Technical Specifications

Heat Rejection
121
6.13.3 Filling the System
Installation of hose bibs at the lowest point of the system is recommended.
When filling a glycol system keep air to a minimum. Air in glycol turns to foam and is difficult and
time-consuming to remove. (Anti-foam additives are available and may be considered.)
Open all operating systems to the loop. With the top vent(s) open, fill the system from the bottom of
the loop. This will allow the glycol to push the air out of the top of the system, minimizing trapped air.
Fill to approximately 80% of calculated capacity. Fill slowly from this point, checking fluid levels until
full.
6.14 Outdoor Control Enclosure
The Liebert Outdoor Control Enclosure is designed to be used with a Liebert condenser or drycooler to
control one or more pump and/or fan motors. The enclosure is rated NEMA 3R when installed as
shown in Figure 114.
Figure 114Liebert Outdoor Control Enclosure installed
NOTE
For glycol solution preparation and periodic testing, follow manufacturer’s recommendations.
Do not mix products of different manufacturers.
Table 52 Volume in standard Type "L" copper piping
Diameter (in.) Volume
Outside Inside gal/ft l/m
1-3/8 1.265 0.065 0.81
1-5/8 1.505 0.092 1.15
2-1/8 1.985 0.161 2.00
2-5/8 2.465 0.248 3.08
3-1/8 2.945 0.354 4.40
3-5/8 3.425 0.479 5.95
4-1/8 3.905 0.622 7.73