Kärcher Landa VLP Series, Руководство оператора

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14
Operations
Sampling Port A port for sampling flue gases and
measuring the flue gas temperature should be placed
18” above the flue collar. The port should be covered
when sampling is not being performed. The size of the
port should be only slightly larger than the probe for the
flue gas analyzer.
Rain Cap A rain cap should be installed on top of the
stack to prevent rain water, leaves and debris from
entering the stack. Your installer may also recommend
specialty caps for high wind areas or cold weather
zones to help prevent back drafting. 8.717-731.0 - 10"
Raincap, 8.717-732.0 - 12" Raincap
Vents penetrating ceilings or walls should be double-
wall approved appliance vents and should be one to
two inches from combustibles. Vents passing through
enclosed spaces and vents exposed to the weather
should also be the double-wall type. Sometimes vents
have to be built of such great length that they come
apart at their joints under their own weight. These
should be screwed together at the joints with sheet
metal screws, usually three per joint. If the inspector
indicates that the vent is too close to combustibles, it
may be necessary to chisel away some of the combus-
tible or route the vent pipe around the combustible. The
cross-sectional area of any flue shall not be less that
the cross-sectional area of the flue vent connection
outlet of machine.
Water Source
The water source for the 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.
High Pressure 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 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
installing the gas piping. The piping should not be
supported 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 or clothes chute.
Before turning gas under pressure into piping, all
openings from which gas can escape should be closed.
Immediately after turning on gas, the system should be
checked for leaks. This can be done by watching the 1/
2 cubic foot test dial for 5 minutes for 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
completely, purge the system of air.
DO NOT bleed the
air inside an enclosed room.
During pressure testing of the system at test pressures
in excess of 1/2 PSIG, the pressure washer and its indi-
vidual shut-off valve must be disconnected from gas
supply piping system or damage to the gas valve will
occur.
Gas Pressure
The ideal incoming gas pressure is 11 w.c.i (water
column inches). Minimum is 9 w.c.i., maximum is 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 pressure for propane gas is 10 w.c.i. By
adjusting the gas valve pressure regulator between 3
and 4 w.c.i. a side range can be achieved for natural
gas.
If the desired input rating cannot be obtained within the
above manifold pressure adjusting range, then the next
size larger or smaller burner orifice should be used.
The gas pressure coming out of the regulator and going
to the burner ring has been factory set for elevations of
0 to 2000 ft. Altitudes greater than 2000 ft will require
adjustments to the gas manifold pressures. Consult
your local service dealer for high altitude adjustments.
In Canada, certification for installation at altitudes over
4500 feet above sea level is the jurisdiction of local
authorities. You should not readjust the burner ring gas
pressure. If you replace your gas valve, you will need to
adjust the new valve. Refer to your machine’s
specifi-
cation plate for the correct pressure setting. Follow the
installation and adjustment instructions provided with
your replacement valve.
NOTE: Air for combustion and ventilation along with
exhaust flue sizing must conform to methods outlined in
current American Standard (ANSI-Z223.1) National
Fuel Gas Code or National Standard of Canada CSA-
149.1 and CSA-149.2 “Installation Code for Gas
Burning Appliances”.
Landa VNG Operator’s Manual 8.913-939.0 - AB