Carel HeaterSteam 4 User Manual

heaterSteam 4 - UR

Electric resistance humidifi er

User manual

High Efficiency Solutions

NO POWER

& SIGNAL

CABLES

TOGETHER

READ CAREFULLY IN THE TEXT!

ENG

IMPORTANT WARNINGS:

This product is compliant with the European directives and other standards
speci ed on the EC declaration of conformity. The customer is responsible
for suitably verifying any use of the product that implies application of
standards relating to any special environments and/or processes (e.g.
heavy industry, medical environments, maritime environments, railway
environments, etc.) other than those speci ed by Carel.

The humidifi ers manufactured by CAREL are advanced products, whose
operation is specifi ed in the technical documentation supplied with the product
that can be downloaded, even prior to purchase, from the website www.carel.
com. Every product made by CAREL Industried, in relation to its advanced level of
technology, requires a qualifi cation/ confi guration / setup phse in order to best
fulfi l your specifi c application. The lack of such phase of study, as indicated in the
manual, can cause the fi nal product to malfunction, of which CAREL cannot be
held responsible. The client (builder, developer or installer of the fi nal equipment)
assumes all responsibility and risk relating to the confi guration of the product in
order to achieve the expected results in relation to the specifi c fi nal installation
and/or equipping. In this case, subject to specifi c agreements, CAREL acts as a
consultant for the success of the installation / start-up / use of the machine, but
in no case does it accept liability for proper operation of the humidifi er and of
the fi nal plant, should the warnings and recommendations in this manual or in
any other technical documentation of the product not be followed. In particular,
in addition to the obligation to observe the above mentioned warnings and
recommendations for proper use of the product, we recommend paying
attention to the following warnings:

DANGER ELECTRIC SHOCK: The humidifi er includes live electrical parts.
Disconnect the power supply before accessing internal parts, in case of
maintenance and during installation.
DANGER WATER LEAKS: The humidifi er automatically and constantly sucks
in/drains quantities of water. Malfunctions in the connections or humidifi er
may cause leaks.
DANGER OF BURNS: The humidifi er contains hot parts and delivers steam
at 100 °C / 212 °F.

• The product is designed exclusively to humidify rooms either directly or

through distribution systems (ducts).

• Installation, operation and maintenance must be performed by qualifi ed

personnel, aware of the necessary precautions and able to perform the
required operations correctly.

• All operations on the product must be carried out according to the

instructions given in this manual and on the labels applied to the
product. Any uses or modifi cations unauthorized by the manufacturer are
considered improper. CAREL denies all responsibility for such unauthorized
uses.

• Do not attempt to open the humidifi er in any way other than the ones

described in the manual.

• Follow the regulations in force in the place where the humidifi er is installed.

• Keep the humidifi er out of the reach of children and pets.

• Do not install and use the product near objects that can be damaged by

contact with water (or condensate). CAREL denies all responsibility for direct
or indirect damage as a result of loss of water from the humidifi er.

• Do not use corrosive chemicals, aggressive solvents or detergents to clean

the internal or external parts of the humidifi er, unless specifi cally indicated
in the user’s manual.

ATTENTION

NO POWER

& SIGNAL

CABLES

READ CAREFULLY IN THE TEXT!

Separate the probe cables and the digital input cables as much as possible
from the inductive load and power cables to prevent possible electro­magnetic interference.
Never introduce power cables and signal cables (including those of electric
control board) into the same cable troughs.

The installation of the product must absolutely include the grounding
connection, using the special yellow-green terminal on the terminal block.
Do not use the neutral as grounding connection.

TOGETHER

DISPOSAL

Fig. 1 Fig.2

Please read and keep.

With reference to European Union directive 2012/19/EU issued on 4 July 2012
and related national legislation, please note that:

1. Waste Electrical and Electronic Equipment (WEEE) cannot be disposed

of as municipal waste but must be collected separately so as to allow
subsequent recycling, treatment or disposal, as required by law;

2. users are required to take Electrical and Electronic Equipment (EEE) at end-

of-life, complete with all essential components, to the WEEE collection
centres identifi ed by local authorities. The directive also provides for the
possibility to return the equipment to the distributor or retailer at end-of­life if purchasing equivalent new equipment, on a one-to-one basis, or
one-to-zero for equipment less than 25 cm on their longest side;

3. this equipment may contain hazardous substances: improper use or

incorrect disposal of such may have negative eff ects on human health
and on the environment;

4. the symbol (crossed-out wheeled bin – Fig.1) even if, shown on the

product or on the packaging, indicates that the equipment must be
disposed of separately at end-of-life;

5. if at end-of-life the EEE contains a battery (Fig. 2), this must be removed

following the instructions provided in the user manual before disposing
of the equipment. Used batteries must be taken to appropriate waste
collection centres as required by local regulations;

6. in the event of illegal disposal of electrical and electronic waste, the

penalties are specifi ed by local waste disposal legislation.

CAREL adopts a continuous development policy. Therefore, CAREL reserves the
right to carry out modifi cations and improvements to any product described
in this document without prior notice. The technical data in the manual
can undergo modifi cations without forewarning. The liability of CAREL in
relation to its own product is governed by CAREL general contract conditions
published on the website www.carel.com and/or by specifi c agreements with
clients; in particular, within the limits set by the applicable law, in no way will
CAREL, its employees or its branch offi ces/affi liates be responsible for any lack
of earnings or sales, loss of data and information, cost of replacement goods
or services, damage to objects or persons, work interruptions, or any direct,
indirect, accidental, patrimonial, coverage, punitive, special or consequential
damage in any way caused, be they contractual, out-of-contract, or due to
negligence or other responsibility originating from the installation, use or
inability of use of the product, even if CAREL or its branch offi ces/affi liates
have been warned of the possible damage.

Warranty for materials: 2 years (from the manufacture date, excluding
consumables).

Certi cation: the quality and safety of CAREL products are guaranteed by

CAREL’s ISO 9001 certifi ed design and production system, as well as
marking.

3

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

Content

ENG

1. INTRODUC TION AND INSTALLATION 7

1.1 HeaterSteam (UR*) .....................................................................................................................................7

1.2 Dimensions and weights .......................................................................................................................7

1.3 When opening the packaging ...........................................................................................................7

1.4 Positioning ......................................................................................................................................................7

1.5 Wall mounting ..............................................................................................................................................7

1.6 Removing the front panel .....................................................................................................................8

1.7 Mounting the front panel .....................................................................................................................8

1.8 Material supplied with the appliance ............................................................................................9

1.9 Technical data plate ..................................................................................................................................9

1.10 Water circuit ...................................................................................................................................................9

1.11 Layout of models UR002 – UR0013 ..............................................................................................10

1.12 Layout of models UR020 – UR0080 ..............................................................................................11

2. HYDRAULIC CONNEC TIONS 12

2.1 Supply water .............................................................................................................................................14

2.2 Drain water .................................................................................................................................................. 14

3. STEAM DISTRIBUTION 15

3.1 CAREL steam nozzles (SDPOEM00**) ..........................................................................................15

3.2 CAREL linear distributors for air ducts or AHUs (DP***DR0) ........................................15

3.3 CAREL blowers for room installation (VSDU0A*, VRDXL*) ............................................16

3.4 Steam transport pipe ............................................................................................................................16

3.5 Condensate drain pipe ........................................................................................................................16

3.6 Outlet pressure limits ............................................................................................................................17

4. ELECTRICAL CONNECTIONS 18

4.1 Wiring provisions ..................................................................................................................................... 18

4.2 Power cable connection .....................................................................................................................18

4.3 Control board .............................................................................................................................................19

4.4 Operating and control principles .................................................................................................20

4.5 Steam production control signals ..............................................................................................21

4.6 Control with humidity probes .........................................................................................................22

4.7 Control with temperature probes ................................................................................................. 23

4.8 Alarm contact ............................................................................................................................................24

4.9 Unit status contact / maintenance pre-alert ..........................................................................25

4.10 Production request analogue output .........................................................................................25

4.11 Final checks ................................................................................................................................................. 25

5. PREPARING FOR OPERATION 25

5.1 Preliminary checks .................................................................................................................................. 25

6. STARTUP AND USER INTERFACE 26

6.1 Start-up .......................................................................................................................................................... 26

6.2 Activation sequence ...........................................................................................................................26

6.3 Shutdown .....................................................................................................................................................26

6.4 Graphic terminal ......................................................................................................................................26

6.5 Keypad ...........................................................................................................................................................27

6.6 Display ............................................................................................................................................................ 27

6.7 Display graphic area 2 – Probes/Request ................................................................................. 27

6.8 Display graphic area 3 - Notifi cation center............................................................................ 27

6.9 Display graphic area 4 - Unit status ..............................................................................................28

6.10 Display graphic area 5 - Quick access .........................................................................................28

6.11 Display graphic area 6 - Unit status icons.................................................................................28

6.12 Main menu ..................................................................................................................................................29

6.13 Complete programming menu tree ...........................................................................................30

6.14 Alarms .............................................................................................................................................................32

7. USER MENU AND UNIT CONFIGURATION 33

7.1 Main menu ..................................................................................................................................................33

7.2 Menu E. Settings - a. Control ..........................................................................................................33

7.3 Menu E. Settings - b. Functions .....................................................................................................35

7.4 Menu E. Settings - c. Confi guration ...........................................................................................37

7.5 E.Settings – d.Master/Slave ..............................................................................................................41

7.6 E.Settings – e.Backup ...........................................................................................................................41

7.7 E.Settings – f.Manual mode ............................................................................................................... 41

7.8 E.Settings – g.Initialisation ................................................................................................................42

7.9 E. Settings - h. Supervision ...............................................................................................................43

7.10 E. Settings - i. Logout ..........................................................................................................................43

8. MASTER/SLAVE SYSTEM 44

8.1 Description of the Master/Slave system....................................................................................44

8.2 Network switch for Master/Slave connection .......................................................................44

8.3 Type of Master/Slave system installation .................................................................................. 44

8.4 Master/Slave system confi guration ..............................................................................................45

9. WEB SERVER 47

9.1 Integrated web server ..........................................................................................................................47

9.2 Connecting to the integrated web server ...............................................................................47

9.3 Description of the web server function ....................................................................................47

10. HARDWARE BACKUP 48

11. SUPERVISOR NETWORK 49

11.1 Supervisor network protocols and confi guration ...............................................................49

11.2 Table of supervisor variables ...........................................................................................................49

12. WIRELESS PROBES, INSTALLATION AND CONFIGURA
TION 57

12.1 Type of installation and wireless probe electrical connections ...............................57

12.2 Wireless probe installation .................................................................................................................57

13. ALARM TABLE 58

14. SPARE PARTS AND MAINTEN ANCE 60

14.1 Maintenance...............................................................................................................................................63

14.2 Maintenance operations .....................................................................................................................63

14.3 Maintenance frequency ...................................................................................................................... 63

14.4 Maintenance of the cylinder-boiler .............................................................................................64

14.5 Feed/drain tempering solenoid valve ........................................................................................65

14.6 Fill tank ........................................................................................................................................................... 66

14.7 Replacing the parts ................................................................................................................................66

14.8 Mechanical discharge of water in the cylinder .....................................................................67

15. WIRING DIAGRAMS 68

15.1 Wiring diagram UR002-UR004 single-phase 208 V / 230 V .................................................

- version U ...................................................................................................................................................68

15.2 Wiring diagram UR002-UR004 single-phase 230 V - version 0 .................................... 69

15.3 Wiring diagram UR006 single-phase 208 V / 230 V - version U...................................70

15.4 Wiring diagram UR006 single-phase 230 V - version 0 ....................................................71

15.5 Wiring diagram UR006-UR010-UR013 three-phase (208-230-400- ................................

460-575 V) - version U...........................................................................................................................72

15.6 Wiring diagram UR006-UR010-UR013 three-phase ................................................................

(230-400-460 V) - version 0 ................................................................................................................73

15.7 Wiring diagram UR020 three-phase (208-230-400-460-575 V ) - ....................................

version U

Wiring diagram UR027 three-phase (400-460-575 V) - .........................................................

version U ......................................................................................................................................................74

15.8 Wiring diagram UR020-UR027 three-phase (230-400-460 V ) - ........................................

version 0 .......................................................................................................................................................75

15.9 Wiring diagram UR027 three-phase (230 V ) - version U .................................................76

15.10 Wiring diagram UR040 three-phase (400-460-575 V) - version U

Wiring diagram UR053 three-phase (575 V) - version U .................................................77

15.11 Wiring diagram UR040-UR053 three-phase (400-460 V) - ..................................................

version 0 ........................................................................................................................................................78

15.12 Wiring diagram UR053 three-phase (400-460 V) - version U .......................................79

15.13 Wiring diagram UR060 three-phase (575 V) - version U .................................................80

15.14 Wiring diagram UR060 (400-460 V) - version U ....................................................................81

15.15 Wiring diagram UR060-UR080 three-phase (400-460 V) - ..................................................

version 0 .......................................................................................................................................................82

15.16 Wiring diagram UR080 three-phase (400-460-575 V) - .........................................................

version U ....................................................................................................................................................... 83

16. GENERAL FEATURES AND MODELS 84

16.1 heaterSteam models and electrical features ..........................................................................84

16.2 Electrical connection of boiler heaters ......................................................................................85

16.3 Technical features .................................................................................................................................... 86

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16.4 Steam transport pipe models ..........................................................................................................86

16.5 Steam nozzle models ............................................................................................................................86

16.6 Linear nozzle models and typical installations...................................................................... 87

1. INTRODUCTION AND INSTALLATION

ENG

1.1 HeaterSteam (UR*)

Range of isothermal electric heater humidifi ers for steam production
control and distribution, fi tted with graphic display.
Available models (identifi ed by means of the code on the label, pack aging
and on the technical data plate):

• UR002, UR004, UR006, UR010, UR013 with steam production capacity

up to 13 kg/h (28,66 lb/h), water connections under the base of the
humidifi er;

• UR020, UR027, UR040, UR053, UR060, UR080 with steam production

capacity from 20 to 80 kg/h (from 44.09 to 176.37 lb/h), water
connections next to the humidifi er.

1.2 Dimensions and weights

Models UR002..UR013 Models UR020...UR080

B

Size
mm (in)

A

B

C

Fig. 1.a

UR002…13 UR020…40 UR053…80

A 365 (14.37) 690 (27.16) 876 (34.48)
B 275 (10.82) 445 (17.51) 445 (17.51)
C 712 (28.03) 888 (34.96) 888 (34.96)

A

C

Tab. 1.a

Models UR002..UR013 Models UR020...UR080

<0,5°

≥200

(7.9”)

≥700

(27.6”)

≥200 (7.9”)

≥400 (15.7”)

≥200

(7.9”)

≥500

(19.7”)

≥700

(27.6”)

≥1000 (39.3”)

≥300

(11.8”)

Fig. 1.b

1.5 Wall mounting

Mount the humidifi er on the wall using the support bracket pre-attached
to the humidifi er, using the screws kit supplied (for mounting dimensions
see draws below).

Instructions for fastening:

1. unscrew the wall bracket from the one attached to the humidifi er;

2. secure the bracket to the wall (see Fig. 1.c), checking with a spirit level

the horizontal position; if the unit is mounted on a masonry wall, you
can use the plastic anchor plugs (Ø 8 mm, Ø 0.31in) and the screws
(Ø 5 mm x L= 50 mm, Ø 0.19 in x L= 1.97 in) supplied;

3. hang the humidifi er on the bracket using the profi le on the upper

edge of the unit’s rear (Fig. 1.d).

4. lock the humidifi er to the wall by means of the hole / holes found /

on the lower part of the rear panel of the machine (Fig. 1.d).

445

61

(2.39)

201

(7.92)

235,5
(9.27)

285,5

(11.24)93(3.67)

122,5
(4.82)

127

(4.99)

(17.52)

122,5
(4.82)

130

(5.13)

packaged 31(68.3) 73(160.9) 98(216.0)

Weights

empty 26(57.3) 63(138.8) 87(191.8)

kg (lb)

installed* 35(77.1) 97(213.8) 155(341.7)

Tab. 1.b

* in operating conditions, fi lled with water.

1.3 When opening the packaging

UR002…13 UR020…40 UR053…80

• check the integrity of the humidifi er upon delivery and notify to the

carrier immediately, in writing, any damage that can be attributed to
improper or careless transport;

• move the humidifi er to the installation site before removing it from the

packaging, grasping the neck from beneath;

• open the cardboard box, remove the protective material and remove

the humidifi er, keeping it upright at all times.

1.4 Positioning

• the unit is designed for wall mounting, suitable to support the weight

under operating conditions (see par. “Wall mounting”). The models
UR020*... UR080 * can be fl oor installed;

• to ensure proper distribution of steam, place the humidifi er next to the

steam distribution point;

• position the humidifi er vertically, use a spirit level to ensure the base is

perpendicular; observe the minimum clearances (see Fig. 1.b) to allow
space for maintenance.

UR053...080

169

(6.67)32(1.25)

230

(9.06)

UR002...013

41 (1.59)

(2.64)

67

(16.38)

365 (14.37)

67

(2.64)

162

(6.38)

731

(28.80)

137

(5.39)

416

230

30

(9.06)

(1.18)

49 (1.91) 49 (1.91)

(2.64)

67

67

(2.64)

106

(4.17)

59.5 (2.34)

75 (2.96)

588 (23.15)

486 (19.13)

9 (0.36)

(0.89)

UR020...040

145

(5.71)

22,5

400

(15.75)

22,5

(0.89)

145

(5.71)

728

30

(28.66)

(1.18)

Fig. 1.c

Caution: during operation, the external metal panels heat up, and
the back leaning against the wall can reach temperatures above 60 °C
(140 °F).

Fig. 1.d

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“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

1.6 Removing the front panel

Models UR002…UR013:

1

2

4

3

Fig. 1.e

1. turn the oval plate with the CAREL logo until the ground screw head

can be seen;

2. loosen the screw with a screwdriver;

3. grab the sides of the panel, lift it about 20 mm (0.79 in), and detach it

from the protruding edges of the humidifi er;

4. remove the panel by pulling it forward;

5. remove the protective fi lm.

1.7 Mounting the front panel

Models UR002…UR013:

1

3

2

Fig. 1.g

1. turn the red oval plate with the CAREL logo so that the fastening hole

below is visible;

2. slide the panel on the frame (keeping it slightly raised and tilted) until

it stops on the rear edges;

3. fasten the ground screw using a screwdriver, ensuring its tightening;

4. turn the red oval plate with the CAREL logo so that the fastening hole

below is no longer visible;

Models UR020...UR080:

4

Models UR020...UR080:

1

4

3

2

Fig. 1.f

1. remove the screws on the top of the humidifi er using a screwdriver;

2. grab the panel by lifting it from the top about 20 mm (0.79 in);

3. remove the panel by pulling it forward;

4. remove the protective fi lm (on all external surfaces of the humidifi er).

2

Fig. 1.h

1. slide the panel on the base, keeping it slightly tilted;

2. put it in vertical position and tighten the screws on the top cover

with a screwdriver.

Caution: in models UR020...UR080 open the electrical
compartment of the humidifi er using the slotted lock.

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

Fig. 1.i

8

ENG

1.8 Material supplied with the appliance

Once the packaging opened and the front panel removed, check
if there is a:

screws and anchor

Fig. 1.j

kit for wall mounting

only for models UR020...UR080: Code
FWHDCV0003 non-return valve with

Fig. 1.k

connection tube

1.9 Technical data plate

Humidifi ers can be identifi ed by means of the technical plate placed on
the partition wall of the electrical cabinet.

MOD.

A

Vac
Hz
PH
kW
kg/h
IP
Date

Part No.

Serial No.

IP
Date

Rev.

Part No.

1.10 Water circuit

Models UR002 – UR013

19

18

17

16

15

14

Models UR020 – UR080

31 2

4

5

6

7

8

9

10

11

12

13

Fig. 1.m

1

MADE IN ....

CAREL INDUSTRIES
Via dell'Industria, 11, 35020 Brugine
(Padova) Italy

Fig. 1.l

Note: tampering, removal, lack of the identifi cation plate or other

does not allow the safe identifi cation of the product and will
make any installation or maintenance operation to be performed diffi cult.

12

18

19

17

14

7

16

13

Fig. 1.n

1 Anti-foaming sensor 11 Drain tube tempering (*)
2 Overfi ll diaphragm 12 Drain valve tempering (*)
3 Fill diaphragm 13 Inlet valve
4 Feed tank 14 Drain pump

Electrodes for conductivity meas-

5

urement
6 Equaliser pipe 16 Overtemperature sensors (PTC)
7 Feed pipe 17 Heaters

8 Fill-up pipe 18

9 Level sensor 19 Thermal insulation
10 Overfl ow pipe/drain

(*) for the units equipped with it
(**) for full option modules only

15 Anti-adhesive fi lm (**)

Water temperature sensor (NTC)
(**)

6

9

5

9

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ENG

1.11 Layout of models UR002 – UR0013

A

B

C

24

13

25

12

10

2

28

29

6

26

21

20

18

17

27

22

1

30

30

5

4

3

8

11

9

19

!

7

14

15

16

23

Fig. 1.o

Key:

1 Solid state relay (SSR) 20
2 Motor protector (THP)
3 Fuse carrier (F1, F2)
4 Contactor
5 Transformer
6 Electronic controller 21 Fastening strap
7 Power cable terminal block 22 Heater
8 Pump fuse (F3) 23 Drain pump
9 RF interference suppressor (where envisaged) 24 Fill valve
10 Power cable gland 25 Drain tempering valve (where envisaged)
11 Fan control board 26 Feedwater tank
12 Auxiliary cable glands 27 SSR thermal protector (Klixon)
13 Cooling fan 28 X1-X2 (prepared for ventilated steam distributors connections)
14 ON/OFF switch 29 X3-X4 (prepared for external drain tempering valve) - where envisaged
15 Drain 30 Drain pump relay
16 Display
17 NTC probe socket
18 Boiler
19 Warning label

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

10

Level sensor

A Green LED: normal operation
B Yellow LED: fi ll
C Red LED: minimum level

1.12 Layout of models UR020 – UR0080

ENG

30

10

2

1

3

4

5

6

8

9

11

29

7

12

13

15

14

Fig. 1.p

Key:

1 Display 20 Drain tempering valve (where envisaged)
2 SSR thermal protector (Klixon) 21 Drain tempering inlet (where envisaged)
3 Cooling fan 22 Level sensor
4 Solid state relay (SSR) 23 Boiler
5 Heater fuses (where envisaged) 24 Drain pipe
6 Contactor 25 Heater
7 Motor protector (THP) 26 Boiler thermal protector (Klixon)
8 NTC probe socket 27 Foam detection sensor
9 Transformer 28 Water fi ll
10 Control board 29 Drain pump relay
11 Fuse carrier (F1, F2, F3) 30 X3-X4 (prepared for external drain tempering valve) - where envisaged
12 Power cable terminal block
13 RF interference suppressor (where envisaged)
14 Power cable inlet
15 ON/OFF switch
16 Drain pump
17 Drain collection tank ( 19 mm)
18 Drain
19 Fill valve

11

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ENG

2. HYDRAULIC CONNECTIONS

Important: before making the water connections disconnect the
humidifi er from the power supply.

Models UR002..UR013 Models UR020...UR080

2

1

3

4

1

2

3

4 7

5

4

5

6

WATER CONNECTIONS:

1. install a manual valve upstream (to cut off the water supply);

2. connect the humidifi er to the water supply. For UR002...UR013 models,

use a fl exible pipe 3/4’’G connection. For UR020...UR080 models
connect the fl exible pipe with the non-return valve (supplied - code
FWHDCV0003), to avoid the water inside the humidifi er making
contact with the one in the mains;

3. install a mechanical fi lter to retain any solid impurities (connect

downstream with respect to the tap.

4. connect a section of pipe for draining (resistant to temperatures of

100 ° C (212 ° F)) and with a minimum internal diameter of 40 mm
(1.6 in) for models UR002-UR013 and 50 mm (2 in), for models UR020
UR080; for drain tempering versions, water temperature will be 60 °C
(140 °F), with temperature is max 25 °C guaranteed;

5. provide a funnel to ensure continuity interruption in the drain piping;

6. connect a P-trap to prevent the return of odours;

7. for models UR020...UR080: connect a drain pipe from the tank to

the bottom of the humidifi er (this can run into the funnel used for
draining).

8. for drain tempering versions, water temperature will be 60°C (140°F)

with temperature is max 25°C (77°F) guaranteed.

6

Fig. 2.a

Set up for water connections:

Models UR002..UR013 Models UR020...UR080

D

B

A

Fig. 2.b Fig. 2.c

Key:

A Supply water inlet (also drain tempering inlet for UR002-UR013)
B Drain water outlet
C bottom tank drain water outlet (only for models UR020-UR080)
D Drain tempering inlet

A

B

C

Caution:

• once the installation is complete, fl ush the supply pipe for about

30 minutes by carrying water directly in the drain and without
introducing it into the humidifi er. This will eliminate any waste or
processing residues that could clog the inlet valve and/or cause foam
when boiling water;

• the drain pipe must run vertically downwards at least 30 cm (fi gure 2.a)

to prevent the return of steam.

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

12

ENG

Water connection heights:

Drain / Fill

Models UR002…UR013 (view from below):

Fig. 2.d

mm (in)

D 75 (2.95) E 62 (2.44)
D’ 126 (4,96) E' 116 (4.57)

Water fi ll Water fi ll Water drain Water drain

Steam exhaust and condensate drain

Models UR002…UR013 (top view):

A2

A3

A1

Fig. 2.f

size mm (in) Models UR002-UR013

F 126.7 (5)
F' 224 (8.8)
G 137.9 (5.4)
G' 21.7 (0.85)

A1 Steam outlet
A2 Juncture for the steam distributor condensate drain pipe
A3 Fan head power cable passageway (ancillary)

Models UR020…UR080 (left side view):

K

L’

L

L”

I”
I

I’

J

Fig. 2.e

mm (in)

l 50 (1.96) L' 230 (9.0)
l' 120 (4.72) L” 54 (2.1)
l" 20 (0.78) J 132(5.2)
L 122 (4.8) K 571(22.5)

Models UR020…UR080 (top view):

PP

B1

B2

Fig. 2.g

size mm (in) Models UR020...UR040 Models UR053-UR080

M 172 (2.0) 172 (6.8)
M' 31 (1.2) 52 (2.0)
N 273 (10.7) 260 (10.2)
N' --- 190 (7.4)
N" 46 (1.8) 52 (2.0)
P 60 (2.4) 60 (2.4)

B1 Set up for steam distributor condensate drain pipe
B2 Steam outlet

Water fi ll Water fi ll Water drain Water drain

13

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

2.1 Supply water

The supply water for the electric heater humidifi er must not be corrosive,
must not emit bad odours, and must not contain too much lime to
avoid excessive deposits. The water, supplied from mains of drinking
water or demineralised water, must have the following characteristics:

LIMIT VALUES FOR THE HEATER HUMIDIFIER WATER

Min Max

Specifi c conductivity at 20°C /68°fH σ20 - µS/cm 0 1500
Total dissolved solids TDS – mg/l (1) (1)
Fixed residual at 180°C/ 356°fH TDS – mg/l (1) (1)
Hydrogen ion activity pH 6 8.5
Total hardness TH– mg/l CaCO3 0 (2) 400
Temporary hardness mg/l CaCO3 0 (3) 300
Chlorides ppm Cl = 50(4)
Iron + Manganese mg/l Fe+Mn = 0.2
Silica mg/l SIO2 = 20
Residual Chlorine mg/l Cl- = 0.2
Calcium sulphate mg/l CaSO4 = 100
Metallic impurities mg/l 0 0
Solvents, diluents, detergents, lubricants mg/l 0 0

Tab. 2.a

1. Values depending on the specifi c conductivity; in general: TDS ≈0,93 * σR, 20

°C; R180 ≈0,65 * σR , 20 °C;

2. Not lower than 200% the content of chloride in mg/l Cl- ;

3. Not lower than 300% the content of chloride in mg/l Cl- ;

4. It could be necessary to intervene on the drain rate to avoid a concentration

in the boiling water higher than 300 mg/l Cl-;

For particularly aggressive water (conductivity <1 µS/cm), use titanium
heaters (heaterSteam titanium model).

Important: water treatment with polyphosphates or water
softeners is allowed, guaranteeing at least 60% of the initial

hardness value and no less than 5°f.

Softened water reduces maintenance requirements.
Softened water favors the concentration of dissolved salts in the water
inside the boiler, with the consequence of foam formation.

Not recommended:

1. the use of well water, industrial water or water from cooling circuits

and, in general, water which may be chemically or bacteriologically
contaminated;

2. the addition to the water of disinfectants or anticorrosion

compounds, as these may cause irritation.

Note: no relationship can be proven between water hardness and
conductivity; nonetheless, as an indication only, water with a hardness of
40°f should have a conductivity of approximately 900-1000 mS/cm a 20 °C.

2.2 Drain water

• contains the same substances dissolved in the supply water, but in

larger amounts;

• it can reach a temperature of 100 °C (212° F);

• it is not toxic and can be drained in the white waters collection

system.

3. for drain tempering versions, water temperature will be 60°C (140°F),

with temperature is max 25 °C guaranteed.

Important: completely demineralised water is aggressive. For

connection to a water system with fully demineralized water use
only installation items made of plastic resistant to chemicals (eg.
Polypropylene) or stainless steel.

3. STEAM DISTRIBUTION

3.1 CAREL steam nozzles (SDPOEM00**)

Compact steam distributors for small ducts or applications such as steam
baths. They can be mounted either horizontally or vertically (steam
exhaust facing upwords).

Mounting instructions (see  gure):

1. drill a series of holes in the wall of the pipe, using the drilling jig of

the distributor;

2. insert the distributor;

3. fasten the fl ange of the distributor using 4 screws.

50 50

31,5

31,5

31,531,5

50

D

100

57,5

B

C

Fig. 3.a

Key:

A. steam inlet
B. condensate drain

steam outlet
The hole dimensions vary depending on the distributor model:

• model SDPOEM0000: hole to be drilled manually,

C.

up to 30 mm (1.2 in) diameter;

• model SDPOEM0012: hole diameter 12 mm (0.5 in);

• model SDPOEM0022: hole diameter 22 mm (0.9 in);

D. drilling jig

Note: if using steam hoses with an inside diameter of 30 mm (1.2 in),

remove the 22 mm (0.9 in) inlet section from the steam nozzle.

C

B

AA

3.2 CAREL linear distributors for air ducts or

AHUs (DP***DR0)

The steam distributors for AHU or duct applications deliver steam along
their entire length in order to ensure the shortest not-wetting distance.
The distributor should be chosen based on the maximum required
capacity, the dimensions of the AHU/duct and the outlet diameter of
the humidifi er it is connected to. Install far from any obstacle (curves,
ramifi cation, section changes, grilles, fi lters, fans).

Minimum distance between distributor and obstacle: 1…1.5 m (3.3…4.9 ft).

Increase distance in case of:

1. increase in speed of the air in the duct;

2. turbulence decrease.

Mounting instructions (see fi gure):

• drill a series of holes in the wall of the pipe, using the drilling jig of the

distributor (found in the packaging of the distributor);

• insert the distributor with the steam outlet holes facing upwards;

• fasten the fl ange of the distributor using 4 screws.

1

3

4

5

X

X

2

6

L

A

Y

B

8

°2

9

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

Fig. 3.b

14

ENG

Key:

1. L-shaped mounting bracket (where applicable)

2. fl ange gasket

3. steam inlet (ØA)

4. condensate drain (ØB)

5. fl ange screw (see instructions sheet that comes with the distributor)

6. L = length (depending on the model of distributor, see paragraph

“Linear distributors” )

7. tilt angle (about 2 °) for condensate drain

8. diameter of the hole in the wall (ØY)

Size in mm (in)

ØA 22 (0.9) 30 (1.2) 40 (1.6)
ØB 10 (0.4) 10 (0.4) 10 (0.4)
ØY 58 (2.3) 68 (2.7) 89 (3.5)
Ø 35 (1.4) 45 (1.8) 60 (2.4)
X 68 (2.7) 77 (3.0) 99 (3.9)

DP***D22R0 DP***D30R0 DP***D40R0

linear distributors from CAREL

Tab. 3.a

Caution:

1. mount the distributor slightly tilted (at least 2°, to facilitate the

condensate discharge);

2. the L-shaped supports (see element 1 Fig. 3. b) is supplied with steam

distributors models from DP085* to DP205*. For shorter lengths the
bracket can be supplied as optional (code 18C478A088).

3.3 CAREL high-e ciency linear distributors
for air ducts or AHUs (DP***RH)

CAREL high-effi ciency linear distributors can be used wherever there is
the need to reduce condensate formation within the distributor itself.
All the information provided in the paragraph on linear distributors
still applies, while the dimensions and diameters corresponding to the
DP***RH distributor are shown below.

1

3

4

X

5

X

2

6

A

1

Y

B

8

°2

7

3.4 CAREL blowers for room installation
(VSDU0A*, VRDXL*)

Steam distributors for installation in rooms. These come with a fan
to assist steam absorption. The VSDU0A* blowers can be used on
humidifi ers with fl ow-rates up to 18 kg/h (39.7 lb/h), i.e. models UR002…
UR013. They can be connected to the top of the humidifi er, or separately
in a remote position using the fastening support VSDREM0003 (see Fig.

3.c). These distributors have a power supply inside the electrical panel (24

Vac, Terminals X1, X2).

D

D

B

C

Assembly (all dimensions in m [ft])
Ref. On top of the humidi er Wall

A > 3 (9.8) > 3 (9.8)
B >1 (3.3) >1 (3.3)
C around 2.1 (6.8) around 2.1 (6.8)
D > 0.5 (1.6) > 0.5 (1.6)
E - ≤4 (13.1)

A

Fig. 3.c

Note:

• the value of C may be lower when transiting in front of the blower is

not possible;

• see the humidifi cation manual for details on positioning

Caution: in order to achieve proper steam distribution observe
the distances indicated in the fi g. above.

For the humidifi ers larger than 18 kg/h, the are ventilated steam
distributors code VRDXL00000 with 230 Vac power supply, external
power supply (maximum capacity 45 kg/h). The distributors are designed
for installation in a remote position, and require two steam hoses with a
30 mm diameter, c. Connected to a “Y” adapter (available as accessories,
contact Carel for details on the product code).

D

D

B

E

A

D

D

B

E

C

A

30222190_002_R01

Tab. 3.b

Fig. 3.b-1

Key:

1. “L” shaped fi xing bracket (where featured)

2. fl ange gasket

3. steam inlet (ØA)

4. condensate drain (ØB)

5. fl ange screw (see the technical leafl et supplied with the distributor)

6. L = length (depending on the distributor models, see the paragraph

on “Linear distributors”)

7. slope (about 2°) for condensate drainage

8. diameter of the hole in the wall (ØY)

Dimensions in mm (in)

CAREL high-effi ciency distributors

DP***D30RH DP***D40RH
ØA 30 (1.2) 40 (1.6)
ØB 10 (0.4) 10 (0.4)
ØY 68 (2.7) 89 (3.5)
Ø 45 (1.8) 60 (2.4)
Ø1 60 (2.4) 80 (3.1)
X 77 (3.0) 99 (3.9)

C

30222195_002_R01

Fig. 3.d

Assembly (all dimensions in m [ft])
Ref. Wal l Re f. Wa ll

A >5 (16.4) D > 0.5 (1.6)
B ≥2 (6.5) E ≤4 (13.1)
C+E ≥2.1 (6.8)

Note:

• the value of C+E may be lower when transiting in front of the blower

is not possible;

• see the humidifi cation manual for details on positioning

In this case, terminal J19.1 on the control board is used as a voltage-free
contact (normally open when there is no production - SSR OFF). This

contact has a maximum rating of 2 A.

15

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

Tab. 3.c

ENG

”

3.5 Steam transport pipe

• use CAREL fl exible hoses (max 4 m long, see section “Models of steam

conducting pipes”);

• avoid the formation of pockets or traps (cause of condensate

accumulation)

• avoid choking the pipe with sharp bends or twists.

• Use metal clamps to fasten the ends of the pipe to the connections

on the humidifi er and the steam distributor, so that they do not come
loose as a result of the temperature.

• avoid strains which include mechanical stress on the cylinder steam

outlet tailpiece

>5°

D> 200mm (8”)

>20°

R> 300mm (12”)

1

3.6 Condensate drain pipe

During the operation of the humidifi er part of the steam can condense,
causing effi ciency loss and noise (gurgling).
To drain the condensate connect to the base of the distributor a discharge
pipe with a water trap and a minimum slope of 5° (see fi g.3.d).

CAREL condensate drain pipes: code 1312368AXX (ø 10mm) ­(CHOSE00516 (5/16”) for North American market) for DP* series linear
steam distributors; code 1312353APG (ø 7mm) - (CHOSE0038 (3/8”) for
North American market) for steam blowers and nozzles.

Caution: the condensate drain pipe trap must be fi lled with water
prior to turning on the humidifi er.

Below are show some installation examples of the steam transport and
condensate drain pipes:

All the UR models

>5°

D> 200mm (8”)

>5°

R> 300mm (12”)

H ≤ 2 m (7.8”)

All the UR models

R>300mm (12”)

D> 200mm (8”)

R>300mm (12

SI

Fig. 3.g

Fig. 3.h

D> 200mm (8”)

Fig. 3.i

NO

NO

NO

Fig. 3.e

Models UR002...UR013 (1), condensate drain connection with return
to  ll tank:

>5°

D> 200mm (8”)

Models UE020...UR080 (1) extend the pipe inside the humidi er up to
the base tank.

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

>20°

R> 300mm (12”)

1

Fig. 3.f

3.7 Outlet pressure limits

The backpressure at the boiler outlet, either positive or negative, depends
both on the relative pressure in the duct/AHU and the pressure drop in
the steam pipe, due to bends or adapters, and the steam distributor.
Carel steam transport pipes have a pressure drop of around 150 Pa/m
(0.021psi) (respecting the maximum fl ow-rate recommended by Carel).
Carel DP* series linear distributors have a pressure drop of around 25 Pa
(0.003psi) (respecting the maximum fl ow-rate recommended by Carel).
Considering these values, the boiler outlet pressure must be:

boiler outlet pressure > 150 [Pa/m] * steam pipe length [metres] + 25 [Pa]
DP + pressure in duct/AHU [Pa]

Boiler outlet pressure values for heaterSteam:

pressure limits at boiler outlet
Pa (PSI)

Note: a pressure of around -200 Pa (-0.029 psi) at the boiler outlet
corresponds to around 20 mm (0.78”) of water inside the boiler (for all
sizes).

16

UR002…R013 UR020…UR080
0 to 1500 (0 to

0.218)

0 to 2000 (0 to

0.290)

4.1 Wiring provisions

Models UR002-UR013

4. ELECTRICAL CONNECTIONS

ENG

L

3

GND

N

Outside, bottom view Inside, top view

3

1

Fig. 4.a Fig. 4.b

Models UR20-UR80

Outside, side view

Fig. 4.c

Key:

1. power supply cable inlet;

2. inlet (after removing the knock-out) for other uses;

3. probe cables inlet (after removing the knock-outs).

1

A

1

3

B

2

Fig. 4.d Fig. 4.e

L

GND

N

5

4

C

GND

L

N

1

3

Fig. 4.f Fig. 4.g

2

Models UR020-UR080

1. identify the rubber cable gland (A) on the right side of the unit and

insert the power cable;

2. inside the electrical panel: unscrew the cable gland (B), connect the

wires to the terminal block and tighten the screws again to fasten
the cable.

4.2 Power cable connection

Before making the connections, make that the unit is disconnected from
the mains power supply: move the main system switch and humidifi er
switch to OFF).

Important: the humidifi er ON/OFF switch disconnects power
only to the electronic controller, and not the other devices, which

therefore remain powered.

Check that the unit’s power supply voltage corresponds to the rated value
shown inside the electrical panel. Remove the front panel as explained in
chap. 1.
To enter the power and probe cables, see the follow the procedures
described below:

Models UR002-UR013

1. unscrew the screws and remove the cover (A);

2. if necessary, cut the top part of the conical cable gland (B) and insert

the power cable;

3. connect the electrical wires to the terminal block, reposition the

cover and fasten it using the screws;

To attach the probe cable:

4. remove the knock-out (C) and unscrew the screws;

5. insert the probe cable through the opening created: then fasten the

cable using the screws.

L1

L3

GND

L2

B

A

Fig. 4.h

The humidifi er power line must be fi tted by the installer with a disconnect
switch and fuses to protect against short circuits. The table shows the
recommended sizes of the cable and fuses; nonetheless, these data are
purely indicative and, if diff erent from local standards in force, the latter
must prevail.

Note: to avoid unwanted interference, the power cables should
be kept separate from the probe signal cables.

Important: connect the yellow-green wire to the earth terminal

(GND).

17

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

4.3 Control board

The control board (S) is inside of the electrical panel in the wall dividing.

The auxiliary connections (probes, remote terminal, alarm) are made by
inserting the cables form the outside into the electrical panel.

To do this, use cables gland located on the base of the unit to the plug-in
screw terminals on the control board.

1 2 1 123 1 2 3452121122123456

J17C

J17L J23 J24 J19J20J3 J16 M3 J18

G

2 1

UR002-UR013 UR020-UR080

S

S

Fig. 4.i

2 1

J21

1 1234567821132 31221212

main probe

ext. regulator

Control signal

Key:

Terminal Function Electrical speci cations

M1 M1.1 GND (G0)

M1.2 Controller power supply 24Vac +10%/-15% 50/60Hz

M2 M2.1 Main room probe signal

M3 M3.1

M5 M5.1 Unit status contact (NO)

M6 M6.1 Alarm common

input or signal from external
controller

M2.2 GND
M2.3

Probe power supply (+G)

G Probe power supply (+G) CAREL 0-10 V

M2.4

Digital input for backup/
rotation function

M2.5 Limit humidity probe signal

input

M2.6 GND
M2.7 GND
M2.8

Remote on/off contact
digital input

Fieldbus

M3.2 Tx/Rx+
M3.3 GND

M5.2 Unit status contact

common

M6.2 NC alarm contact
M6.3 NO alarm contact

0/1V, 0/10V, 2/10V, 0/20mA,
4/20mA, NTC 10 kΩ a 25 °C

+12 Vdc, maximum current that
can be delivered 50 mA; Protec­tion against short-circuits

Maximum current output: 5 mA;
Maximum voltage with contact
open: 13 Vdc
0/1V, 0/10V, 2/10V, 0/20mA,
4/20mA, NTC

Maximum current output: 5 mA;
Maximum voltage with contact
open: 13 Vdc
Tx/Rx-

250 Vac; 2 A with resistive load;
2 A with inductive load

250 Vac; 2 A with resistive load;
2 A with inductive load

GND

M2M9

12Vdc

limit probe

M8 M1 M5 M6M12

GND

Remote

ON/OFF

Ethernet

L-

L+

GND

RS485 Serial

Unit

status

relay

CNOC

Alarm

relay

NC

NO

Fig. 4.j

Terminal Function Electrical speci cations

M8 M8.1 Production request analo-

M9 M9.1 Backup and rotation contact

M11 Ethernet port
M12 M12.1

J18 pLAN/display terminal
J19 J19.1 Auxiliary/blower contact

gue output

M8.2 GND

common

M9.2 Backup and rotation NO

contact

BMS 485

M12.2 Tx/Rx+
M12.3 GND

Earth connection

(NO)

J19.2 Auxiliary/blower contact

common

USB Port (type A)

Ethernet RJ45 Port

Output voltage range: 0-10 V
max 10 mA

250 Vac; 2 A with resistive load;
2 A with inductive load

Tx/Rx-

250 Vac; 2 A with resistive load;
2 A with inductive load

Tab. 4.c

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

18

ENG

4.4 Operating and control principles

Before describing each electrical connection on heaterSteam, below are
some fundamental aspects regarding the control of steam humidifi ers.

4.4.1 Operating principle of a heater humidi er

HeaterSteam is an isothermal steam humidifi er whose technology uses
heaters immersed in a cylinder or boiler fi lled with water. This may be
mains water or demineralised water. The heat generated by the heaters
increases the water temperature up to around 100°C (212°F). The use of
demineralised water ensures long cylinder and heater life, as virtually no
scale builds up. On the other hand, if using mains water, some of the
minerals dissolved in the water accumulate in the cylinder as solids
with diff erent compositions. To prevent this from occurring, when the
water conductivity in the cylinder exceeds a certain value, some of the
water is periodically drained and replenished, thus diluting the water. In
models where featured, the drain water is mixed with mains water so
as to not exceed the maximum temperature allowed by national and
local standards in force (drain tempering function). The steam generated
has a temperature of around 100°C (212°F) and minimal positive
pressure (unpressurised steam). It is virtually free of minerals and germs.
Steam production is controlled with ON/OFF logic or with continuous
modulation from 0% to 100% of rated output, using solid state relays
(SSR); the control logic in this case is PWM (i.e. pulse width modulation)
with a programmable time base.

4.4.2 Control principles

The appliance is fi tted with solid state relays (SSR), meaning steam
production is continuously adjustable based on demand, in one of the
following modes.

4.4.3 ON/OFF control

Operation is all or nothing, and is activated by an external contact; the
maximum percentage of unit production can be set.

4.4.5 Autonomous control with humidity probes

Steam production is related to the % rH reading made by the relative
humidity probe and increases as the value read deviates from the set
point St. Maximum production Pmax corresponds to the case where the
humidity value, read by the probe, is BP away (proportional band) from
the set point. The activation hysteresis hy is settable by the user.

Pmax

Steam_Pr

Pmin

ON

BP

Fig. 4.l

Key:

Steam_pr Steam production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production

To check that the relative humidity measured by the transducer is within
certain preset values, two alarm thresholds can be set in autonomous
control:

• high relative humidity alarm threshold;

• low relative humidity alarm threshold.

When these thresholds are exceeded, an alarm is activated by closing the
corresponding relay contact on the main control board.

hy

OFF

%rH

St

4.4.4 Proportional to an external signal (modulating
control)

Steam production is proportional to the value of an external signal Y,
(selectable by programming one of the following standards: 0 to 1 Vdc; 0
to 10 Vdc; 2 to 10 Vdc; 0 to 20 mA; 4 to 20 mA). The maximum production
Pmax corresponds to the maximum value of the external signal Y and
will be the humidifi er’s rated production. The activation hysteresis hy is
settable by the user and refers to the external signal Y.

Pmax

Steam_Pr

Pmin

OFF ON

0%

Key:

Steam_pr Steam production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production

Note: the graph shown above applies when the pre-heating

function is disabled.

hy 2xhy 100%

Fig. 4.k

Y= 0…1Vdc
0…10Vdc
2…10Vdc
0…20mA
4…20mA

Y

4.4.6 Autonomous control with relative humidity
transducer and outlet limit probe

In this case too, the controller modulates steam production based on the
% rH measured by the main relative humidity transducer, while limiting
production if the humidity measured by a second limit transducer,
located in the air duct downstream of the steam distributor, approaches
the maximum desired value. Consequently, to prevent the relative
humidity of the outlet air from exceeding a value that is considered
excessive, the control module with autonomous control and limit
transducer can be set with a high relative humidity alarm threshold.
When this threshold is exceeded, the alarm is activated by closing the
corresponding relay contact on the main control board. The limit probe
allows steam production to be modulated depending on the specifi c set
limit diff erential.

4.4.7 Application for steam baths

In applications for steam baths, in which the control probe measures
temperature rather than humidity, the same rules apply as for
autonomous control with probe.
By setting control to temperature, the humidifi er will continue to produce
steam until reaching the desired set point temperature inside the steam
bath, and consequently the desired saturation of the air (fog eff ect).
Recommended CAREL transducer: ASET030001 or ASET030000, or NTC
probes UEKNTC0*.

19

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

4.5 Steam production control signals

The humidifi er features solid state relays (SSR) for modulating steam
production, and consequently capacity may range from 1 to 100% of output,
depending on control requirements. The humidifi er can be connected via
RS485 serial or Ethernet connection to a remote supervisor. Depending on
the type of signal used, steam production can be enabled and/or managed
in diff erent ways (ON/OFF or modulating).

Important: the probe inputs are protected against short-circuits,
and the maximum current delivered (M2.3) is 50 mA. Despite this, it is
recommended to confi gure the “Control type” before connecting the
probes to the terminals.

To help users confi gure the unit, a screen index is shown at the top right of the
display. The screen index corresponds to the sequence in each menu in order
to reach the specifi c page.

Screen
index

Fig. 4.m

Steam production can be started by:

HUMIDISTAT (ON/OFF operation):

• connect terminals M2.1 and M2.2 (production request) to a humidistat;

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

• to enable ON/OFF operation, set:

Screen index Screen description Parameter

Ea01 Control type External ON/OFF signal
Ea04 Maximum production 0-100% of rated production

Screen ind. Screen desc. Parameter

Ea01 Control type proportional to external signal
Ea03 Proportional band Set: Hysteresis (0-100%)

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA,

1 12345678212

Minimum production (0-100%)
Maximum production (0-100%)

4-20mA

M2M9 M8

REF

OUT

Fig. 4.p

_________________________________________________________

EXTERNAL PROPORTIONAL CONTROLLER and REMOTE CONTACT
(modulating operation)

• connect terminals M2.1 and M2.2 (production request) to a humidistat;

• connect inputs M2.7 – M2.8 (enable) to a remote contact (e.g.: switch,

timer,...);

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type proportional to external signal
Ea03 Proportional band Set: Hysteresis (0-100%)

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA,

1 12345678212

Minimum production (0-100%)
Maximum production (0-100%)

4-20mA

M2M9 M8

M2M9 M8

1 12345678212

Fig. 4.n

_________________________________________________________

HUMIDISTAT and REMOTE CONTACT (ON/OFF operation)

• connect terminals M2.1 and M2.2 (production request) to a humidistat;

• connect inputs M2.7 – M2.8 (enable) to a remote contact (e.g.: switch,

timer,...);

• to enable ON/OFF operation, set:

Screen index Screen description Parameter

Ea01 Control type External ON/OFF signal
Ea04 Maximum production 0-100% of rated production

1 12345678212

M2M9 M8

Fig. 4.o

Steam production can be enabled and controlled by:

EXTERNAL PROPORTIONAL CONTROLLER (modulating operation)

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

• connect terminals M2.1 and M2.2 (production request) to an external

controller;

• to enable control, set:

REF

OUT

Fig. 4.q

_________________________________________________________

EXTERNAL PROPORTIONAL CONTROLLER and REMOTE CONTACT
(modulating operation) with LIMIT PROBE

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect terminals M2.1 and M2.2 (production request) to an external

controller;

• connect the active limit probe to terminals M2.5, M2.3 (+12Vdc), M2.6

(GND);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type prop. to external signal with limit probe
Ea03 Proportional band Set:

Ea06 Limit probe Set:

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA,

Ec02 Limit probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA,

Hysteresis (0-100%)
Minimum production (0-100%)
Maximum production (0-100%)

Set point (0-100 %rH)
Diff erential (0-100%)

4-20mA

4-20mA

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

20

ENG

1 12345678212

OUT H / T

+ (G)

OUT

M

M2M9 M8

REF

Fig. 4.r

Note: in industrial environments (IEC EN61000-6-2) the signal cables
leaving the unit must not exceed 30 m (98’) in length: steam production
signal cable (terminals M2.1, M2.2), digital remote on/off input (terminals
M2.7, M2.8) and shielded cable for RS485 communication.

4.6 Control with humidity probes

The main control board, connected to a room humidity probe, manages
steam production based on the humidity measured. A second outlet
humidity limit probe can also be connected: with this confi guration,
typical of air handling units, the main control board continues managing
steam production according to the humidity requirement, however
production is limited according to the relative humidity measured in the
outlet duct.

HP HLP

M2M9 M8

1 12345678212

OUT H / T

M

+ (G)

Main probe

Fig. 4.t

_________________________________________________________

CONTROL WITH ONE HUMIDITY PROBE AND LIMIT PROBE

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

• connect the active limit probe to terminals M2.5, M2.3 (+12Vdc), M2.6

(GND);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type humidity with limit probe
Ea05 Modulating

Ea06 Limit probe Set point (0-100 %rH)

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA
Ec02 Limit probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA

control

Set:
humidity set point (0-100 %rH)
diff erential (2-20%rh)
Minimum production (0-100%)
Maximum production (0-100%)

Diff erential (0-100%)

Remote
contact

Fig. 4.s

Key:

HP Humidity control probe (intake/room humidity probe)
HLP Limit humidity probe (outlet humidity probe)
Remote Contact Remote contact

CONTROL WITH ONE HUMIDITY PROBE

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

Note: when using Carel 0-10V probe, connect the probe power
supply +(G) to terminal “G” on the board rather than terminal M2.3.

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type one humidity probe
Ea05 Modulating control Set:

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V,

humidity set point (0-100 %rH)
diff erential (2-20%rh)
Minimum production (0-100%)
Maximum production (0-100%)

0-20mA, 4-20mA

M2M9 M8

1 12345678212

OUT H / T

M

+ (G)

Main probe

OUT H / T

M

+ (G)

Second probe

Fig. 4.u

The following probes can be connected:

CAREL probes for rooms DPWC111000
for air ducts DPDC110000, DPDC210000
for technical applications DPPC210000, DPPC210000

Note: non-CAREL active probes can be connected to the controller.

CONTROL WITH TWO HUMIDITY PROBES

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

• connect the second active probe to terminals M2.5, M2.3 (+12Vdc) and

M2.6 (GND);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

21

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type Modulation with two humidity probes
Ea02 Control with 2 probes Set the weight of the two probes (0-100%)
Ea05 Modulating control Set:

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA
Ec02 Second probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA

humidity set point (0-100 %rH)
diff erential (2-20%rh)
Minimum production (0-100%)
Maximum production (0-100%)

The controller will calculate the weighted average between the two
probes. The weight of the two probes can also be set.

M2M9 M8

1 12345678212

OUT H / T

M

+ (G)

Main probe

OUT H / T

M

+ (G)

Second probe

Fig. 4.v

The following probes can be connected:

CAREL probes for rooms DPWC111000
for air ducts DPDC110000; DPDC210000
for technical applications DPPC210000; DPPC210000

Note: non-CAREL active probes can be connected to the controller.

4.7 Control with temperature probes

The controller features independent internal temperature control,
and can be connected to a temperature probe TT (Fig. 4.r). It performs
complete control based on the temperature measured inside the
controlled environment.

Screen ind. Screen desc. Parameter

Ea01 Control type one temperature probe
Ea05 Modulating

control

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA

Set:
temperature set point (0-100 °C) (32-212°F)
diff erential (2-20°C) (3.6-36°F)
Minimum production (0-100%)
Maximum production (0-100%)

M2M9 M8

1 12345678212

OUT H / T

M

+ (G)

Main probe

Fig. 4.x

_________________________________________________________

CONTROL WITH ONE TEMPERATURE PROBE AND LIMIT PROBE

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

• connect the active limit probe to terminals M2.5, M2.3 (+12Vdc), M2.6 (GND);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

• to enable control, set:

Screen ind. Screen desc. Parameter

Ea01 Control type Temperature with limit
Ea05 Modulating

control

Ea06 Limit probe Set point (0-100 °C/°F)

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA
Ec02 Limit probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA

Set: temperature set point (0-100 °C) (32-212°F)
diff erential (2-20°C) (3.6-36°F)
Minimum production (0-100%)
Maximum production (0-100%)

Diff erential (0-100%)

M2M9 M8

1 12345678212

TT

Remote
contact

Fig. 4.w

Key:

TT Active temperature probe
Remote Contact Remote contact

CONTROL WITH ONE ACTIVE TEMPERATURE PROBE

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

• to enable control, set:

OUT H / T

M

+ (G)

Main probe

OUT H / T

M

+ (G)

Second probe

Fig. 4.y

The following probes can be connected:

CAREL probes for rooms DPWC111000
for air ducts DPDC110000; DPDC210000
for technical applications DPPC210000, DPPC210000

Note: non-CAREL active probes can be connected to the controller.

_________________________________________________________

CONTROL WITH TWO ACTIVE TEMPERATURE PROBES

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main active room probe to terminals M2.1, M2.2 (GND)

and M2.3 (+12Vdc);

• connect the second active probe to terminals M2.5, M2.3 (+12Vdc) and

M2.6 (GND);

Note: when using Carel 0-10V probe, connect the probe power

supply +(G) to terminal “G” on the board rather than terminal M2.3.

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

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ENG

• to enable control, set:

Screen Screen desc. Parameter

Ea01 Control type Temperature (two probes)
Ea02 Control with 2 probes Set the weight of the two probes (0-100%)
Ea05 Modulating control Set: temperature set point (0-100 °C) (32-212°F)

Ec01 Main probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA
Ec02 Second probe type Select from: 0-1V, 0-10V, 2-10V, 0-20mA, 4-20mA

diff erential (2-20°C) (3.6-36°F)
Minimum production (0-100%)
Maximum production (0-100%)

The controller will calculate the weighted average between the two
probes. The weight of the two probes can also be set.

M2M9 M8

1 12345678212

OUT H / T

M

+ (G)

Main probe

OUT H / T

M

+ (G)

Second probe

Fig. 4.z

The following probes can be connected:

CAREL probes for rooms DPWC111000
for air ducts DPDC110000; DPDC210000
for technical applications DPPC210000, DPPC210000

Note: non-CAREL active probes can be connected to the controller.
_________________________________________________________

CONTROL WITH ONE NTC TEMPERATURE PROBE (passive)

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main NTC room probe to terminals M2.1, M2.2;

• to enable control, set:

Screen Screen description parameter

Ea01 Control type one temperature probe
Ea05 Modulating control Set: temperature set point (0-100 °C) (32-212°F)

Ec01 Main probe type Set probe type: NTC

diff erential (2-20°C) (3.6-36°F)
Minimum production (0-100%)
Maximum production (0-100%)

The controller will calculate the weighted average between the two
probes. The weight of the two probes can also be set.

1 12345678212

M2M9 M8

Fig. 4.ab

4.8 Alarm contact

The humidifi er controller is fi tted with a relay contact for remote signalling
of one or more faults or alarms. The alarm contact (250 Vac; max capacity: 2
A resistive - 2 A inductive) is connected to terminals M6.1, M6.2 and M6.3.

M1 M5 M6M12

132 31212 12

CO

NC

NO

N

L

Fig. 4.ac

M6.1 CO - Alarm common
M6.2 NC - NC alarm contact
M6.3 NO - NO alarm contact

4.9 Production request analogue output

The humidifi er controller is fi tted with an analogue output (0-10 V signal)
that refl ects the production request.
The production request output (0-10 V max 10 mA) is connected to
terminals M8.1, M8.2.

M2M9 M8

1 12345678212

1 12345678212

M2M9 M8

Fig. 4.aa

_________________________________________________________

CONTROL WITH TWO NTC TEMPERATURE PROBES (passive)

• short-circuit terminals M2.7 – M2.8 (jumper) to enable production;

alternatively connect terminals M2.7 – M2.8 to a remote contact (e.g.:
switch, timer,...);

• connect the main NTC room probe to terminals M2.1, M2.2;

• connect the second NTC probe to terminals M2.5, M2.6;

• to enable control, set:

Screen Screen description parameter

Ea01 Control type Modulation with two temperature probes
Ea02 Control with 2 probes Set the weight of the two probes (0-100%)
Ea05 Modulating control Set: temperature set point (0-100 °C) (32-212°F)

diff erential (2-20°C) (3.6-36°F)
Minimum production (0-100%)

Maximum production (0-100%)
Ec01 Main probe type Set probe type: NTC
Ec02 Second probe type Set probe type: NTC

Fig. 4.ad

M8.1 Production request analogue output
M8.2 GND

IMPORTANT WARNINGS: to avoid unbalanced control, the earth
of the probes or external controllers must be connected to the unit
controller’s earth.

4.10 Final checks

The following conditions represent correct electrical connection:

1. mains power to the humidifi er corresponds to the voltage shown on

the rating plate;

2. the fuses installed are suitable for the line and power voltage;

3. a mains disconnect switch has been installed so as to be able to

disconnect power to the humidifi er;

4. the humidifi er has been correctly earthed;

5. the power cable is fastened to the tear-proof cable clamp;

6. terminals M2.7, M2.8 are jumpered or connected to an enabling

contact;

7. if the humidifi er is controlled by an external controller, the signal

earth is electrically connected to the controller earth.

23

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0-10V

ENG

5. PREPARING FOR OPERATION

5.1 Preliminary checks

Before starting the humidifi er, check that:

• the water and electrical connections are made and the steam

distribution system is confi gured according to the instructions
contained herein;

• the shut-off tap for water into the humidifi er is open;

• the power fuses are installed and intact;

• terminals M2.7 and M2.8 are connected by jumper or connected to the

remote ON/OFF contact, and that the latter is closed;

• the probes or the external control device are correctly connected (and

that the earth of these devices is electrically connected to the earth of
the main control board);

6. STARTUP AND USER INTERFACE

Once having completed the operations listed in chapter 5. “Preparing for
operation”, the humidifi er can be started.

6.1 Start-up

After having closed the disconnect switch on
the humidifi er power line, switch the appliance
on by moving the switch on the front panel
to I, “ON”. The activation sequence will start,
which includes an initial phase, an autotest
phase and fi nally actual operation. Each phase
in the activation sequence is identifi ed by a
diff erent display.

6.2 Activation sequence

1. STARTING THE APPLICATION THE FIRST TIME

The “heaterSteam” humidifi er logo is displayed. When starting the fi rst
time (commissioning), the menu language needs to be selected:

1. English 3. Deutsch 5. Español 7. Chinese

2. Italiano 4. Francais 6. Russian 8. Czech

Press UP/Down to select the number corresponding to the desired
language and press ENTER to confi rm. This screen is displayed for 60
seconds.

2. FIRST START-UP (WIZARD)

When starting the fi rst time, a wizard is displayed to quickly set the main
unit parameters. The wizard comprises nine steps (some of which may
not be displayed, if not necessary):

• 1/9 - model (only if the replacement controller is not confi gured):

select and set the parameters relating to the model (size, voltage,…);

• 2/9 - water hardness: auto or user-defi ned. If choosing “auto”, the

controller automatically sets the water hardness, based on feedwater
conductivity;

• 3/9 - manual water hardness setting. The possible options are:

Demineralised, maintenance at 3000h (hours)

1. 0-10°F, maintenance at 3000h (hours)

2. 10-20°F, maintenance at 1500h (hours)

3. 20-30°F, maintenance at 1000h (hours)

4. 30-40°F, maintenance at 800h (hours);

• 4/9 - control type: external On/Off signal, proportional to external

signal with limit probe, proportional to external signal, one humidity
probe, one temperature probe, one humidity probe and limit probe,
one temperature probe and limit probe, two temperature probes
(average), two humidity probes (average);

• 5/9 – select the main room probe type: 0-1V (active), 0-10V (active),

2-10V (active), 0-20 mA (active), 4-20 (active), NTC (passive);

I

0

Fig. 6.a

ON

• the steam outlet pipe is not choked;

• in the event of ducted humidifi cation, the operation of the humidifi er

is slave to the operation of the air fan (replacing or in series with the
remote ON/OFF contact);

• the distributor condensate return pipe is installed and free;

• the drain pipe is correctly connected and free.

Important: before starting the humidifi er, check that it is in
perfect condition, that there are no water leaks and that the

electrical parts are dry.

• 6/9 – select the limit probe type: 0-1V (active), 0-10V (active), 2-10V

(active), 0-20 mA (active), 4-20 (active), NTC (passive);

• 7/9 - set the limits for the active probes.

Room min (%): set the minimum relative humidity limit rH% for the
main probe;
Room max (%): set the maximum relative humidity limit rH% for the
main probe;
Limit min (%): set the minimum relative humidity limit rH% for the limit
probe;
Limit max (%): set the maximum relative humidity limit rH% for the
limit probe;

• 8/9 - set the drain to dilute cycles: auto or user-defi ned. If choosing

“auto”, the controller automatically sets the number of evaporation
cycles that must occur between two consecutive drain to dilute
cycles. This setting is based on the feedwater conductivity read by
the conductivity meter, thus reducing the use of water, reducing
maintenance and extending cylinder life;

• 9/9 - manual drain to dilute cycle setting. Enter the number of

evaporation cycles before forcing a dilution cycle.

At the end of the guided procedure, a message prompts whether to
show the wizard again when next starting? Yes/no

3. AUTOTEST PROCEDURE

Indicated on the display by the unit status shown as “AUTOTEST”.
Whenever the humidifi er is started (switch moved from OFF to ON),
an autotest procedure is run by default to check operation of the level
sensor and the appliance as a whole.
The autotest procedure involves a water fi ll cycle to above the high level
(green LED), followed by a drain cycle until below the minimum level
(red LED). The procedure then refi lls the unit with water in order to restart
production (if required).

Note: in the event of malfunctions, the contactor is deactivated and

the corresponding alarm is shown.

Note: all the screens in the wizard (except for the language selection

screen) remain on the display until the user enters the settings.

4. OPERATION

The humidifi er starts operating and the standard display is shown. If an

alarm is active, the corresponding icon
“Alarm table” for the complete list and description.

comes on red, see chapter 13

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

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ENG

Selecting and con guring the model (only for replacement controllers
that are not con gured): if needing to replace the controller only

(heaterSteam process version spare part URH00000P4, heaterSteam
titanium version spare part URH00000T4), the fi rst time the controller is
powered on, the model will need to be set (capacity and power supply).

6.3 Shutdown

• To avoid stagnation, drain the water from the

cylinder by pressing UP and DOWN together
for 5 seconds; to stop the drain cycle, press
ESC.

I

OFF

0

• move the switch to 0, “OFF”.

Fig. 6.b

6.4 Graphic terminal

The 4.3” touch graphic terminal has a graphic interface with coloured and
animated icons. The contents of the display can be scrolled up and down
simply and intuitively.

Fig. 6.c

The 6-button keypad provides simplifi ed access to all the confi guration
and programming operations:

Pos. Function Pos. Function

1 System menu 6 Alarm list
2 home 7 ON/OFF
3 Scheduler settings 8 Set point setting
4 System date and time 9 System information
5 Notifi cation centre 10 Descriptive icon of humidifi er

status

Tab. 6.a

6.5.1 System menu

The System menu provides access to the system items that are available
without entering a password.

Fig. 6.f

Description of the menus:

Menu Description

Clock Date and time setting
Input/Output Display the analogue and digital inputs/outputs
Graphs Display historical and real-time operation of the humidifi er
Functions Special and manual functions
Scheduler Manage scheduling of working time bands
Alarm thresh­old
Language
Settings Access advanced humidifi er confi guration (Installer password 77).

Set the alarm thresholds

Set the menu language

Menu: E. Settings.
Change unit of measure (Imperial/International)

Tab. 6.b

Fig. 6.d

6.5 Touch display

“HOME” menu

The “HOME” menu comprises information on the probes, including the
set point or external request signal.

6.5.2 Scheduler settings

Set the time bands for humidifi er activation. After enabling the scheduler,
six on/off time bands can be set for each day. Use the copy button to
copy the set time bands from one day to the next.

Fig. 6.g

Fig. 6.e

25

Fig. 6.h

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

ENG

ON/OFF

Switch the humidifi er on and off

Fig. 6.i

Fig. 6.j

6.5.3 Set point setting

Set the set point, proportional band and maximum production

button function

(1) alarm list and reset any active alarms
(2) PRG return to the “main” screen

(3) ESC return to the previous screen/display

(4) UP cyclically scroll the screen menu, parameters and parameter

(5) ENTER select and confi rm

(6) DOWN cyclically scroll the screen menu, parameters and parameter

from the “main” screen, access the main menu

access notifi cations (from main menu only)

values
from the “main” screen: access the INFO screens

from the main menu: access the “SET” screens

values
from the main screen, access the INFO screens

6.6.1 Display

1

2

3

Key to the graphic areas on the display

1 Current date/time
2 Probes/request
3 Notifi cation centre
4 Unit status
5 Quick access menu
6 Unit status icon

4

Fig. 6.n

5

6

Fig. 6.k

6.5.4 System information

Menu providing humidifi er status, software and hardware information.

Fig. 6.l

6.6 Keypad

1

2

3

6

Fig. 6.m

6.6.2 Display graphic area 2 - Probes/request

The “Probes/request” graphic area displays the production request and
the values read by the probes. For each control type there is a specifi c
display, as described below:

• control proportional to an external signal and proportional to an

external signal with limit probe the request is displayed; for example:

• ON/OFF signal: the request status is displayed, ON or OFF

• humidity (single probe) and temperature control (single probe):

only the value read by the main probe is displayed; for example:

• humidity control with limit and temperature with limit: the values

read by both probes are displayed, the main value in the centre and
the limit at the bottom; for example:

Value read by the main probe
Value read by the limit probe

• humidity control (two probes) and temperature (two probes):

the two values read by the probes and their weighted average are
displayed; for example:

4

5

Weighted average

Value read by the fi rst probe

Value read by

the second

probe

• with wireless probes: the same as in the previous case, but with the

diff erence that the two values at the bottom are displayed as averages
of the probe readings, and their total weighted average is shown in the
centre (main probe).

• Master/Slave: the total request of the Master/Slave system is displayed;

when the Master/Slave system is present, this is indicated by: “Network”.

“heaterSteam” +0300087EN - rel. 1.3 - 14.02.2020

26