The Samsung SD162H‑L4UA S01 is a hermetic reciprocating compressor designed for small household refrigerators using R134a refrigerant, with dual‑voltage operation at 200‑220V 50Hz and 220V 60Hz. It belongs to the SD162 family widely used in under‑counter and reach‑in cabinets where high efficiency, reliable starting, and low noise are required.
Electrical and identification data
This section summarizes the key electrical characteristics typically associated with the SD162H series working with R134a in low back pressure applications.
Parameter
Samsung SD162H‑L4UA S01
Notes
Manufacturer
Samsung
Hermetic reciprocating compressor.
Refrigerant
R134a
Optimized for domestic refrigeration.
Voltage range
200‑220V 50Hz / 220V 60Hz
Single‑phase AC power.
Phase
1Ph, thermally protected
Internal overload protector.
Locked Rotor Amps (LRA)
5.5 A (label)
Indicates starting current peak.
Typical displacement (family)
≈ 6–7 cm³
Comparable to SD162Q‑L1UA at 6.16 cm³.
Motor type
RSCR / RSIR equivalent
Relay start with start capacitor, high starting torque.
Compliance
CE, RoHS
For household appliances in EMEA.
These values make the Samsung SD162H‑L4UA suitable for compact refrigerators in the 150–250 liter class where moderate starting current and good efficiency are important.
Cooling performance and application range
Samsung does not publish an open public sheet for every sub‑suffix, but performance can be estimated from SD162Q‑L1UA and similar 1/5 HP R134a LBP models.
Operating condition
Typical value (SD162 family)
Comment
Displacement
about 6.1–6.9 cm³
Similar frame size to SD162Q‑L1UA (6.16 cm³).
Nominal power
≈ 1/5 HP
Classified for small refrigerator duty.
Evaporating temperature
−30 °C to −10 °C
LBP range for fresh‑food and freezer compartments.
Condensing temperature
≈ 54 °C (ASHRAE)
Standard test condition.
Cooling type
Natural convection shell cooling
No external fan required.
In practical use this means the compressor can work both in standard refrigerator mode around −10 °C evaporating and in small freezer compartments near −25 °C with reduced capacity but stable operation.
Comparison with similar R134a compressors
To help with replacement and design decisions, the next table compares Samsung SD162H‑L4UA with two other 1/5–1/4 HP R134a hermetic compressors often referenced in technical catalogs.
R134a domestic compressors comparison
Feature
Samsung SD162H‑L4UA S01
Samsung SD162Q‑L1UA
ACC GL80AN
Refrigerant
R134a
R134a
R134a
Nominal HP
1/5 HP (family)
1/5 HP
1/5 HP
Displacement
≈ 6–7 cm³
6.16 cm³
8.1 cm³
Application
LBP refrigerator
LBP refrigerator
HMBP / beverage coolers
Voltage
200‑220V 50Hz / 220V 60Hz
220‑240V 50Hz
220V 50Hz
Motor type
RSCR / RSIR
PTC‑RSCR
RSIR
Typical use
Household fridge, small freezer
Household fridge, 1‑door / 2‑door
Display coolers, merchandisers
Compared with SD162Q‑L1UA, the SD162H‑L4UA keeps similar capacity but offers a label‑specified 5.5 A LRA, which can be interesting when designing systems with modest starting current constraints. Against ACC GL80AN, the Samsung unit generally has slightly lower displacement, making it better suited to compact cabinets where low noise and reduced energy use are more critical than maximum capacity.
Practical exploitation, reliability and installation tips
In workshop practice the Samsung SD162H‑L4UA S01 is appreciated for:
Strong load capacity during pull‑down of warm cabinets, inherited from the SD162 series design.
Reliable starting performance thanks to the RSCR/RSIR motor concept combined with an internal thermal protector.
Low noise and vibration, making it acceptable for domestic kitchens and small commercial premises.
When using this compressor as a replacement:
Match refrigerant (R134a), voltage, and application range (LBP) to the original unit to avoid overheating and low capacity.
Keep suction line sizing close to Samsung recommendations in general catalogs to preserve return gas cooling and oil return.
Use clean‑brazing practice and always replace the filter‑drier after opening the circuit to protect the compressor against moisture and acids.
The Maneurop MTZ160HW4VE is a heavy‑duty hermetic reciprocating compressor designed by Danfoss for medium‑back‑pressure commercial refrigeration with HFC refrigerants R134a, R404A, R407C, and R507A. It targets cold rooms, process chillers, milk tanks, and larger beverage installations where robust construction, multi‑refrigerant flexibility, and three‑phase power supply are required.
Technical specifications and operating data
The MTZ160HW4VE belongs to the MTZ160‑4VI family and combines a three‑phase motor with high‑efficiency pistons to reach double‑digit horsepower levels. Its nominal cooling capacity is about 20.3 kW at 50 Hz, with operation possible on 380‑415 V/3/50 Hz or 460 V/3/60 Hz networks.
Main technical data – MTZ160HW4VE
Parameter
Value
Notes
Compressor family
Maneurop MTZ160‑4VI
Medium‑temperature line.
Technology
Hermetic reciprocating
Piston design.
Nominal cooling capacity (50 Hz)
20.3 kW
At R404A MBP rating.
Motor power supply
380‑415 V 3~ 50 Hz, 460 V 3~ 60 Hz
Wide voltage range 340–440 V @ 50 Hz.
Motor protection
Internal overload protector
Thermally protected windings.
Max. operating current
Around 36 A at 460 V 60 Hz
Label LR (locked‑rotor) approx. 140 A.
Max. condensing temperature
50 °C
According to series guideline.
Minimum suction gas temp.
−35 °C
LP slide TS min.
PS design pressure
22.6 bar
PED data.
Oil type
Danfoss POE 160PZ
Factory charge of polyester oil.
Compatible refrigerants
R134a, R404A, R407C, R507A and new blends like R448A/R449A/R452A
Multi‑refrigerant platform.
This table shows why the MTZ160HW4VE is positioned as a 13 hp‑class compressor for large medium‑temperature duties rather than domestic or small commercial equipment. The internal overload, POE 160PZ oil, and 22.6‑bar shell rating give it the safety margin needed for high‑pressure HFC blends like R404A and R507A.
Field applications and exploitation potential
Because of its capacity and three‑phase motor, the MTZ160 series is frequently installed in:
Medium‑temperature cold rooms for food storage in supermarkets and restaurants.
Process chillers, milk tanks, and air‑dryer systems that need stable evaporating temperatures and long run times.
For installers, the multi‑refrigerant capability is a real advantage: the same MTZ160HW4VE shell can be used with traditional R404A/R507A or retrofitted to lower‑GWP blends like R448A or R449A, provided the system is re‑calculated using Danfoss performance software. The POE 160PZ oil ensures full miscibility with HFC and HFO blends, which is essential for good oil return in long piping runs and vertical risers in supermarket systems.
Value comparison with another Maneurop and Copeland models
To position this compressor on the market, it is useful to compare it with a smaller Maneurop MTZ80‑4VI and with a scroll alternative such as a Copeland ZR81KCE.
Capacity comparison
Model
Technology
Refrigerants
Nominal capacity at 50 Hz
Typical application
MTZ80‑4VI
Hermetic reciprocating
R404A/R507A/R407C/R134a
≈10 kW at MBP.
Small cold rooms, display cases.
MTZ160HW4VE (MTZ160‑4VI)
Hermetic reciprocating
R404A/R507A/R407C/R134a
20.3 kW at MBP.
Large cold rooms, process cooling.
Copeland ZR81KCE
Hermetic scroll
R404A/R407C etc.
≈18–19 kW at AHR MBP conditions.
Packaged condensing units, rooftop units.
The MTZ160HW4VE clearly delivers about double the cooling capacity of the MTZ80‑4VI, which justifies its use in bigger cold rooms or multi‑evaporator racks. Against a similar‑capacity Copeland scroll, the reciprocating design may be a bit noisier but offers higher displacement and strong performance at lower evaporating temperatures, making it attractive in heavy commercial refrigeration.
Medium‑temp, usually not as deep at low evaporating.
Similar condensing limits depending model.
Some models have narrower approved refrigerant lists.
From this table, the MTZ160HW4VE stands out by its very wide refrigerant portfolio, which is a strong value for installers looking for future‑proof solutions during HFC phase‑down. Scroll compressors remain strong competitors in efficiency and sound level, but they are not always as tolerant to liquid slugging or deep evaporating conditions as a rugged reciprocating Maneurop.
Installation, reliability and service notes
Danfoss guidelines for MT/MTZ compressors specify that these units must be installed with proper crankcase heaters, suction line filters, and accurate superheat control to avoid liquid floodback. They also recommend limiting the number of starts to around 12 per hour and ensuring correct phase rotation and voltage balance to protect the three‑phase motor.
During service, only POE 160PZ oil should be used, and charging must be done as a liquid from the cylinder when handling zeotropic blends such as R407C, R448A, or R449A to prevent fractionation. When retrofitting from R404A to a lower‑GWP blend, system components such as expansion valves and line sizes must be checked against the new operating pressures and mass flow predicted by Danfoss software tools.
Mbsmpro.com, Compressor, KCE444HAG, 3/8 Hp, Copeland, R134a, 230V 50Hz, High / Medium temperature, Water cooler applications
Overview of the Copeland KCE444HAG compressor
The Copeland KCE444HAG is a hermetic reciprocating compressor designed for high and medium temperature commercial refrigeration using R134a refrigerant. It is widely used in water coolers and bottle coolers where stable performance, compact size, and low noise are required.
Technical specifications and operating range
The KCE444HAG belongs to the KCE family and uses a connecting‑rod type reciprocating mechanism with a single‑phase induction motor. Its evaporating temperature range is approximately −17.8°C to +12.8°C, covering typical high / medium temperature applications in beverage and water cooling.
Main electrical and performance data
Parameter
Value
Notes
Refrigerant
R134a
HFC, medium‑pressure.
Nominal horsepower
0.36 HP (≈3/8 HP)
Depending on rating condition HBP/CBP.
Cooling capacity
1077 W (HBP), 551 W (CBP)
At specified EN12900 conditions.
Power input
475 W (HBP), 339 W (CBP)
Single‑phase operation.
Voltage / frequency
230 V, 50 Hz, 1‑phase
Typical for water coolers 40–80 L.
Motor type
2‑pole single‑phase induction
Internally thermally protected.
Application group
High / Medium temperature (HBP / CBP)
Not suitable for low‑temperature freezing.
Compressor cooling
Fan, about 350 ft³/min
Forced air cooling around shell.
Oil type / volume
POE, approx. 0.31 L
Pre‑charged from factory.
Approx. internal free volume
2400 cm³ (81.1 oz)
Without oil.
This specification table is essential for system designers who must match condenser size, evaporator load, and expansion device selection to the compressor envelope. Using the correct voltage, frequency, and oil type is critical to preserve warranty and avoid early motor or mechanical failure.
Application examples and exploitation in the field
In practice, the KCE444HAG is commonly installed in:
Water coolers between 40 and 80 liter nominal storage.
Bottle coolers and small commercial beverage merchandisers operating in high or medium temperature ranges.
For water coolers, the compressor offers enough capacity to chill drinking water quickly while keeping energy consumption moderate, thanks to its roughly 475 W input at high‑back‑pressure conditions. In bottle coolers, the wide evaporating envelope from negative temperatures up to more than +10°C allows flexible control of cabinet temperature without putting the compressor outside its design limits.
Performance comparison with similar compressors
To understand the real value of the KCE444HAG, it is useful to compare it with another well‑known R134a hermetic compressor such as the GL90AA (ZMC EGL90AA) widely used in domestic and light commercial refrigeration.
Capacity and power comparison
Model
Refrigerant
Nominal HP
Cooling capacity (approx.)
Input power
Typical use
KCE444HAG
R134a
0.36 HP
1077 W (HBP), 551 W (CBP)
475 W (HBP)
Commercial water/bottle coolers.
EGL90AA (GL90AA)
R134a
0.25 HP
227 W (LBP)
–
Domestic refrigerators, small LBP cabinets.
From this table, the KCE444HAG clearly delivers a much higher cooling capacity than the EGL90AA, which translates into faster pull‑down times and suitability for larger, more demanding systems. However, the smaller EGL90AA consumes less power and is better suited where low‑back‑pressure, small‑load operation is required, such as household fridges and compact freezers.
Application temperature range comparison
Model
Application group
Evaporating temperature range
KCE444HAG
HBP / CBP
−17.8°C to +12.8°C.
EGL90AA
LBP
Around −35°C to −6.7°C in typical LBP charts.
The table shows why the KCE444HAG is chosen for positive temperature applications like water coolers, while the EGL90AA works better in freezer‑type systems requiring lower evaporating temperatures. Selecting the wrong compressor for the required evaporating range can lead to high discharge temperatures, low efficiency, and premature failure.
Installation, reliability, and service considerations
The KCE444HAG compressor must be operated inside the condensing and evaporating temperature envelope defined by the manufacturer to guarantee long service life. The datasheet specifies that performance values are valid only inside this envelope and also gives maximum allowable internal moisture and solid residue limits, emphasizing the need for clean, well‑evacuated systems.
Technicians should:
Use R134a only and charge with the correct POE oil volume if a major repair requires oil replacement.
Keep the mounting angle within the 5° limit and respect guidelines for handling and disposal listed in the detailed product documentation.
Good airflow around the compressor and condenser, combined with properly sized capillary or expansion valve, keeps shell temperature and discharge pressure under control, further improving reliability in continuous water‑cooler duty.
Mbsmpro.com, Compressor, BMG110NHMV, 1/4 hp, LG inverter, Cooling & Freezing, R600a, 220‑240V 50/60Hz, LBP capacity, BLDC, −29°C to −10°C
The LG BMG110NHMV is a variable‑speed BLDC inverter compressor for R600a refrigerators and freezers, working on 220–240 V, 50/60 Hz in low‑back‑pressure applications. With a nominal rating close to 1/4 hp and a speed range from 1200 to 4500 rpm, it delivers flexible capacity and high efficiency for modern domestic appliances.
BMG110NHMV technical profile
LG’s catalog lists the BMG110NHMV in the BMG inverter R600a series, designed for high‑efficiency household refrigerators. The nameplate confirms R600a refrigerant, thermal protection and 220–240 V supply.
At lower speeds like 1500–1800 rpm, capacity drops to around 102–125 W while COP remains near 1.74–1.75, allowing the compressor to modulate for part‑load efficiency.
Capacity table across speeds
The inverter control lets the same compressor cover a wide load range without cycling, which is reflected in LG’s performance table.
Cooling capacity vs power – BMG110NHMV (R600a LBP)
Speed (rpm)
Capacity (kcal/h)
Capacity (W)
Capacity (Btu/h)
Power (W)
COP (W/W)
EER (Btu/W·h)
4500
225
262
894
146
1.79
6.11
3000
172
200
683
108
1.85
6.32
1800
108
125
427
72
1.75
5.97
1500
88
102
349
59
1.74
5.95
1200
70
82
279
48
1.72
5.87
These values show how the inverter platform lets manufacturers tune energy labels by operating much of the time at lower speeds, while still having 262 W on tap for rapid pull‑down.
Comparison with other LG inverter R600a models
LG’s catalog groups the BMG110NHMV with BMG110NAMV and BMG089 series models, all R600a BLDC compressors for LBP applications. Comparing their data helps installers and designers choose the right size.
LG R600a BLDC inverter comparison
Model
Series
Nominal hp class
Capacity at 4500 rpm (W)
Power (W)
COP (W/W)
Typical cabinet volume*
BMG089NAMV
BMG
≈ 3/16 hp
217 W
119 W
1.83
200–260 L refrigerators
BMG089NHMV
BMG
≈ 3/16 hp
217 W
126 W
1.72
high‑efficiency 200–260 L
BMG110NAMV
BMG
1/4 hp class
262 W
144 W
1.82
280–350 L fridges/freezers
BMG110NHMV
BMG
1/4 hp class
262 W
146 W
1.79
280–350 L refrigerators / freezers
*Cabinet volume estimates are typical ranges inferred from inverter R600a design practice, not explicit catalog values.
The BMG110NHMV thus occupies a sweet spot between the smaller BMG089 series and larger BMK/BMA models, ideal for mid‑size no‑frost or multi‑door refrigerators where load fluctuates strongly.
Comparison with fixed‑speed R600a compressors
To highlight the benefit of inverter technology, it is useful to compare BMG110NHMV with a typical constant‑speed R600a compressor of similar hp rating. LG’s own reciprocating catalog and third‑party suppliers show 1/4 hp fixed‑speed R600a models with similar cooling capacity but higher average power consumption.
Inverter vs fixed‑speed R600a – indicative comparison
Feature
BMG110NHMV (inverter)
Typical 1/4 hp fixed‑speed R600a compressor
Speed control
1200–4500 rpm via BLDC inverter
Single speed (≈ 3000 rpm)
Nominal capacity
≈ 262 W at −23.3 °C
≈ 250–270 W at similar point
Input power
146 W at full speed, 48–108 W at reduced speed
≈ 180–200 W constant
COP / EER
Up to ≈ 1.85 W/W (6.3 Btu/W·h)
Typically 1.5–1.6 W/W (5.1–5.5 Btu/W·h)
Temperature control
Smooth, low‑noise modulation
On/off cycling, higher noise and temperature swing
Energy label impact
Enables A+/A++ energy classes in many markets
Usually lower efficiency class
This comparison explains why OEMs increasingly specify BMG‑series compressors in premium, energy‑efficient refrigerators.
Safety and application notes for R600a systems
Because BMG110NHMV uses R600a, a flammable hydrocarbon, system design and service procedures must follow IEC and manufacturer guidelines.
Charge quantities in household refrigerators are limited, typically below 150 g, to remain within safety limits.
Electrical components near the compressor must be sealed or spark‑free, and any repair involving brazing requires full refrigerant recovery and ventilation.
These constraints do not reduce performance; they simply require disciplined handling, especially when replacing the compressor or modifying pipework.
Mbsmpro.com, Compressor, PE90HME‑4, 1/3 hp class, GMCC, Cooling, R134a, 265–295 W, 1.55 A, 1Ph 220‑240V 50/60Hz, LBP capacity, RSCR motor, −23.3°C to −10°C
The GMCC PE90HME‑4 is a hermetic reciprocating refrigerator compressor optimized for R134a and low‑back‑pressure applications at 220–240 V, 50/60 Hz. With a displacement of about 9.0 cm³ and catalog cooling capacities between 265 and 295 W around freezer conditions, it sits in the 1/3 hp performance class and targets domestic and light commercial refrigerators.
GMCC PE90HME‑4 technical identity
The label identifies the compressor as thermally protected, RoHS‑compliant and designed for R134a static‑cooling appliances. It belongs to the PE series of GMCC light commercial units produced by Anhui Meizhi Compressor Co., Ltd.
Nameplate and catalog data
Item
Value / description
Brand
GMCC – Anhui Meizhi Compressor Co., Ltd.
Model
PE90HME‑4
Refrigerant
R134a, low‑back‑pressure (LBP) range
Voltage / frequency
220–240 V, 50/60 Hz, single‑phase (1Ph)
Motor type
RSCR (resistance start, capacitor run)
Displacement
≈ 9.0 cm³
Cooling capacity
265–295 W at LBP conditions (−23.3 °C evap, 32.2 °C amb.)
Input power
≈ 1.52–1.55 A rated current at 220–240 V
Application
Static‑cooling domestic and small commercial refrigerators, freezers and coolers
The RSCR motor concept means a start capacitor is used only during start while a smaller run capacitor remains in circuit, balancing starting torque, efficiency and cost for fractional‑horsepower refrigeration.
Operating envelope and performance
GMCC’s reference data for the PE90H1F‑4 and PE90HME‑4 show nearly identical working limits, giving a clear view of the envelope in which this compressor is expected to operate. These limits are critical for system designers who must match capillary length, condenser size and evaporating temperature.
Operating limits
Parameter
Typical PE90HME‑4 values
Evaporating temperature range
−35 °C to −10 °C (LBP)
Nominal rating point
−23.3 °C evap / 32.2 °C ambient / 55 °C condensing
Voltage range
187–254 V (50 Hz)
Ambient temperature range
0–43 °C
Max condensing temperature
60–70 °C
Max discharge gas temperature
130 °C
Max winding temperature
130 °C (internal)
Max pump‑down pressure
≈ 1.82 MPa
At the nominal point the compressor typically delivers around 265 W at 1.55 A, while higher ambient or less negative evaporating temperatures move capacity closer to 295 W but also increase power input. GMCC specifies vibration levels below 4.9 m/s² and sound levels compatible with household refrigerator noise expectations.
Comparison with other GMCC R134a PE series models
To position the PE90HME‑4 correctly for selection and replacement, it helps to compare it with nearby models such as PE65H1H‑9 and PE90H1F‑9 from the same GMCC R134a range.
GMCC R134a LBP models – performance comparison
Model
Displacement (cm³)
Cooling capacity at 50 Hz (W)*
HP class
Rated current (A)
Application
PE65H1H‑9
6.5
190–195 W
1/4 hp
≈ 1.47–1.55
LBP domestic refrigerators
PE90HME‑4
9.0
265–295 W
1/3 hp class
≈ 1.52–1.55
LBP refrigerators / freezers
PE90H1F‑9
9.0
275–280 W
1/3 hp+
≈ 1.50
LBP with wide‑voltage range
PE120HMH★
12.0
320 W
3/8–1/2 hp
≈ 1.45
L/MBP commercial coolers
*Capacity values taken at −23.3 °C evap / 32 °C amb., minor differences by catalog edition.
Compared with the PE65H1H‑9, the PE90HME‑4 delivers roughly 40–50% more capacity at similar current, making it better suited to 280–400 L refrigerators or small freezers that need stronger pull‑down. Against the PE90H1F‑9, performance is very close; differences are mainly in voltage tolerance (wide‑range versions) and detailed application approvals rather than raw capacity.
Practical applications and selection tips
Designers and technicians usually choose the GMCC PE90HME‑4 when they need a robust, mid‑size R134a compressor that balances capacity, energy efficiency and cost. It is especially attractive in markets where 220–240 V 50 Hz is standard and where appliances are exposed to high ambient temperatures.
Typical uses
Static‑cooling household refrigerators in the 300–400 L range.
Upright or chest freezers requiring −23 °C design evaporating temperature.
Commercial beverage coolers and display cases using R134a and capillary expansion.
Selection and replacement considerations
Checkpoint
Why it matters
Refrigerant
Must be R134a; conversion from R12 or R600a requires full system redesign.
Evaporating temperature
Ensure design conditions fall inside −35 to −10 °C LBP range.
Condenser and capillary sizing
Match to 265–295 W capacity to avoid flood‑back or high‑head faults.
Voltage stability
Mains should remain within 187–254 V; more unstable grids may justify wide‑voltage models like PE90H1F‑9.
Start components
RSCR start kit (PTC + capacitor) must match GMCC’s specified values to guarantee torque and reliability.
Mbsmpro.com, Compressor, CSR terminals, Common Start Run, PTC relay, overload, start and run capacitor wiring, PSC CSIR CSR motors, multimeter ohm testing
Compressor Windings, CSR Terminals, and Start Devices: Practical Guide for Technicians
Single‑phase hermetic compressors use three terminals – Common (C), Start (S), and Run (R) – and a combination of overload, relay, and capacitor to start and run safely. Correctly interpreting CSR pin configuration and wiring the starting devices is critical for reliable refrigeration service work and for avoiding repeated compressor burn‑outs.
Understanding C, S, and R terminals
On most refrigeration compressors, the three pins form either a triangle or a straight line, and each pin connects to one or both motor windings inside the shell. When the original diagram is missing, technicians can still identify each terminal by measuring resistance with a digital multimeter.
Typical resistance relationships
Measurement pair
Identification rule
Typical range*
C–R
Run winding (lowest resistance)
About 1–5 Ω on small fractional‑HP units.
C–S
Start winding (medium resistance)
Usually 3–11 Ω, often 3–5 times C–R.
S–R
Start + run (highest resistance)
Equals C–S + C–R by ohm’s law.
*Values vary by model; always compare with the manufacturer’s data sheet when available.
To confirm readings, many trainers recommend writing each resistance value on a sketch of the pin layout and checking that the highest reading equals the sum of the other two. If the numbers do not add up, the compressor may have an open winding or internal damage.
CSR, RSIR, CSIR and PSC motor concepts
Single‑phase hermetic motors are classified by how capacitors and relays are used with start and run windings. The most common arrangements in light commercial refrigeration are RSIR, PSC, CSIR and CSR, each with different starting torque and component requirements.
Motor types and starting characteristics
Motor type
Components
Typical use case
Starting torque
RSIR (Resistance Start Induction Run)
Start relay + start winding, no capacitor
Small domestic refrigerators, low starting torque.
Low
PSC (Permanent Split Capacitor)
Run capacitor in series with start winding
Smooth, efficient operation, good for low starting load.
Low–medium
CSIR (Capacitor Start Induction Run)
Start capacitor + relay, start winding only during start
Higher torque for larger compressors up to ≈ 3/4 HP.
High
CSR (Capacitor Start Capacitor Run)
Start capacitor + run capacitor + potential or current relay
Very high starting torque for hard‑start conditions.
Very high
CSR systems keep a smaller run capacitor in the circuit after startup to improve power factor and running efficiency while the start capacitor is removed by the relay. These motors are common in high‑starting‑torque (HST) versions of commercial compressors where frequent cycling and high condensing pressures are expected.
Overload, PTC relay, and run capacitor wiring
The start device assembly brings together three safety‑critical components: thermal overload, relay (or PTC), and capacitor. Correct wiring ensures that line voltage reaches the run winding continuously, energizes the start winding only during startup, and disconnects the compressor when overcurrent or overheating occurs.
Typical PTC / solid‑state relay and overload wiring (120–240 V)
Step
Connection
Function
1
Line (L) feeds the overload protector, which then connects to C
Overload opens on excessive current or shell temperature.
2
Solid‑state relay/PTC connects between C and S with start capacitor in series if CSIR/CSR
Provides high initial current to start winding, then increases resistance and drops out.
3
Line (L) also connects directly to R through the control circuit (thermostat, contactor)
Supplies continuous voltage to run winding during operation.
4
Run capacitor connects between S and R in PSC and CSR systems
Improves running efficiency and torque.
Before wiring, technicians should verify that the overload has less than 1 Ω resistance when cold and that the relay coil or PTC element shows the manufacturer’s specified resistance range. Any signs of arcing, discoloration or cracked housings are reasons to replace the start device rather than re‑use it.
Multimeter checks and safety best practices
Accurate ohm measurements and ground tests are indispensable when diagnosing compressor failures or confirming correct CSR identification. At the same time, technicians must follow lock‑out/tag‑out procedures and respect the refrigeration system’s pressure hazards.
Recommended testing workflow
Isolate and discharge
Disconnect power, verify zero voltage, and discharge capacitors before touching any terminals.
Ohm the windings
Measure all three combinations (C–R, C–S, S–R), verify the add‑up rule, and compare with catalog ohm ranges when available.
Check for shorts to ground
Use the highest megohm setting to test between each terminal and the shell; any measurable continuity usually means the compressor is grounded and must be replaced.
Verify start components
Measure overload resistance (<1 Ω closed) and relay / PTC resistance (3–26 Ω typical on many plug‑in designs), and confirm capacitors with a capacitance meter.
Monitor running amperage
After re‑wiring, compare running current with the nameplate RLA or data‑sheet values; high amps may signal improper capacitor size, high head pressure or internal mechanical problems.
Compressor windings, terminal pin configuration, and the start components used in a refrigerator or air-conditioning compressor.
1. Compressor Windings and Terminals
A single-phase compressor has three terminals: • C (Common) • S (Start) • R (Run) These three pins can be arranged in different physical positions, but their electrical function is the same.
Winding Resistance Values (Typical)
Measured using a multimeter (Ohms Ω): • C to S (Start winding): 3 Ω – 11 Ω • C to R (Run winding): 1 Ω – 5 Ω • S to R = Start + Run (highest resistance) The Start winding always has higher resistance than the Run winding.
2. Electrical Connection on the Compressor
The diagram shows two possible layouts of the compressor pins. Even if the position changes, the labels C, S, and R must be identified correctly before wiring.
3. Start Device Assembly
The start system usually consists of: • PTC Relay (Solid State Relay) • Overload Protector • Run Capacitor (if used)
Functions: • PTC Relay: – Temporarily connects the Start winding during startup. – Disconnects it automatically once the compressor is running.
• Overload Protector: – Protects the compressor from overheating or overcurrent. – Opens the circuit if temperature or current is too high.
• Run Capacitor (optional on some models): – Improves efficiency and torque during operation.
4. Multimeter Testing (Shown in Image)
Overload Test: • Measure front to back • Reading should be less than 1 Ω (closed circuit)
Relay Test: • Measure between S and R • Normal reading: 3 Ω – 26 Ω
Abnormal readings indicate a faulty relay or overload.
5. Power Supply • The diagram shows 120 VAC input going through: – Overload → Relay → Compressor terminals
6. Internal Relay View
The bottom-right images show the internal structure of the relay, helping identify contacts and working condition.
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Danfoss FR10B 103U2954 Compressor
Category: Refrigeration
written by www.mbsmpro.com | January 1, 2026
Danfoss FR10B 103U2954 Compressor: Technical Identification, Application Range, and Performance Data
Most references that detail this model (FR10B, code 103U2954) explicitly describe it as a “FR10B HST 1/4 HP” or note power range information confirming the quarter‑horsepower classification.
The Danfoss FR10B with code 103U2954 is a light commercial hermetic reciprocating compressor designed for low‑back‑pressure refrigeration on 220–240 V, 50/60 Hz power supplies. It is widely used in commercial refrigerators and freezers and is part of the Danfoss/SECOP FR series known for compact design and reliable operation in R12 and later R134a applications.
Nameplate decoding: FR10B 103U2954
The yellow identification label on this compressor summarizes its key application and electrical data in a compact format. Understanding every line of that label is essential for correct replacement, troubleshooting, or system redesign.
Part of light commercial range for small refrigeration units.
103U2954
Complete compressor code number
Identifies factory configuration, oil charge and terminal box.
220–240 V ~ 60 Hz / 50 Hz
Dual‑frequency single‑phase motor
Designed for 220–240 V at either 50 or 60 Hz mains.
LBP / LBP‑HBP
Low‑back‑pressure and some high‑back‑pressure use
Suited to freezers (LBP) and certain refrigerator duties (HBP) depending on model variant.
LST / HST motor
Low / high starting torque versions
CSIR or RSIR motor concepts, depending on accessory set and application.
Made in Slovenia
Manufacturing plant
Danfoss/SECOP European production facility.
Technical specifications and operating envelope
The FR10 family has been documented in several universal catalogs, which provide detailed operating conditions for R12 and later R134a refrigerants. The FR10B 103U2954 follows the same mechanical platform and performance class as the FR10G universal compressor.
Main technical data (FR10 series, R134a/R12 class)
Parameter
Typical value / range
Source indication
Refrigerant
R12 on legacy 103U2954 versions; R134a on FR10G successors
Application
LBP (freezers −30 °C to −10 °C evap); some HBP/MBP possible
Displacement
≈ 9.05 cm³
FR10G catalog data.
Voltage range
187–254 V at 50 Hz for LBP
Max ambient temperature
43 °C
Max condensing temperature
60–70 °C continuous/short
Motor type
RSIR/CSIR single‑phase
Oil type / charge
Polyolester or mineral, ≈ 450 cm³ depending on refrigerant
Max refrigerant charge
≈ 900 g
Weight
Around 10–11 kg
Performance snapshot at typical freezer conditions
Condition
Capacity (approx.)
Power input
Notes
Evap −25 °C, cond 55 °C, 220 V / 50 Hz
~130–150 W refrigerating
~200–230 W
FR10G LBP data as reference for FR10B.
Evap −15 °C, cond 55 °C
Higher capacity around 200 W
Increased input and COP
Suited for high‑efficiency bottle coolers.
These figures are indicative and should always be cross‑checked with the exact data sheet for the specific refrigerant and code number when designing or verifying a system.
Application in commercial refrigeration
The FR10B 103U2954 compressor is typically installed in small commercial cold rooms, display freezers, under‑counter cabinets and chest freezers where compact dimensions and dependable low‑temperature performance are critical. Its evaporating temperature range down to about −30 °C makes it suitable for frozen food storage and ice‑cream applications.
Typical systems using FR10B
Glass‑door upright freezers in supermarkets and convenience stores.
Compact chest freezers and island cabinets for frozen food.
Under‑counter commercial refrigerators where LBP/HBP dual range is required.
Advantages for installers and OEMs
Advantage
Description
Proven reliability
Long‑running Danfoss/SECOP FR platform with global service support.
Wide voltage tolerance
Operates from 187–254 V, useful in markets with unstable mains.
Flexible application
LBP primary, with variants for HBP duties using alternative starting devices.
Compact footprint
Fits tight condensing unit housings and under‑counter cabinets.
Service notes, replacement options and energy considerations
Over time, FR10B compressors in the field often need replacement because of mechanical wear, electrical failures or refrigerant conversion projects. When selecting a replacement, technicians frequently upgrade to modern FR10G or FR10GX R134a versions that offer similar footprint but better efficiency and environmental performance.
Replacement and retrofit guidance
Match application range and refrigerant
For original R12 systems, many retrofit projects convert to R134a with corresponding FR10G/FR10GX models, observing manufacturer guidelines for oil type and charge.
System components such as capillary tubes and filters must be recalculated for the new refrigerant to maintain correct superheat and capacity.
Preserve electrical compatibility
Ensure that the new compressor operates on 220–240 V, 50/60 Hz and that starting devices (PTC, relay, capacitor) match the recommended CSIR/RSIR configuration.
Check locked‑rotor current and recommended fuse size to avoid nuisance tripping on older installations.
Optimize energy efficiency
Danfoss high‑efficiency light commercial compressors can cut appliance energy consumption by 10–30% compared with older standard models, which is especially relevant in 24/7 commercial refrigeration.
When installing a replacement, technicians should verify condenser cleanliness, airflow, and thermostat settings to fully benefit from improved compressor performance.
Toshiba 3-Door 16 cu.ft No‑Frost Silver Refrigerator: A Practical Workhorse for Modern Homes
The Toshiba 3‑door 16 cu.ft no‑frost silver refrigerator from El Araby is designed for families who want generous storage, stable cooling, and low maintenance in a compact footprint. It combines vapor no‑frost cooling, a dedicated middle fresh zone, and silver finish that matches most contemporary kitchens.
Key specifications and capacity
Net capacity about 351 liters (≈16 cu.ft), enough for a medium to large household.
Three-door layout: top freezer, central fresh/vegetable compartment, and main fridge section below for everyday items.
Approximate dimensions: width 66.5 cm, depth 68.4 cm, height 175.3 cm, giving a tall but relatively slim cabinet that fits standard kitchen niches.
Color: silver with hardened glass shelves for better load resistance and easier cleaning.
Toshiba 3‑door 16 cu.ft no‑frost – main data
Feature
Detail
Model family
GR‑EFV45 series (El Araby Toshiba)
Cooling type
No‑Frost with vapor air circulation
Doors
3 doors: freezer / fresh zone / fridge
Net capacity
≈351 L (around 16 cu.ft)
Color
Silver exterior
Shelves
Tempered glass, adjustable
Energy class
Class A, optimized for reasonable power use
Refrigerant
Non‑CFC, eco‑friendly design
Extra features
Plasma deodorizer (on many variants), low‑noise design
Cooling technology and food preservation
The refrigerator uses a no‑frost vapor cooling system that circulates cold air around the compartments, preventing ice build‑up on the walls and evaporator. This means no manual defrosting and more stable temperatures for long‑term storage.
Multi‑air flow channels distribute air in several layers, reducing temperature differences between shelves and helping vegetables and dairy stay fresh longer.
Many GR‑EFV45‑series units include a plasma or bio‑deodorizer module that absorbs odors and reduces bacteria, which is particularly valuable in the middle fresh zone for fruits and vegetables.
Design, usability, and everyday practicality
The three‑door configuration is one of the strong points of this Toshiba line. It offers a separate middle drawer or compartment for fruits and vegetables, isolating humidity and smells from the main fridge area.
Adjustable glass shelves and door balconies allow flexible loading, from tall bottles to large pans or cake boxes.
Silver exterior and integrated handles give a neutral, modern appearance that blends with stainless or grey appliances, which is often requested in open kitchens.
Noise‑reduced compressor design and non‑CFC refrigerant make it a relatively quiet and environmentally conscious appliance for daily home use.
Reliability, market positioning, and who it suits
El Araby distributes this Toshiba 16‑foot, 3‑door refrigerator widely in North Africa and the Middle East, targeting families that need a durable mid‑range no‑frost unit rather than a premium smart fridge.
Ten‑year compressor warranty is common on this series, underlining its positioning as a long‑term investment for domestic kitchens.
The size and three‑door design make it especially suitable for households that shop weekly, cook frequently, and want one dedicated vegetable/fresh zone without moving to a bulky side‑by‑side model.
Bitzer 4J‑13.2Y‑40P Compressor: How to Read and Use the Nameplate Data
The Bitzer 4J‑13.2Y‑40P is a semi‑hermetic reciprocating compressor widely used in commercial refrigeration and process cooling installations around the world. It is designed for three‑phase power supplies and offers reliable operation in medium‑ to high‑temperature applications. Understanding its nameplate is essential for safe commissioning, correct electrical connection, and accurate system sizing.
Electrical characteristics
The identification plate lists the nominal three‑phase voltage ranges of 380–420 V at 50 Hz and 440–480 V at 60 Hz, showing that this model is suitable for international grids and export equipment. This flexibility allows installers to deploy the same compressor frame in regions with different mains standards, provided the motor protection and wiring are adjusted accordingly.
At 50 Hz, the maximum running current is specified at 27 A, while the starting current in star (Y) connection reaches 81 A and in part‑winding (YY) configuration 132 A. At 60 Hz, the maximum running current remains 27 A, but the higher frequency increases the starting demand and speed, so the electrical design of contactors, circuit‑breakers and cables must respect these values.
Key electrical data
Parameter
50 Hz value
60 Hz value
Nominal voltage
380–420 V
440–480 V
Max. running current
27 A
27 A
Starting current (Y)
81 A
81 A
Starting current (YY)
132 A
132 A
Performance and operating limits
The nameplate also indicates the theoretical displacement flow rate and motor speed for each frequency. At 50 Hz the compressor delivers 63.5 m³/h at 1450 rpm, while at 60 Hz the flow rises to 76.7 m³/h at 1750 rpm, which directly influences cooling capacity and requires recalculation of expansion valve and piping selections when changing frequency. These figures are important for designers who convert catalog capacities to real site conditions, especially in retrofits where a 50 Hz machine is driven from a 60 Hz supply or via a frequency inverter.
The enclosure rating is IP54, and the plate notes the combination “ND/HD max. 19/28 bar”, indicating the maximum permissible operating pressure on the low‑ and high‑pressure sides of the compressor shell. Respecting these limits is crucial for safety valves, pressure switches and leak testing procedures during commissioning and maintenance.
Performance snapshot
Frequency
Flow rate (m³/h)
Speed (rpm)
Max. shell pressure (ND/HD)
50 Hz
63.5
1450
19 / 28 bar
60 Hz
76.7
1750
19 / 28 bar
Practical guidance for installers
For installers and service technicians, the nameplate of the 4J‑13.2Y‑40P acts as the main reference for electrical protection settings, cable sizing and motor starting method. Checking that the site voltage matches one of the listed ranges is a first step before any connection, followed by the choice between star‑delta, part‑winding or direct‑on‑line starting depending on the available switchgear and network capacity. The running current values help to set thermal overload relays and electronic motor protection units, reducing the risk of nuisance trips or motor damage under heavy load.
During commissioning, technicians should also compare the actual operating pressures and temperatures with the limits derived from Bitzer’s application range diagrams for this model. This ensures that the compressor runs within its safe envelope when paired with modern refrigerants, oil types and system designs recommended by the manufacturer. Such discipline is especially important for demanding applications like supermarket racks, process chillers and cold‑storage plants where the 4J‑13.2Y‑40P is often installed.
Documentation and further resources
Bitzer provides full technical information, performance curves and motor data sheets for the 4J‑13.2Y‑40P, which complement the basic figures printed on the nameplate. These documents are available in the official digital library and are regularly updated to reflect changes in approved refrigerants, oils and electrical components. Engineers and technicians should always consult the latest documentation before selecting replacement compressors or redesigning existing installations, as updated guidelines may affect allowed operating envelopes and accessory choices.
Copeland QR15M1‑TFD‑501 compressor: technical profile, applications and selection guide
For HVAC professionals, the Copeland QR15M1‑TFD‑501 stands out as a low‑sound, high‑capacity hermetic reciprocating compressor designed for demanding commercial air‑conditioning and refrigeration systems. This article explores its key specifications, strengths, and how to integrate it correctly into new projects or retrofit jobs.
Main technical specifications
The QR15M1‑TFD‑501 belongs to the Copeland QR low‑sound series, a four‑cylinder hermetic reciprocating platform engineered for reduced vibration and noise in packaged and split systems. It is typically rated at around 12–12.5 HP, giving contractors solid capacity for medium‑ to high‑temperature applications such as rooftop units, air‑cooled chillers and large ducted systems.
Key data that installers usually look for include:
Refrigerant: R22, with mineral‑oil lubrication as standard on QR “R” family models.
Nominal cooling capacity: up to about 142 000 Btu/h (≈ 41.6 kW) at 60 Hz, covering a wide range of evaporating conditions.
Power supply: 3‑phase 380–420 V / 50 Hz and 460 V / 60 Hz, matching most commercial electrical grids worldwide.
Cylinders: 4‑cylinder design with a double scotch‑yoke mechanism, improving balance and running smoothness versus conventional rod‑and‑piston sets.
Typical operating envelope: medium‑ and high‑temperature commercial air‑conditioning duty.
Construction and performance advantages
Copeland’s QR series is built around a rugged, compact shell with internal suspension, which helps to isolate mechanical vibrations and minimize structure‑borne noise when the compressor is bolted to the base frame. The forged steel crankshaft and precision bearings are designed for high‑speed operation, giving good reliability in systems that cycle frequently or run long duty hours.
Inside the compressor, pistons, yokes and slide blocks are cast from special alloy aluminium, while piston rings use cast iron to maintain sealing and durability over long runtimes. A low‑foaming mineral oil is specified to stabilize lubrication under fluctuating load conditions, supported by a crankcase heater that reduces refrigerant migration during off‑cycles.
Electrical and protection features
The QR15M1‑TFD‑501 uses a three‑phase suction‑gas‑cooled motor, which takes advantage of return gas to remove heat from the windings and improve overall motor life. On TFD models, internal inherent line‑break protection is provided, cutting power if winding temperature or current rises beyond design limits, and some QR variants complement this with an external solid‑state protection module.
Standard rotalock or stub‑tube connections simplify brazing and servicing, and many units ship with an oil level test valve plus ports positioned for easy access to service gauges. These details may seem minor, but in a tight plant room or rooftop installation, better port layout can save significant time during commissioning and troubleshooting.
Typical applications and selection tips
Because of its power rating and low‑sound design, the QR15M1‑TFD‑501 is often selected for:
Commercial air‑conditioning units such as rooftop packages, air handlers and split systems.
Medium‑temperature refrigeration where low noise is important, including supermarkets, cold rooms near occupied spaces or hotels.
Retrofit projects replacing older R22 compressors of similar capacity, where matching voltage, displacement and oil type is critical.
When selecting this model, technicians usually:
Check that the system is still legally allowed to operate with R22 in their region, or confirm compatibility with any approved drop‑in refrigerant if permitted by manufacturer guidelines.
Compare duty‑point capacity (evaporating and condensing temperatures) against Copeland QR performance tables rather than relying only on nominal HP ratings.
Ensure correct crankcase heater control and suction line sizing to protect the compressor from liquid slugging on start‑up.
QR15M1‑TFD‑501 essential data table
Specification
Typical value / description
Compressor family
Copeland QR low‑sound hermetic reciprocating, 4‑cylinder.
Model
QR15M1‑TFD‑501.
Nominal power
About 12–12.5 HP.
Refrigerant
R22, mineral‑oil lubrication.
Cooling capacity (60 Hz)
Up to ≈ 142 000 Btu/h (≈ 41.6 kW) depending on conditions.
Voltage / phase / frequency
380–420 V 3~ 50 Hz; 460 V 3~ 60 Hz.
Application range
Commercial air‑conditioning and medium‑temp refrigeration.
Key features
Low‑sound shell, internal suspension, crankcase heater, internal motor protection.
Maintenance, reliability and retrofit considerations
Maintaining a QR15M1‑TFD‑501 correctly starts with oil management: technicians should always replace oil with the same viscosity grade mineral oil specified by Copeland and verify oil level after long transport or system leaks. Adequate superheat, properly set expansion devices and clean condenser surfaces are equally important to keep discharge temperatures within safe limits and prevent thermal trips.
In retrofit scenarios, attention must be paid to any system filters and driers, as long‑serving R22 circuits often contain moisture, acids or debris that can severely shorten compressor life if not addressed before start‑up. Where local regulations phase down or ban R22, owners may consider full system replacement or carefully engineered conversions to modern refrigerants, guided by manufacturer bulletins and local codes.
The Start winding always has higher resistance than the Run winding.
