Emerson Liebert CRV User Manual Download Page 60

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Water Connections for Water/Glycol Units—600mm (24") Models

Liebert

CRV

™

7.0

ATER

ONNECTIONS

FOR

ATER

LYCOL

NITS

—600

(24") M

ODELS

NOTICE

Risk of internal system corrosion and frozen coolant fluid. Can cause equipment damage and

major fluid leaks resulting in serious building damage, expensive repair costs and costly

system down time.
Cooling coils, heat exchangers and piping systems that are connected to open cooling towers

or other open water/glycol systems are at high risk of freezing and premature corrosion.

Fluids in these systems must contain the proper antifreeze and inhibitors to prevent freezing

and premature coil, piping and heat exchanger corrosion. The water or water/glycol solution

must be analyzed by a competent local water treatment specialist before startup to establish

the inhibitor and antifreeze solution requirement and at regularly scheduled intervals

throughout the life of the system to determine the pattern of inhibitor depletion.
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.
Read and follow individual unit installation instructions for precautions regarding fluid

system design, material selection and use of field-provided devices. Liebert systems contain

iron and copper alloys that require appropriate corrosion protection. It is important to have

the system running with flow through exchangers maintained at initial system fill for 24 to 48

hours depending on size and system configuration.
Water chemistry varies greatly by location, as do the required additives, called inhibitors,

that reduce the corrosive effect of the fluids on the piping systems and components. The

chemistry of the water used must be considered, because water from some sources may

contain corrosive elements that reduce the effectiveness of the inhibited formulation.

Sediment deposits prevent the formation of a protective oxide layer on the inside of the

coolant system components and piping. The water/coolant fluid must be treated and

circulating through the system continuously to prevent the buildup of sediment deposits and

or growth of sulfate reducing bacteria.
Proper inhibitor maintenance must be performed in order to prevent corrosion of the system.

Consult glycol manufacturer for testing and maintenance of inhibitors.
Commercial ethylene glycol (examples are Dow Chemical Dowtherm SR-1 Union Carbide

Ucartherm and Texaco E.G. Heat Transfer Fluid 100), when pure, is generally less corrosive

to the common metals of construction than water itself. It will, however, assume the

corrosivity of the water from which it is prepared and may become increasingly corrosive with

use if not properly inhibited.

Table 26

Water connection options

Liebert CRV Option

Top Connections

Bottom Connections

Condensate Pump

and Humidifier

Available