9.Open the ball valves on the hose assemblies.

10.Confirm that water is flowing through the ball valve couplers, by touching the couplers. The couplers should be cold.

11.Replace the hose insulation over the couplers.

12.Replace the air deflector plate ("Replacing the air deflector plate" on page 34).

13.Replace the fan unit ("Replacing the fan unit" on page 52).

14.Complete the operation checklist (on page 111).

HEX coupling

The three HEX couplings are located at the rear of each HEX unit iinside the MCS unit.

The following tools are required for installation:

•T-25 Torx driver

•Water hose fitting wrench (included with your original MCS unit)

•Counter hold wrench (included with your original MCS unit)

•Flathead screwdriver

•Utility knife

Removal and replacement procedures 77