Component
Check Items
Maintenance Period
Monthly by user
3 months
6 months
1 year
Electronics
Check the condition of
contactors
X
Check electrical
connections
X
Check the operation of
controller
X
Check unit operation
sequence
X
Humidifier
Check steam hoses
conditions
X
Humidifier cylinder
Check humidifier cylinder
conditions
X
Electric heater
Check the operation of
the electric heater
X
Check the erosion of the
electric heater
X
Chilled water circuit
Check circuit for leakage
X
Check water (glycol) inlet
temperature
X
Check the operation of
the water regulating
valve
X
Check mixture glycol
level (if applicable)
X
9.2 Facility Fluid and Piping
Maintaining facility water and glycol quality is required throughout the life of the coolant fluid piping system. A coolant-fluid
maintenance program must be established that will evaluate fluid chemistry and apply necessary treatment. The
complexity of water/glycol solution condition problems and the variations of required treatment programs make it
extremely important to obtain the advice of a competent and experienced water-treatment specialist and follow a
regularly-scheduled coolant-fluid system-maintenance program.
9.3 Glycol Solution
It is difficult to establish a specific schedule of inhibitor maintenance because the rate of inhibitor depletion depends upon
local water conditions. Analysis of water samples at the time of installation and through a maintenance program should help
to establish a pattern of depletion. A visual inspection of the solution and filter residue is often helpful in judging whether
active corrosion is occurring.
9 Maintenance
58
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual
