©Johnstone Supply eCatalog 216

COMPRESSORS Semi-Hermetic

Why Did The Compressor Fail? Compressors typically fail because of a system problem or other failed component. It is imperative that the problem be diagnosed and corrective measures put in place or

the replacement compressor will also fail. Field examination of a failed semi-hermetic compressor will usually reveal the cause of failure and will point to the system problem.

Inspection Shows

Cause

Remedy

Worn pistons and cylinders with no evidence of overheating (air cooled com pressors). Center and rear bearings worn or seized, dragging rotor/shorted stator, progressively scored crankshaft, worn or broken rods (suction cooled compressors). Worn or scored rods/bearings. Broken rods from seizure. Crankshaft worn erratically. Broken rods, reed valves or crankshaft, loose or broken valve backer bolts, blown head gasket. Discolored valve plate, burned valve reeds, worn pistons, rings and cylinders, stator spot burn from metal debris.

Refrigerant Floodback

Correct a low load condition; check for proper superheat at the compressor; install an accumulator to protect the compressor against uncontrollable liquid return.

Flooded Starts

Check crankcase heater operation; install pumpdown solenoid.

Liquid and/or Oil Slugging

Check for proper superheat at the compressor; correct a low load condition; install an accumulator; install pump down solenoid. Correct a low load condition; correct any high discharge pressure conditions; insulate suction lines; provide correct compressor cooling. Check oil failure switch operation; check refrigerant charge; correct low load conditions/short cycling; check pipe sizing and/or oil traps; check for inadequate defrosts. Check for proper voltage; check for unbalanced voltage; check for inadequate motor cooling. Check for proper and operational motor protection, replace contactor. Check for proper wiring; check start capacitor and/or start relay; check for compressor overloading. If not caused by mechanical problems, check for spikes or surges of high current flow.

High Discharge Temperature

All rods and bearings worn or scored, crankshaft uniformly scored, rods broken from seizure, little or no oil in crankcase.

Loss of Oil

All windings are uniformly burned.

General Burn

Two phases of a three phase motor overheated or burned.

Single Phase Burn

Start Winding Burn

Only the start winding of a single phase motor is uniformly overheated or burned. A localized burn within a winding, between windings, or from windings to ground. Breakdown of insulation between terminals and compressor body.

Spot Burn

Shorted Terminals

Check for over torquing of terminals.

Copeland Semi-Hermetic Compressors Remanufactured by A-1 Compressor

• Meets or exceeds industry standards • All used compressors are completely disassembled, and any broken or damaged components are discarded and run tested • Shipped with POE oil on models with “E” in model number after HP rating and alkylbenzene oil for all other; all models can be special ordered with POE oil

• Available only at participating Johnstone Supply stores • Other units by Copeland, Carrier, Trane, Dunham-Bush and more are available by special order at participating stores Note: Used compressor body must be exchanged with purchase, otherwise there will be an additional core charge.

R12 Application

R22 Application

R502 Application

Suction Conn.

Discharge Conn.

Start Capacitor

Run Capacitor

Order # Mfg. #

HP

Volts

Phase

Relay

Wt. Lbs.

B81-363 B72-295 B72-296

KAEB-005A-IAA 1/2 KAMB-007E-CAA 3/4 KAMB-007E-CAV 3/4

115 115

1 1 3 3 3 3 3

M H H H M M

— — 1/2"

3/8" 3/8" 3/8" 7/8"

G22-658 — B10-036 85 G33-067 G21-924 B11-873 89 G22-014 G21-891 B11-873 89

L L

L L

5/8" 5/8"

200/230 208-230 208-230 208-230 208-230

B92-348 MRF2-050A-TFC 5 B92-349 9RB1-076A-TFC 7-1/2

— — 1-3/8"

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

275 330 330 350 405 370 370 430 460 445 500 525

— L — L

1-3/8" 1-3/8" 1-3/8" 1-5/8" 1-3/8" 1-3/8"

1-1/8" 1-1/8" 1-1/8" 1-1/8" 1-1/8" 1-1/8" 1-1/8" 1-3/8" 1-3/8" 1-3/8" 1-3/8"

B92-350 B92-353 B92-352

9RS3-076A-TFC 7-1/2 9RC1-101A-TFC 10 4RA3-100A-TSK 10

— H

M

208-230/460 3

H

— L

B92-354 9RS1-150A-TSC 15 B92-900 9RS1-150A-TFD 15

208-230

3 3

— H — H — H — H — H — H H

M M

460

B92-907

4RE2-200A-TSK 20

208/230-460 3 208/230-460 3 208-230/460 3 208/230-460 3 208-230/460 3

— 1-5/8"

B92-904 6RA4-200A-TSK 20

— L

2-1/8"

B92-357

4RK2-250A-TSK 25

— 2-1/8" — 2-1/8" — 2-1/8"

B92-909 6RN2-300A-TSK 30

B92-359

6RN2-350A-TSK 35

1198

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