AAON LZ Series, Установка, эксплуатация и обслуживание

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Warranties
Please refer to the limitation of warranties in
effect at the time of purchase.
Condenser Tube Inspection
The coil is leak tested before shipment.
AAON will not be responsible for loss of
refrigerant. It is the responsibility of the
installer to verify that the system is sealed
before charging with refrigerant. If the unit is
operated during low ambient temperature
conditions,
freeze protection for the
recirculating water system must be provided.
Freeze Protection
In order to prevent water temperatures from
dropping below 50°F, this unit is equipped
with a VFD on the fan motors when the
refrigeration system is operating.
Recirculating Water System
Electric sump heaters are available to keep
the sump water from freezing when the
refrigeration system is not operating. An
electric resistance heater is supplied in the
vestibule when sump heaters are selected.
Note : The condenser should not be operated
with the fan on and the pump cycled on and
off to maintain head pressure control under
any conditions. The unit is equipped with a
water temperature controller which varies fan
speed to maintain sump water temperature.
This unit is not equipped with a compressor
discharge pressure controller for fan speed
modulation and therefore cannot be operated
without water flow.
Startup
Do not start the evaporative-condensed
chiller or compressors without installation of
proper water treatment chemicals. Contact
your local water treatment expert for correct
selection of water treatment chemical,
adjustment of chemical feed and bleed rates.
Reverse osmosis and deionized water is
corrosive and cannot be used on the LZ
Evaporative-Condensed Chillers.
Cleanliness
Dirt and debris may accumulate in the sump
during shipping and storage. The sump
should be cleaned prior to startup to prevent
clogging the water distribution system. Any
surfaces that show contamination should be
cleaned ONLY with a commercial stainless
steel cleaner to restore the initial appearance.
The inlet screens should be inspected for
foreign material.
Storage
Pumps removed from service and stored,
must be properly prepared to prevent
excessive rusting. Pump port protection
plates must not be removed until the pump is
ready to connect to the piping. Rotate the
shaft periodically (At least monthly) to keep
rotating element free and bearings fully
functional.
For long term storage, the pump must be
placed in a vertical position in a dry
environment. Internal rusting can be
prevented by removing the plugs at the top
and bottom of the casing and drain or air blow
out all water to prevent rust buildup or the
possibility of freezing. Be sure to reinstall the
plugs when the unit is made operational.
Rust-proofing or packing the casing with
moisture absorbing material and covering the
flanges is acceptable. When returning to
service be sure to remove the drying agent
from the pump.