Pego EASYSTEAM Series User manual

Rel. 19
Use and maintenance manual
READ AND KEEP
REV. 02-21
ENG
IMMERSED ELECTRODES
HUMIDIFIERS
EASYSTEAM
ES-OEM-CCU

Page 2 Rev. 02-21
USER MANUAL
Thank you for choosing a PEGO EASYSTEAM ES-OEM-CCU immersed electrodes humidifier.
The complete reading of this manual will allow you to perform a correct installation and a better use
of the machine. It is therefore advisable to keep this manual in a place adjacent to the humidifier for
any maintenance operations or to modify its operation.
How to read the manual.
To facilitate reading, graphic indications have been inserted with the following meanings:
Indicates a note that require careful reading.
Indicates the operations to be scrupulously performed to avoid damage to the humidifier,
injury to persons or malfunctions.
Indicates the operations not to be performed to avoid damage to the humidifier, injury to
persons or malfunctions.
Indicates a suggestion.
Indicates to contact the PEGO after-sales service indicated on the back of this manual.
Instructions for disposal:
The humidifier is made up of metal parts and plastic parts. In reference to European Union directive
2012/19/EC issued on 4 July 2012 and the related national legislation, please note that:
A. WEEE cannot be disposed of as municipal waste and such waste must be collected and
disposed of separately.
B. The public or private waste collection systems defined by local legislation must be used. In
addition, the equipment can be returned to the distributor at the end of its working life when
buying new equipment.
C. The equipment may contain hazardous substances: the improper use or incorrect disposal of
such may have negative effects on human health and on the environment.
D. The symbol (crossed-out wheeled bin) shown on the product or on the packaging and
on the instruction sheet indicates that the equipment has been introduced onto the market
after 13 August 2005 and that it must be disposed of separately.
E. In the event of illegal disposal of electrical and electronic waste, the penalties are specified
by local waste disposal legislation.

Rev. 02-21 Page 3
USER MANUAL
INTRODUCTION
Page 5 1.1 Generality
Page 6 1.2 Warranty conditions
Page 7 1.3 Functioning principle
Page 9 1.4 ES-OEM-CCU Series humidifiers identification codes
Page 9 1.5 ES-OEM-CCU Series humidifiers technical data
Page 10 1.6 Overall dimensions
Page 10 1.7 Identification data
Page 10 1.8 Standard equipment
INSTALLATION
Page 11 2.1 Main installation warnings
Page 13 2.2 ES-OEM-CCU series sensors and control signals connections
Page 18 2.3 Digital inputs on HUM2 board
Page 19 2.4 Digital outputs on HUM2 board
Page 20 2.5 TA Inputs for measuring current absorption
Page 20 2.6 Net configuration with Modbus-RTU protocol
Page 20 2.7 Board power supply
Page 20 2.8 NANO EasySTEAM Display for Master HUM2 board
Page 21 2.9 ES-OEM-CCU series electrical layouts
Page 23 2.10 Installing the ES-OEM-CCU series humidifier
Page 25 2.11 ES-OEM-CCU series humidifier electric connections
PROGRAMMING
Page 26 3.1 NANO EasySTEAM controller description
Page 27 3.2 Combination of keys
Page 28 3.3 Status LED on Master HUM2 electronics
Page 29 3.4 1st Level programming
Page 30 3.5 2st Level programming
MASTER/SLAVE CONFIGURATION
Page 35 4.1 Individual humidifier configuration
Page 35 4.2 Master/Slave humidifiers configuration
IGNITING THE HUMIDIFIER
Page 38 5.1 First ignition
Page 38 5.2 Steam production
Page 38 5.3 Smart production for low conductivity
DIAGNOSTICS
Page 39 Diagnostics
TABLE OF CONTENTS
CHAP. 1
CHAP. 2
CHAP. 3
CHAP. 6
CHAP. 4
CHAP. 5

Page 4 Rev. 02-21
USER MANUAL
MAINTENANCE
Page 43 7.1 Maintenance
Page 43 7.2 General and safety Standards
Page 43 7.3 Maintenance intervals
Page 45 7.4 Replacement of the cylinder
Page 47 7.5 Cleaning the cylinder
STEAM DISTRIBUTION
Page 48 8.1 Generality
Page 48 8.2 Example of distribution in air duct
Page 49 8.3 Example of distribution in ambient
Page 49 8.4 Choosing a steam distributor
Page 49 8.5 Condensation recovery
ATTACHMENTS
Page 50 9.1 EU Declaration of Conformity
Page 51 9.2 ES-OEM-CCU Series spare parts
CHAP. 7
CHAP. 8
CHAP. 9

Rev. 02-21 Page 5
USER MANUAL
GENERALITY
The family of Pego EASYSTEAM OEM-CCU immersed electrode humidifiers can be considered
as the most complete by type of use and ease of maintenance.
The line includes humidifiers with 3kg/h and 6kg/h production capacity with single-phase electric
power supply, all able to work in ON/OFF mode, proportional mode with integrated humidistat and
4-20mA or 0-10V probe, proportional mode with 0-10V external signal, in ON/OFF mode from
integrated thermostat and proportional mode from integrated thermostat.
The EASYSTEAM humidifiers are provided with a microprocessor software enabling the widest
programming for a fully customised use and a completely automatic functioning.
In fact, it is possible to set the maximum capacity of steam production, values of production
capacity intermediate in percentage, the frequency of deconcentration discharges, the discharge of
water for inactivity.
The EASYSTEAM line is also provided with a display for real time viewing of the humidity in the
premises to be treated; the current absorbed by the electrodes, the hours of work, various alarms,
water charging and discharging as well as all easily settable programming parameters.
An acoustic alarm (buzzer) is present in the EASYSTEAM humidifiers that warns the user of any
anomalies; the internal software is able to evaluate the seriousness of the anomaly, blocking the
machine or continuing the steam supply.
The strength of the EASYSTEAM line is the simplicity with which the cylinder is replaced when
normal wear makes it necessary.
CHAP.1 INTRODUCTION
1.1

Page 6 Rev. 02-21
USER MANUAL
WARRANTY CONDITIONS
The EASYSTEAM series humidifiers are covered by a 24-months warranty against all
manufacturing defects as from the date indicated on the product ID code.
In case of defect the product must be appropriately packaged and sent to our production plant or to
any authorized Service Center with the prior request of the Return Authorization Number.
Customers are entitled to have defective products repaired, spare parts and labour included. The
costs and the risks of transport are at the total charge of the Customer.
Any warranty action does not extend or renew its expiration.
The Warranty does not cover:
•Damages resulting from tampering, impact or improper installation of the humidifier and its
accessories.
•Installation, use or maintenance that does not comply with the instructions provided with the
humidifier.
•Repair work carried out by unauthorized personnel.
•Consumables (immersed electrodes cylinders).
•Damages due to natural phenomena such as lightning, natural disasters, etc.
In all these cases the costs for repair will be charged to the customer.
The intervention service in warranty can be refused when the equipment is modified or transformed.
Under no circumstances Pego S.r.l. will be liable for any loss of data and information, costs of
goods or substitute services, damage to property, people or animals, loss of sales or earnings,
business interruption, any direct, indirect, incidental, consequential, damaging, punitive, special or
consequential damages, in any way whatsoever caused, whether they are contractual, extra
contractual or due to negligence or other liability arising from the use of the product or its
installation.
Malfunction caused by tampering, bumps, inadequate installation automatically declines the
warranty. It is compulsory to observe all the instructions in this manual and the operating conditions
of the product.
Pego S.r.l. disclaims any liability for possible inaccuracies contained in this manual if due to errors
in printing or transcription.
Pego S.r.l. reserves the right to make changes to its products which it deems necessary or useful
without affecting its essential characteristics.
Each new release of the Pego product user manual replaces all the previous ones.
As far as not expressly indicated, is applicable the Law and in particular the art. 1512 C.C. (Italian
Civil Code).
For any controversy is elected and recognized by the parties the jurisdiction of the Court of Rovigo.
1.2

Rev. 02-21 Page 7
USER MANUAL
FUNCTIONING PRINCIPLE
The immersed electrode humidifiers of the series EASYSTEAM, exploit the conductivity of water
for food use for the production of steam by boiling.
In the cylinder, an electric current is triggered between the immersed electrodes; this overheats the
water until it is brought to the boiling temperature.
The current intensity, expressed in amperes, varies according to the quantity of water present in the
cylinder and in contact with the surface of the electrodes and its conductivity.
The electronics present in the humidifier is able, thanks to an amperometric transformer, to measure
this intensity of current and therefore, by controlling the load solenoid valve to raise the water level
in the cylinder or the drain pump to lower it, it succeeds to control this phenomenon in an
absolutely automatic way.
Furthermore, thanks to a microprocessor technology and to an humidity sensor, proportional
operation can be set, optimizing the consumption of water and electricity according to the humidity
requirements of the environment to be treated.
In addition to ensuring functioning during steam output, the discharge pump also guarantees the
complete cylinder draining when the unit has been inactive for a set time: this prevents the
formation and the deposit of limescale or other particles created during the boiling process.
The EASYSTEAM series humidifiers are fully automatic and require only replacement of the
cylinder when the electrodes are worn.
The layout below illustrates the functioning principle.
1.3

Page 8 Rev. 02-21
USER MANUAL
The supplied steam is managed proportionally to steam production request that the electronic
control calculates depending on the
chosen functioning among the eight
available, described in chap. 2.4.
The minimum steam supply is set at
20% of the rated maximum current
(independently of Pr) and is managed
with an activation hysteresis; the
maximum supply, which occurs at a
maximum production request,
corresponds to the percentage set in the
first level variable (Pr). If for example
on an ES6 that produces 6kg/h of
steam, the variable Pr is set to 100%
the maximum production will be 6kg/h;
but if the variable Pr is reduced to 50%,
the maximum production will be 3kg/h.
For correct operation, the humidifier must be supplied with drinking water coming from the
aqueduct; this is because it is free from any element harmful to health and is compatible with
the range of conductivity useful for optimal operation of the humidifier. However, in some
geographical areas mains water may be unsuitable for optimal functioning due to very low
conductivity or high hardness or because it’s too aggressive; the below is a summary table of the
parameters required for correct humidifier functioning.
POTABLE WATER FUNCTIONING RANGE
LIMITS
with standard
cylinder
LIMITS
with cylinder
for low conductivity
PARAMETER
UNIT OF
MEASURE
MIN
OPT
MAX
MIN
OPT
MAX
Water conductivity at 20°C *
S/cm
250
400
1300
125
200
350
pH
7
8
8,5
7
8
8,5
Hardness
mg/l CaCO3
160
200
450
60
120
160
Chlorine
ppm Cl2
0
0
0,2
0
0
0,2
Chlorides
mg/l Cl-
0
<25
250
0
<20
100
Calcium sulphate
mg/l CaSO4
0
0
95
0
0
55
Metal impurities / Solvents / Soaps / Lubricants
mg/l
0
0
0
0
0
0
Temperature
°C
+1
+20
+40
+1
+20
+40
MIN = minimum - OPT = optimal - MAX = maximum
* Water conductivity is always expressed at 20°C; bear in mind that conductivity decreases as water
temperature drops and so water may not be very conductive during winter when mains water is
particularly cold.
In case of very low conductivity, consult chapter 5.3 on page 38 of this manual: Intelligent
production for low conductivity.
Do not supply the humidifier with well water or treated with osmosis purifiers,
demineralisers or softeners or taken from cooling circuits.
Minimum supply
Steam production request
Supplied steam
Maximum supply

Rev. 02-21 Page 9
USER MANUAL
ES-OEM-CCU SERIES HUMIDIFIERS IDENTIFICATION CODES
400ES3MOEMCCU Single-phase OEM humidifier with 3kg/h steam production capacity,
completed with electronics kit with ten selectable operating modes.
400ES6OEMCCU Three-phase OEM humidifier with 6kg/h steam production capacity,
completed with electronics kit with ten selectable operating modes.
OEM CCU SERIES HUMIDIFIERS IDENTIFICATION CODES
TECHNICAL DATA AND
WORKING CONDITIONS
400ES3MOEMCCU
400ES6OEMCCU
STEAM PRODUCTION (in kg/h)
3
6
ELECTRIC POWER SUPPLY
230V 50Hz *
400V 3/N 50Hz *
POWER (kW)
2
4,5
ABSORBED CURRENT (A)
9
6,5
TYPE OF CONTROL
Display NANO + Master HUM2 EASYSTEAM ES-MINI series
ELECTRONIC CONTROL POWER SUPPLY
230V 50-60Hz
STEAM OUTLET DIAMETER (mm)
25
25
CYLINDERS NUMBER
1
1
VACUUM WEIGHT (kg)
2,5
2,5
WEIGHT WITH OPERATIONAL UNIT (kg)
5
5
WATER SUPPLY PRESSURE
1-10 bar
FUNCTIONING AMBIENT TEMP.
+1 ÷ +50 °C
FUNCTIONING AMBIENT HUMIDITY
< 60 %RH (90 %RH non condensing)
STORAGE TEMPERATURE
-10 ÷ +70 °C
PROTECTION RATING
IP00
ELECTRONIC CONTROL FUNCTIONING
AMBIENT TEMP.
+0 ÷ +60 °C
ELECTRONIC CONTROL FUNCTIONING
AMBIENT HUMIDITY
< 60 %RH (90 %RH non condensing)
ELECTRONIC CONTROL PROTECTION
RATING
IP20
FOR DIFFERENT NEEDS, ARE AVAILABLE MODELS WITH OTHER SPECIFICATIONS.
* 60HZ VERSION AVAILABLE ON REQUEST.
FOR FURTHER INFORMATIONS CONTACT US.
1.4
1.5

Page 10 Rev. 02-21
USER MANUAL
OVERALL DIMENSIONS
IDENTIFICATION DATA
The appliance described in this manual is provided with a plate on the side reporting the
identification data of the same:
• Manufacturer Name
• Code of appliance
• Production Lot
• Power supply voltage
• Nominal current
STANDARD EQUIPMENT
For assembly and use, the EASYSTEAM line humidifiers are provided with:
Nr 1 3/4 gas connection for water load.
Nr 1 32mm external diameter connection for water discharge.
Nr 1 25mm external diameter connection for the steam tube.
Nr 1 User manual.
Nr 1 Test checklist which reports:
-Humidifier model.
-Default configuration.
-Steam production at 100%.
-Electric power supply type.
-Absorbed power in kW.
-Nominal absorbed current.
Nr 1 Electronics KIT (only for OEM series models).
-MASTER HUM2 (electronic control board with PEGO EasySTEAM software).
-NANO EasySTEAM (display for viewing status and settings).
-Toroid (current absorption sensor).
1.6
1.7
1.8
ELECTRONIC KIT
ELETTRONICA
ES-OEM-CCU HUMIDIFIER
Measures in mm

Rev. 02-21 Page 11
USER MANUAL
MAIN INSTALLATION WARNINGS
1. The installation, maintenance and use of the appliance must be carried out by qualified
personnel able to safely perform the requested operations. Carefully read this manual before
performing any operations and follow all its indications.
2. Install the appliance as close as possible to the environment where the steam is to be
introduced, namely in the position that guarantees the shorter length of the steam pipe. We
recommend not to exceed 5 meters.
3. Install the appliance at a height that allows easy access to the control unit for parameter
adjustment and viewing of the display. We recommend a height from the ground of about 1
meter.
4. Install the appliance at a height that allows easy access to the inside of the humidifier for
cylinder replacement.
5. Some parts of the humidifier, during operation, may exceed the temperature of 60°C. Make
sure that the surfaces in contact with the humidifier are compatible with these values.
6. Do not install and use the humidifier near products or objects that can be damaged in contact
with water or the humidity produced.
7. Avoid placing power cables with signal cables in the same conduit (probes and digital
inputs).
8. Reduce the lengths of the connecting cables as much as possible, avoiding that the wiring
takes up the spiral shape, which is harmful for possible inductive effects on the electronics.
9. Install a magneto thermal protection switch, upstream of the humidifier.
10. All conductors used in the wiring must be appropriately proportioned to support the load they
are to supply.
11. If it is necessary to extend the probe, it is necessary to use conductors with a suitable section
and in any case not less than 1mm2.
12. Connect a pipe with a diameter of not less than 32mm to the drain hose. This pipe must be
firmly clamped to the drain sleeve and have vertical development for at least the first 50cm.
Make sure that you do not create bottlenecks and do not exceed with its height, at any point in
the path, the level of the drain sleeve.
13. Use only drinking water for the water load, with a pressure between 1 and 10 bar.
CHAP. 2 INSTALLATION
2.1

Page 12 Rev. 02-21
USER MANUAL
14. Check the default setting shown on the enclosed TEST CHECKLIST, before starting up the
humidifier. If the default setting is different from your needs, set the parameters as indicated
in chapter 3 and in accordance with the connections indicated in chapter 2.4.
15. With the default setting of parameter In1=2, the humidifier to work requires the digital input
1 to be enabled by means of a voltage free contact (terminals 24 and 25 on the electronic
board Master HUM2) regardless of the selected operating mode.
16. If it is not necessary to use an external enable, jumper the terminals 24 and 25 on the Master
HUM2 electronic board or set the parameter In1=0.
17. Without enabling, the display alternates the word OFF with normal displaying.

Rev. 02-21 Page 13
USER MANUAL
SENSORS AND CONTROL SIGNALS CONNECTIONS
The humidifier has ten different operating modes that can be set by the software variable S9
described in chapter 3.5 and by specific electrical connections.
It is also necessary to enable the digital input In1 terminals 24 and 25 on the electronic board
Master HUM2 for all operating modes (enabling = closed contact between clamps 24 and 25). See
the parameter settings In1, In2 and In3 for all possible enablements. Without enabling, the display
alternates the OFF writing with normal displaying.
Below are the specific connections for every functioning mode.
If you want to connect the humidifier with a humidity probes not supplied by PEGO s.r.l.,
contact the after-sales assistance to verify the hardware compatibility between the probe
and the humidifier.
-[S9=0] ON/OFF Functioning:
This type of operation involves the production of steam in only 2 modes: no production or
production at full capacity. The consent is usually given by a voltage free contact coming from
an electrical panel which, in turn, is controlled by a humidistat. Set the second level variable
S9=0 and connect the consent to clamps 24 and 25 of the Master HUM2 board (Enabling
present with closed contact).
Cleaning function (CL1>0):
If CL1>0, when the steam production reaches CL2% the humidifier continues to work for CL1
minutes, then returns to stand-by (the buzzer sounds for 1 minute to signal the end of the
cleaning procedure). With CL1>0, the humidifier always remains in stand-by until the function
is manually activated, which is obtained by pressing the stand-by key.
ON-OFF
Signal
Steam production request
2.2
Enabling

Page 14 Rev. 02-21
USER MANUAL
-[S9=1] PROPORTIONAL functioning with 4-20mA ambient humidity probe
(INTEGRATED HUMIDISTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point. The consent is provided by a humidity probe at 4-20mA (0-100% RH) which, in addition
to regulating steam production, allows to show the relative humidity of the environment directly
on the humidifier display. Set the second level variable S9=1 and connect the signal 4-20mA of
the humidity probe to clamps 14 and 15; in particular, connect the RH signal to clamp 14, and
connect +V to clamp 15.
-
-
-
The Bp proportional band is the percentage value of humidity around the set point; the
humidifier works proportionally within this value. Example: if the proportional band is set on
default value 10% (±5% set point value) and humidity is set at 50%, below 45% the humidifier
will work at 100% of steam production; above 55%, the humidifier will not produce steam.
Between 45% and 55%, the humidifier will optimally regulate steam production.
-[S9=2] PROPORTIONAL functioning with 0-10Vdc reference signal:
This type of operation involves the production of steam proportionally to the reference signal
0-10Vdc. Example: a reference signal of 6Vdc will allow the humidifier to produce 60% of
steam production referred to the software variable Pr. So, if Pr = 70%, steam production will be
42%. Set the second level variable S9=2 and connect the signal of reference 0-10V to clamps 16
and 17; in particular, connect VRH (0-10Vdc probe output) to clamp 16 and GND mass to
clamp 17.
RH% Ambient
humidity probe
Steam production request
External signal of
reference 0-10V
Steam production request
External signal of
reference 0-10V
Enabling
GND
VRH
Enabling
RH% Ambient umidity
probe (4-20mA)
RH
+V

Rev. 02-21 Page 15
USER MANUAL
-[S9=3] PROPORTIONAL functioning with 4-20mA ambient humidity probe + 4-20mA
humidity probe in air duct (INTEGRATED HUMIDISTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point and to the value measured in duct.
Set the second level variable S9=3, connect the 4-20mA signal of ambient humidity probe
(0-100%RH) to clamps 14 and 15; in particular, connect RH signal to clamp 14 and +V to
clamp 15. Connect 4-20mA signal of humidity probe in air duct (0-100%RH) to clamps 20 and
21; in particular, connect signal RH to clamp 20 and +V to clamp 21. For further information on
the humidity probe in air duct, refer to chapter 3 “Programming” (variables StC, r0, t1).
-[S9=4] PROPORTIONAL functioning with 0-10Vdc reference signal + humidity probe in
air duct (4-20mA):
This type of operation involves the production of steam proportionally to the 0-10Vdc reference
signal and to the humidity measured in duct.
Set the second level variable S9=4 and connect the 0-10Vdc reference signal to clamps 16 and
17; in particular, connect VRH to clamp 16 and GND mass to clamp 17. Connect 4-20mA
signal of humidity probe in air duct (0-100%RH) to clamps 20 and 21; in particular, RH signal
to clamp 20 and +V to clamp 21.
For further information on the humidity probe in air duct, refer to chapter 3 “Programming”
(variables StC, r0, t1).
Enabling
RH% Ambient humidity
probe (4-20mA)
RH% humidity probe
in air duct (4-20mA)
RH
+V
RH
+V
Enabling
RH% humidity probe
in air duct (4-20mA)
External signal of
reference 0-10V
RH
+V
GND
VRH

Page 16 Rev. 02-21
USER MANUAL
-[S9=5] PROPORTIONAL functioning with 0-10Vdc ambient humidity probe
(INTEGRATED HUMIDISTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point. The consent is provided by a 0-10Vdc humidity probe (0-100%RH) that, in addition to
regulating steam production, allows to show the relative humidity of the environment directly
on the humidifier display. Set the second level variable S9=5 and connect 0-10Vdc signal of the
humidity probe to clamps 16 and 17; in particular, connect VRH signal to clamp 16 and connect
GND to clamp 17.
-
-
-
The Bp proportional band is the percentage value of humidity around the set point; the
humidifier works proportionally within this value. Example: if the proportional band is set on
default value 10% (±5% set point value) and humidity is set at 50%, below 45% the humidifier
will work at 100% of steam production; above 55%, the humidifier will not produce steam.
Between 45% and 55%, the humidifier will optimally regulate steam production.
-[S9=6] PROPORTIONAL functioning with 0-10Vdc ambient humidity probe + 0-10Vdc
humidity probe in air duct (INTEGRATED HUMIDISTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point and to the value measured in duct.
Set the second level variable S9=6 and
connect signal 0-10Vdc of the humidity
probe (0-100%RH) to clamps 16 and 17; in
particular, connect VRH signal to clamp
16 and connect GND to clamp 17.
Connect the humidity probe in air duct
signal 0-10Vdc (0-100%RH) to clamps 22
and 23; in particular, connect VRH signal
to clamp 22 and GND to clamp 23.
For further information on the humidity
probe in air duct, refer to chapter 3
“Programming” (variables StC, r0, t1).
RH% Ambient
humidity probe
Steam production request
RH% Ambient humidity
probe 0-10V
Enabling
VRH
GND
RH% Ambient humidity
probe 0-10V
Enabling
GND
VRH
GND
VRH
RH% humidity probe in
air duct (4-20mA)

Rev. 02-21 Page 17
USER MANUAL
-[S9=7] Functioning with integrated thermostat (ON/OFF hot call):
This type of operation involves the production of steam in only 2 modes: no production or
production at full capacity which is activated when the temperature measured by the ambient
probe falls below the value of SET POINT-r1 and remains active until the temperature increases
and exceeds the SET POINT.
Set the second level variable S9=7 and connect the NTC temperature probe to clamps 18 and 19
of the Master HUM2 electronic board.
(r1=Temperature differential referred to set point)
In this mode, it is possible to set the two configurable outputs (Do4 and Do5 already wired on
terminals 62 and 63, in tension) to manage a few typical functions of a sauna or a Turkish bath,
such as the essence inlet, the management of outlet or inlet fans.
Essence Management (dO4 or dO5 = 4):
In a Turkish bath the essence is provided (with the times set in t2 and t3) when the humidifier is
producing steam and the temperature measured by the ambient probe is higher than 70% of the
set point. By using the key combination arrow up + Stand-by is possible at any time to enable or
disable the inlet of the essence; in particular, the current status is displayed after pressing the
key combination for three seconds (EoF = essence OFF or Eon = essence ON) and by
continuing to hold the keys pressed for another three seconds, the state is switched.
Inlet fan (dO4 or dO5 = 3):
The inlet fan is usually used to introduce or mix the steam in the room. The relay linked to this
function is activated when there is a steam production request (it remains active even during the
phases of water discharge for deconcentration or due to overcurrent) and it is deactivated with
the delay set in parameter t6 after the end of the steam production request. If parameter t6 is set
to -1, the inlet fan run in continuous gear (active even during stand-by or alarms.
Outlet fan (dO4 or dO5 = -3):
The outlet fan is usually used to ensure air exchange and to create the fog effect. The relay
linked to this function is activated when there is no steam production request. It is also possible
to start a drying cycle at the end of the day; with the humidifier in stand-by, press the keys
arrow down + Stand-by to activate the cycle that is indicated on the display with the writing
Uon = outlet fans ON. In this phase the output of the outlet fan remains active for the hours set
in the variable t4. To stop this cycle, simply exit the stand-by status.
Cleaning function (CL1>0):
If CL1>0, when the temperature reaches the setpoint the humidifier continues to work for CL1
minutes, then returns to stand-by (the buzzer sounds for 1 minute to signal the end of the cleaning
procedure). With CL1> 0, the humidifier is always in stand-by until the function is manually
activated, which is obtained by pressing the stand-by key.
Ambient
Temperature
Steam production request
Enabling
NTC Probe
Ambient temperature

Page 18 Rev. 02-21
USER MANUAL
-[S9=8] PROPORTIONAL functioning REFERRED TO VALUE SENT ON RS485
(0-100%):
This type of operation involves the production of steam proportionally to the value set in
register 1537 by means of Modbus-RTU communication.
In this operating mode, the commands to force water discharge and produce steam have a time-
out of 1 minute; if during this period the command is not sent again on Modbus, at the end of
this time the steam production will be set to
zero and the drain pump will be disabled.
This secures the humidifier in case of
accidental disconnection of the communication
network.
Set the second level variable S9=8 and connect
the instrument to the RS485 line with clamp 32
to line A (TX+) and clamp 31 to line B (TX-).
For further information on Modbus-RTU
Protocol of the humidifier, refer to document
“MODBUS-RTU_UMIDMS03”.
-[S9=9] PROPORTIONAL functioning with NTC ambient temperature probe
(INTEGRATED THERMOSTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point. The consent is provided by a NTC ambient probe that, in addition to regulating steam
production, allows to show the ambient temperature directly on the humidifier display. Set the
second level variable S9=9 and connect the NTC temperature probe to clamps 18 and 19 of the
Master HUM2 electronic board.
-
-
-
The 2*r1 proportional band is the value in degrees Celsius (°C) around the temperature set
point; within this band the humidifier works proportionally.
Essence Management (dO4 or dO5 = 4):
See mode S9=7.
Inlet fan (dO4 or dO5 = 3):
See mode S9=7.
Outlet fan (dO4 or dO5 = -3):
See mode S9=7.
Cleaning function (CL1>0):
See mode S9=7.
Steam production request
Enabling
NTC Probe
Ambient temperature
°C Ambient
Temperature
Set + r1
Set - r1
B
A

Rev. 02-21 Page 19
USER MANUAL
HUM2 BOARD DIGITAL INPUTS
On the electronics of the humidifier there are four digital inputs with the following meaning:
Digital inputs In1, In2 are in low voltage.
Input In1 (clamps 24 and 25): input with configurable meaning based on the second level variable
In1. By default, this input is configured as "main enable": enable with closed contact between
terminal 24 and 25.
Input In2 (clamps 24 and 26): input with configurable meaning based on the second level
variable In2. the input is active when the contact between terminals 24 and 26 is closed or by
means of the jumper on the board, next to terminal 26. By default, this input is configured as
"discharge pump activation" to enable emptying the cylinder in case the console is not present.
Digital inputs In3, In4 are in high alternate voltage (mains voltage).
These inputs hear the mains voltage and for their
operation require the connection of one of the two
phases (in our case the neutral) to the clamp 4.
Input In3 (clamps 4<neutral> and 6<phase> ):
input with configurable meaning based on the
second level variable In3. The input is active with
phase input to clamp 6.
Input In4 (clamps 4<neutral> and 5<phase> ):
input for maximum water level in the cylinder,
active with phase input to clamp 5.
In ES series humidifiers input In4 is already wired.
If none of the inputs In1, In2 and In3 are
configured as enablement, the humidifier does not
need external enabling to operate.
HUM2 ELECTRONIC BOARD DIGITAL OUTPUTS
On the electronics of the humidifier there are five relays, two of which with configurable function.
The digital outputs Do1, Do2, Do3 and Do5 are normally open contacts with a single common
(terminal 9) while the output Do4 is independent and galvanically isolated, in particular:
Output Do1 (clamps 9 and 10): Electrodes.
Output Do2 (clamps 9 and 11): water load EV.
Output Do3 (clamps 9 and 12): Discharge pump.
Output Do5 (clamps 9 and 13): Configurable relay, already wired on terminals 62 and 63 of the
humidifier, in tension.
Output Do4 (clamps 7 and 8): Configurable relay.
By default, this output is set as alarm relay (second
level variable dO4 = 1).
Relay capacity characteristics:
Do1, Do2, Do3: 16(6)A 250Vac
Do4, Do5: 8(3)A 250Vac
In the ES series humidifiers, outputs Do1, Do2, Do3 and Do5 are already wired.
2.3
2.4
In1
In2
In4
In3
Phase
N
Do5
Do3
Do2
Do1
Do4

Page 20 Rev. 02-21
USER MANUAL
TA INPUTS FOR MEASURING CURRENT ABSORPTION
On the electronics of the humidifier there are two inputs from an amperometric transformer, to
measure the current of the immersed electrodes:
TA1 (clamps 27 and 28): For the connection of the TA, relative to the cylinder Nr 1
TA2 (clamps 29 and 30): For the connection of the TA, relative to the cylinder Nr 2
NET CONFIGURATION WITH MODBUS-RTU PROTOCOL
To insert the humidifier in an RS485 network with Modbus-RTU protocol, set the parameter
MS = 0 (single humidifier operating mode), and follow the diagram below.
Refer to the MODBUS-RTU_UMIDMS03 manual (available on our website: www.pego.it) for
MODBUS-RTU communication protocol specifications.
BOARD POWER SUPPLY
The humidifier electronics require a 230Vac 50-60Hz ±10% power supply and have a maximum
consumption of 5VA (only electronic part).
Power supply (clamps 2 and 3): 230Vac 50-60Hz power supply.
NANO EASYSTEAM DISPLAY FOR MASTER HUM2 ELECTRONIC BOARD
The Master HUM2 electronics is the heart of the humidifier, which can be combined with a NANO
EasySTEAM display that allows the display of the machine status, programming and configuration
of the parameters. The connection between the display and the Master is made by a cable with an
8-pin RJ45 telephone connector with cross-over connection (supplied together with the display) to
be inserted in the two J1 references.
The combined use of Master and display is the most complete and recommended method but not the
only one possible; once configured, the Master HUM2 electronics does not require the presence of
the display and can be used independently. It is also provided with status LED (see chapter 3.2) and
a switch (jumper) for the manual emptying of the cylinder (see chapter 2.5). In this single mode, the
alarms are reset by removing power to the electronics.
2.5
2.7
2.8
B
A
2.6