Common Questions Is the SA159-17 compatible with both steam and hot water boilers

ensuring no impedance mismatch

1 Grade B accuracy (±3/2/3%) that technicians depend on during system diagnostics and preventative maintenance

As a manual reset spill switch

Johnson Controls A28AA-37 Temperature Control Refrigerant Common Questions Is the SA159-17Temperature Control, Two Stage, 2 SPDT Switch Action, 120 208 240 277 Vac, 60 140 Degree Setpoint Range, 5 Degree Differential Each Stage, 2 7 Degree Adjustable Differential Between Stages, 3 8" x 4" Bulb, 6' Capillary Length, Knob Range Adjuster A28AA 37 is identical to A28AA 37C