4
AGR 070A through 100A Product Manual AGR-3
Design Advantages
Construction
Factory assembled and mounted on heavy-gauge powder coat painted, galvanized steel channel base.
This base distributes the unit weight for roof loading. Flexible installation is possible by virtue of the
unit’s small footprint and low sound level.
Compressors
The AGR product line uses Copeland DISCUS
valve semi-hermetic compressors. These rugged
compressors are designed for R-22 and the high loading associated with air-cooled applications. They
operate under lighter loading with R-134a.
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 protection at high compression
ratios as required by ANSI/ASHRAE 15 Safety Code.
Main bearings are solid cast bronze insert type with oversized bearing areas 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 force-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 metal particles that enter the crankcase. The oil supply is filtered
through a large area oil strainer. A crankcase heater minimizes oil dilution by refrigerant at compressor
startup.
Condenser Coils
Condenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern.
The coils are mechanically expanded into McQuay lanced and rippled aluminum fins with full fin
collars. An integral subcooler circuit provides subcooling to greatly reduce the possibility of liquid line
flashing. The exterior condenser coils are fitted with a vinyl-coated wire mesh protective guard.
Condenser Fans and Motors
Multiple direct drive dynamically balanced propeller fans operate in formed venturi openings at low tip
speeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fan
guard protects each fan.
Each condenser fan motor is heavy-duty, 3-phase with permanently lubricated ball bearings and
inherent overload protection. SpeedTrol option includes a single-phase motor with fan speed control on
the lead fan per circuit. Fan motors on the AGR 070-100A are totally-enclosed-air-over (TEAO)
construction providing optimum environmental protection.
Copeland's Compliant Scroll® is a registered trademark of the Copeland Corporation, Sydney, Ohio.
To Next Page
Loading...
Need help?
General