McQuay ALR 110F, Руководство по эксплуатации продукта

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4 ALR 110F – 150F Product Manual ALR2-3
Design Advantages
Construction
The ALR 110F through 150F are factory assembled and mounted on a rugged steel channel base. The
channel base distributes the unit weight for low roof loading. Lifting holes in the base simplify
rigging. Optional wire mesh base guards are available to prevent intrusion to the area under the coils.
The units pass the ASTM B117 500 hour salt spray test.
Compressors
ALR 110F through 150F chillers use Copeland DISCUS

semi-hermetic compressors. These
compressors are designed for Refrigerant 22 and the high loading associated with air-cooled
applications.
Semi-hermetic, 1750 rpm induction type motors are used. The motors are refrigerant-gas cooled.
Solid-state modules in the motor terminal box respond to temperature sensors imbedded in all three
motor windings, providing inherent thermal overload protection for all run and start conditions.
The compressor housing is constructed from closed grained, high nickel content, alloy cast-iron with
no bolted joint between the motor and compressor. The housing includes a cast-iron cylinder head
and stator cover, and a crankcase oil sightglass. A suction strainer built into the compressor in the gas
stream between the suction service valve and the motor, filters out foreign and abrasive particles. An
internal relief valve relieves discharge pressure to the suction side for safety protection at high
compression ratios as required by ANSI/ASHRAE 15 Safety Code.
Main bearings are solid cast bronze insert type with oversized bearing area that result in ultra-low
bearing loading.
The crankshaft is die-forged, high strength iron alloy with integral counterweights, statically and
dynamically balanced for smooth operation.
Connecting rods are lightweight aluminum with integral bearing surfaces on the crankshaft and piston
ends. Pistons are close grain cast iron with oil and compression rings. Piston pins are full floating
type for long life.
Compressors have a forced-feed lubrication system with positive oil displacement, a reversible oil
pump, and an operating oil charge. The pump feeds oil through rifle drilled passages in the crankshaft
to all bearing surfaces. Magnetic plugs trap magnetic particles that enter the crankcase. The oil
supply filters through a large area oil strainer. A crankcase heater minimizes oil dilution by refrigerant
at start-up.
Condenser Coils
Condenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern.
The tubes are mechanically expanded into McQuay lanced and rippled aluminum fins with full fin
collars. See the Application Section of this manual for optional corrosive resistant fin material and
coatings. An integral subcooler circuit provides subcooling to effectively eliminate the possibility of
liquid flashing. Vinyl coated wire mesh coil guards for fin protection are supplied as standard.
Condenser Fans and Motors
Multiple direct drive propeller fans operate in formed bell shaped orifices at low tip speeds for
maximum efficiency and minimum noise and vibration. A heavy-gauge close mesh fan guard protects
each fan.
Each condenser fan motor is heavy-duty, 3-phase with permanently lubricated ball bearings and
inherent overload protection.