Mbsmpro.com | ZMC GL45AN Compressor – R134a, 1/8 HP, LBP Cooling & Freezing Applications
Professional Overview
The ZMC GL45AN is a hermetic refrigeration compressor designed for domestic and light commercial refrigeration systems operating with R134a refrigerant. This model belongs to the LBP (Low Back Pressure) category and is widely used in refrigerators, beverage coolers, small freezers, and under-counter cooling equipment.
Engineered for reliability, low noise, and stable thermal performance, the GL45AN is well adapted for continuous duty cycles in temperature ranges typically found in cooling and light freezing systems. Its compact displacement and efficient motor design make it a common replacement compressor in service and maintenance operations.
Technical Identity & Operating Principle
The GL45AN operates using a single-phase RSIR motor system, optimized for energy efficiency and smooth start-up. It is oil-lubricated with mineral oil compatible with R134a, ensuring proper lubrication and long service life.
This compressor is designed to work without an external cooling fan, relying instead on natural air convection around the shell, which simplifies installation and reduces failure points.
Complete Technical Specification Table
| Parameter | Value |
|---|---|
| Model | ZMC GL45AN |
| Utilisation (MBP/HBP/LBP) | LBP |
| Domaine (Freezing / Cooling) | Cooling & Light Freezing |
| Oil Type & Quantity | Mineral Oil – approx. 180 ml |
| Horsepower (HP) | 1/8 HP |
| Refrigerant Type | R134a |
| Power Supply | 220–240V / 50Hz / 1 Phase |
| Cooling Capacity (BTU/h) | ~450–520 BTU/h |
| Motor Type | Single-Phase Induction (RSIR) |
| Displacement | ~4.5 cm³ |
| Winding Material | Copper |
| Pressure Charge | Factory nitrogen holding charge |
| Capillary Tube | 0.031″ – 0.036″ (system dependent) |
| Compatible Refrigerator Models | Single-door fridge, minibar, beverage cooler |
| Temperature Function | −30°C to −10°C evaporating |
| With Fan or No | No fan |
| Commercial Use | Yes (light commercial) |
| Amperage (Running) | 1.1 – 1.4 A |
| LRA (Locked Rotor Amps) | ~6.5 A |
| Relay Type | PTC Relay |
| Capacitor | Not required (RSIR design) |
Electrical Configuration (RSIR System)
The GL45AN uses a Resistance Start Induction Run configuration:
- Start winding activated via PTC relay
- No run capacitor required
- Thermal overload protection integrated
- Designed for stable voltage environments
This configuration reduces component count and improves long-term reliability.
Application Examples
This compressor is suitable for:
- Domestic refrigerators (single door)
- Hotel minibars
- Beverage display coolers
- Small medical refrigerators
- Undercounter cooling units
It is not recommended for:
- Deep freezing below −35°C
- High back pressure systems
- Large commercial freezer cabinets
Performance Comparison (Same Class)
| Model | Refrigerant | HP | Displacement |
|---|---|---|---|
| ZMC GL45AN | R134a | 1/8 | 4.5 cc |
| Secop TLES5.7 | R134a | 1/6 | 5.7 cc |
| Embraco EM2X60 | R134a | 1/6 | 6.0 cc |
| Huayi HYE45 | R134a | 1/8 | 4.5 cc |
The GL45AN offers lower energy consumption compared to higher-displacement compressors, making it ideal where efficiency and compact size are required.
Replacement Compressors – Same Refrigerant (R134a)
- Embraco EM2X45
- Secop TLES4.8
- Huayi HYE45
- Donper GFF45AA
- LG MA45LAEG
Replacement Compressors – Other Refrigerants (With System Modification)
- Embraco EGX70 (R600a)
- Secop TLY5.7 (R600a)
- Huayi HYB45 (R600a)
- Donper GHF50 (R600a)
- LG MA53LAG (R600a)
System oil, capillary, and dryer must be adapted.
Engineering Advice & Best Practices
- Always replace the filter dryer when installing
- Evacuate system to below 500 microns
- Maintain condenser airflow clearance
- Match capillary length precisely
- Avoid overcharging; R134a is sensitive to charge quantity
Key Benefits
- Low vibration & quiet operation
- Proven durability in field use
- Easy replacement compatibility
- Stable cooling under voltage fluctuation
- Widely available service parts
Frequently Asked Question
Can the ZMC GL45AN be used in a freezer?
Yes, it can operate in light freezing applications down to approximately −30°C evaporating temperature, provided the system is correctly sized and ventilated.
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ZMC GL45AN compressor R134a 1/8 HP LBP refrigeration compressor for refrigerator cooling and light freezing applications replacement guide
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ZMC GL45AN Compressor R134a 1/8 HP | Technical Specs & Replacement Guide
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Professional guide to the ZMC GL45AN compressor: R134a, 1/8 HP, LBP refrigeration use, specifications, replacements, applications, and expert installation advice.
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ZMC GL45AN, Compressor R134a, 1/8 HP Compressor, Refrigerator Compressor, Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, GL45AN replacement, Embraco replacement, Secop replacement
Excerpt
The ZMC GL45AN is a hermetic refrigeration compressor designed for R134a systems in cooling and light freezing applications. With a 1/8 HP motor, LBP operation, and RSIR electrical design, it delivers stable performance, low noise, and high reliability for domestic and light commercial refrigeration equipment.
