While optimized for Copeland Alco hardware
"Off" forces them open
Common Questions How do I know if my Lennox 79J21 ignitor is bad
such as pre-purge and post-purge cycles
this board simplifies heat pump troubleshooting by providing reliable timing intervals and robust terminal connections that maintain signal integrity in harsh outdoor environments
Johnson Controls A28KA-1 Temperature Control R-410A While optimized for Copeland AlcoJohnson Controls A28KA 1 Industrial Thermostat, Temperature Control, 120 208 240 Vac, Two Stage, Two SPDT Switches, 0 150 Degree Temperature Setpoint Range, 5 Degree Differential Each Stage, 3 Degree Fixed Differential Between Stages, . 29" x2 1 2 Sensing Bulb, 10' Capillary Length, Knob Range Adjustment, Watertight and Dusttight A28KA 1 is identical to A28KA 1C