Water Connections for Water/Glycol Units—600mm (24") Models
51 Liebert
®
CRV
™
7.1 Water Connections—Supply Humidifier and Drain Water
Units with a condensate pump and humidifier are preset to be connected from the top. If floor
connections are used, the water lines can be intercepted at the following points:
Figure 29 Water connection points, bottom entry
• Condensate drain without pump:
• Use tubing rated to carry water up to 212°F (100°C) copper, PVC or flexible polythene tubing.
• Allow a 2% gradient toward the drain.
• Drain is trapped internally. Do not trap the drain external to the equipment.
• Fill the drain trap with water.
• Humidifier (optional): See Appendix A - Humidifier—600mm (24") Units Only.
7.2 Glycol Mixture
Add ethylene glycol or propylene glycol to the circuit in the percentages shown in Table 28.
Table 28 Glycol mixtures
Glycol Percentage *
by Volume
Ethylene Glycol -
Freezing Temperature, °F (°C)
Propylene Glycol -
Freezing Temperature, °F (°C)
0% 32 (0) 32 (0)
10% 25.3 (-3.7) 28.9 (-1.7)
20% 16 (-8.9) 18.7 (-7.4)
30% 3.7 (-15.7) 8.4 (-13.1)
40% -12.6 (-24.8) -6.7 (-21.5)
* Freezing temperatures may vary slightly among commercially available glycol products; refer to manufacturer’s specifications.
Condensate
Pump Drain
Humidifier
Water Supply
To Next Page
Loading...
