Explosion-Proof Split Air Conditioners
Safe Air Conditioning in Hazardous Areas with a Wall-Mounted Indoor Unit and Explosion-Proof Outdoor Unit
Explosion-Proof Split Air Conditioners are ATEX-compliant split air conditioning systems used to safely control room temperature in industrial areas where explosive gas, vapour, or dust atmospheres may occur.
The combination of a wall-mounted indoor unit and an explosion-proof outdoor unit can be engineered to provide reliable 24/7 climate control in compact production areas, sensitive storage rooms, process control rooms, chemical facilities, oil and gas sites, and industrial plants.
ATEX Zone 2 / Zone 22
Provides an ATEX-compliant structure for safe climate control in hazardous gas and dust areas.
Compact Wall-Mounted Indoor Unit
The wall-mounted indoor unit saves floor space while providing targeted cooling.
24/7 Continuous Operation
Suitable for continuous operation in industrial spaces where critical temperature ranges must be maintained.
What Is an Explosion-Proof Split Air Conditioner?
An explosion-proof split air conditioner is a split air conditioning system whose indoor and outdoor unit components are adapted to hazardous area requirements for use in areas with an explosive atmosphere risk. In these systems, electrical components, cable connections, control elements, and the protective structures of the indoor and outdoor units are evaluated according to ATEX requirements.
The wall-mounted indoor unit saves floor space in compact areas and enables direct room cooling. The explosion-proof outdoor unit supports process safety through features such as corrosion resistance, low energy consumption, low sound levels, and BMS / DCS integration in industrial outdoor conditions.
Operating Principle of Explosion-Proof Split Air Conditioners
Indoor Air Intake
The wall-mounted indoor unit draws warm air from the room in a controlled manner.
Cooling Cycle
Heat extracted from the room is transferred to the outdoor environment through the outdoor unit via the refrigerant cycle.
ATEX Safety
Indoor and outdoor unit components operate in accordance with Zone 2 and Zone 22 hazardous area requirements.
Temperature Control
Critical room temperature is kept under control through a wired remote control or automation integration.
Key Technical Features
Product options suitable for ATEX Zone 2 and Zone 22 hazardous areas.
Wall-mounted indoor unit and explosion-proof outdoor unit combination.
Cooling capacity of 3.6–9.5 kW in wall-mounted models; cooling capacity of 2.6–25 kW in outdoor unit series.
Heating capacity ranges of 4.1–11.2 kW or 3.3–28 kW depending on the selected model.
Operating options in cooling mode for outdoor temperatures from -15°C to +50°C.
Integration capability with BMS, DCS, and industrial control systems.
ATEX Explosion Protection Technical Table
The following values are compiled from the indoor and outdoor unit explosion protection markings in the supplied ATEX split air conditioner documentation. :contentReference[oaicite:2]{index=2}
| Parameter | Technical Value | Description |
|---|---|---|
| EU Directive | 2014/34/EU (ATEX114) | ATEX directive for equipment used in explosive atmospheres. |
| Indoor unit gas marking | II 3G Ex h ic nAC IIB (+H2) T4 Gc | Indoor unit suitability in Zone 2 gas atmospheres. |
| Outdoor unit gas marking | II 3G Ex h nAC IIB T3 Gc | Outdoor unit suitability in Zone 2 gas atmospheres. |
| Indoor unit dust marking | II 3D Ex ic tc h IIIB T140°C Dc | Indoor unit suitability in Zone 22 dust atmospheres. |
| Outdoor unit dust marking | II 3D Ex tc h IIIB T150°C Dc | Outdoor unit suitability in Zone 22 dust atmospheres. |
| Applicable standards | EN 60079-0, EN 60079-11, EN 60079-15, EN 60079-31, EN 80079-36, EN 80079-37 | Electrical and mechanical equipment standards for explosive atmospheres. |
Wall-Mounted Explosion-Proof Split Air Conditioner Technical Table
The wall-mounted model documentation specifies cooling capacity ranges of 3.6–9.5 kW and heating capacity ranges of 4.1–11.2 kW. :contentReference[oaicite:3]{index=3}
| Technical Feature | Value / Description |
|---|---|
| Product type | ATEX wall-mounted split air conditioner indoor unit |
| Model range | PKA-M35, PKA-M50, PKA-M60, PKA-M71, PKA-M100 equivalent capacity classes |
| Cooling capacity | 3.6 kW – 9.5 kW |
| Cooling capacity | 12,280 – 32,400 BTU |
| Cooling RT | 1 – 2.7 RT |
| Heating capacity | 4.1 kW – 11.2 kW |
| Heating capacity | 13,980 – 38,200 BTU |
| Heating RT | 1.2 – 3.2 RT |
| Refrigerant | R32 |
Explosion-Proof Outdoor Unit Technical Table
The outdoor unit documentation includes cooling capacity of 2.6–25 kW, heating capacity of 3.3–28 kW, R32 refrigerant, and optional R410a retrofit information. :contentReference[oaicite:4]{index=4}
| Technical Feature | Value / Description |
|---|---|
| Product type | Explosion-proof outdoor unit split air conditioning system |
| Capacity classes | AC026, AC035, AC052, AC071, AC100, AC120, AC140, AC180, AC250 equivalent capacity ranges |
| Cooling capacity | 2.6 kW – 25 kW |
| Heating capacity | 3.3 kW – 28 kW |
| Operating range | Cooling: -15°C / +50°C, Heating: -20°C / +24°C |
| Refrigerant | R32, optional R410a retrofit |
| Power supply | 1 Phase, 220–240V, 50/60Hz |
| Outdoor unit dimensions | 790×548×285 mm, 880×638×310 mm, 880×798×310 mm classes |
| Outdoor unit weight | 32.8 kg and 43.8 kg classes |
Optional Features
The documentation specifies options such as additional corrosion protection for marine environments, stainless-steel fasteners, an ATEX isolator switch, an ATEX-compatible junction box, a durable ATEX wired remote control, 50/60Hz upgrades, and R410a retrofit. :contentReference[oaicite:5]{index=5} :contentReference[oaicite:6]{index=6}
Applications
Application Note
When selecting an explosion-proof split air conditioner, the room heat load, indoor and outdoor unit capacity, zone classification, gas / dust group, temperature class, outdoor temperature, corrosion resistance, power supply, IP protection class, control type, and automation integration should be evaluated together.
Get Technical Support for Explosion-Proof Split Air Conditioner Selection
Explosion-proof split air conditioner selection should be based on cooling capacity, intended room use, ATEX classification, outdoor conditions, corrosion level, and the control scenario.
You can request a project-based technical evaluation for split air conditioning solutions combining wall-mounted indoor units and explosion-proof outdoor units for Zone 2 and Zone 22 hazardous areas.
