6.Using the counter hold wrench to hold the fitting in place and the water hose fitting wrench to tighten the water hose (both wrenches are included with your original MCS unit), connect the In and Out water hoses to the heat exchanger unit.
7.Connect the temperature sensor connector to the heat exchanger unit.
8.Replace the air deflector plate ("Replacing the air deflector plate" on page 34).
9.Replace the fan unit ("Replacing the fan unit" on page 52).
Complete the operation checklist (on page 111).
Heat exchanger unit (HEX) with ball valve
The three heat exchanger units are located on the front of the MCS unit.
Removal and replacement procedures 67