Scenario summary
A restaurant group commissary serving 15-50 outlet restaurants prepares bulk components centrally: stocks, sauces, marinades, par-cooked proteins, prepped vegetables, dressings. Production runs in gastronorm hotel pans (GN1/1, GN2/1, GN1/2) that move through cookery → blast-chill → portioning → outlet distribution. A medium commissary cycles 300-800 GN-pan wash events per day in the wash bay.
Manual washing of a commissary GN pan with set-on sauce reduction takes 75-100 seconds per pan. The PTW-1900 handles 30 GN pans per 6-min cycle = 12 seconds per pan equivalent, with documented 82°C HACCP-aligned sanitization and PLC cycle logging.
Why commissary GN washing has specific operational pressures
- High-volume cook-chill production — commissaries produce concentrated batches (200-400 outlet-portions per GN1/1) requiring sanitization between batches
- Outlet-specific dietary requirements — restaurant group with allergen-aware menus needs documented segregation; commissary is the upstream control point
- HACCP critical control point — the wash between cook-chill cycles is a CCP requiring documented evidence
- Cross-outlet contamination prevention — same GN inventory cycles between Italian outlet, Asian outlet, BBQ outlet. Cross-flavour/cross-allergen control is a brand-quality issue
- Distribution timing — commissary outputs must hit the morning delivery window; wash bay throughput is on the critical path
Recommended PTW-1900 configuration
- Electric 70 kW version — typical commissary infrastructure
- GN-pan rack accessory — holds 30 × GN1/1 or 20 × GN1/1 + 10 × GN1/2 in tilted orientation
- Heavy cycle PLC profile — for cook-chill GN with set-on sauce residue
- Stored “Outlet Segregation” PLC profile — 90-second 85°C clean rinse between outlet/dietary cohort batches
- Barcode scanner — scan batch ID before loading; PLC logs batch + cycle parameters for HACCP traceability
- MES integration — Modbus RTU output of cycle data into the commissary’s production-planning system
- SUS316 chamber upgrade recommended for commissaries with high-acid menus (Italian, Mediterranean, Latin)
Throughput sizing
| Commissary scale | Daily GN-pan events | Capacity |
|---|---|---|
| Small (5-10 outlets) | 80-200 | Easy headroom |
| Medium (15-30 outlets) | 200-600 | Comfortable single machine |
| Large (30-50 outlets) | 600-1,200 | Single + peak buffer |
| Very large (>50 outlets) | 1,200+ | Dual machines |
ROI for a 30-outlet restaurant group commissary
- Labour displaced: 5 operators × 6 hours/day × USD 20 × 312 working days = USD 187,000/year
- GN pan inventory reduction — 30% faster turnaround = USD 18,000/year amortization
- Sanitizer chemicals eliminated = USD 8,400/year
- Outlet-level allergen-incident avoidance — single allergen-related guest reaction costs USD 25K-500K legal + PR
- Distribution window compliance — eliminating wash-bay bottleneck protects on-time outlet delivery; estimated USD 25K/year in avoided outlet expediting
Combined with sheet pan + trolley + utensil workflows, payback under 14 months.
Common commissary FAQ
Q: We have an Italian outlet (tomato/lemon-heavy) and an Asian outlet (soy/oyster-heavy). Same GN inventory acceptable? A: Yes, with Outlet Segregation profile between outlet-batch runs. Standard practice. The 85°C clean rinse + standard wash sequence is HACCP-documented cross-contamination control.
Q: Our commissary serves a kosher outlet with strict utensil/pan segregation. Compatible? A: Kosher dining requires dedicated equipment per cohort (dairy / meat / pareve). Each cohort uses its own labelled GN inventory; same PTW-1900 chamber handles all cohorts with appropriate stored profiles. Standard practice in kosher-certified commissary operations.
Q: Throughput during the morning delivery prep — 5 AM to 8 AM bottleneck? A: 3-hour window × 10 cycles/hour × 30 GN = 900 GN pan capacity. For commissaries with >900 GN morning throughput, plan staggered prep (run a portion overnight) or install a second machine.
Q: We’re upgrading from a hood-style dishwasher. Why roll-in? A: Hood-style at 18 GN/cycle × 4-min cycle = 270 GN/hour. PTW-1900 at 30 GN/cycle × 6-min cycle = 300 GN/hour. Similar throughput, but the PTW-1900 supports the documented sanitization PLC log that hood-style can’t. For HACCP-strict commissaries, the documentation is the determining factor.
Related reading
- Central Kitchen industry
- Rack washer for central kitchen — companion
- Trolley washer for hotel banquet kitchen — adjacent