the MK-6621 features a replaceable neoprene diaphragm and an adjustable start point (±2 psig)

this 3-speed blower motor provides versatile performance characteristics to meet specific cooling and heating demands

Note that the guard rod length must be adjusted (Glass Length + 2") to ensure proper protection of the sight tube

which usually point to failing internal bearings or a cracked inducer wheel

and Comfortmaker outdoor units

Belimo AFBUP-S Actuator Refrigerant the MK-6621 features a replaceableThe Belimo AFBUP S Actuator is a heavy duty spring return damper actuator engineered for precise on off control in demanding HVACR environments. Providing a robust 180 in lb torque (20 Nm), this unit is designed to drive large control dampers or mechanical linkages in air handling units and ventilation systems. Its universal power supply allows for seamless integration across a wide voltage range, accepting AC 24 to 240 V or DC 24 to 125 V, which