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22
Maintenance
Heating Coil
Condensation from Heating Coil
When cold water is being pumped into the water heater
coil, and the burner is on, condensation will form on the
coil and drip down into the burner compartment, giving
the appearance of a leaking coil, particularly on cold
humid days.
To Check Water Heater Coil for Leaks
With the main burner “OFF” start machine and allow it
to run a few minutes. Look into the burner compartment
with a drop light or flashlight. If no leaks are visible,
then water dripping from coil is from condensation.
Descaling Coil
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best preventa-
tive for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of Landa Coil Descaler (part
#8.914-296.0) will remove lime and other deposits
before coil becomes plugged.
Periodic descaling of the heating coil is recom-
mended so please consult your local Landa Dealer
for instructions.
Gas Valve Regulator Adjustment
Adjustment of the built-in regulator isn’t normally
necessary, since it is preset at the factory. However,
field adjustment may be accomplished as follows:
1.
Attach manometer at pressure tap port.
2.
Remove regulator adjustment screw cap.
3.
With a small screwdriver, rotate the adjustment
screw clockwise to increase or counterclockwise to
decrease gas pressure.
4.
Replace regulator adjustment screw cap.
Pressure Relief Valve
Each machine is equipped with a relief valve to relieve
pressure in the system when higher than normal
operating pressures are encountered. If operating
pressure of machine is found to be normal and relief
valve continues to leak, repair or replace the valve.
CAUTION: Relief valve can become obstructed by
deposits and must be unscrewed at least once per
year to allow discharge.
REF
PART NO.
QTY
DESCRIPTION
-
9.802633.0
1
REGULATOR, LP
ASSEMBLY
1
9.802-019.0
1
NIPPLE, 3/4” X 2”, BLACK
2
8.717-747.0
1
REGULATOR, R622CFF
FOR R932/28 & R932462
3
8.717-746.0
1
REGULATOR, HI
PRESSURE, R321H22
4
8.711-855.0
1
HOSE, 1/2” X 19”,
PROPANE
5
8.717-782.0
1
FITTING, PIGTAIL, FISHER,
M318 (INCLUDED WHEN
ORDERING PART 8.717-
746.0)
To
Pr
opane
Bottle
To
Pressure
Washer
Gas Inlet
Optional Propane
Regulator Kit
9.802-633.0
Landa VNG Operator’s Manual 8.913-939.0 - AB
Gas Valve Regulator Adjustment
On/Off
Switch
Outlet View
Inlet
Manifold
Pressure
Adjustment
Screw
Under Cap
Lines To
Pilot Light
Содержание Landa VLP Series
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Страница 64: ...64 Hose Spray Gun Landa VNG Operator s Manual 8 913 939 0 AB 1 2 4 5 6 3 Pressure Nozzle...
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