection:

Connect the high pressure hose by pulling the coupler
collar back and then inserting it onto the discharge
nipple. Secure it by pushing the collar forward.

Attach the wand into the trigger spray gun using teflon
tape on the pipe threads to avoid leaks.

Inspection and Testing Gas Piping:

The building structure should not be weakened by in-
stalling the gas piping. The piping should not be sup-
ported by other piping, but should be firmly supported
with gas hooks, straps, bands or hangers. Butt or lap
welded pipe should not be run through or in an air duct.

Before turning gas under pressure into piping, all open-
ings from which gas can escape should be closed. Im-
mediately after turning on gas, the system should be
checked for leaks. This can be done by watching the 1/
2 cubic foot test dial and allowing 5 minutes to show
any movement, or by soaping each pipe connection
and watching for bubbles. If a leak is found, make the
necessary repairs and repeat the above test.

Defective pipes or fittings should be replaced and not
repaired. Never use a flame or fire in any form to locate
gas leaks; use a soap solution.

After the piping and meter have been checked com-
pletely, purge the system of air. DO NOT bleed the air
inside an enclosed room.

The appliance and its individual shut-off valve must be
disconnected from the gas supply piping system dur-
ing the pressure testing of that system at test pressure
in excess of 1/2 psig or damage to the gas valve will
occur.

Gas Pressure:

The ideal incoming gas pressure is 11 w.c.i. (water
column inches –minimum 6 w.c.i., maximum 14 w.c.i.
or 1/2 psig). The correct operating manifold pressure
for natural gas is 3.5 w.c.i. The operating manifold pres-
sure for propane gas is 11 w.c.i. The gas valve pres-
sure regulator can be adjusted between 3 and 4 w.c.i.
natural gas or 6 and 11 w.c.i. for propane.

If the desired input rating cannot be obtained within the
above manifold pressure adjusting range, the next size
larger or smaller burner orifice should be used.

WARNING & CHECK LIST

WARNING

1. Installation or servicing of gas appliances and con-

trols must only be performed by qualified person-
nel. After installation or servicing, test manual valve,
operating valves, pressure regulator, and automatic
shut-off valve for proper operation.

2. Install in a suitable dry location. The machine must

be located in an area properly protected from the
weather.

3. Shut off gas and electricity before starting installa-

tion or service. Turn gas back on to test or operate.

4. DO NOT connect pressure washer before pres-

sure testing gas piping. Damage to gas valve may
result (6 - 14 w.c.i. or 1/2 psig).

5. DO NOT insert any object other than suitable pipe

or tubing in the inlet or outlet of the gas valve. In-
ternal damage may occur and result in a hazard-
ous condition.

6. DO NOT grip gas valve body with a pipe wrench or

vise. Damage may result causing gas leakage. Use
inlet or outlet bosses or a special body wrench.

7. DO NOT short the gas valve terminals.

8. DO NOT allow any flame to impinge on the regula-