Express Chill Service Assembly Reference Guide This bulletin will identify which Express Chill Service Kit (Air Handler Assembly) is required for each model of the Monogram SxS refrigerator. It is very important to understand which engineering model is being serviced because each express chill service assembly will be different for each model. MODELS AFFECTED A Models ZIS360NXA ZISB360DXA ZISS360NXASS ZISS360DXASS ---------------------------------------------------------------