Vertiv | Liebert PEX4 | User Manual 33
Installation
2.5.1. Condensate Drain Piping Connection of the Indoor Unit
The condensate of Infrared humidier and evaporator is connected by a cross connector and drained through
the drain pipe, as shown in Figure 2-19. The pipe outer diameter is 25 mm. If the drain pipe is used by three or
more units, the minimal pipe outer diameter should be 40 mm.
When connecting the drain pipe, ensure that the ‘U’ bend is installed vertically and the ‘U’ shape is not
distorted, to ensure that the condensate can be drained immediately and eectively.
Because the Infrared humidier contains owing hot water, the water pipe must be resistant to heat higher
than 90 °C.
No. Description No. Description
1 From evaporated condensate water pan 3 Hose clamp
2 Condensate drain pipe connection 4 Plug
Figure 2-19 Connection of the Drain Pipe of Condensate Water
2.5.2. Humidication Inlet Pipe Connection
For the connection of water inlet pipe to the humidier select the nearest point to the unit. The material used
for the inlet pipe is galvanized pipe, aluminum plastic pipe, Ppr Hot-Melt pipe. And GI pipe is recommended.
• Infrared Humidier
Requirements for connecting the water inlet pipe of infrared humidier: To facilitate maintenance, an isolation
valve should be tted to the water inlet pipe. Ensure that the water inlet pipe is sealed properly to prevent
leakage. The infrared humidier reserves a copper pipe (OD: 6.35 mm), as shown in Figure 2-20. There is a 1/4”
copper nut at the end of the copper pipe followed with the 1/4” × 1/2” conversion copper thread connector,
which has been connected to the copper nut to avoid any loose contact.
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