Tecnomac T 93 E H2 User manual

AUT
MAX
AUT
MAX
Cod. 71503070/0 - 12/97
OUR SYSTEMS CONFORM TO EC STANDARD 73/23 CEE - 89/336
INSTRUCTION MANUAL
GB
STEAM HUMIDIFIERS
T 93 E H2
T 97 E H3

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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
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MACHINE USER IS SVERELY PROHIBITED
FROM CARRYING OUT THE OPERATIONS
MARKED WITH THIS SYMBOL

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1. GENERAL FEATURES ON STEAM HUMIDIFIERS
FUNCTION LOGIC
It is possible to create a flow of electric current
by simply applying tension to two electrodes
immersed into a water container. This makes
the water boil. In fact, water containing just a
very small quantity of salts, behaves as if it
were an electric resistance and closes the cir-
cuit between the two electrodes.
MAIN PARTS
Any steam requirement is controlled by the
electronic controller (R). It energises thecon-
tactor to supply power to the immersed elec-
trodes. Steam production is indicated on the
control display and the absorbed energy is
controlled by the current transformer (TAM).
When steam production drops below the set
value following a decrease of water level, the
controller instructs the solenoid valve (C) to fill
the charge tank (V) so as to allow water to flow
into the boiler by gravity.
The fill tank has two electrodes which measure
the conductivity of the feed water.
The ensures the best operation of the humidifi-
er in relation to the chemical characteristics of
the feeding water. On the top of the cylinder
there are two small high level electrodes (E):
they measure the water level and if it exceeds
the maximum selected value, water is dis-
charged through the relative discharge pipe.
The controller will instruct the drain solenoid
valve (S) to open/close on the basis of the
feeding water chemical characteristics. This
serves to maintain the best concentration of
salts within the cylinder and ensures the cor-
rect functioning of the humidifier.
(fig. 1 e 2)
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
ELECTRONIC CONTROLLER
The compact OEM humidifier is equipped with
the new microprocessor-based controller CDA
303.
The controller has a current transformer as well
as the operative contacts for the single-phase
function mode.
TECHNICAL CHARACTERISTICS
T 93 e H2 T97 e H3
Production Kg./h 3 3
Electrical absorption amper 9,9 3,3
Power kw 2,17
Feeding current 220/V/50 HZ 380/V/50 HZ
Monophase xxxxxxx

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2. SETTING UP
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THIS PROCEDURE MAY ONLY BE DONE
BY AN AUTHORISED TECNOMAC
INSTALLATION TECHNICIAN
Setting up the humidifier requires hydraulic
connections tho the fill and drain valve.
FEEDING PIPE
The feeding water will be conveyed from the
water-gate valve and pipework (min.) 6 mm.
internal diameter.
Please Note that pressure ranges between 1
and 10 bars. In case of higher pressure values
it will be necessary to use a pressure reducer
set at 3-4 bars. The feeding water temperature
must not go above 50°C.
IMPORTANT: Use water coming from the
city water mains. DO NOT USE TREATED
WATER (demineralized, soft, deionized
water).
If the feeding water contains dirt or impurities,
it is advisable to use a filter to improve the
quality of water. There is a series of water filters
available, forfiltering particles from 1 to 5 µm.
For further information please contact
Tecnomac Service.
3. START-UP PROCEDURES
HUMIDIFIER START-UP
The humidifier can be started after having car-
ried out the necessary connections (hydraulic
and electric) and after having connected it to a
humidistat, regulator or probe.
The humidifiers are started by pressing the
switch.
Wait just a few seconds for the initial test to
take place.
After that:
THE CONTROLLER WITH LEDSs AND
PUSHBUTTONs will:
turn ON the capacity led indicators.
Tecnomac garantees the working of its own
humidifiers only if they are connected to the
water network (not softned, not be, ineralised,
not treated with any kind of thing) with conduc-
tivity between 125 and 1250 µS/cm.
There are two different starting procedures,
depending on the water conductivity:
FEEDING WATER WITH CONDUCTIBILITY
HIGHER THAN 750 µS/cm.
The humidifier reaches full efficiency immedi-
ately, adjusting water flow to the cylinder to
provide the value of current necessary to pro-
duce the required steam quantity.
FEEDING WATER WITH CONDUCTIBILITY
FEEDING PIPE
Min. internal dia. feeding pipe (mm)
Mains pressure (bar)
Max. capacity feeding water (I/min)
Feeding water temperature
Feeding water connection
DISCHARGE
Discharge water connection (mm)
Min. dia. discharge pipe (mm)
STEAM CONVEYANCE
Pipe diameter (mm)
6
1-10
0,6
50°C
3/4” G(M)
30
3/4” G(F)
25
T 93 E H2 - T 97 E H3

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LOWER THAN 750 µS/cm.
The humidifier gets to the real working level
slowly, as it takes some hours (sometimes
some days) to make the water evaporate as to
concentrate the salts inside of the cylinder, so
the water can get to a conductivity higher than
750 µS/cm.
SWITCH > AUTOMATIC POSITION (AUT)
SWITCH > AUTOMATIC POSITION (MAX)
IMPORTANT
(fig. 8)
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 Lev Control 2.
In “MAX” position it always supplied the maw.
water vapour delivery.
Note: The “MAX” position must be used
only during the manual leavening phase.
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THE USER MUST NOT INTERVENE SHOULD ANY OF THE FOLLOWING MACHINE MAL-
FUNCTIONS 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
4. PERIODIC MAINTENANCE
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THIS PROCEDURE MAY ONLY BE DONE
BY AN AUTHORISED TECNOMAC
INSTALLATION TECHNICIAN
STEAM BOILER UNIT
Maintenance is advisable any time you the
humidifier after a long period of inaction or
when the “worn-out cylinder” alarm appears. In
such a case it is necessary to remove and
replace the cylinder, the only component sub-
ject to deterioration. If the humidifier operates
particularly with hard or aggressive water, it
should be necessary to substitute the cylinder
more frequently. Don't use decalcifiers or any
type of acids to wash the cylinder, as to avoid
the corrosion of the internal parts.
Remove the cylinder as follows:
– Empty the cylinder, draining water through
the “DR” key;
– Power supply OFF;
– Disconnect the steam pipe from the cylinder;
– Disconnect the electric connections to the

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main electrodes;
– Remove the plugs from the high level elec-
trodes;
– Remove the fixing bracket to free the cylin-
der;
– Lift the cylinder and remove it.
Before replacing it:
– Check that the gasket between cylinder and
drain section is in good conditions;
– Replace the cylinder and follow the indication
above, starting from the last point.
IT IS RECOMMENDED TO COMPLETELY
EMPTY THE CYLINDER ANY TIME THE
HUMIDIFIER WILL REMAIN INACTIVE FOR
LONG PERIODS.
FILL AND DRAIN SOLENOID VALVES
– Disconnect the power supply leads;
– Remove the fill/drain solenoid valve;
– Remove any possible salt deposits under a
jet of water;
– Check the conditions of the flow sensor with-
in the fill solenoid valve: don’t use com-
pressed air as to avoid damages to the flow
regulator;
– Refit the valves and power the humidifier.
DRAINAGE AND STEAM
CONVEYANCE PIPINGS
These pipes may get damaged because of the
high temperatures they undergo during normal
function of the humidifier. Please check period-
ically their conditions and - if necessary -
replace them.
NOTE: ALL THE MAINTENANCE HAS TO BE
DONE AFTER DISCONNECTING THE HUMIDI-
FIER.