Compressor BPM1084Z, B1085A, AE8ZA7: A Comprehensive Overview
In the world of refrigeration and air conditioning systems, compressors play a pivotal role in ensuring efficient operation. One such compressor that has gained significant attention for its reliability and performance is the BPM1084Z/B1085A/AE8ZA7 , which is widely used in applications requiring precise temperature control. This article delves into the specifications, features, and applications of this compressor, making it easier to understand why it’s a popular choice for various industries.
Key Specifications
Below is a summary of the key specifications of the BPM1084Z/B1085A/AE8ZA7 compressor:
Parameter
Value
Model Numbers
BPM1084Z, B1085A, AE8ZA7
Horsepower (HP)
1/8 HP
Refrigerant Type
R134a
Power Consumption
102W
Displacement
4.15 cc
Application
Freezing Systems
Design
Rotary Compressor with RSIR Configuration
1. Model Identification
The BPM1084Z, B1085A, and AE8ZA7 are essentially different model numbers for the same compressor, often used interchangeably depending on the manufacturer or supplier. These models belong to the rotary compressor family, known for their compact design and high efficiency.
2. Refrigerant Compatibility
This compressor is designed to work with R134a , a widely-used refrigerant renowned for its environmental friendliness compared to older alternatives like R12. R134a is non-flammable, ozone-friendly, and suitable for low-temperature applications such as freezing systems.
3. Power and Efficiency
With a nominal power consumption of 102 watts and a displacement of 4.15 cubic centimeters , this compressor strikes an excellent balance between energy efficiency and cooling capacity. Its 1/8 HP rating makes it ideal for small-scale applications where space and power usage are critical considerations.
4. RSIR Design
The “RSIR” designation refers to the internal configuration of the compressor. It stands for Rotary Scroll Internal Reversing , indicating that the compressor uses a rotary mechanism combined with scroll technology for smooth and quiet operation. The internal reversing feature enhances versatility by allowing the compressor to handle both cooling and heating cycles when paired with appropriate systems.
Applications
The BPM1084Z/B1085A/AE8ZA7 compressor is particularly well-suited for applications involving freezing systems due to its ability to maintain consistent temperatures at lower levels. Some common use cases include:
Commercial Refrigeration: Used in small walk-in coolers, beverage chillers, and display cases.
Home Appliances: Integrated into compact freezers, wine coolers, and mini-split air conditioners.
Automotive Air Conditioning: Suitable for smaller vehicles or auxiliary cooling systems.
Laboratory Equipment: Employed in precision cooling systems for sensitive instruments and samples.
Advantages
Compact Size: The compressor’s small footprint makes it easy to install in confined spaces without compromising performance.
Low Noise Levels: Thanks to its rotary-scroll design, the BPM1084Z operates quietly, making it suitable for environments where noise reduction is essential.
Energy Efficiency: With only 102 watts of power consumption, it offers significant savings over time while maintaining effective cooling.
Reliability: Built with robust materials and advanced engineering, this compressor ensures long-term durability and minimal maintenance requirements.
Compatibility: Designed to work seamlessly with R134a refrigerant, it aligns with modern standards for environmentally safe systems.
Maintenance Tips
To ensure optimal performance and longevity of the BPM1084Z/B1085A/AE8ZA7 compressor, consider the following maintenance practices:
Regular Cleaning: Keep the compressor clean and free from dust or debris to prevent overheating.
Oil Checks: Ensure the compressor is adequately lubricated using the recommended oil type specified by the manufacturer.
System Inspections: Periodically inspect the refrigerant charge and piping for leaks or blockages.
Operational Monitoring: Monitor the system’s pressure and temperature readings to detect potential issues early.
Conclusion
The BPM1084Z/B1085A/AE8ZA7 compressor exemplifies the perfect blend of efficiency, reliability, and adaptability. Whether you’re looking to equip a commercial freezer, a home appliance, or specialized laboratory equipment, this compressor delivers dependable performance tailored to meet your needs. By understanding its specifications and adhering to proper maintenance guidelines, users can maximize its lifespan and enjoy consistent results across various applications.
To better understand the codes, we can group them by their prefixes:
D-Series
These are likely standard Panasonic compressors:
D51C10RAW5
D51C90RAW5
D57C10RAW5
D57C13RAX5
D66C13RAW5
D66C13RAX5
D77C15RAW5
D77C18RAX5
D91C18RAW5
D91C21RAX5
D110C21RAX5
D110C21RAZ5
D110C21RBX5
D110C24GAX5
DA-Series
These may represent advanced or upgraded versions:
DA57C11RAY5
DA66C12RAY5
DA77C15RAY5
DB-Series
These could be specialized or commercial-grade compressors:
DB66C10RAW5
DB66C12RAY5
DB66C14RBX5
DB73C13RAY5
DB77C14RAY5
DB77C16RBX5
DB86C16RAY5
DB91C14RAW5
DB91C19RAY5
DB91C21RAX5
DB110C19RAW5
DB110C22RAW5
DD-Series
Possibly high-efficiency or dual-stage compressors:
DD57C10RAW5
DD57C12GAX5
DD66C13RAW5
DD66C14GAX5
DD77C15GAX5
DD77C15RAW5
DD86C18RAW5
DG-Series
May represent gas-cooled or hermetic compressors:
DG51C89RAW5
DGH51C90RAX
DG57C90GCW5
DG57C96RAW5
DG66C11RAW5
DG66C13GAX5
DG73C12RAW5
DG77C14RAW5
DG77C16GAX5
DG91C18RAW5
DG91C21RAX5
QA-Series
Could be for air conditioning or heat pump applications:
QA66C12GAX5
QA66C14GAX5
QA66C15GAX5
QA77C17GAX5
QA91C22GAX5
QB-Series
Likely for higher-capacity or industrial use:
QB51C74GAW5
QB51C95GPW5
QB51C99GAW0
QB51C99GAX0
QB51C99GLX5
QB57C11GAX0
QB57C11GLX5
QB57C11GPX5
QB57C86GAX0
QB57C87GAW5
QB66C13GAX5
QB66C13GLX5
QB66C13GPX5
QB66C16GAX0
QB66C97GAW5
QB73C12GAW5
QB73C15GAX5
QB73C16GAX5
QB77C13GAW5
QB77C16GAX5
QB77C16GLX5
QB77C16GPX5
QB77C18GAX0
QB86C13GAW5
QB86C18GAX5
QB91C16GAW5
QB91C18GAX0
QB91C19GAX5
QB91C21RPX5
QB91C24GAX0
QB110C19GAW5
QB110C25CAX0
QB110C25GAX5
MGA-Series
May represent modular or customizable compressors:
MGA57C95RPX
MGA66C11RPX
MGA73C15RPX
MGA77C16RLX
SB-Series
Could be scroll-type or semi-hermetic compressors:
SB24C50GAW5
SB30C50GAW5
SB35C65GAW5
SB35C67RAY5
SB43C80GAW5
SB43C90RAY5
SB48C10RAY5
SB48C12GAX5
SB48C95GAW5
SF-Series
Possibly for fractional horsepower or small-scale applications:
SF39C74RAX5
SF39C78GAX5
SF43C76RAX5
SF43C83RAW5
SF48C10RAX5
SF48C91RAW5
SF51C10RAX5
SF51C91RAW5
Other Codes
Some codes have unique prefixes like QBH, DHS, DKK, etc., which may correspond to specialized or regional product lines.
Panasonic compressors are widely recognized for their reliability, efficiency, and durability. They are commonly used in a variety of applications, including air conditioning systems, refrigeration units, heat pumps, and more. Below is an overview of Panasonic compressors, their types, features, and how they are classified.
1. Types of Panasonic Compressors
a. Rotary Compressors
Description : These compressors use a rotating mechanism to compress refrigerant gas. They are known for their compact size, low noise, and high efficiency.
Applications : Ideal for small to medium-sized air conditioners, refrigerators, and freezers.
Examples :
D51C10RAW5
DB66C10RAW5
b. Scroll Compressors
Description : Scroll compressors use two spiral-shaped scrolls to compress refrigerant. They are highly efficient and quiet, making them suitable for residential and commercial HVAC systems.
Applications : Used in air conditioners, heat pumps, and large refrigeration systems.
Examples :
SB24C50GAW5
SB35C65GAW5
c. Reciprocating Compressors
Description : These compressors use pistons to compress refrigerant. They are robust and reliable but generally less efficient than rotary or scroll compressors.
Applications : Commonly used in industrial refrigeration systems.
Examples :
DGH51C90RAX
DG57C90GCW5
d. Variable-Speed Compressors
Description : These compressors can adjust their speed based on the cooling or heating demand, improving energy efficiency and comfort.
Applications : Suitable for advanced air conditioning and heat pump systems.
Examples :
QB77C16GAX5
QB91C21RPX5
e. Hermetic Compressors
Description : Hermetically sealed compressors are fully enclosed to prevent leaks and contamination. They are maintenance-free and highly reliable.
Applications : Used in household appliances like refrigerators and freezers.
Examples :
QA66C12GAX5
QA91C22GAX5
2. Features of Panasonic Compressors
a. High Efficiency
Panasonic compressors are designed to minimize energy consumption while maintaining optimal performance. Many models meet or exceed global energy efficiency standards.
b. Durability
Built with high-quality materials and advanced engineering, Panasonic compressors are built to last. They undergo rigorous testing to ensure reliability under various operating conditions.
c. Low Noise
Panasonic uses advanced technologies to reduce noise levels, making their compressors ideal for residential and commercial environments where quiet operation is essential.
d. Compatibility
Panasonic compressors are compatible with a wide range of refrigerants, including eco-friendly options like R32 and R410A.
e. Smart Control
Many Panasonic compressors come with built-in sensors and control systems that optimize performance based on real-time conditions.
3. Code Breakdown for Panasonic Compressors
The alphanumeric codes used by Panasonic provide detailed information about each compressor. Here’s how they can be interpreted:
General Structure
Prefix : Indicates the series or type of compressor (e.g., D, DB, DG, QA, QB).
Number Segment 1 (XX) : Represents the capacity or size of the compressor.
Separator (C) : A delimiter separating different parts of the code.
Number Segment 2 (YY) : Specifies the version, design, or feature level.
Suffix (ZZZ) : Describes the configuration, application, or technology.
Examples
D51C10RAW5:
Prefix: D (Standard compressor)
Capacity: 51 (indicative of size or power)
Separator: C
Version: 10
Suffix: RAW5 (Air-cooled, standard model)
QB77C16GAX5:
Prefix: QB (High-performance compressor)
Capacity: 77
Separator: C
Version: 16
Suffix: GAX5 (Gas-cooled, enhanced efficiency)
4. Applications of Panasonic Compressors
a. Air Conditioning Systems
Panasonic compressors are widely used in both split-type and central air conditioning systems. Their variable-speed and inverter technologies ensure precise temperature control and energy savings.
b. Refrigeration Units
From small household refrigerators to large commercial chillers, Panasonic compressors offer reliable performance across a wide range of applications.
c. Heat Pumps
Panasonic compressors are integral components of heat pump systems, providing efficient heating and cooling in a single unit.
d. Industrial Applications
In industrial settings, Panasonic compressors are used for process cooling, cold storage, and other demanding applications.
5. Popular Models
Here are some popular Panasonic compressor models and their typical applications:
Model
Type
Application
D51C10RAW5
Rotary
Small air conditioners
DB66C10RAW5
Rotary
Medium-sized air conditioners
SB24C50GAW5
Scroll
Residential air conditioners
QA66C12GAX5
Hermetic
Refrigerators and freezers
QB77C16GAX5
Variable-Speed
Advanced air conditioning systems
DG57C90GCW5
Reciprocating
Industrial refrigeration systems
6. Advantages of Panasonic Compressors
Energy Efficiency : Panasonic compressors are designed to reduce electricity consumption without compromising performance.
Quiet Operation : Advanced noise reduction technologies make Panasonic compressors ideal for residential and office environments.
Reliability : Built to withstand harsh conditions, Panasonic compressors offer long service life with minimal maintenance.
Eco-Friendly : Many Panasonic compressors use environmentally friendly refrigerants, contributing to sustainability.
7. Conclusion
Panasonic compressors are trusted globally for their exceptional performance, efficiency, and reliability. Whether you’re looking for a compact rotary compressor for a home refrigerator or a high-capacity scroll compressor for a commercial HVAC system, Panasonic offers a wide range of solutions tailored to your needs.
Mbsm.pro, Compressor, Embraco, Aspera, EMT43HLP, EMY3111Z, LBP-R134a, R507, 220-240V/1/50Hz, 1/8and HP, displacement 4.85 cm3, motor type RSIR
Do you need to replace a start or run capacitor and you don’t know which one the equipment has? In this post we will give you some tables of start and run capacitors so that you can access it when you need it.
The topic regarding the calculation of capacitors for single-phase compressors is of great importance, because whoever is repairing needs to know when it is in poor condition and also what the replacement of the damaged part will be.
The technician who manipulates the equipment has to know that the new capacitor that he has bought to replace the old one must exactly meet the working voltage or greater than that of the original.
It is also important to highlight in this article that the compressor voltage has almost no relation to the capacitor voltage.
If you do not have the original capacitor data, you can approximate it using the following capacitor values for single-phase motors that we present below.
They can be used as a guide or reference for selecting, replacing capacitors when the exact values are unknown.
Table of starting capacitors for single-phase motors
Table of Start and Run Capacitors for Single Phase Capacitors
In this table, which is very similar to the previous one, I attach capacitor values for single-phase motors.
both working and starting capacitors, this way you will have the most user-friendly information in a single image
Capacitor Table for Three-Phase Electric Motors
As a general rule, low-power three-phase electric motors have an operating voltage of 220 VD / 380 VY, but we must always make sure .
To do this, it is best to look at the motor’s nameplate. Where the voltages and connection will be indicated to know the type of Capacitor they use.
Fan run capacitor table
If you need to change a running or permanent fan capacitor, this table attached below can guide you to resolve the fault of the equipment you are repairing:
Understanding Starting Capacitors for Compressors: A Comprehensive Guide
Introduction Starting capacitors play a crucial role in the efficient operation of compressors, especially in single-phase motors. They help generate the necessary starting torque and ensure smooth operation. This guide provides a detailed overview of starting capacitors, their importance, and how to select the right one for your compressor. We’ll also explore key specifications and troubleshooting tips to ensure optimal performance.
1. What is a Starting Capacitor?
A starting capacitor is an electrical component used in single-phase motors to create a phase shift, which generates the torque needed to start the motor. Without a starting capacitor, single-phase motors would struggle to start due to insufficient torque.
2. Key Functions of Starting Capacitors
Generate Starting Torque: Provides the necessary torque to start the compressor motor.
Phase Shift Creation: Creates a 90-degree phase shift to simulate a second phase in single-phase motors.
Smooth Operation: Ensures the motor starts smoothly without excessive current draw.
3. Table: Starting Capacitor Specifications for Compressors
Compressor Model
Power (W)
Voltage (V)
Capacitance (µF)
Max. Current (A)
Release Current (A)
BSA15
150
230
10
1.55
1.6
BSA10
250
230
15
2.43
2.07
B10A19
300
230
20
3.0
2.56
B12A12
350
230
25
3.5
2.95
B16A13
500
230
30
5.15
4.85
B9A11
750
230
35
7.0
5.9
4. How to Calculate the Right Capacitor for Your Compressor
The capacitance of a starting capacitor is critical for optimal performance. Here’s a simple formula to calculate the required capacitance:
Formula:
C=P×1062πfV2cos(ϕ)C=2πfV2cos(ϕ)P×106
Where:
CC = Capacitance (in microfarads, µF)
PP = Motor power (in watts, W)
ff = Frequency (in hertz, Hz, typically 50 or 60 Hz)
VV = Voltage (in volts, V)
cos(ϕ)cos(ϕ) = Power factor (typically 0.85 for motors)
Failed Capacitor: A faulty capacitor can prevent the motor from starting or cause it to overheat.
Incorrect Capacitance: Using a capacitor with the wrong capacitance can lead to insufficient torque or excessive current draw.
Overheating: Poor ventilation or excessive load can cause the capacitor to overheat and fail.
6. Troubleshooting Tips
Check Continuity: Use a multimeter to test the capacitor for continuity. A failed capacitor will show no continuity.
Measure Capacitance: Use a capacitance meter to ensure the capacitor’s value matches the required specifications.
Inspect for Physical Damage: Look for bulging, leaks, or burn marks on the capacitor, which indicate failure.
Test Under Load: Ensure the compressor starts smoothly and does not draw excessive current during startup.
7. Advantages of Using the Right Starting Capacitor
Improved Motor Lifespan: Reduces stress on the motor during startup.
Energy Efficiency: Minimizes power consumption during operation.
Reliable Performance: Ensures consistent and reliable compressor operation.
8. Conclusion
Selecting the right starting capacitor for your compressor is essential for ensuring efficient and reliable operation. By understanding the specifications, calculating the correct capacitance, and performing regular maintenance, you can extend the lifespan of your compressor and avoid costly repairs.
Mbsm.pro, Understanding, Motor, Starting , Systems, for, Compressor
Category: Chaud&Froid
written by www.mbsm.pro | 1 February 2025
Introduction Motor starting systems are critical in ensuring the efficient and safe operation of electric motors across various industries. Choosing the right starting method can significantly impact performance, energy consumption, and equipment longevity. In this post, we’ll explore the most common motor starting systems, their characteristics, advantages, and disadvantages to help you make informed decisions for your applications.
1. Direct-On-Line (DOL) Starting
Characteristics:
Starting current: 5 to 8 times the rated current.
Starting torque: 0.5 to 1.5 times the rated torque.
Direct connection of the stator to the power supply.
Advantages:
Simple and cost-effective.
No additional devices required.
Disadvantages:
High starting current may cause voltage drops in the network.
Not recommended for high-power motors.
2. Star-Delta Starting
Characteristics:
Starting current: 1.5 to 2.6 times the rated current.
Reduced voltage in star mode (3 times lower).
Requires a motor with compatible windings.
Advantages:
Reduces starting current.
Suitable for machines with low resistive torque or no-load starting.
Disadvantages:
Requires a specific motor type.
Not effective for heavy loads.
3. Part-Winding Starting
Characteristics:
Starting current: Approximately half of DOL starting.
Starting torque: Higher than star-delta.
Uses two parallel windings.
Advantages:
Lower starting current.
Higher starting torque compared to star-delta.
Disadvantages:
Rarely used in Europe.
Requires a motor with specific windings.
4. Stator Resistance Starting
Characteristics:
Starting current: 4.5 times the rated current.
Starting torque: 0.75 times the rated torque.
Resistors in series with the windings.
Advantages:
Reduces starting current.
No winding modification required.
Disadvantages:
Energy losses in resistors.
Requires a timer to remove resistors.
5. Autotransformer Starting
Characteristics:
Reduced voltage during starting.
Three stages: star, partial coupling, and full voltage.
Selectable transformation ratio.
Advantages:
Reduces starting current.
Flexible voltage selection.
Disadvantages:
Expensive and complex.
Requires additional space for the autotransformer.
6. Electronic Soft Starter
Characteristics:
Limits current and adjusts torque.
Smooth start and stop.
Electronic control of applied voltage.
Advantages:
Smooth starting reduces mechanical stress.
Energy savings.
Disadvantages:
Higher initial cost.
Requires maintenance of the electronic system.
7. Variable Frequency Drive (VFD) Starting
Characteristics:
Speed and torque control.
Suitable for high-inertia loads.
Optimizes energy consumption.
Advantages:
Precise speed control.
Ideal for applications requiring variable speed.
Disadvantages:
High initial cost.
Requires technical expertise for setup and maintenance.
Conclusion
Selecting the right motor starting system depends on factors such as motor size, load type, and operational requirements. While DOL starting is simple and cost-effective, more advanced systems like soft starters and VFDs offer greater control and efficiency, albeit at a higher cost. Understanding these systems will help you optimize performance, reduce energy consumption, and extend the lifespan of your equipment.
If you have any questions or need further assistance in choosing the right motor starting system for your application, feel free to leave a comment or contact us!
Tags: Motor Starting Systems, Electric Motors, Soft Starters, VFD, Star-Delta Starting, Industrial Automation Categories: Electrical Engineering, Industrial Automation, Energy Efficiency
table organizes the information for better readability and understanding:
Content Table: Motor Starting Systems and Protection Specifications
1. General Specifications
Model
Concesor Current (A)
Relaxo Current (A)
Overload Current (A)
Applied Temperature (°C)
Concesor Temperature (°C)
1171/2010
2
1.6
4
–
–
1171/2030
3
2.6
5
105 ± 10
60 ± 10
1171/2040
4
3.6
6.5
–
–
1171/2050
4.6
4.2
6.5
–
–
2. Compressor Power Specifications (HF)
Component Power (HF)
Compressor Power Model
Max. Connection Current (A)
Minimum Release Current (A)
1/12
BSA15
1.55
1.6
1/8
BSA10
2.43
2.07
1/6
B10A19
3
2.56
1/5
B12A12
3.5
2.95
1/4
B16A13
5.15
4.85
1/3
B9A11
7
5.9
3. Compressor Power and Current Ratings
Component Power (HF)
Compressor Power (W)
Max. Connection Current (A)
Release Current (A)
1/12
61
2
1.6
1/10
74
2.5
2
1/8
93
3
2.6
1/7
105
3.3
2.8
1/6
125
3.6
3
1/5
150
4.75
3.35
1/4
180
5.35
4.25
1/3
245
6
4.75
1/2
370
7.5
6
4. IRFA Series Specifications
Model
Compressor Power (W)
Max. Connection Current (A)
Release Current (A)
IRFA-20
450W (20HF)
14
–
IRFA-10
750W (1HF)
16
–
IRFA-13
975W (1HF)
20
–
IRFA-15
1100W (2HF)
24
–
IRFA-20
1500W (2HF)
30
–
5. Additional Notes
Concesor Current: The current drawn by the compressor during operation.
Relaxo Current: The current at which the system releases or disconnects.
Overload Current: The maximum current the system can handle before tripping.
Applied Temperature: The operating temperature range for the system.
Concesor Temperature: The temperature range for the compressor during operation.
This table provides a clear and organized overview of the motor starting and protection systems, including their specifications and performance metrics. Let me know if you need further assistance!
Sistemas de arranque:
En el caso del relé de arranque, cuando la energía es aplicada al compresor, la bobina solenoide del relé atrae la armadura del mismo para arriba produciendo el cierre de los contactos, energizando la bobina de arranque del motor. Cuando el motor del compresor alcanza la velocidad de funcionamiento, la corriente de la bobina principal del motor será tal que la bobina solenoide del relé desenergiza permitiendo que los contactos del relé se abran, desconectando de esta manera la bobina de arranque del motor.
The PTC is a semiconductor with a positive temperature coefficient, which means that it offers no resistance to the passage of current when the unit is cold. When the unit is turned on, the current passing through the PTC causes it to heat up rapidly, creating such a high resistance in its circuit that the passage of current remains at a very low value but high enough to keep the PTC warm.
Prerequisites for using the PTC system:
– The thermostat must be used to ensure that the stop time allows for pressure equalisation in the system. – Depending on the size of the compressor, the stop period should be at least 3 to 5 minutes (e.g. the minimum times for TL are 3 minutes, and for SC 5 minutes).
The PTC system offers a number of advantages:
– Improved protection of the starter coil – PTC is not affected by voltage increases or decreases – Free from radio and television interference – No wear – Identical PTC starter system for many compressors of different sizes.
LST (low starting torque) engines
Compressors with RSIR and RSCR system motors have a low starting torque (LST) and are used in refrigeration appliances with capillary tubes, where pressure equalization takes place before each start.
The RSIR system incorporates a PTC thermistor or a relay and a bifilar winding (current relay) as starting equipment. The PTC needs to be kept off for a period of about 5 minutes to allow it to cool down before it can restart.
RSCR (Resistant Start Capacitor Run): Induction motor with resistor start and run capacitor.
The RSCR system, consisting of a PTC thermistor and a run capacitor, is mainly used in energy-optimized compressors.
HST (High Starting Torque) Engines
Compressors with CSIR and CSR type motors have a high starting torque (HST) and can be used in refrigeration appliances with capillary tubes as well as in systems with expansion valve operation (without pressure equalization).
– CSR (Capacitor Start Run): Induction motor with start capacitor and run capacitor
CRS systems require a voltage relay, a start capacitor and a run capacitor.
– CSIR (Capacitor Start Induction Run): Induction motor with starting capacitor.
The CSIR system consists of the starting relay and starting capacitor specified for each particular compressor type.
Graphic summary:
Conditions for a long service life
To achieve trouble-free operation and long service life of the hermetic compressor, the following conditions must be met:
1. The starting torque must be sufficient to enable the motor to start under the prevailing pressure conditions in the system. 2. The maximum torque of the motor must be sufficient to enable the motor to withstand the load conditions at start-up and during running. 3. During operation of the refrigeration system, the temperature of the compressor must never rise to levels that could damage its components. Condensation and compression temperatures must therefore be kept as low as possible. 4. Correct sizing of the refrigeration system in question, and a correct assessment of the operating conditions of the compressor under maximum loads. 5. Sufficient cleanliness and minimum residual moisture in the system.
Engine overload
The motor start-up is determined by the starting torque and/or the maximum torque of the motor. If the starting torque or the maximum torque are insufficient, the compressor cannot start or the start-up will be hindered and delayed due to the activation of the internal motor protector.
Repeated starting attempts subject the motor to overload, which will sooner or later result in failure. It is all a matter of selecting the right compressor for extreme working conditions.
Thermal overload
To ensure a long compressor life, operating conditions that lead to thermal decomposition of the materials used in the compressor must be avoided. The materials involved are coolant, oil and materials for motor insulation. Motor insulation consists of enamel for the copper winding, insulation for the stator core slot, insulating tape and power cables.
The R 134a, R 404A or R 507 refrigerants used today require advanced oils. Only special quality POE oils (polyester) are used.
For the application of compressors in domestic and commercial refrigeration devices with the refrigerants that are currently available, it is advisable to comply with the following rules.
Coil temperature
The coil temperature must never exceed 125°C during continuous operation. For limited periods of time, e.g. during compressor start-up or in case of short load peaks, the temperature should not exceed 135°C.
For commercial refrigeration with R 134a, the same values apply as for domestic refrigeration. However, cooling the compressor by means of a fan is recommended.
Condensation temperature
When using R 600a or R 134a refrigerants, the condensation temperature during continuous operation must not exceed 60°C. During short load peaks, the temperature must not exceed 70°C.
In commercial refrigeration where R 404A and R 507 refrigerants are used, the condensation temperature limit is 48°C during continuous operation and 58°C during peak loads.
Checking the compressor coils.
We must take into account that we are going to check an electromechanical part since it has an electrical part that makes another mechanical part work and it is necessary to carry out several types of tests to be able to determine if it is damaged and if it is possible to find out which part of the compressor is damaged. For these tests we will need measuring tools and a little expertise since in some we will use the senses, we will divide the tests into two parts, one when it is installed and the other when the compressor is alone without being installed.
Measure continuity between the compressor coils:
For this test we will need a tester that measures continuity, we will have to disconnect the compressor cables, the test consists of verifying that there is continuity between the compressor terminals and measuring two by two we verify if there is no continuity in these terminals, we must take into account the temperature of the compressor, if it is cold the coil is open (damaged), if the compressor is hot we must wait for it to cool down because it may be that the thermal switch is open due to high temperature and we perform the test again.
If you are disconnected or off the computer, this test is performed in the same way.
Test if the amperage is too high:
For this test we will need a clamp meter and we will place it in one of the compressor lines, either the common one, preferably the start (maintenance) line, it should not be placed on the start-up line because it will not give us the measurement we need to check, we must know the normal working amperage of the compressor, start it, wait for it to stabilize, at start-up it normally consumes 5 times the working amperage, we wait for it to stabilize and if it is above that indicated on the plate it is too high in amperage, in this case we will have to check, capacitor, ventilation, pressures, voltage tension, to determine if it is because of the compressor or an external cause. If the compressor is disconnected from the equipment and the amperage exceeds that indicated it is a sign that it is damaged and we should not install it.
Determine if compressor pumps well:
Pressure test: it is not advisable to measure the output pressure, however there are technicians who when buying a used compressor usually measure the high pressure, if it exceeds 300 psi the compressor is fine and if when turning it off the pressure is maintained without it returning, it is an excellent sign that everything is fine, it is not low on compression since the valves do not return pressure, this test is not performed on rotary compressors because they work with the pressure and temperature of the same compressor to reach the normal working refrigerant gas pressure.
If the compressor is installed when measuring with the pressure gauge and registering that the high pressure does not rise and the low pressure is very high, it is a sign of decompression. If it is a rotary equipment, we look at the suction filter that is located at the compressor inlet to see if it freezes. If it is frozen it is due to obstruction. If, upon observing this, everything is normal, it is most likely that the pressures are destabilized due to low compression. Another sign is that the amperage with the low pressure high and the high pressure low will show a consumption well below normal since it is not exerting force to maintain a high pressure in the condenser.
Determine if the compressor is seized:
For this we need to use the ammeter or clamp meter when trying to start the having a suitable capacitor and in good condition it should not exceed the starting amperage which is 5 times the nominal or working amperage, if it exceeds it is a sign that it is blocked, we can use an additional starting aid to the capacitor and if with this the result is the same (taking into account that the voltage is normal) we will determine that the compressor is seized and it is necessary to replace it.
When I mention at the beginning that we should use our senses, I mean that if we are testing a compressor and we notice a strange noise when starting it, this is not a good sign, and if it is already in full operation and sounds unusual, it is a bad sign, as well as looking at the part where the cables are connected to the compressor, since this is a seal that sometimes gets damaged and allows oil to leak, be attentive and verify that the filter that is fixed by a belt in the case of rotary compressors is not subject to this belt being damaged, since it also produces noise, refrigerant gas leaks and vibrations, these are details that we should be very attentive to.
Note: We should always try to exhaust every last resource to determine if a compressor is damaged, because if we are technicians and they seek a second opinion, and it works in the hands of the second opinion, the client will think the worst of us and our reputation will be in jeopardy, and if the compressor is our property, we should also exhaust all resources, since it is the most expensive part of our air conditioning, both its individual price and the expenses generated in labor and materials for its installation. We must be very clear that it no longer works for ourselves and for others.
Checking the starting capacitor.
To test a starting capacitor in a simple way, we simply connect it in series with an incandescent light bulb and supply it with AC voltage. We will also complement the assembly with a normally open push button like the one used in doorbells, which we will connect in parallel with the capacitor according to the following diagram.
Calculation of the starting capacitor capacity:
Many refrigeration compressors are single-phase motors. The problem with supplying a motor with 230 V, with a single phase, means that the torque needed for starting is not generated. To “trick” the motor and generate a fictitious phase, a capacitor is used that shifts the supply voltage by 90º. In this way, we will have the necessary starting torque. To obtain the best and most powerful starting torque of the single-phase motor, which will result in the refrigeration compressor working better and with more force and not jamming… the capacity of the capacitor that obtains this 90º phase shift must be calculated.
It is not true that the larger the capacitor, the greater the starting torque of the single-phase motor. The only thing that is obtained is a greater phase shift, which will produce a lower starting torque of the single-phase motor. In fact, if the capacitor is too large, it may happen that the phase shift is 360º, that is, 0º, so that the single-phase motor would have no starting torque. In any case, capacitors with a higher or lower capacity than necessary will generate phase shifts lower or higher than the optimum, which will result in starting torque values lower than the optimum. Starting with starting torque lower than the optimum can result in our single-phase motor burning out; it has to make more effort than necessary to start, the intensity increases and the motor burns out, which would end up being damaged.
The highest starting torque for the single-phase motor is obtained when the phase shift we obtain with our capacitor is 90º. To obtain this phase shift we will proceed to calculate the capacitor of a single-phase motor in the following way.
Suppose we have an engine with the following characteristics
Power 150 W Working voltage 230 V. Frequency 50 Hz. Cosine of phi = 0.85
Applying the formula, the capacitance is 10.61 microfarads.
Therefore, the optimal ideal capacitor for the single-phase motor in the example is 10.61 uF, as 10.61 micro Farads is a capacitor value that we cannot find on the market, we will choose to buy the value that is closest in this case 10 micro Farads.
Refrigerant Type: R134a (a common refrigerant used in cooling systems)
Application: Refrigerator/Freezer
Volume/Capacity: 598 liters (L)
Weight: 180 grams (g)
Type: LBP (Low Back Pressure, typically used for refrigeration applications)
This compressor is likely designed for use in a refrigerator or freezer unit, with a cooling capacity suitable for a 598-liter appliance. The refrigerant used is R134a, which is common in domestic refrigeration systems. If you’re looking for a replacement part or technical specifications, ensure the model numbers (LC95LAEH, GR-P227KGJ) match your appliance.
Danfoss Relay Connection Diagram for the Electric Compressor in Refrigeration Systems
Below is a detailed explanation of the components and connection diagram of the Danfoss relay for the electric compressor used in refrigeration systems:
1. Components of the Diagram
Compressor:
The compressor is the heart of the refrigeration system, responsible for compressing the refrigerant (freon) and circulating it through the system.
Relay:
The relay is used to provide additional electrical current to the start terminal (S) of the compressor, helping it start smoothly.
Capacitor:
The capacitor improves the compressor’s torque during startup, reducing the load on the electric motor.
Electrical Circuit Diagram:
The diagram shows how the compressor terminals (C, S, R) are connected to the relay, capacitor, and power source.
2. Compressor Terminal Connections
C (Common):
The common terminal connected to both the run and start windings.
R (Run):
The terminal responsible for continuous operation of the compressor after startup.
S (Start):
The terminal responsible for starting the compressor with the help of the relay and capacitor.
3. Steps to Connect the Relay to the Compressor
A. Connecting the Capacitor:
The capacitor is connected between the S (Start) terminal and the R (Run) terminal to support startup torque.
B. Connecting the Relay:
Terminals 10 and 11:
Connected to the power source and the run resistor.
Terminals 12 and 13:
Connected to the compressor terminals: S (Start) and C (Common).
C. Power Supply:
The circuit is powered by a 110V or 220V source (depending on the system used).
4. How the Relay Works
When power is connected, the relay sends additional current to the start terminal (S) via the capacitor.
Once the compressor starts running, the relay automatically cuts off the current to the start terminal.
The compressor continues to operate through the current flowing to the run terminal (R).
5. Importance of Correct Relay Connection
Compressor Protection:
Ensures safe compressor operation during startup.
Energy Saving:
The relay cuts off the startup current after operation to avoid overload.
Performance Improvement:
Helps stabilize compressor operation.
6. Verification Steps After Connection
A. Checking Terminal Connections (C, R, S):
Use a resistance meter (ohmmeter) to verify correct terminal connections.
B. Testing the Relay:
Ensure the relay sends startup current when powered.
C. Testing the Capacitor:
Measure the capacitor’s capacitance (microfarads) using a capacitor tester.
D. Running the Compressor:
Start the system and check for stable compressor operation.
Listen for noise: If it is loud, there may be a connection error.
7. Common Faults and Solutions
A. Compressor Fails to Start:
Cause: Faulty relay or capacitor.
Solution: Test the relay and capacitor and replace them if necessary.
B. Compressor Runs Briefly and Stops:
Cause: High current or excessive load.
Solution: Ensure the external capacitor is clean and there is proper airflow around the unit.
C. Incorrect Connection:
Cause: Swapped terminals (C, R, S).
Solution: Use a resistance meter to accurately identify the terminals.
8. Important Tip
Ensure:
Terminals are connected correctly according to the diagram.
Use a capacitor that matches the compressor’s specifications.
Test the relay before installation to ensure no internal damage.
Conclusion
Correctly connecting the Danfoss relay is crucial for ensuring safe and efficient compressor operation in refrigeration systems. Follow the diagram carefully and perform the necessary tests to avoid malfunctions and improve system performance.
The GMCC PZ80E1F and its related models are mini refrigeration compressors widely used in various cooling applications. Here’s a summary of the specifications and features for the PZ80E1F along with its comparable models:
GMCC PZ80E1F Specifications
Model: PZ80E1F
Horsepower: 1/5 HP
Cooling Capacity: Approximately 137W to 147W
Refrigerant: R600a, suitable for low back pressure (LBP) applications.
Voltage/Frequency: 220V-240V / 50Hz.
Displacement: 8.0 cm³/rev.
Weight: Approximately 7 kg.
Related Models
GMCC PZ80E1D
Similar specifications to the PZ80E1F, often used in similar applications.
GMCC PZ80E1C
Also shares comparable features, focusing on energy efficiency and compact size.
GMCC PZ80E1A
Designed for low power consumption with a similar cooling capacity and refrigerant type.
GMCC PZ80E1Z
Another variant that maintains similar performance metrics.
GMCC PZ80H1Z and PZ80H1Y
These models may offer different horsepower ratings or slight variations in cooling capacity but are generally aligned with the specifications of the E1 series.
Summary Table
Model
Horsepower
Cooling Capacity
Refrigerant
Voltage/Frequency
PZ80E1F
1/5 HP
137W – 147W
R600a
220V/50Hz
PZ80E1D
Similar
Similar
R600a
220V/50Hz
PZ80E1C
Similar
Similar
R600a
220V/50Hz
PZ80E1A
Similar
Similar
R600a
220V/50Hz
PZ80E1Z
Similar
Similar
R600a
220V/50Hz
PZ80H1Z
Similar
Similar
R600a
220V/50Hz
PZ80H1Y
Similar
Similar
R600a
220V/50Hz
These compressors are highly efficient and suitable for various refrigeration systems, particularly in domestic and light commercial applications.
