Liebert 50 & 60Hz - Manual (Page 10)

Product Features
2
1.2 Optional Equipment
1.2.1 Canister Humidifier
The optional, factory-installed steam generating humidifier adds pure water vapor to the room air to
control humidity. Room humidity setpoints are established by the user. The humidifier components
include: a steam canister (replaceable), control board, inlet strainer, fill and drain valves.
1.2.2 Electric Reheat
The 304/304 stainless steel electric reheat is energized when required to heat room air or to control
room temperature during dehumidification. A safety switch prevents the reheat from exceeding tem-
perature limits.
1.2.3 SCR Electric Reheat
The 304/304 stainless steel reheat is pulsed rapidly to provide precise temperature control, while cool-
ing is locked on. A safety switch prevents the reheat from exceeding temperature limits.
1.2.4 Hot Gas Bypass (Condensing Units)
This optional system bypasses compressor discharge around the condenser directly to suction to pro-
vide capacity control and reduce compressor cycling. System includes liquid injection valve to main-
tain proper suction superheat. Hot gas bypass is provided on both circuits.
1.2.5 Free-Cooling Coil (GLYCOOL)
When ambient temperatures are low enough, cold fluid is piped to a secondary coil or a separate
source of chilled-water may be piped to this coil.
1.2.6 Smoke Detector
If smoke is detected in the return air, the unit display sounds an audible signal and the unit shuts
down.
1.2.7 Firestat
When the return air temperature limit of approximately 125°F (51.7°C) is exceeded, the unit shuts
down.
1.2.8 Filter Clog
If high pressure differential is detected across the return air filter, an adjustable pressure differential
switch sounds an audible signal.