Electrical power
Industrial freeze dryers are among the heavier electrical loads in a food plant: refrigeration compressors, vacuum pumps, and multi-zone shelf heating all draw significant power, sometimes simultaneously during parts of the cycle.
- Size the supply from the supplier's electrical drawings — installed capacity, voltage, phases, and recommended breaker/protection settings are model-specific.
- A dedicated circuit is standard practice: the dryer should not share a breaker with other heavy equipment.
- Plan for actual draw, but size for installed capacity: real-world running draw is typically around 60% of installed kW, but protection and cabling must cover the installed figure.
- Power quality matters: stable voltage protects the PLC control system (e.g. Siemens S7-200 based control) and compressor drives; discuss stabilizers or UPS for the control circuit if the site supply fluctuates.
The critical point: electrical upgrades can take months (utility applications, transformer lead times). Confirm supply adequacy before or immediately after ordering — this is the single most common cause of delayed startups.
Floor space and access
The machine footprint is only the starting point. A working installation needs:
- Service clearance: at least ~1 m on the sides where pumps, compressors, and panels need access for maintenance; more in front of the loading door for tray carts.
- Loading and staging area: room for tray carts, raw-material staging, and packed-product removal — freeze drying is a batch process with material flowing in and out every cycle.
- Floor strength and level: a level, reinforced concrete floor; confirm the loaded weight with the supplier.
- The delivery route: measure door widths, corridor turns, and ceiling heights from the unloading point to the final position. The chamber ships as a large welded assembly that does not disassemble — if it doesn't fit through the door, nothing else matters.
- Lifting equipment: confirm crane or forklift availability at delivery for positioning.
Water, air, drainage, ventilation
- Cooling water: refrigeration condensers need a cooling water circuit — confirm connection sizes, pressure, and flow/temperature requirements from the utility list.
- Defrost water and drainage: between cycles the condenser (cold trap) is defrosted, producing significant melt water. Provide a drain point near the machine sized for this intermittent flow — not a mop bucket.
- Compressed air: commonly used for pneumatic valves and seals; confirm required pressure and air quality (dry, oil-free) with the supplier.
- Ventilation and heat rejection: compressors and vacuum pumps reject heat into the room. In warm climates or enclosed rooms, plan ventilation or air conditioning so the plant room stays within the equipment's rated ambient range.
- Vacuum pump exhaust: route pump exhaust appropriately; oil-sealed pumps need exhaust handling per local practice.
Request the supplier's utility connection list (connection points, sizes, pressures, flows) before any civil works begin — retrofitting services under a positioned machine is expensive.
Reference: dimensions and power by model
Footprint and power — one model range
| Model | Shelf area | Dimensions (L×W×H) | Installed power |
|---|---|---|---|
| QS-FD-20 | 20.16 m² | 4500 × 1300 × 1400 mm | 35 kW |
| QS-FD-100 | 103.68 m² | 7000 × 4000 × 2300 mm | 135 kW |
| QS-FD-200 | 207.36 m² | 12000 × 4000 × 2300 mm | 135 kW |
- All models: SUS304 chamber, square chamber design, −60°C refrigeration, Roots + screw vacuum pump set.
- Allow service clearance and loading space in addition to the footprints above.
Specifications are for reference only and are subject to the final supplied equipment.
Site-preparation checklist
Work through this before the delivery date is set:
- Electrical supply confirmed: capacity, voltage, breaker sizing, dedicated circuit — from the supplier's electrical drawings.
- Floor prepared: level, reinforced, marked machine position.
- Cooling water, compressed air, and drainage connections installed and pressure-tested.
- Delivery route surveyed: doors, turns, ceiling heights, floor loading along the path.
- Lifting equipment booked for delivery day.
- Ventilation/cooling for the compressor and pump area confirmed.
- Commissioning support scheduled with the supplier; operators assigned for training.
- First raw materials and packaging ready so trial cycles can run immediately after commissioning.
Installation and commissioning
With utilities ready, the typical sequence is: mechanical positioning and leveling → service connections (power, water, air, drains) → vacuum leak checks → control system power-up and I/O checks → test cycles with real product → operator training → handover. Depending on machine size, this takes days to a few weeks.
The machine itself is rarely the bottleneck — site readiness is. Starting utility works when the order is placed (typical equipment lead time is around 3 months) keeps the project on schedule. Equipment is supplied with a 1-year warranty; confirm what commissioning support and documentation are included before signing.
For the sizing decision that precedes all of this, see the freeze dryer capacity buying guide; for what drives cycle length once you're running, see cycle time factors.
Frequently asked questions
How much power does an industrial freeze dryer need?
Industrial freeze dryers are among the heavier electrical loads in a food plant. A 20 m²-class machine draws around 35 kW installed; 100 m² and 200 m²-class machines are around 135 kW. Actual running draw is typically ~60% of installed capacity. A dedicated supply with appropriate protection, sized from the supplier's electrical drawings, is required — plan this early, as upgrading site supply can take months.
How much floor space does a freeze dryer need?
Beyond the machine footprint (roughly 4.5 m long for a 20 m² unit, 7–12 m for 100–200 m² units), allow 1 m or more of clearance on service sides, space for tray loading and product handling, and room for the defrost water drainage. Check door and corridor dimensions on the delivery route — the chamber ships as a large assembly.
Does a freeze dryer need water or compressed air?
Most industrial freeze dryers need a water connection for condenser cooling circuits and for defrosting between cycles, plus a drain point for defrost water. Compressed air is commonly used for pneumatic valves and door seals. Confirm exact connection sizes and flow rates from the supplier's utility list before civil works begin.
What site preparation should be done before delivery?
Before the machine arrives: confirm the electrical supply and breaker sizing, prepare a level reinforced floor, complete water/air/drain connections, verify the delivery route (door widths, corridor turns, lifting equipment), and ensure ventilation for the compressor and vacuum pump area. Commissioning goes far faster when utilities are tested before the machine lands.
How long does installation and commissioning take?
With utilities ready, mechanical installation, vacuum leak checks, and commissioning with test cycles typically take days to a few weeks depending on machine size. The long pole is usually site preparation — electrical upgrades and civil works — not the machine itself, so start utilities planning as soon as the order is placed (typical equipment lead time is around 3 months).
Planning a freeze dryer installation?
Share your site conditions — we'll provide the utility list and layout guidance for the right model.
Specifications are for reference only and are subject to the final supplied equipment. Installation guidance is general information; always follow the supplier's installation manual, electrical drawings, and local codes. Electrical work must be performed by qualified personnel.