Vertiv Liebert HPM User Manual

A --- 3
English
Liebert HPM --- A/W/F/D/H
A.4 --- Start---up and operation
A.4.1 --- Start---up
Before using t he humidifier, check the following:
S Supply and drain connections.
S That the cut---off tap is open.
S All wiring.
S Earthing.
S Steam hose connect ion between steam cylinder and
distributor.
To start the humidifier sim ply switch on the air co nditioner,
whichwillinturnautomatically star t and stop the humidifier
as required. The (adjustable) parameters which determine
humidifier operation have already been factory---preset (see
iCom manual).
A.4.2 --- Operation
Water, provided it contains even a small quantity of salts in
solut ion, is a co nducto r of elec tricit y. Therefore, if t he steam
cylinder is filled with water and a po t ential difference is ap-
plied between the electrodes, the water behaves like an or-
dinary 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 insufficient for the HUMIDIFIER STEAM OUT-
PUT to be reached immediately.
Therefore the humidifier produces as much steam as pos-
sible to fill the cylinder completely . Any evaporation water is
imme diately refilled.
The drain valve is kept shut and therefore, as the steam doe s
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 t he water
conductivity . For very conductive water it may occur that the
HUMIDIFIER STEAM OUTPUT is obtained immediately.
A.5 --- Maintenance
A.5.1 --- Removing the steam cylinder
To remove the steam cylinder, proceed as follows (see
Fig . c):
1) Open the General Switch relative to the humidifier.
2) Drain all the water from the cylinder by activating ”HUM.
DRAIN” in the CONTROL Service menu several times
(see Control manual).
3) Disconnect the steam hose (S) (made of non---conduct-
ive rubber).
4) Disconnect the power electrode wires (P) and level
sensor wire (L).
5) Undo the clip (R).
6) Pull the cylinder (C) out of its gland at the bottom (G).
A.5.2 --- Replacing the steam cylinder
When the steam cylinder is approaching the stage where it
needs to be replaced, warning A25 is generated (see Con-
trol manual) t o advise the user t hat the cylinder must be re-
placed. To replace the cylinder, proceed as follows (see
Fig . c):
1) Carry out the instructions in para. A.5.1.
2) Using the new cylinder, carry out 4)--- 6) of para. 5.1 in re-
verse order.
3) Connect the steam hose (S); the clip on the hose needs
to be tightened only slightly.
4) Manually switch the humidifier on for 2---3 minutes (in the
iCom Service menu). Then switch it off.
5) Drain the water as for 2) in para. A.5.1.
6) If the air conditioner features a iCom CDL with Graphic dis-
play, reset the humidifier working hours (window no. 1 of
PARAMETER MENU)tozero.
7) Close the General Switch relative to the humidifier.
A.5.3 --- Annual maintenance
Annually (e.g. before any close---down period) carry out the
following service on the humidifier (see Fig. c):
1) Carry out the instructions in para. A.5.1.
2) Disconnec t the supply (F) and drain (D) valve wires.
3) Unscrew and remove the drain tank (T).
4) Unscrew the drain valve assembly screws (V).
5) Remove the drain valve assembly.
6) Unscrew and remove the drain valve solenoid (O).
7) Unscrew and remove the drain valve armature (D).
8) Clean all parts of the drain valve using a commercially
available descaling agent (to remove any incrust ations).
9) Detach the hose from the supply valve.
10) Remove the supply valve connection (N).
11) Unscrew the supply valve (F) and remove it.
12) Clean the supply valve using a jet of water.
13) Replace any hose which has become hard and brittle.
14) Thoroughly flush the drain line (E).
15) Reassemble the humidifier by carrying out the above in-
structions in reverse order.
ATTENTION
Always empty the cylinder completely before any close---
down period.

Vertiv Liebert HPM Specifications

General

Brand	Vertiv
Model	Liebert HPM
Category	Freezer
Language	English