Record what you have now
- Manufacturer, model, and serial number from the nameplate.
- Nameplate electrical data: voltage, phase, frequency, and current.
- Inlet and outlet connection sizes and thread type.
- Drain type (timed, float, zero-loss) and where condensate goes.
- Footprint, height, and clearance around the unit.
Ask whether the old dryer was the right size
If the shop added a larger compressor, more tools, or a new process since the old dryer was installed, a like-for-like replacement may be undersized from day one. Equally, if the old unit ran for years without moisture problems, its documented capacity is a reasonable reference point, as long as demand has not changed.
Questions for the seller or manufacturer
- What is the documented capacity at my inlet, ambient, and pressure conditions?
- Does the replacement use the same electrical supply as the old unit?
- Are connection sizes the same, or will I need fittings?
- What does the warranty cover, and who handles claims?
- Are filters, drains, or other parts available separately?
General guidance only, not engineering advice. Confirm sizing and installation with the manufacturer, an authorized distributor, or a qualified technician.