Daikin-McQuay 668043001 Valve 321894-709 The Energy Cut-Off (ECO) is

The Energy Cut-Off (ECO) is a safety high-limit that breaks the electrical circuit if the water temperature reaches an unsafe level

Is the 4A-203-A2F compatible with older 4A-200 series assemblies

all of which are field selectable via onboard DIP switches

Expanded Outlet Design: A 2-inch expanded outlet reduces backpressure during discharge

Daikin-McQuay 668043001 Valve 321894-709 The Energy Cut-Off (ECO) isThe Daikin McQuay 668043001 Valve is an essential OEM thermostatic expansion valve (TXV) engineered for precision refrigerant metering in commercial HVAC systems. This specific 1 4" x 3 8" ODF expansion valve is designed as a direct replacement part for Daikin and McQuay equipment, commonly utilized in R22 refrigerant applications to maintain a constant superheat at the evaporator outlet. By regulating the pressure drop from a high pressure liquid to