Vertiv Liebert PCW - Power Supplies

G - 1
Enclosure G - Ultrasonic Humidier
Liebert PCW - UM - 273895 - 04.10.2018
G.1 - Ultrasonic Humidier
Ultrasonic Humidier operates on the principle of ultrasonic nebulization. A 48VAC voltage is rectied on an oscillator circuit and trans-
formed into a high frequency signal of 1.65MHz.
This signal is transmitted to a transducer installed in the water which then transforms the signal into high frequency automatic vibrations.
The built-in transducers - also called ”thickness transducers” - change their thickness 1.65million times per second in accordance with
the signal of 1.65MHz applied.
Ultrasonic Humidier can work only with demineralized water with conductivity < 5 μS/cm (up to 20 μS/cm for a short time).
If demineralized water is not available, provide demineralizer (not supplied).
Ultrasonic Humidier is controlled by a microprocessor-based electronic controller.
It includes control board, driver board and remote display board, all of them housed inside the humidier electrical panel, located behind
Liebert PCW right door.
The functioning logic of the Ultrasonic Humidier is PROPORTIONAL. The controller comes complete with DSP card which allows to
display and modify all the parameters of the humidier as well as to detect any abnormal condition via alarm messages.
For safety reason and in order to obtain optimum performance from the humidier, this manual and the HSU08RM000 manual must be
read carefully.
Tab. 1 - Ultrasonic Humidier specications
G.2 - Installation
The Ultrasonic humidier is supplied mounted within one base module 400 mm heigh.
The base module with humidier is supplied stand alone and it will be installed and connected with the air conditioner on eld.
The module can be installed on the raised oor, see g. 1, or in the raised oor, see g. 2 (front and bottom module opened, sides and
back module closed).
When installed in the raised oor it is necessary to remove the module frontal panel to have also frontal air delivery.
A base frame, available on request, is required to support ultrasonic humidier module.
Ensure 1 meter of free space (without obstacles) on ultrasonic humidier module outlet.
For Extended Height unit, connect the fan module above the humidier module and then the coil module above the fan module.
Connect humidier electrical cable, coming from the air conditioner, to the ultrasonic humidier.
Connect water supply, water drain, safety overow and humidier drain pan water drain.
The relevant piping connections shall be in material resistant to fully demineralized water.
Refer to HSU08RM000 manual for details.
Fig. 1 - Ultrasonic humidier module on the raised oor, frontal and lateral views
Humidier
Model
POWER SUPPLIES
(VAC)
SETTINGS
[kg/h]
NUMBER OF TRANSDUCERS
ABSORBED POWER
[W]
HSU08RM000 48 0…6.0 16 670