Machine Room Layout Principle, Ventilation, Heat Load & Fire Separation Design

Machine Room Layout Principle, Ventilation, Heat Load & Fire Separation Design

Refrigeration machine room concentrates compressor rack, receiver, control cabinet; layout determines safety, maintenance and stability. Core layout rules: reserved maintenance space around each unit, clear access channel, separate electrical area and refrigerant vessel area. Machine room heat load comes from compressor power loss, condenser heat radiation, electrical cabinet heat; ventilation must remove surplus heat. Air cooled condenser is often placed outdoor; if installed inside machine room, strong forced ventilation is mandatory to avoid hot accumulation. Refrigerant safety zoning: natural refrigerant such as CO₂ requires gas detector and forced exhaust fan interlock. Fire separation: machine room separate from cold storage and office; fire door, fire barrier comply with local building code. Pipeline arrangement: suction line at upper layer, liquid line middle, drain and cable at lower layer; label each circuit clearly. Control cabinet position: avoid direct radiation from compressor and condenser, reduce high temperature impact on electric components. Emergency facilities: emergency stop button, gas alarm, exhaust fan, eye wash station required for some export standards. Refrigeration maintenance & repair company reserves lifting space for compressor replacement in machine room early in design.

FAQ

1. Why reserve space around compressor rack? Convenient maintenance and component replacement.
2. What is the hazard if air cooled condenser placed indoors without strong ventilation? Hot air accumulation, high pressure trip.
3. What refrigerant needs gas detector and linked exhaust fan? CO₂ R744.
4. How to arrange pipeline layers in machine room? Suction line upper, liquid line middle, cable and drain lower.
5. Should machine room be separated from cold storage and office area? Yes, fire separation requirement.
6. Where to install emergency stop button? Visible and easy to reach position.
7. What affects service life of PLC and electric components? Long time high ambient temperature in machine room.
8. What space should be reserved for heavy compressor? Lifting hoist space.