The 51-S-2-HD is rated for a maximum vessel pressure of 35 PSI (2

it does not include manual override or setpoint adjustment dials

The unit is equipped with a 6-foot capillary for flexible sensing bulb placement and includes a reverse acting auxiliary contact to trigger alarm circuits or secondary indicators when the main contacts open

offering up to 95% efficiency and heat resistance up to 140°F

Precision Flow Control: The 3/4" NPT inlet and outlet provide optimal flow volume for high-capacity heating demands

Carrier HK44ER158 Control Module 30067439-890 The 51-S-2-HD is rated forCarrier HK44ER158 Control Module Blower Motor HK44ER158 is the direct replacement for RMOD44AE116