Mbsmpro.com, Compressor, Danfoss, SC15G, 104G8525, 1/2 hp, MBP/HBP, R134a, 738 W, 3.1 A, 1Ph 220-240V 50Hz, CSIR, -15°C to +15°C, Commercial Cooling

In the world of commercial refrigeration, the Danfoss SC15G stands as a robust pillar of reliability. Precision-engineered in Germany, this compressor is designed to handle the rigorous demands of Medium and High Back Pressure (MBP/HBP) systems. Whether it is powering a large beverage cooler or a professional display cabinet, the SC15G provides the thermal displacement necessary to maintain consistent temperatures even in high-traffic commercial environments. Its heavy-duty construction and high-starting torque make it a preferred choice for field technicians who prioritize longevity over temporary fixes.

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Technical Data Sheet

Feature	Specification
Model	Danfoss SC15G (104G8525)
Utilisation (mbp/hbp/lbp)	MBP / HBP
Domaine (Freezing/Cooling)	Cooling (Professional)
Cooling wattage at -10°C	738 Watts
Cubic feet can this compressor cool?	20 – 25 cu.ft
Litres can this compressor cool?	550 – 700 Liters
Kcal/h	635 Kcal/h
Oil Type and quantity	POE, 550 ml
Horsepower (HP)	1/2 HP
Refrigerant Type	R134a
Power Supply	220-240V / 50Hz / 1Ph
Cooling Capacity BTU	2520 BTU/h (at -10°C) / 5050 BTU/h (at +7.2°C)
Motor Type	CSIR (Capacitor Start – Induction Run)
Displacement	15.28 cm³
Winding Material	100% Copper
Pression Charge	18 – 24 bar
Capillary	0.042″ to 0.050″ (Application dependent)
Modele Frigo / Refrigerator	Large Bottle Coolers, Display Cases, Laboratory Fridges
Temperature function	-15°C to +15°C
With fan or no	Fan cooling is Mandatory (250 m³/h)
Commercial or no	Commercial Grade
Amperage in function	3.1 A to 3.5 A
LRA	14.8 A
Type of relay	Electromagnetic / Starting Relay
Capacitor and value	Start Capacitor: 80 µF
Country of origin	Germany

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Efficiency Metrics (COP)

Evaporating Temp (°C)	Cooling Capacity (Watts)	Power Consumption (Watts)	COP (W/W)
-15	560	380	1.47
-10	738	425	1.74
-5	950	470	2.02
0	1195	515	2.32
+5	1480	565	2.62
+10	1805	615	2.93
+15	2170	665	3.26

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Engineering Insights: SC15G vs. Standard Models

The SC15G belongs to the “SC” family, which features a larger housing compared to the “TL” or “FR” series. This extra internal volume allows for better motor cooling and a higher tolerance for liquid slugging, which is common in commercial settings where doors are frequently opened.

When comparing this to a standard domestic 1/2 HP compressor, the Danfoss SC15G offers a much higher Starting Torque (HST). This means it can start against high head pressures without tripping the protector, a critical feature for systems utilizing thermostatic expansion valves (TXV).

Installation Notices and Benefits

• Thermal Protection: This unit requires external forced air cooling. Never install the SC15G in a restricted enclosure without a condenser fan.
• Lubrication: The POE oil used is highly sensitive to moisture. Ensure the system is open for the shortest time possible during a compressor swap.
• Longevity: Its copper-wound motor provides superior resistance to burnout compared to budget-grade aluminum alternatives.

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5 Compressor Replacements (Same Gas: R134a)

1. Embraco: NEK6213Z
2. Tecumseh: AE4456Y-FZ
3. Secop: SC15G (104G8520)
4. Aspera: NE6213Z
5. Huayi: HYE15YG

5 Compressor Replacements (Other Gas: R404A/R290)

1. Secop: SC15CL (R404A) – Note: Oil/Valve change required.
2. Embraco: NEK6217GK (R404A)
3. Cubigel: MS18TB (R404A)
4. Secop: SC15CNX (R290)
5. Tecumseh: CAJ9461Z (R404A)

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Focus keyphrase: Danfoss SC15G 104G8525 Compressor 1/2 HP R134a MBP HBP Technical Specifications

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Danfoss SC15G, 104G8525, 1/2 HP Compressor, R134a, Commercial Refrigeration, Secop Germany, Embraco NEK6213Z, Tecumseh AE4456Y, SC15G Replacement.

Excerpt: The Danfoss SC15G (104G8525) is a high-capacity 1/2 HP compressor designed for R134a commercial cooling applications. Featuring a 15.28cc displacement and German engineering, it excels in MBP/HBP environments like display coolers. This professional guide details its 738W cooling capacity, electrical requirements, and provides a comprehensive cross-reference list for field technicians and engineers.

Mbsmpro.com, Compressor, KCJ513HAG-S424H, 1.2 HP, Copeland, R134a, HBP, 12300 Btu/h, 230V, CSCR, Water Cooler, Air Conditioning

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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.

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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

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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!

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Exploitation: Installation & Troubleshooting

For the technician, installing the KCJ513HAG requires attention to detail:

1. 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.
2. 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.
3. 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.
4. 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).

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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.

Slug:

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Tags:

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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.