HP 403349-003 - Manual (Page 59)

Removal and replacement procedures 59
Heat exchanger unit (HEX) with coupler
The three heat exchanger units are located on the front of the MCS unit.
You can replace the HEX units during operation.
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)
Removing the heat exchanger unit with couplers
NOTE: For this procedure, remove the fan unit seated directly behind the heat exchanger unit
you will remove.
1. Remove the fan unit (" Removing the fan unit " on page 51 ).
2. Remove the air deflector plate (" Removing the air deflector plate " on page 33 ).
NOTE: The heat exchanger units are deep-seated within the MCS unit. To access the
connections described in the following steps, extend your arm inside the MCS unit until you
come in contact with the appropriate connectors.