Contents 4
Environmental specifications ........................................................................................................... 61
HP 642 1200mm Rack specifications ........................................................................................................ 61
Replaceable parts and maintenance and service information ........................................................... 62
Obtaining replaceable parts ..................................................................................................................... 62
Maintenance and service ......................................................................................................................... 62
Air and water heat exchanger maintenance ...................................................................................... 62
Water quality and leveling requirements, and condensation management ......................................... 63
Water quality requirements and specifications ............................................................................................ 63
Acceptable water quality specifications ............................................................................................ 63
Frost damage ................................................................................................................................ 64
Water precautions ......................................................................................................................... 64
Plumbing materials to avoid ............................................................................................................ 64
Leveling requirements ............................................................................................................................... 64
Condensation management ...................................................................................................................... 65
Support and other resources ........................................................................................................ 66
Before you contact HP .............................................................................................................................. 66
HP contact information ............................................................................................................................. 66
Customer Self Repair ............................................................................................................................... 66
Regulatory compliance notices ..................................................................................................... 74
Safety and regulatory compliance ............................................................................................................. 74
Acronyms and abbreviations ........................................................................................................ 75
Documentation feedback ............................................................................................................. 76
Index ......................................................................................................................................... 77
