Refrigeration Tech in Pictures

Commercial refrigeration one page at a time: medium and low temperature, walk-in coolers and freezers, evaporators, TXVs and EEVs, defrost systems, pressure controls, ice machines, reach-ins and troubleshooting.

Ductless mini-splits one page at a time: how they work, sizing and placement, mounting the indoor and outdoor units, line sets, perfect flares and torque, pressure test and evacuation, wiring, inverter basics, error codes and maintenance.

HVAC wiring one page at a time: the symbols, reading a ladder diagram, line and low voltage, thermostat wiring, contactors, relays and capacitors, the furnace control board, heat pump controls and troubleshooting with a meter.