MADEL KCA‑SUB zoning control module: wiring, functions and professional applications
The MADEL KCA‑SUB is an electronic zoning controller designed to manage up to six independent air‑conditioning zones from a single ducted unit. The image shows the KCA‑SUB installed in a junction box with its power,…
| Feature | Description |
|---|---|
| Product name | MADEL KCA‑SUB sub‑zone control panel for Zoning System. |
| Application | Zoning of 1–6 branches on ducted HVAC installations (sub‑zone operation). |
| Power supply | 230 VAC supply on dedicated terminals. |
| Zone outputs | Up to 6 motorized dampers, red (+) and black (–) wires, 0.75–1.0 mm² conductors. |
| Communication | RS485 AB bus (A = white, B = blue) for digital thermostats. |
| Sensors | NTC 10 kΩ return‑air temperature probe on NTC terminal. |
| Unit control | Y and G relay contacts to interface with indoor unit controls, on/off and mode. |
| Alarm output | Potential‑free normally open contact, closes in alarm condition. |
Electrostatic Paint Sprayer: Precision Coating for Modern Workshops
In many metalworking, HVAC and automotive workshops, an electrostatic paint sprayer has become the secret weapon for achieving premium finishes with less paint and less mess. This compact mobile system charges each droplet of paint…
| Feature | Typical specification / description |
|---|---|
| Application method | High‑voltage electrostatic liquid spray gun with adjustable voltage and paint flow. |
| Transfer efficiency | Often up to about 90% in optimized conditions, reducing overspray and material waste. |
| Compatible coatings | Solvent‑based and water‑based paints when used with appropriate isolation and hardware. |
| Ideal use cases | Metal cabinets, frames, HVAC units, machinery, automotive parts and complex geometries. |
| Mobility and layout | Mobile trolley with stainless tank, control cabinet and hoses for flexible positioning in the shop. |
Carel DN33V9MR20 Universal Controller: Reliable DIN-Rail Control For Modern HVAC Systems
The Carel DN33V9MR20 is a compact universal electronic controller designed for DIN‑rail mounting in professional HVAC and refrigeration panels. It offers a wide low‑voltage power‑supply range, two analogue and two digital inputs, and a robust…
| Feature | DN33V9MR20 specification |
|---|---|
| Mounting | DIN‑rail, compact housing DN33 series |
| Power supply | 12–24 Vac, 12–30 Vdc (multi‑voltage) |
| Analogue inputs | 2 AI (NTC/PTC, Pt1000, 0–5 V, 0–20 mA, depending on configuration) |
| Digital inputs | 2 DI for door switches, compressor status or alarms |
| Outputs | 1 relay / digital output with buzzer and IR receiver |
| Protection | Front panel IP40, complete controller IP10 |
| Typical uses | Refrigerated cabinets, small chillers, HVAC units, process temperature control |
Tecumseh CAJ9480T: The French‑Made Heart of Legacy R22 Cold Rooms
On the faded nameplate of this weathered compressor shell, one line stands out with absolute clarity: CAJ9480T – R22/R502 – Made in France. It is the unmistakable signature of a Tecumseh L’Unité Hermétique fully hermetic…
| Parameter | Typical CAJ9480T value |
|---|---|
| Compressor type | Fully hermetic reciprocating piston |
| Nominal horsepower | Approx. 5/8 HP (medium temperature) |
| Refrigerant | R22 (older labels may mention R22/R502; some variants accept R438A) |
| Voltage / frequency | 220–240 V, single phase, 50 Hz (voltage code F/FZ) |
| Displacement | About 15.2 cm³/rev |
| Rated Load Amps (RLA) | ≈ 3.9–4.0 A at 50 Hz |
| Locked Rotor Amps (LRA) | ≈ 24 A |
| Motor type | CSR, high‑start torque with start and run capacitor |
| Oil charge | Around 475–780 ml, mineral or alkylbenzene depending on version |
| Origin | Tecumseh / L’Unité Hermétique, France |
Replacing Unionaire Sensors with Kiriazi Deep Freezer Probes: What Technicians Must Check First
The picture shows a refrigeration technician holding several tubular temperature probes and a small white connector in front of a heavily frosted evaporator, capturing the exact moment of diagnosing a sensor fault in a no‑frost…
| Item | Unionaire digital fridge sensor | Kiriazi domestic deep freezer sensor |
|---|---|---|
| Sensor type | NTC thermistor | NTC thermistor |
| Typical nominal value | About 5 kΩ or 10 kΩ at 25 °C | About 5 kΩ or 10 kΩ at 25 °C |
| Encapsulation style | White/transparent plastic tube | White plastic or metal tube |
| Common mounting location | On evaporator or in air channel | On evaporator or clipped to coil |
| Connector style | 2‑wire, small rectangular plug | 2‑wire plug or bare leads |
| Use as replacement | Accepts equivalent NTC values | Can act as substitute when values match |
DC05CDNC1C 48V DC Cabinet Air Conditioner
Outdoor telecom cabinets, base stations and industrial enclosures rely on compact DC air conditioners to keep sensitive electronics within a safe temperature range. The Envicool DC05CDNC1C 48V DC cabinet air conditioner is one of these…
| Specification | Value |
|---|---|
| Model | DC05CDNC1C cabinet air conditioner |
| Power supply | –48 V DC nominal |
| Rated cooling capacity | 550 W at L35/L35 (≈1700 BTU/h) |
| Rated cooling input | 170 W at L35/L35 |
| Refrigerant | R134a |
| Cooling function | Cooling only or cooling + heating (depending on configuration) |
| Working temperature | Approximately –40 °C to +55 °C (typical for this model range) |
| Protection rating | IP65 for outdoor installation |
| Approx. dimensions | 315 × 170 × 545 mm (W×D×H) |
Frascold D2‑15Y / D2‑15.1Y
The Frascold D2 15Y is a semi‑hermetic reciprocating compressor designed for commercial and industrial refrigeration. With a 2 HP motor and 15.4 m³/h displacement, it delivers around 6–7 kW of cooling capacity using R404A, R448A…
| Parameter | Typical value |
|---|---|
| Model | D2‑15Y / D2‑15.1Y |
| Technology | Semi‑hermetic reciprocating, 2 cylinders |
| Displacement (50 Hz) | 15.36 m³/h |
| Nominal motor power | 1.5 kW – 2 HP |
| Oil charge | ≈ 1.1 L POE oil |
| Typical cooling capacity | ≈ 6.7 kW with R404A (EN12900 reference condition) |
| Application | Low/medium‑temperature refrigeration (LBP/MBP) |
| Compatible refrigerants | R22, R134a, R404A, R507A, R407A/F, R448A, R449A |
Frascold Z40‑154Y
The photos capture a heavy‑duty Frascold Z40‑154Y semi‑hermetic compressor, an Italian 40 HP unit designed for demanding freezer and cold‑room applications. Its nameplate shows a displacement of about 154 m³/h and robust pressure ratings, while…
| Specification | Value / Description |
|---|---|
| Compressor type | Semi‑hermetic reciprocating, Frascold Z40‑154Y |
| Nominal power | Approx. 40 HP |
| Displacement at 50 Hz | About 154 m³/h (nameplate value) |
| Nominal speed at 50 Hz | Around 1450 rpm (nameplate value) |
| Supply voltage (50 Hz) | 380–420 V, 3‑phase |
| Supply voltage (60 Hz) | 440–480 V, 3‑phase |
| Max operating discharge pressure | 30 bar (nameplate) |
| Max static suction pressure | 20.5 bar (nameplate) |
| Country of manufacture | Rescaldina, Italy |
Copeland-15hp
The photos show a Copeland condensing unit on a steel base, with a semi‑hermetic compressor, air‑cooled condenser and vertical liquid receiver designed for cold room applications. This type of refrigeration unit is widely used in…
| Item | Typical Copeland data |
|---|---|
| Compressor type | Scroll or semi‑hermetic reciprocating, multi‑refrigerant, high efficiency. |
| Application range | Medium and low temperature, roughly from +12 °C down to around −40 °C depending on model. |
| Capacity range | Models sized for commercial cold rooms, freezers and display cases of various volumes. |
| Condenser | Quiet axial fans, available in standard or high‑ambient “tropical” versions. |
| Options | Digital Scroll capacity modulation, electronic controls, liquid line components and safety devices pre‑assembled. |
FFI10HAK-FFI10HAKW
The Embraco FFI10HAKW is a hermetic reciprocating compressor designed for low and medium back pressure refrigeration systems operating on R134a. It runs on 220–230 V, 50/60 Hz single‑phase power and delivers roughly 1/3 HP from…
| Specification | Value (typical) |
|---|---|
| Model | FFI10HAK / FFI10HAKW |
| Compressor type | Hermetic reciprocating, on‑off |
| Displacement | 9.04 cm³ |
| Voltage / phase / freq. | 220–230 V, 1~, 50/60 Hz |
| Refrigerant | R134a |
| Application range | L/MBP (Low & Medium Back Pressure) |
| Motor type | RSIR/CSIR, LST starting torque |
| Nominal motor power | ≃ 1/3 HP |
| Cooling capacity at −10 °C evap., +45 °C cond. | ≃ 401–510 W (EN12900) |