2.1.4.5
Purge System
Provide chiller with an automatically or manually controlled purge system
consisting of a motor driven, jet type, or viscosity type, high vacuum pump
with separators, pipe connections, and controls. Provide positive
protection against return air to unit when evacuator is not in operation.
2.1.4.6
Crystallization
Provide for automatic decrystallization or anti-crystallization, in
accordance with manufacturer's standard. If decrystallization is used,
provide and arrange for supplemental heating elements if required for
automatic operation.
2.1.4.7
Refrigerant and Absorber
Absorber unit shall be fully charged with water and a nontoxic absorber
after installation. Refrigerant and inhibitors shall not generate films
that would reduce machine efficiency by coating tubes. The corrosion
inhibitor shall not cause the solution to be classified as hazardous waste
under the Resource Conservation and Recovery Act.
2.1.4.8
Absorption Unit Pumps
Pumps as required, but not including chilled-water and condenser-water
pumps, shall be provided as part of the liquid chilling plant and be
factory mounted. Pumps shall be hermetic type provided with suction and
discharge stop valves, when required by the manufacturer, and be complete
with piping, fittings, and other required devices. Magnetic
across-the-line starter with overhead protection shall be provided in the
control panel for each pump.
2.1.4.9
Cleaning Brushes
Furnish chiller with two brushes, having jointed rods, suitable for
2.1.4.10
Charging and Testing
Unless fully assembled, tested, evacuated, and charged at factory,
components shall be dried and sealed to prevent corrosion of internal
surfaces prior to field assembly. Assemble, test, evacuate, and charge
units under supervision of manufacturer's representative. Periodic tests
shall be readily made on the concentration of the inhibitor and lithium
bromide solution with a field test kit furnished by manufacturer, or as
recommended by manufacturer.
2.2
SPLIT-SYSTEM WATER CHILLERS, REMOTE CONDENSER
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NOTE: Specify applicable ratio after consulting
current literature to ensure an energy-efficient
system is provided. The ratios specified shall
permit unlimited competition among at least three
manufacturers.
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ARI 550/590. Base capacity and power ratings, at the conditions indicated
and specified, on the test requirements of ARI 550/590. Power input shall
SECTION 15601N
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