Mbsmpro.com, Compressor, KCJ513HAG-S424H, 1.2 HP, Copeland, R134a, HBP, 12300 Btu/h, 230V, CSCR, Water Cooler, Air Conditioning
The Heavyweight Champion of HBP: Copeland KCJ513HAG-S424H
In the realm of commercial refrigeration, few names carry as much weight as Copeland. If you are an artisan bricoleur repairing a large water cooler, a bottle chiller, or a specialized air conditioning unit, encountering the KCJ513HAG-S424H means you are dealing with a robust, high-torque machine. This isn’t a small domestic compressor; it is a 1.2 HP beast designed to move heat fast.
The KCJ series (Reciprocating) is legendary for its durability in high-ambient temperatures (common in Tunisia and the Middle East). Unlike rotary compressors that might struggle when the condenser gets clogged with dust, this reciprocating connecting rod design keeps pumping. The “HAG” suffix is your key identifier: ‘H’ stands for High Temperature (HBP), and ‘G’ confirms it is built for R134a gas.
Why 1.2 HP Matters for High Back Pressure (HBP)
This compressor is a “High Back Pressure” specialist. It is designed to operate where the evaporator temperature is relatively high (like +7.2°C for AC or water cooling).
- Cooling Capacity: At standard ASHRAE conditions, it delivers a massive 12,300 Btu/h (approx 3,604 Watts).
- Efficiency: It uses a CSCR (Capacitor Start Capacitor Run) motor configuration. This means it has a start capacitor to get the heavy piston moving and a run capacitor to keep the amperage low (approx 6.5 Amps) while running.
Technical Specifications: The Data Sheet
Below is the precise data for the KCJ513HAG-S424H.
| Feature | Specification |
| Model | KCJ513HAG-S424H |
| Brand | Copeland (Emerson) |
| Nominal HP | 1.20 HP (approx. 1 Ton) |
| Displacement | 38.04 cc/rev |
| Refrigerant | R134a (Tetrafluoroethane) |
| Application | HBP (High Back Pressure) / AC / Heat Pump |
| Voltage | 220-230V ~ 50Hz |
| Cooling Capacity | 12,300 Btu/h (@ +7.2°C Evap) |
| Input Power | 1374 Watts |
| Input Current | 6.5 Amps |
| Motor Circuit | CSCR (Capacitor Start & Run) |
| Start Capacitor | 80-100 µF / 230V |
| Run Capacitor | 36 µF / 440V |
| Oil Type | POE (Polyolester) |
| Oil Charge | 890 ml |
| LRA (Locked Rotor) | 39 A |
Comparison: Copeland KCJ513HAG vs. Tecumseh & Danfoss
When this specific Copeland is unavailable, you need a backup plan. Here is how it compares to other market leaders in the 1 HP+ R134a category.
| Compressor | Brand | Nominal HP | Displacement | Cooling (HBP) | Verdict |
| KCJ513HAG | Copeland | 1.2 HP | 38.0 cc | 12,300 Btu | Best for rugged, high-vibration environments. |
| TAG4518Y | Tecumseh | 1.5 HP | 53.2 cc | 15,000 Btu | Slightly larger; good upgrade if space permits. |
| CAJ4511Y | Tecumseh | 1 HP | 32.7 cc | 10,500 Btu | A bit weaker; only use for smaller loads. |
| MT18 | Maneurop | 1.5 HP | 30.2 cc | 13,000 Btu | Excellent alternative, but physically larger/heavier. |
Exploitation Note: If you replace a rotary compressor with this reciprocating model, ensure you add a liquid receiver. Reciprocating pumps are less tolerant of liquid slugging than rotaries!
Exploitation: Installation & Troubleshooting
For the technician, installing the KCJ513HAG requires attention to detail:
- Capacitor Logic: This unit requires the start capacitor to fire. If you hear a “hum” but no start, check the potential relay (AC85001) and the 80-100µF start capacitor. They are the most common failure points, not the compressor itself.
- Oil Management: It comes charged with POE oil. If you are retrofitting an old R12 system (rare these days, but possible), you must flush the lines completely. R134a + Mineral Oil = Sludge.
- Vibration: This is a heavy piston compressor (~22.5 kg). Ensure the rubber grommets are fresh. If you bolt it down too tight without the rubber play, the vibration will crack the copper discharge line within weeks.
- Heat Management: At 54.4°C condensing temp, this unit works hard. Ensure the condenser fan is clean and spinning at full RPM (usually 1300 RPM for these units).
Focus Keyphrase:
Copeland KCJ513HAG-S424H Compressor Specs R134a
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Detailed specs for Copeland KCJ513HAG-S424H (1.2 HP, R134a). Discover cooling capacity, capacitor values (CSCR), and Tecumseh comparisons for water coolers and AC repair.
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Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Copeland Compressor, KCJ513HAG, 1.2 HP Compressor, R134a HBP, Commercial Refrigeration, Water Cooler Repair, KCJ513HAG-S424H, Emerson Climate
Excerpt:
The Copeland KCJ513HAG-S424H is a powerhouse 1.2 HP compressor designed for high-demand cooling. Built for R134a applications like large water coolers and AC units, it delivers 12,300 Btu/h reliability. This guide covers its CSCR electrical setup, 38cc displacement, and how it compares to Tecumseh alternatives.