This thermostat comes with five capillary mounting clips to ensure proper horizontal or vertical distribution of the sensing element across the coil surface

or 9-13 PSI operation to align with your controller's output

The A19ACA-14 features a -30 to 100 degree F setpoint range

which this 23mA unit is designed to eliminate

Common system issues include a restricted vent pipe

Lochinvar & A.O. Smith 100208501 Connection Board 30067439-890 This thermostat comes with fiveAs a seasoned technician, you know that a reliable low voltage control interface is the backbone of any first generation Lochinvar Knight boiler or A. O. Smith commercial water heater. The Lochinvar & A. O. Smith 100208501 Connection Board serves as the centralized wiring hub for vital field installed components. This genuine OEM board is a direct, pin to pin replacement for the Lochinvar RLY2202, ensuring seamless integration without the need for