Prochem Legend XL - Manual (Page 28)

MAINTENANCE
86037400 02/16/07
4-3
KEY CHECKPOINTS
Note: Initiation of a planned preventative
maintenance program will assure that your unit
has optimum performance, a long operating life,
and a minimal amount of "down" time.
EXTERNAL FUEL PUMP MAINTENANCE
The power plant for the unit receives fuel from the
main gas tank of your van/truck. An external fuel
pump that provides this fuel is located on the
underside of the van/truck. Loose fittings and hose
connections will cause your unit to perform poorly.
Follow the recommended fuel pump maintenance in
the Maintenance Schedule in this manual. Refer
any additional questions to your dealer.
CHEMICAL SUPPLY SYSTEM
MAINTENANCE
The chemical supply system pulls chemicals from
your chemical bottle utilizing a pump that works off
the water pump pulsing. Any clogged filters or loose
connections will result in a chemical supply system
malfunction or a malfunction at the cleaning tool.
Maintenance of the solution outlet check valve and
strainer are vital to effective cleaning operation and
minimal unit downtime. Additionally, the hoses
related to supplying water and chemical to the outlet
manifold are under high pressures and experience
thermal expansion and contraction. Periodic
inspections of these hoses for tears, cracks, and
failing connectors are necessary to avoid unwanted
leaks. To keep your chemical system functioning
properly, follow the chemical pump and solution
outlet maintenance in the Maintenance Schedule in
this manual. Refer any additional questions to your
dealer.
HEAT EXCHANGER SYSTEM
MAINTENANCE
The heat exchange system in your unit transfers
energy between the unwanted heat of the power
plant /blower and the solution supply system. The
heat transfer of this system is highly dependent on
the surface area contact in the heat exchanger cores
located in the heat exchanger box. This surface
area amount is adversely minimized when the
supplied water is not softened to recommended
levels. Hard water will result in scaling on the inside
walls of the heat exchanger tubes. It is
recommended that you use a dealer approved water
softener to avoid premature heat exchanger core
failure. Contact your local dealer for advice on the
water hardness levels in your area.
Additionally, the heat exchanger tubes are very
sensitive to freezing conditions. As the water
freezes during cold conditions, it expands in the heat
exchanger tubes and causes damage. Often the
tubes are cracked and require the replacement of
the heat exchanger core. Refer to the Freeze
Protection instructions section in this manual. Refer
any additional questions to your dealer.
VACUUM PUMP MAINTENANCE
(Refer to manufacturer’s manual for specific
maintenance instructions)
The total function of the unit is based around the
performance of the vacuum pump. Heat transfer
used to raise the temperature of the solution is
gained from the air drawn by the vacuum pump and
solution is removed from the carpet with the vacuum
suction of the vacuum pump. General maintenance
actions for the vacuum pump as listed in this manual
are vital to prolonged vacuum pump operations.
Daily lubrication of the pump is required to avoid
seizure of the system. Also, waste tank filters and
strainers must be maintained to prevent unwanted
debris from entering the vacuum pump.