Contents 4
Environmental specifications ........................................................................................................... 58
HP 642 1200mm Rack specifications ........................................................................................................ 58
Replaceable parts and maintenance and service information ........................................................... 59
Obtaining replaceable parts ..................................................................................................................... 59
Maintenance and service ......................................................................................................................... 59
Air and water heat exchanger maintenance ...................................................................................... 59
Water quality and leveling requirements, and condensation management ......................................... 60
Water quality requirements and specifications ............................................................................................ 60
Acceptable water quality specifications ............................................................................................ 60
Frost damage ................................................................................................................................ 61
Water precautions ......................................................................................................................... 61
Plumbing materials to avoid ............................................................................................................ 61
Leveling requirements ............................................................................................................................... 62
Condensation management ...................................................................................................................... 62
Support and other resources ........................................................................................................ 63
Before you contact HP .............................................................................................................................. 63
HP contact information ............................................................................................................................. 63
Customer Self Repair ............................................................................................................................... 63
Regulatory compliance notices ..................................................................................................... 71
Safety and regulatory compliance ............................................................................................................. 71
Acronyms and abbreviations ........................................................................................................ 72
Documentation feedback ............................................................................................................. 73
Index ......................................................................................................................................... 74
