Vertiv Liebert PDX - Humidifier Start-up, Operation, and Maintenance

A - 3
Enclosure A - Electrode Humidier
Liebert
®
PDX, EconoPhase Version - UM - 265133 - 29.08.2019
A.3 - Start - up and operation
A.3.1 - Start - up
Before using the humidier, check the following:
• Supply and drain connections.
• That the cut- o󰀨 tap is open.
• All wiring.
• Earthing.
• Steam hose connection between steam cylinder and distributor.
To start the humidier simply switch on the air conditioner, which will in turn automatically start and stop the humidier as required. The
(adjustable) parameters which determine humidier operation have already been factory- preset (see iCOM manual).
A.3.2 - Operation
Water contains even a small quantity of salts in solution, is a conductor of electricity. Therefore, if the steam cylinder is lled with water
and a potential di󰀨erence is applied between the electrodes, the water behaves like an ordinary electrical resistance and becomes hot,
thus creating steam.
The steam production rate can be controlled by varying the water level in the cylinder; the higher the water level, the deeper the electrodes
are immersed into it and the greater the steam production.
Note 1
In case of low water conductivity consult HPAC Technical Sales Support.
Note 2
When starting with an empty cylinder, the water conductivity is normally insu󰀩cient for the HUMIDIFIER STEAM OUTPUT to be reached
immediately.
Therefore the humidier produces as much steam as possible to ll the cylinder completely. Any evaporation water is immediately relled.
The drain valve is kept shut and therefore, as the steam does not contain any salts, the conductivity of the water within the cylinder slowly
increases until the HUMIDIFIER STEAM OUTPUT is obtained.
The length of the start- up period depends upon the water conductivity. For very conductive water it may occur that the HUMIDIFIER
STEAM OUTPUT is obtained immediately.
A.4 - Maintenance
Important: the cylinder may be hot. Let it cool down before touching it or use protective gloves.
A.4.1 - Cylinder replacement
• Completely drain the water contained in the cylinder;
• Turn the appliance o󰀨 and open the disconnect switch on the mains power line (safety procedure);
• Remove the steam hose from the cylinder;
• Disconnect the electrical connections from the top of the cylinder;
• Release the cylinder from the fastening device and lift it up to remove it;
• Fit the new cylinder in the humidier by performing the previous operations in reverse.
A.4.2 - Cylinder maintenance (see cylinder instruction sheet)
The life of the cylinder depends on several factors, including: the complete lling with lime scale and/or the partial or complete corrosion
of the electrodes, the correct use and sizing of the humidier, the output and the quality of the water, as well as careful and regular
maintenance. Due to the aging of the plastic and the consumption of the electrodes, even an operable steam cylinder has a limited life
and it is, therefore, recommended to replace it after 5 years or 10,000 operating hours.
Important: the humidier and its cylinder contain live electrical components and hot surfaces, and therefore all service and/or maintenance
operations must be performed by expert and qualied personnel, who are aware of the necessary precautions.
Before performing any operations on the cylinder, check that the humidier is disconnected from the power supply; carefully read and
follow the instructions contained in the humidier manual. Remove the cylinder from the humidier only after having drained it completely.
Check that the model and the power supply voltage of the new cylinder correspond to the one being replaced.
A.4.3 - Periodical checks
• After one hour of operation: for both disposable and openable cylinders, check that there are no signicant water leaks.
• Every fteen days or no more than 300 operating hours: for both disposable and openable cylinders check operation, that there are
no signicant water leaks and the general condition of the casing. Check that during operation there are no arcs or sparks between
the electrodes.
• Every three months or no more than 1000 operating hours: for disposable cylinders,check operation, that there are no signicant
water leaks and, if necessary, replace the cylinder; for openable cylinders, check that there are no markedly blackened parts on the
casing: if this is the case, check the condition of the electrodes and, if necessary, replace them together with the O-rings and the
cover gasket.
• Annually or no more than 2500 operating hours: for disposable cylinders, replace the cylinder; for openable cylinders check operation,
that there are no signicant water leaks, the general conditions of the container, check that there are no markedly blackened parts
on the casing; replace the electrodes together with the O- rings and the cover gasket.
• After ve years or no more than 10,000 operating hours: for both disposable and openable cylinders, replace the cylinder. After
extended use or alternatively when using water with a high salt content, the solid deposits that naturally form on the electrodes may