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Vemer S.p.A.

I - 32032 Feltre (BL) • Via Camp Lonc, 16

Tel +39 0439 80638 • Fax +39 0439 80619
e-mail: [email protected]  -  web site: www.vemer.it 

MKIS00916-010-EN

Mod.

 HUMI

Electronic flush-mounting humidistats for humidity regulation which performs 
actions of type 1B and intended for operating in environments with Pollution 
Degree 2 and Overvoltage Category III (EN60730-1).

Codel  

Model 

Description

VE379400

 

Humi 

Electronic flush-mounting humidistat 230V

SAFETY WARNINGS

 

 During product installation and operation it is necessary to observe the 
following instructions:

1)    The device must be installed by a qualified person, in strict compliance with the 

connection diagrams.

2)   Do not power or connect the device if any part of it is damaged.
3)    After installation, inaccessibility to the connection terminals without appropriate 

tools must be guaranteed.

4)    The device must be installed and activated in compliance with current electric 

systems standards.

5)   Before accessing the connection terminals, verify that the leads are not live.
6)    In the electrical system of the building where the instrument must be installed, 

a protection device from the overcurrents must be present.  

TECHNICAL SPECIFICATIONS

•   Power supply:
  – 230Vac (-15% ÷ +10%) 50/60Hz
  – absorption: 4VA (0.5W)
•  Installation on 3 modules box (503 type)
• Terminals:
  – 3 terminals for 1.5 mm2 cables for bistable output relay 5A / 250 Vac
  – 2 terminals for 1.5 mm2 cables for power supply
•  Output: bistable relay 5 (3) A / 250Vac
•  Minimum time between a switching and the next one: 1 minute
•  Regulation type: on/off with fixed differential of ± 2.5% RH
•  Regulation range: 30% ÷ 90% RH
•  2-position selector switch: always off, automatic
•  Operating humidity: 20÷90% non condensing
•  Protection degree: IP40
•  Insulation: reinforced among accessible parts (frontal) and all other terminals
•  Mechanical locks on the knob to limit the setpoint

The humidistat signals the error probe condition by blinking the led 2 times 

per second.

In this case the regulation is inhibited and the relay contact remains 

between terminals 2 and 3. Contact the Technical Service.

REFERENCE STANDARDS

Compliance with Community Directives

2014/35/EU (LVD)

2014/30/EU (EMCD)

is declared with reference to the following harmonized standards:

EN 60730-1 • EN 60730-2-13

•  Install the humidistat at a height of about 1.5 m above the floor, away from 

direct sunlight, away from doors, windows, heat sources, locations with 
excess or total lack of ventilation.

•   The device is sold already mounted with 

anthracite colour. To transform it in the 
white version, remove the knob and the 
cover, acting on the hooks placed on 
the upper and lower side of the device 
and mount the cover and the white knob 
included in the package.

•  Make the connections by respecting the 

diagrams described in this manual.

•  Use the selector switch to turn on or off the humidistat: 

- position 0: humidistat off, no regulation 

-  position |: humidistat switched on, active regulation for detected 

humidity values exceeding the set value

•  Use the knob to set the desired 

humidity level.  

It’s possible to set values between 

30% RH and 90% RH. 

When the humidity value present 

in the room exceeds the  

set value, the red led lights up 

and the relay switches between 

contacts 1-2.

Note: In order to preserve the life of the system, the minimum time between 

a relay switching and the next one is 1 minute. However, the led status 

updating is immediate. Therefore, after using the regulation knob, it is 

possible to find a discrepancy between what is indicated by the led and the 

actual status of the relay. This condition lasts for up to 1 minute. 

The device has two ring nuts to limit mechanically the range of settable 

values if the humidistat is installed in public places or in hotel rooms.

To limit the range, proceed as follows:

-  Set the knob in an intermediate value of the desired range

-  Remove the knob.

-   Under the knob there are two ring nuts marked by the word “min” and 

“MAX”, respectively for the lower and upper limit.

-   Turn the “min” ring nut clockwise and “MAX” anticlockwise until the 

minimum value range (see the humidity values reported on the cover).

-   Turn the “MAX” ring nut anticlockwise and until the maximum value 

range (see the humidity values reported on the cover).

-   Replace the knob, making sure that the indicator of the setpoint on the 

knob is in the same position when the knob has been removed.

To remove the limitation to the setpoint and reset the range 30% ÷ 90% RH 

turn the two ring nuts up to bring the locks of limitation in a position outside 

the range 30% ÷ 90% RH.

•  Fix the device inside the 3 modules box in compliance with the assembly diagrams 

described on the back of this instruction sheet. The accessories for the installation 
included in the package allow the mounting of the plates described in the diagram 
“adjustable cover plates” and they are:

  - A mount 
  - B mount (it could be necessary to remove the side cogs)
  -  AIR mount
  - couple of side BM plastic elements (both of white colour and grey colour)
  - couple of side VI plastic elements (both of white colour and grey colour)
  - covers and knobs of white colour and anthracite grey colour.

The adapters inside the box allow the monitoring of the following cover plates:

For information about the possibility to adapt the humidistat with different 
cover plates from those listed, contact the Technical Service.

* through mount that you can buy on request (code VE767500)
• All the above trademarks are the property of their respective owners.

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10-2017

User Manual

ELECTRONIC FLUSH-MOUNTING HUMIDISTAT

 

Read all instructions carefully

OPERATION

PACKAGE CONTENTS

WIRING DIAGRAMS

ADJUSTABLE COVER PLATES

INSTALLATION

Cover, knob and plastic elements are available in white and anthracite grey colours

humidistat

Covers

VI plastic

elements

BM plastic

elements

A mount

B mount

Setpoint modification

Error probe signal

AIR mount

C

O

M

NO

NC

N

L

230V

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Keo-A 

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2

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