Component Operation and Maintenance
Liebert
®
Challenger 3000
™
28
Autoflush Operation
The operation of the autoflush is divided into four steps, beginning with a call for humidification.
1. If the humidifier has not been activated for over 30 hours, the autoflush will flow water into the
pan for about 30 seconds. This will provide a minimum amount of water in the pan and prevent
heat damage to the humidifier pan. Humidifier lamps are Off.
2. If the humidifier has been activated within the last 30 hours,
is bypassed. The autoflush
will flow water into the pan for about 4 minutes. The humidifier lamps are On and the humidifier
is operational during this period. When the pan is filled (the fill cycle has timed out), the water
make-up valve is closed.
3. The water make-up valve remains Off and the humidifier lamps are On for a maximum of
9-1/2 minutes.
4. After the 9-1/2 minute delay, the autoflush adds water to the pan to replenish the water used in
humidification and flush the pan of mineral solids. This amount of water is adjustable from 110%
to 500% in increments of 10%. At the end of this cycle, the make-up valve is closed.
and
repeat as long as humidification is required.
Autoflush Controls
Use the LCD display, menu, and keys on the front control panel to program the autoflush controls.
3.7.3 Steam Generating Humidifier
Steam generating humidifiers are designed to operate in voltage ranges from 200 to 575 volts and
generate 11 pounds (5 kg) of steam per hour. These humidifiers operate efficiently over a wide range
of water quality conditions and automatically adjust to changes in the conductivity of water. The
humidifiers drain and refill to maintain an amperage setpoint and alert the operator when the
humidifier canister needs to be replaced. The humidifier is in the lower section of upflow units; it is in
the middle section of downflow units.
Figure 8
Steam generating humidifier
FOR
HISTORICAL
USE
ONLY
