Heatcraft PRO³ Startup Checklist: 9 Steps Before You Power On Your Mortuary Cooler

2026 packaged refrigeration systems reward a disciplined startup. Skipping steps risks water overflow, nuisance alarms, and warranty exposure. Here's the condensed sequence for the Heatcraft PRO³ on any AMC upright mortuary cooler — always defer to the full manual on our manuals and startup guide page.

The 9 steps

1. Inspect before signing. Check packaging and unit against the bill of lading; report damage to the carrier immediately.
2. Verify placement. Indoor units need 50–100°F ambient, 2 ft clearance above for service, ventilation, and nothing stored on top.
3. Never over doors. The evaporator section must not sit above doors or door openings, and airflow must cover the room.
4. Level check. Within 1° of level — no more than 5/8″ drop per 3 feet.
5. Connect the drain line to the drain port and add water to establish the P-trap liquid seal.
6. Confirm your drainage plan. High-humidity or extended-run sites should route the 3/4″ NPT external drain to a drainage source or condensate pump.
7. Power correctly. Dedicated grounded circuit only — no extension cords, no adapters, never remove the grounding prong.
8. Energize. Controls arrive preset to factory defaults on the Dixell XR40CH controller.
9. Verify operation — confirm pull-down to the 34–40°F set point and normal compressor cycling.

Why it matters in 2026

New low-GWP refrigerant platforms bring an extremely high-efficiency process with new drainage and startup requirements. AMC accepts no liability for a customer's failure to properly start up the new AW2 fully packaged plug-in units — read the documentation and call us with questions before ordering.