Devatec ElectroVap RTH-HC Series Installation instructions manual

ElectroVap® HUMIDIFIERS
RTH-HC Series
Instruction & Operation
Manual

ELECTROVAP®RTH-HC
2
Contents
1. SAFETY INSTRUCTIONS 3
1.1 INTRODUCTION 3
1.2 IMPORTANT REMARKS 4
1.3 DECLARATION OF CONFORMITY 5
1.4 ROHS DECLARATION 5
2. PRODUCT PRESENTATION 6
2.1 CHARACTERISTICS 6
2.2 SIZE 7
2.3 HUMIDIFIER COMPONENT PARTS 8
2.4 IMPORTANT INSTRUCTIONS 9
3. INSTALLATION 10
3.1 PROCEDURE 10
3.2 WATER SUPPLY 11
3.3 DISPERSION TUBE POSITIONING 12
3.4 STEAM OUTLET 17
3.5 CONDENSATE DRAINING WITH SIPHON 18
3.6 DRAIN HOSE CONNECTION 19
3.7 ELECTRICAL CONNECTIONS 21
3.8 ELECTRICAL WIRING 22
3.9 OPTION : TRANSFORMER CONNECTION 42
4. COMMISSIONING 43
5. SYSTEM MANAGEMENT 44
5.1 STATUS MENU (READ ONLY) 44
5.2 SETUP MENU 46
5.3 CONTROL SYSTEM MENU 47
5.4 CHANGE SETTINGS MENU 49
5.5 MAINTENANCE ALERTS 52
5.6 DEFAULT MESSAGE 53
6. MAINTENANCE 58
6.1 STAINLESS STEEL TANK 58
6.2 DRAIN VALVE 59
6.3 WATER INLET VALVE 60
6.4 WATER LEVEL DETECTOR 60
7. SPARE PARTS 61
7.1 STAINLESS TANK 61
7.2 WATER INLET VALVE 62
7.3 WATER LEVEL DETECTOR 62
7.4 DRAINING CIRCUIT 62
7.5 ELECTRICAL PART 62

ELECTROVAP®RTH-HC
3
1. SAFETY INSTRUCTIONS
1.1 INTRODUCTION
You recently purchased the ElectroVap® RTH-HC, and we hope you enjoy this product. Thank you for the trust you
place in us. The safety instructions contained in this manual are intended for specialized, qualified, and authorized
personnel.
To get the best results from the humidifier, we recommend to:
• Read carefully the assembly and installation instructions in this manual;
• Keep this manual in a safe place for future reference;
• Transmit this manual in case of sale or transfer of the device, in order to guarantee the transmission of information
about it;
SAFETY WARNINGS AND SYMBOLS USED IN THE MANUAL
Danger! Caution.
General safety instruction, whose violation could lead to malfunctions and / or bodily harm
to person and / or property damage.
Danger! High voltage.
There are high voltages inside the device or one of its components, the negligence of this
warning can lead to serious bodily injury or death to people and / or significant material
malfunctions.
Danger! High temperature.
The ElectroVap® RTH-HC uses steam during the operation and therefore surfaces and pipe-work
become very hot. Ensure that equipment not sustaining high temperatures is kept away.
Electrostatic hazard.
The components of the device may be subject to deterioration as they are very sensitive to
electrostatic discharge.
Möbius strip.
Some components of the device are recyclable, the user is responsible for the removal of these.
Follow the recycling recommendations adapted to the materials according to the geographical
area.
• If your package is damaged or missing, please make a complaint to your carrier with a receipt acknowledgment letter
within 24 hours and make a declaration to your Devatec agent.
• Pictures, graphics, and values may be subject to technical changes without notice.
• Keep this instruction manual carefully, and if you have any questions that are not answered in this manual, do not
hesitate to contact us or consult your Devatec agent.
Our team will be pleased to be of assistance!

ELECTROVAP®RTH-HC
4
1.2 IMPORTANT REMARKS
GENERAL
This manual is a translation of the original French version. It contains all the details
concerning the commissioning, operation, and maintenance of the device.
Maintenance, service, repairs, as well as the study of the risks and dangers associated
with these operations must be carried out by qualified, competent, and authorized
personnel.
- Make sure that all risks or dangers are defined beforehand by an authorized person,
especially
for works-at-height.
- We also recommend installing a security perimeter.
- Make sure that the power supply is switched off before performing maintenance.
- Please screw periodically all the connection terminals of the power cable.
INTENDED USE
This device is manufactured by Devatec is intended solely for humidification purposes,
in air treatment station or in ambiance. The user undertakes to use it according to the
safety instructions given in this manual.
Improper use could result in serious hazards and damages to the user, third parties and
materials.
STORAGE &
MAINTENANCE
The device must be stored in a dry, frost-free place, protected from shocks and
vibrations. Maintenance must be carried out by at least two people or suitable lifting
equipment.
WATER
Steam humidifiers can be used with potable, demineralized, or softened water. It is
absolutely forbidden to inject a chemical into the hydraulic system. Make sure that the
water supply pressure does not exceed 6 bar. Always be careful that the installation
meets local standards.
ELECTRICITY
The user ensures that electrical installation will be carried out by an authorized
technician in this field. The installer must provide the correct cable section as well as
the magnethermic circuit breaker protection, adapted to the regulations in force in the
country of installation.
WARRANTY
Devatec guarantees that its devices are one (1) year warranty.
Devatec’s liability will be limited exclusively to Devatec’s repair or replacement of the
part or product, excluding labor, disassembly, or installation costs. Devatec may also
decide to refund the purchase price of the product or part of it, at its discretion. The
non-compliance of these above recommendations, additional mounting and / or
transformation with components other than those provided with the device or any use
other than what is explicitly stated, shall be considered as not in compliance with the
prescriptions, and will invalidate the warranty.
LIABILITY
Devatec shall be not made liable for the consequences of incorrect installation,
improper use of the devices and/or their components.
We are committed to provide you the most complete manual, although, in the air
treatment field, variations are so common that the information found in this document
may be subject to changes without notice.

ELECTROVAP®RTH-HC
5
1.3 DECLARATION OF CONFORMITY
This device meets the requirements of the
following European Directives:
2014/30/UE
2014/35/UE
DEVICE TYPE
Humidifier
MODEL NAME
RTH-HC
MANUFACTURER
Devatec
185 Boulevard des Frères Rousseau
76550 Offranville - FRANCE
We the undersigned, hereby declare that the equipment specified above conforms to the above Directive(s) and
Standard(s). Valid for units with serial number starting from n° 600 001
FRAMBOT Jean-François
General Manager
20/10/2020
1.4 ROHS DECLARATION
Devatec,
Confirms that the ElectroVap® RTH-HC humidifier is manufactured in compliance with the following European
regulations:
2011/65/UE
This guideline regulates, after July 1st 2006, the use of mercury, cadmium, lead (soldering processes), chrome VI as
well as PBB and PBDE.
MINFRAY Jean-Marie
R&D Engineer
20/10/2020

ELECTROVAP®RTH-HC
6
2. PRODUCT PRESENTATION
2.1 CHARACTERISTICS
The RTH-HC humidifier is an electric humidifier, designed for air humidification in air handling unit. Like all the other
humidifiers of the range, it is compatible with the Blower Pack.
Standard delivery includes:
1. Steam humidifier
2. Technical documentation
3. 3 hose clamps (2 for the steam hose and 1 for the drain hose)
ACCESSORIES (Not supplied)
•Stainless steel steam dispersion tubes
•ExpressPack®
•BlowerPack fan unit
•Steam and condensate hose
•Duct or room humidity sensor
•High Limit Humidistat
•Stainless steel braided hose in 3/4" FF (with
gaskets) for connection to water network.
•Drain hose
•Remote information board
•Filling cup extension
•Transformer 380-690V/1x230V
•Additional cooling kit
•Outdoor protective cabinet
•Mounting bracket
•Collecting water tank
•Bluetooth kit for mobile application
Fig. 2-1. Humidifier

ELECTROVAP®RTH-HC
7
2.2 SIZE
RTH-HC 5-50
RTH-HC 60-100
Number of steam outputs
1
2
Dimension [mm] / [in]
A: Width
690 / 27.2
1130 / 27.2
B: Height
775 / 30.5
775 / 30.5
C: Depth
350 / 13.8
350 / 13.8
D: Cabinet Height
755 / 29.7
755 / 29.7
E1: Steam outlet position
362 / 14.25
351 / 2
E2: Steam outlet position
165 / 6.5
165 / 6.5
E3: Distance between steam outlets
592 / 23.3
G1: Drain water position
627 / 24.7
616 / 24.25
G2: Drain water position
164 / 6.5
164 / 6.5
H1: Water inlet position
582 / 22.9
702 / 27.7
H2: Water inlet position
261 / 10.3
261 / 10.3
I: Overflow Diameter
12 / 0.48
12 / 0.48
J1: Overflow Position
642 / 25.3
861 / 33.9
J2: Overflow Position
32 / 1.26
32 / 1.26
K: Steam output diameter
$60 / 2.36
$60 / 2.36
Mass [kg] / [lb]
Weight in operation
75 / 166
140 / 309
Gross weight (packed)
45 / 100
70 / 155
Fig. 2-2. Humidifier sizes

ELECTROVAP®RTH-HC
8
2.3 HUMIDIFIER COMPONENT PARTS
1
Steam hose
2
Filling cup
3
Display board
4
Main board
5
Contactor
6
Fuse holders
7
3 relay board (optional)
8a
Transformer 2x115 / 2x12V S: 50VA
8b
Option: Transformer UL
9
ON/ OFF Switch
10
Power rail
11
Identification label
12
Inlet valve
13
Funnel
14
Overflow hose
15
Drain valve
16
Filling hose
17
Tank
18
Water level sensor
19
Heater
20
Water level hose
21
Static relay
22
Fan
Fig. 2-3. Humidifier component parts

ELECTROVAP®RTH-HC
9
2.4 IMPORTANT INSTRUCTIONS
•Ambient temperature: between 5 and 40°C
•Ambient humidity: < 80% Relative humidity
•Back side: this component heats during operation (up to 60°C). Make sure that the support of the device is
not made of a heat-sensitive material.
•Wall mounting: Please be careful that the support material receiving the device (pillar, wall, etc.) can support
it.
•Fixation: use a fastening system adapted to the support material.
•Make sure that the mounting distances are met.
Please read and follow the enclosed safety information and the warning labels inside the humidifier
before installation or maintenance.
Some steps can be dangerous.
Visit our website or contact our operators for technical support.
Fig.2-4. Mounting distances

ELECTROVAP®RTH-HC
10
3.INSTALLATION
3.1 PROCEDURE
•Mark and drill where indicated (holes size depends on the selected dowels and support materials).
•Put the dowels in the holes.
•Screw the top screws into the dowels (M6 recommended), let them protrude by about 10 mm/0.39in.
•Hang the device to the top screws and align it vertically and horizontally with a bubble level.
•Tighten up all 4 screws.
RTH-HC
5 - 50
RTH-HC
60 - 100
RTH-HC
5 - 50
RTH-HC
60 - 100
[mm]/ [in]
[mm]/ [in]
Has
640 / 25.2
1000 / 39.4
B
580 / 22.8
580 / 22.8
A1
500 / 19.7
B1
81 / 3.2
81 / 3.2
A2
22 / 0.86
61 / 2.4
B2
23 / 0.9
23 / 0.9
A3
201 / 7.9
150 / 5.9
B3
53 / 2.1
53 / 2.1
A4
310 / 12.2
310 / 12.2
A5
249 / 9.8
Fig. 3-1. Installation holes

ELECTROVAP®RTH-HC
11
3.2 WATER SUPPLY
3.2.1 Recommendation
Our device is designed to be used with any following water type:
✓drinking water (according to Directive 98/83/EEC),
✓softened water,
✓demineralized water, reverse osmosis water
The demineralized water is corrosive; use appropriate piping material: stainless steel, PVC.
Softened water: Its use is not necessary, but possible. TH 12°fH minimum.
Water analysis is recommended to determine the level of sodium chloride.
Do not hesitate to contact our services for support.
3.2.2 Recommendations on connection
Network water pressure: The pressure must be stable and between 2 bar and 8 bar MAX.
Network water temperature: < 40 °C.
Please note that the water supply is connected at the lower part of the unit.
For easy maintenance, the water inlet valve is equipped with a filter strainer which should be checked periodically. It
is essential to install an isolation valve near the humidifier to facilitate maintenance.
OVERFLOW RISKS: it is recommended to install a collecting water tank under the humidifiers to
prevent overflow. This is essential if the unit is installed in false ceilings or above important rooms
(example: museum room, showroom, laboratory etc.). Make sure the container is connected to the
wastewater system.
An excess of sodium chloride may generate foam which disturbs the correct running of the humidifier.
It is essential to install a duplex softener.
Max. chloride content: 80 mg/l
Water system
Fig. 3-2. Humidifier water supply
Flexible braided hose
with 3/4” FF thread
Isolation valve

ELECTROVAP®RTH-HC
12
3.3 DISPERSION TUBE POSITIONING
Steam dispersion tubes:
the steam from the humidifier is injected in a duct or an air handling unit via a steam dispersion tube. To obtain the
best performance of the humidifier, select the longest pipe.
Fig. A 3-3. Steam dispersion tubes positioning
Spirit level
Threaded rod

ELECTROVAP®RTH-HC
13
3.3.1 Absorption distance "D"
Make sure that the absorption distance is met to let the air absorb the steam dispersed by the tubes. In this
absorption distance, the steam is still visible in the air stream in the form of fog. If any furniture is placed in this area,
condensate may occur. For this reason, it is imperative to consider this absorption distance when placing the
humidifiers.
3.3.2 How to calculate absorption distance « D »
In order to determine the absorption distance, the attached calculation table can be used:
▪RH1 = relative humidity of air before humidification in %.
▪RH2 = relative humidity of air after humidification in %.
▪D mini = minimum absorption distance in meters (m).
Inlet RH1 [%]
5
10
20
30
40
50
60
70
Outlet RH2 [%]
Minimum absorption distance "D" [m]
40
0,9
0,8
0,7
0,5
-
-
-
-
50
1,1
1
0,9
0,8
0,5
-
-
-
60
1,4
1,3
1,2
1
0,8
0,5
-
-
70
1,8
1,7
1,5
1,4
1,2
1
0,7
-
80
2,3
2,2
2,1
1,9
1,7
1,5
1,2
0,8
90
3,5
3,4
3,2
2,9
2,7
2,4
2,1
1,7
This calculation table is to be used for temperatures between 20°C and 25°C (68°F to 77°F) (Maximum air speed 5m/s).
For calculated distances, contact your Devatec agent.
3.3.3 Minimum absorption distance
The steam dispersion pipes must be positioned after the minimum specified absorption distance. Please follow the
guidelines depending on the configuration of your air handling unit.
Fig. B 3-3. Before/after a fan
Fig. C 3-3. Before/after heating battery or filter
1.5 x D before a particle filter or absolute filter
= Dispersion tube
D
D
1.5 x D
5 cm

ELECTROVAP®RTH-HC
14
3.3.4 Minimum installation distances
•A high limit humidistat must be installed in the duct to stop the humidifier in case the level of humidity exceeds
the preset value.
•If the recommended distances cannot be met, please contact Devatec or their authorized agent for an
alternative solution.
•Make sure the distances are met, if this is not possible, please contact your Devatec agent.
1) Before a junction
2) Before an air grid
3) Before a humidity
sensor
4) Before/after
strangulation
5) Before enlargement
6) Before a bend
Fig. D 3-3. Installation distances
D
D
5 x D
0.5 x D
0.5 x D
D

ELECTROVAP®RTH-HC
15
Make sure that spaces and distances are respected. If you have any doubts about the calculation, please contact us.
H1 = 110 mm = Minimum height between the duct floor and the axle of the steam pipe.
H2 = 140 mm minimum for a standard mounting / 110 mm minimum for a stair mounting.
H3 = 160 mm = Minimum height between the axle of the dispersion tube and the top of the duct wall.
The H3 distance can be 80 mm at the shortest if the steam pipe is installed at a 30° angle.
In the case of a stair mounting, minimum distance between tubes = 100 mm.
Air flow direction
Fig. E 3-3. Minimum heights & flow directions

ELECTROVAP®RTH-HC
16
Fig. H 3-3. d = Diameter of the duct
Fig. I 3-3. D = Distance between two tubes
Fig. F 3-3. Vertical ducts
In vertical ducts where the air flow is upward or
downward, the steam distribution pipe(s) must
be tilted by 15° sideways
Fig. G 3-3. Ducts with limited height
In ducts with limited height, the distribution
pipe(s) can be tilted by 30° to get the 80 mm
minimum height

ELECTROVAP®RTH-HC
17
Ø 300 mm min./
12’’ min.
3.4 STEAM OUTLET
1. Preferably use a flexible steam hose that is resistant to a temperature of 100°C.
NB: when new hoses are installed, a smell of burnt plastic may be smelt during the first running of the steam
humidifier. This is normal and will eventually diminish.
2. Steam hose selection:
Model
RTH-HC
5 to 50
RTH-HC
60 to 100
Number of steam outlets
1
2
Steam outlet diameter
Ø 60
Ø 60
3. RTH-HC humidifiers can operate with a pressure (P) higher than the atmospheric pressure in the ducts, but under
the following conditions:
•If P is less than 220 mm WC or 2157 Pa.
•If P is greater than 220 mm WC (2157 Pa), options are available up to 1200 mm WC (11 768 Pa).
4. For the installation of the steam hose, depending on your environment, please respect the recommendations
below and use the appropriate tangential hose clamps.
•Flexible steam hose length 3 m max.
•Stainless steel or copper pipe with a slightly larger diameter, grounded. Use a flexible steam hose cuff to connect
the humidifier to the steam distribution pipe. The length of the pipe must be thermally insulated and should not
exceed 6 m.
Always have a slope in the same direction (up or down); the steam hose must
be free of kinks and sags to allow for gravity drainage of condensate.
Make sure that the steam hose is not leaky. Failure to follow these instructions
can lead to serious malfunctions.
Radius of the diameter steam pipe:
•Ø 60 - 600mm minimum
Fig. B 3-4. Additional drip leg when steam distribution
below humidifier
Fig. A 3-4. Standard installation

ELECTROVAP®RTH-HC
18
3.5 CONDENSATE DRAINING WITH SIPHON
The condensate hose must not be directly connected to the public sewerage network.
H min. (mm) = P (Pa)/10
with P = absolute pressure of the air handling unit or the ventilation duct
Fig. A 3-5.
Fig. B 3-5.

ELECTROVAP®RTH-HC
19
3.6 DRAIN HOSE CONNECTION
The following drawing shows the drain hose connection that should be made.
Use a Ø 40 mm rubber drain hose with the 2 supplied hose clamps, heat-resistant (up to 100°C).
Connect the hose to the draining system. Regular replacement is recommended.
If rigid piping is used, it must be a heat-resistant PVC material (up to 100 °C).
The discharge hose must be free from any obstacle.
It is recommended that each humidifier has its own drain pipe.
If possible, use a collecting water tank with a lid (see the picture below).
Fig. A 3-6. Example of Installation
Drain hose (optional)
Collecting water tank (optional)
Condensate hose (optional)
Pipe - minimum Ø 60mm (optional)

ELECTROVAP®RTH-HC
20
A funnel can also be used (see picture below), but it should be offset from the underside of the unit to prevent
any steam and/or condensation from getting into the cabinet.
CAUTION: keep a minimum downward slope of 10° for both the draining & overflow hoses of the humidifier
and for the general drain pipe.
Fig. B 3-6. Example of Installation with funnel