Tecnomac T 98 E H4 Instruction Manual

Cod. 71503313/0 - 10/2000

OUR SYSTEMS COMPLY WITH EEC DIRECTIVE 73/23 - 89/336

INSTRUCTION MANUAL

STEAM HUMIDIFIERS

T 98 E H4

GB

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10

1. ELECTRICAL CONNECTIONS

2. WATER MAINS CONNECTIONS

3. MACHINE INSTALLATION

4. MACHINE TEST RUN

5. REPAIRING MACHINE COMPONENTS AND PARTS

6. DISASSEMBLY OF MACHINE AND/OR COMPONENTS

7. ADJUSTMENT AND SETTING PROCEDURES

8. MACHINE CLEANING AND MAINTENANCE
RELATIVE TO THE FOLLOWING PARTS AND COMPONENTS:
– ELECTRICAL
– ELECTRONIC
– MECHANICAL
– COOLING SYSTEM

WW

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AA

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MACHINE USER IS SEVERELY
PROHIBITED FROM CARRYING OUT THE
FOLLOWING OPERATIONS, AS WELL AS

THOSE MARKED WITH THIS SYMBOL.

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1. TECHNICAL CHARACTERISTICS

MODEL T98 EH4

NUMBER OF CYLINDERS BOILERS

TYPE OF CYLINDER BOILER

NUMBER OF STEAM ATTACHMENTS

AUXILIARY VOLTAGE

MAX. AUXILIARY ABSORPTION

TYPE OF CONTROL

AMPEROMETRIC TRANSFORMER TAM

THREE PHASE

1

E400TA

1

24/V50-60 Hz

30 VA

CDP

100

Kg/h

I

W

Kg/h

I

W

Kg/h

I

W

K

I

W

220 V

240 V

380 V

415 V

POWER
SUPPLY

VOLTAGE

8

8,8

5800

8
8

5800

OPERATING TEMPERATURE RANGE °C

FEED WATER PRESSURE

AIR DUCT PRESSURE

RESISTANCE/CONDUCTIVITY OF FEED WATER

0 - 40 °C

1 - 10 bar

200 mm H

2

0

800÷800Ω/125÷1250 µS/cm

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2. STEAM HUMIDIFIERS T98 EH4

PRINCIPLE
OF OPERATION

Applying an electrical current to two electrodes
submerged a container of water, there is a cir­culation of electric current between them
which increases the temperature of the water
to the boiling point.
Water, in fact, because it contains a minimum
quantity of salts, behaves as an electrical
resistance that closes the circuit between the
two electrodes.

OPERATION AND EQUIPMENT
PARTS

When the production of team is requested, the
electronic control applies current to the elec­trodes immersed in the water, closing the con­tactor.
The production of steam is controlled by mea­suring the current absorbed with an ampero­metric transformer. When it descends below
the required value following a lowering of the
water level, the feed valve is opened allowing
water to fill the feed tank from which it
descends, by the force of gravity, to the inside
of the cylinder.
The two small top level electrodes, positioned
at the top of the cylinder, control that the water
level does not supersede the maximum value.
Beyond this maximum value, water is dis­charged through the overflow pipe of the feed
tank.
The other two electrodes, positioned on the
feed tank, measure the conductivity of the
incoming water which is useful to the electron­ic control for maximum efficiency of the humidi­fier based on the chemical characteristics of
the water itself.
The discharge valve is activated by the control
unit and is frequency dependent upon the
characteristics of the incoming feed water
allowing it to maintain an optimal concentration
of salt within the cylinder.

A

V

E

T

B

C

S

V

E

B

R

S

C

T

V - Feed tank with electrodes for conductivity

measurement
E - Top level electrodes
T - Overflow pipe
B - Cylinder boiler
C - Feed valve
S - Discharge valve
R - Electronic control panel

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3. INSTALLATION

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THIS PROCEDURE MAY ONLY BE DONE

BY AN AUTHORISED TECNOMAC

INSTALLATION TECHNICIAN

WIRING

GENERAL RULES

– Check that supply voltage corresponds to

rated voltage of humidifier;

– when wiring, respect minimum values for

supply cable section as suggested in the
table below;

– Protect equipment with fuses or automatic

switches, preferably according to values
shown in table below.

MODEL T98 EH4

Instant max. capacity of intake water I./min.
Feed water attachment
Instant max. capacity of discharge water I./min.
Discharge water attachment (mm.)
Min. diam. of discharge piping

2,5

3/4” M

1,6

30

3/4”

4. START-UP

CONTROL PANEL

The control panel with the functions of humidity
regulation incorporated, offers additional func­tions and indicators as shown in figure:
Some of the indicators are simply displayd val­ues while others blink on and off when dis-

played and are parameters that may be modi­fied by the user (see section on modifiable
functional Iparameters).
A great number indicators are shown:

1) absorbed current

2) desired production Kg/h

3) unit configuration: visualisation of humidifi­er model, power supply voltage, number
of phases, nominal current, amperometric
transformer, control model, drainage under
tension or timed

4) alarms, pre-alarms

5) conductivity relative to feed water (*)

INDICATING LED

6) indicating led of water charge

7) indicating led of humidification ON

8) indicating led of water drainage

9) indicating led of alarm

BUTTONS

10) reset button

11) manual drainage button

12) button for selection of parameter to be dis­played

13) button for increase of displayed value

14) button for decrease of displayed value.

(*) The conductivity value display is a relative
value as it depends on temperature.

4

3

1
2

13

6

8

11

14

5

7

9

10

12

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START-UP PROCEDURES

Following installation and checking of all electri­cal and hydraulic connections, the unit may be
turned ON by pressing the green switch posi­tioned below the control panel.
The display will automatically position a triangu­lar cursor at the indicator for electric current.
Simultaneously, the relative values of the afore­mentioned parameters will be displayed.
When humidification is requested, the LED 7)
HUMIDIFY ON is turned ON and the control unit
fills the cylinder with water: the fill led (4) is also
turned on at this point. The operation proceeds
until the correct current value is reached. This
value dependes not only on the steam produc­tion imposed but on the conductivity of the feed
water measured by the two small electrodes
positioned on the filling cup as well.
Steam production is factory-set at 70% of maxi­mum production capacity.

START-UP WITH CONDUCTIVITY OF FEED
WATER SUPERIOR TO 1000 MICROSIEMENS

The humidifier reaches full efficiency immediate­ly, adjusting water flow to the cylinder to provide
the value of current necessary to produce the
required steam quantity.

START-UP WITH CONDUCTIVITY OF FEED
WATER INFERIOR TO 1000 MICROSIEMENS

The humidifier reaches full efficiency slowly
because it begins on “soft” cycle. This cycle
may last one hour dependent upon the conduc­tivity; it will proceed until the conductivity reach­es the projected value. If the scarcely con­ductible water reaches the top level electrodes
during the filling phase a prealarm (E05)
appears. It is followed by another prealarm
(E02) signalling reduced functionality if the con­ductibility remains low during successive fill­ings.
This pre-alarm may persist for a prolonged time
period in cases where conductivity is very low.
The aforementioned pre-alarms do not block the
functioning of the unit and they are turned off
automatically as soon as the conductivity within
the cylinder reaches projected values.
If the situation persist after numerous fillings
(particularly when the humidifier has been in
use for some time) it means that the cylinder
needs cleaning or replacement and on addition­al alarm (E08) will appear blocking the function­ing of the unit.

SETTING OF PARAMETERS

As already mentioned, some of the indicators
are only displayed values while others may be

modified by the user:

2) maximum steam production

3) drainage with electrodes whether under cur­rent or not.
Respositioning of the triangular cursor by using
the pushbutton 12) SEL, the indicators are dis­played in a clockwise manner in the following
order:

1) - 2) -3) - 4) - 5) - 1)
visualisation lasts for 30 seconds afterwich the
display returns automatically to the initial start
configuration, that is, either current or relative
humidity depending on the model.
In cases of modification of parameters, the
memorization of the new value must be made
within 30 seconds by pressing push-button 12)
SEL.

MAXIMUM STEAM PRODUCTION

Using push-button 12) SEL, position the cursor
at the indicator for max production. The value of
maximum steam production which had been
previously set is visualized and with pushbutton

13) and 14) this value may be either increased
or decreased.
Pressing pushbutton SEL a second time the
new value is memorized and the cursor is posi­tioned at the indicator 3) CONFIGURATION.

IMPORTANT:

SWITCH TO CHOOSE HUMIDIFICATION
POWER

In “AUT” position the system supplies 30% of
max water vapour delivery which is preset in
phases Iª and IIª of LevControl 1; Iª, IIª, IIIª of
LevControl 2. It supplies the max. water vapour
delivery in phase IIIª of LevControl 1 and in
phase IVª of LevControl 2.
In “MAX” position it always supplied the max.
water vapour delivery.

Note: The “MAX” position must be used only
during the manual leavening phase.

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WWWWAAAARRRRNNNNIIIINNNNGGGG!!!!!!!!!!

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THE USER MUST NOT INTERVENE SHOULD ANY OF THE FOLLOWING
MACHINE MALFUNCTIONS OCCUR.
IT IS OBLIGATORY TO CONTACT AN AUTHORIZED TECNOMAC
TECHNICIAN.

1. THE CONTROL PANEL IS NOT WORKING

2. THE HEATING SYSTEM IS NOT WORKING

3. IN ANY OTHER CASE OF IRREGULAR FUNCTIONING

5. ALARMS AND PRE-ALARMS

PRE-ALARM

Functions to advise the user via display or seri­al line, of particular situations regarding unit
functioning. The control continues to regulate
the production on steam compatible with the
newly signalled situation (alarm level, reduced
functionality, etc.) and verifies whether or not
the cuse of the prealarm has disappeared
and/or the production of steam may be allowed
the return gradually to the required value. On
the contrary, after a certain time an alarm is
signalled.
The pre-alarm consists of:
– visualisation on the display or eventual trans-

mission via serial line of the relative alarm
code.

ALARM

The alarm is activated following the duration of
a particularity of function, already signalled by
a prealarm, which does not allow the continua­tion of regular steam production (eg, cylinder
exhausted).
It may appear following a temporary situation
(voltage excess, lack of water, etc.) which
requires intervention of personnel.
The alarm consist of:

– visualisation on the display or eventual trans-

mission via serial line on the relative code;

– blocking of the humidifying function (reset is

automatic for E11 and E12 when relative

humidity returns within set limits);
– activation of alarm relay;
– lighting of alarm led 9)
– total draining of water (with the exception of

alarms E31, E32, E11, E12).

ALARMS - TROUBLE SHOOTING

The purpose of the following table is to help the
user to identify the cause of eventual malfunc­tions and to indicate the necessary procedure
in case of block in humidifier function.
By pressing the pushbutton 10) RESET follow­ing an alarm, the humidifier resumes activity. If
the cause of the alarm persists however, within
a short time the humidifier will stop again.
In any case it is advisable, before re-starting
the humidifier by pressing the 10) RESET but­ton, to consult the possible remedies suggest­ed in the following table in order to avoid
unnecessary loss of time or actions that may
damage the unit.

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6. MAINTENANCE

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THIS PROCEDURE MAY ONLY BE DONE

BY AN AUTHORISED TECNOMAC

INSTALLATION TECHNICIAN

Regular maintenance is limited to descaling or
replacing the boiler, together with annual
cleaning (generally done before seasonal
close-down).

CYLINDER BOILER CLEANING
AND REPLACEMENT

This is necessary when scale on the active sur­faces of the electrodes prevents the sufficient
passage of electrical current (alarms E08 and
E06).
To dismantle the cylinder boiler:
– drain water completely, by pressing MANUAL

DRAIN button 11) on the control panel;

– cut of power to the equipment by means of

switch or line fuses;

– remove steam pipe from the boiler;
– disconnect wiring to main electrodes and

unplug light level electrodes;
– unscrew fixing knob to free cylinder, lift boiler

to remove. The boiler may generally be used

again after descaling. Unscrew ring nut (see

figure) and extract bottom filter. Remove

scale and calcareous deposits under a jet of

water and clean grids mechanically or chem-

ically with a commercially available cleaner.

When electrode wear is such that regenera-

tion is insufficient, the boiler must be

replaced. Exchange only involves the body

of the boiler and the gasket. The ring nut,

connection piece and filer do not deteriorate

with use.
Reassemble the boiler in reserve sequence,
after, checking and if necessary the washer
between the threaded connection and the dis­charge group.

CLEANING AND SEASONAL
CLOSE-DOWN

Annually, or before summer close-down,
inspect and clean the systems. Drain water
from the boiler by pressing the MANUAL
DRAIN pushbutton 11) on the control panel
and cutting off power.
The following is Recommended:
– dismantle and wash water intake valve, and

check that intake filter is clean;
– dismantle drain group, cleaning conduits and

nozzles and removing and solids from the

base of the syphon;
– inspect water intake, drain, steam and con-

densation pipes, and replace them it they are

worn out or fragile.

5

4

1

3

2

1. RING NUT

2. CONNECTION PIECE

3. GASKET

4. FILTER

5. CYLINDER BOILER