Item
Description
7
Continuousdownwardslope
8
External trap. Donot trapexternally.
9
External traps, althoughunintentional. Linesmust be rigidenoughnot tobow.
10
Internal drain
Table 5.3 Gravity-fed Drain Line Figure Descriptions (con-
tinued)
4.1.2 Condensate-pump Drain Line Requirements
NOTICE
Risk of water backing up inthe drainline. Leaking and overflowing water cancause equipment and building
damage.
Do not install anexternal trap inthe drainline. This line already has a factory-installed trap inside the cabinet.
Installationof a second trap will prevent drain-water flowand will cause the water to overflow the drainpan.
Sagging condensate drainlines may inadvertently create anexternal trap.
Observe the following requirements wheninstalling and routing the drainline:
•
Do not reduce drainlines.
•
The drainline must be located so it will not be exposed to freezing temperatures.
•
Size the piping based onthe available condensate head.
•
Drainis trapped internally. Do not externally-trap the drainline.
•
The drainline must be rigid enoughthat it does not sag betweensupports, whichunintentionally creates traps.
•
We recommend installing monitored, under-floor leak-detectionequipment.
Field-installed Condensate Pump
Inmost cases of units witha field-installed condensate pump, the unit ships from the factory withthe un-mounted
condensate pump inside the unit, withthe following exceptions:
•
Onupflowunits withbottom-return, the pump ships loose for field-installation.
•
OnCW038and CW060 units withEC fans, the pumps ships loose for under-floor field installation.
•
The unit has aninternally-mounted trap. The discharge (drain) line from the pump must comply withall
applicable codes.
4.1.3 Water Supply-line Requirements for the Optional Humidifier
The unit may have anoptional humidifier. Refer to the appropriate supply-line piping requirements if a humidifier is
included onyour unit:
Infrared Humidifier:
•
1/4-in. supply line, maximum water pressure is 150 psi (1034 kPa).
•
Size supply line for 1 gpm (3.8l/m), witha minimum water pressure of 20 psi (138 kPa).
•
Do not supply de-ionized water to the humidifier.
4 Piping Requirements
35
Summary of Contents for Liebert CW 038
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