spera J7238GE Compressor 1.5 HP R407C HBP Technical Specifications and Performance Data
Mbsmpro.com, Compressor, Aspera, J7238GE, 1.5 HP, Embraco, Cooling, R407C, 3800 W, 7.5 A, 1Ph 220-240V 50Hz, HBP, CSR, 0°C to +15°C, Commercial Cooling
Technical Specifications: Aspera J7238GE
| Feature | Specification |
| Model | J7238GE (963HA01) |
| Utilisation | HBP (High Back Pressure) |
| Domaine | Commercial Cooling / Air Conditioning |
| Cooling wattage at +7.2°C | 3,845 W |
| Cubic feet can this compressor cool? | Approx. 180 – 250 cu. ft (Application dependent) |
| Litres can this compressor cool? | Approx. 5,000 – 7,000 Liters |
| Kcal/h | 3,306 Kcal/h |
| TON (Refrigeration) | 1.1 Ton |
| Oil Type and Quantity | POE 22 (Polyolester) / 887 ml |
| Horsepower (HP) | 1.5 HP |
| Refrigerant Type | R407C |
| Power Supply | 220-240V / 50Hz / 1 Phase |
| Cooling Capacity BTU | 13,119 BTU/h |
| Motor Type | CSR (Capacitor Start – Run) |
| Displacement | 32.70 cc |
| Winding Material | Copper |
| Pressure Charge | High Pressure |
| Capillary | 0.070″ to 0.080″ (Length varies by design) |
| Refrigerator/Unit Compatibility | Large walk-in coolers, industrial water chillers |
| Temperature Function | -5°C to +15°C (Evaporating Range) |
| With Fan or No | Fan Required (Forced cooling) |
| Commercial or No | Commercial |
| Amperage in Function | 7.4 A |
| LRA (Locked Rotor Amps) | 38.0 A |
| Type of Relay | Potential Relay |
| Capacitor and Value | Start: 88-108 µF / Run: 20 µF |
| Country of Origin | Slovakia |
Compressor Replacements (Same Refrigerant: R407C)
- Embraco NJ7240E
- Tecumseh CAJ4511Z
- Danfoss MTZ22-4VI (With slight modification)
- Bristol H23A353DBEA
- Copeland ZP31KSE-PFV
Compressor Replacements (Other Refrigerant: R404A/R134a)
- Embraco NJ9238GK (R404A – HBP)
- Tecumseh TAG4546Z (R404A)
- Aspera NJ6226Z (R134a – requires larger displacement)
- Danfoss SC18G (R134a – lower capacity)
- Copeland ZB15KCE-TFD (R404A – Scroll version)
Mastering High-Performance Cooling: The Aspera J7238GE Professional Overview
In the world of commercial refrigeration and industrial climate control, the Aspera J7238GE stands as a testament to Slovakian engineering precision. This 1.5 HP powerhouse is specifically designed for High Back Pressure (HBP) applications, making it a “go-to” choice for engineers managing large-scale walk-in coolers, industrial water chillers, and specialized air conditioning units.
Operating on R407C, an environmentally conscious HFC blend, the J7238GE provides a robust cooling capacity exceeding 13,000 BTU/h. Unlike standard household compressors, this unit utilizes a CSR (Capacitor Start – Run) motor configuration. This ensures high starting torque, allowing the compressor to kick in even under heavy thermal loads without tripping the thermal protection.
For the field worker, the reliability of the Slovakia-made Embraco/Aspera line is legendary. It handles the stresses of fluctuating ambient temperatures with grace, provided the maintenance of the forced-air cooling system is kept in check.
Efficiency Metrics (COP) & Performance Curve
The efficiency of the J7238GE is highly dependent on the evaporating temperature. Below is the performance data for R407C at a standard Condensing Temperature of 45°C.
| Evaporating Temp (°C) | Cooling Capacity (Watts) | Power Consumption (Watts) | COP (W/W) |
| -10 | 1,950 | 1,210 | 1.61 |
| -5 | 2,480 | 1,350 | 1.84 |
| 0 | 3,110 | 1,480 | 2.10 |
| +5 | 3,845 | 1,620 | 2.37 |
| +7.2 | 4,200 | 1,680 | 2.50 |
| +10 | 4,680 | 1,750 | 2.67 |
Engineering Insight: R407C vs. R22 and R404A
When comparing the J7238GE to older R22 models or newer R404A units, several factors emerge:
- Glide: R407C has a significant temperature glide. As an engineer, you must ensure the system is charged in the liquid phase to maintain the correct blend ratio.
- Heat Transfer: R407C offers excellent heat transfer coefficients in HBP ranges, often outperforming R134a in similar physical footprints.
- Displacement: With a 32.7 cc displacement, the J7238GE moves a significant volume of gas, making it far more efficient for medium-to-large commercial cabinets than the standard NJ series used in smaller retail fridges.
Maintenance and Field Advice
- Oil Management: This compressor uses POE oil. It is extremely hygroscopic (absorbs moisture quickly). Never leave the system open to the atmosphere for more than 15 minutes.
- Start Components: Always check the potential relay and capacitors if the compressor hums but fails to start. A weakened 20µF run capacitor is often the silent killer of these motors.
- Vibration: Ensure the mounting grommets are secure. The J7238GE is a heavy-duty reciprocating model; excessive vibration can lead to copper fatigue and subsequent leaks.
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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Aspera, Embraco, J7238GE, 963HA01, R407C, 1.5HP, HBP, Commercial Cooling, NJ7240E, CAJ4511Z, MTZ22, NJ9238GK, Refrigeration Repair, HVAC Engineering.
Excerpt: The Aspera J7238GE is a powerhouse in the commercial cooling sector. Delivering 1.5 HP of performance using R407C refrigerant, this Slovakia-built compressor is designed for High Back Pressure applications. With a 32.7 cc displacement and a robust CSR motor, it provides reliable cooling for large-scale industrial chillers and commercial walk-in refrigeration systems worldwide.
