13
Operations
When a room is of unusually tight construction and has
a kitchen and/or bathroom ventilating fan, which may
be used for exhausting air to outdoors - or has a vented
fireplace - it is recommended that combustion air be
supplied to the enclosed room through intakes
extending to the outside of the building and terminating
in down turned fittings, suitably arranged to prevent
obstruction from snow or rain, and including a
protecting screen not smaller than 1/4 inch mesh.
Illustration showing air openings necessary to supply
air for combustion when heating appliance is installed
in an enclosed room.
Ventilating air openings - 1 square inch for each
1000 BTU per hour input.
Water Source
The heating module was designed to accept a cold
water electric pressure washer. The water source for
the attached pressure washer 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 9’ high pressure hose by pulling the
coupler collar back and then inserting it onto the
discharge nipple. Secure it by pushing the collar
forward.
NOTE:
If quick couplers do not match
pressure washer couplers, replace with free flow
couplers and nipples.
Attach the wand, trigger spray gun, and high pressure
nozzle as recommended by your pressure washer
manufacturer. Secure the pressure washer hose from
your electric cold water pressure washer to the
discharge coupling.
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, close all
openings from which gas can escape. Check system
for leaks immediately after turning gas on. 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
completely, 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 during
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. (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 pressure for propane gas is 11
w.c.i. By adjusting the gas valve pressure regulator
between 3 and 4 w.c.i. for the NG and 6 and 11 w.c.i. for
the LPG, a side range can be achieved.
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.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Summary of Contents for NG-3000
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