Glycol/GLYCOOL Cooled Models

5.4 Glycol Piping

! CAUTION

Galvanized pipe must not be used in or with systems or units that contain glycol. The phosphates in the inhibitor can react with the zinc in the galvanized pipe, precipitating an insoluble material that can eventually foul the system.

! CAUTION

To help prevent piping failures, supply and return lines must be supported in a way that keeps their weight from bearing on the piping of the unit, drycooler or pumps.

! CAUTION

To avoid the possibility of burst pipes, it is necessary to install a relief valve in the system. This valve may be obtained from the supplier as an option or obtained from another vendor.

! CAUTION

Fluid cooled condensers have small internal flow passages. To avoid clogging and other resulting system operation problems, install a 16-20 mesh filter in the fluid supply line to the indoor unit. The filter should be located where it can be easily serviced or replaced.

! CAUTION

Do not install unit on open loop systems. Debris carried by the fluid will clog the brazed plate condenser.

It is recommended that manual service shut-off valves be installed at the supply and return connec- tions to each unit. This enables routine service and/or emergency isolation of the unit. In addition, multiple pump packages require a check valve at the discharge of each pump to prevent back flow through the standby pump(s).

To facilitate filling, installation of hose bibs at the lowest point of the system is recommended.

Consideration of the minimum glycol temperature to be supplied from the drycooler will determine if the need exists to insulate the glycol supply and return lines. Insulation will prevent condensation on the glycol lines in low ambient conditions.

All fluid piping must comply with local codes. Care in sizing pipes will help reduce pumping power and operating costs.

Table 13 Room dew point temperatures

Dry Bulb

Wet Bulb

Relative

Dew Point*

°F (°C)

°F (°C)

Humidity

°F (°C)

 

 

 

 

70 (21.1)

57.2 (14.0)

45

48.0 (8.9)

70 (21.1)

58.5 (14.7)

50

50.5 (10.3)

72 (22.2)

58.9 (24.9)

45

50.0 (10.0)

72 (22.2)

60.0 (15.5)

50

52.4 (11.3)

75 (23.8)

61.2 (16.2)

45

52.4 (11.3)

75 (23.8)

62.5 (16.9)

50

55.0 (12.7)

* Minimum glycol temperature before condensation will occur.

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Liebert 3000 installation manual Glycol Piping, Room dew point temperatures, Dry Bulb Wet Bulb Relative Dew Point Humidity
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

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