Turns Open
1.5 hp Motor (60hz) 2.0 hp Motor (60hz)
Blower rpm External Static, in. Blower rpm External Static, in.
1 n/a n/a 1329 n/a
1.5 n/a n/a 1296 n/a
2 1037 0.9 1264 n/a
2.5 1005 0.7 1231 1.5
3 972 0.6 1199 1.4
3.5 940 0.5 1164 1.3
4 907 0.4 1134 1.2
4.5 875 0.3 1102 1.1
5 843 0.2 1069 1.0
5.5 810 0.1 1037 0.9
6 778 0.0 1005 0.7
Table 7.5 Evaporator external static pressure
Additional components such as a free-cooling coil, hot water reheat coil or high efficiency filters will
reduce available static pressure.
7.4.3 Piping Connections and Coolant Requirements
Drain Line
NOTICE
Risk of water backing up in the evaporator coil drain line and overflowing the drain pan. Can
cause building and equipment damage.
Do not install an external trap in the drain line. This line already has a factory-installed trap
inside the cabinet.
This line may contain boiling water. Use copper or other suitable material for the drain line.
A 3/4 in. (19.1 mm) NPT-female connection is provided for the evaporator coil condensate drain. This line
also drains the humidifier, if applicable. The drain line must be located so it will not be exposed to freezing
temperatures. The drain should be the full size of the drain connection.
The evaporator drain pan includes a float switch to prevent unit operation if drain becomes blocked.
The optional condensate pump kit is required when the evaporator is installed below the level of the
gravity-fed drain line.
Vertiv | Liebert Mini-Mate2—5 ton User Manual| 30
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