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OPERATION
User Manual
ELECTRONIC THERMOSTATS
Read all instructions carefully
PACKAGE CONTENTS
WIRING DIAGRAMS
ADJUSTABLE PLATES
INSTALLATION
2
Setpoint modification
Operating mode setting
Depleted batteries signal
(for Keo-B only)
Error probe signal
Night reduction
(for Keo-B only)
When the battery is almost depleted, the yellow LED turns on for half a second
every 10 seconds. In this condition it is necessary to replace the batteries as
soon as possible.
Dispose of the batteries in the appropriate
recycling containers.
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230V
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EXTERNAL
CONTACT
Keo-A
Keo-B
EXTERNAL
CONTACT
Setpoint = Programmed setpoint
Setpoint = - 3°C programmed setpoint
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thermostat
Cover, knob and plastic elements are available in white and anthracite grey colours
Covers
A mount
B mount
VI plastic
elements BM plastic
elements
Regulation type setting
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
MKIS00745-010-EN
Mod.
KEO-A
KEO-B
Flush-mounting electronic thermostats for temperature control both in
heating and cooling. They perform actions of type 1B and are intended for
operating in environments with Pollution Degree 2 and Overvoltage Category III
(EN60730-1).
•
Keo-B
, with battery power supply and an input for the connection of an
external contact with whom to reduce the setpoint of 3°C.
•
Keo-A
with mains power supply.
Code
Model
Description
VN170700
Keo-B
Battery thermostat with digital input
VN171500
Keo-A
230V Thermostat
SAFETY WARNINGS
During product installation and operation it is necessary to observe the
following instructions:
1) The instrument must be installed by a qualified person, in strict compliance
with the connection diagrams.
2) Do not power or connect the instrument if any part of it is damaged.
3) After installation, inaccessibility to the connection terminals without appropriate
tools must be guaranteed.
4) The instrument 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 (for Keo-A model
only).
TECHNICAL SPECIFICATIONS
• Power supply Keo-B: – 2 alkaline batteries 1.5V (AAA type)
– battery life: 12 months
– depleted batteries indication
• Power supply Keo-A: – 230Vac (-15% ÷ +10%) 50/60Hz
– max absorption: 6 VA / 230Vac
• Installation on 3 modules box (503 type)
• Terminals Keo-B:
– 3 terminals for 1.5 mm
2
cables for output relay 5A / 250 Vac
– 2 terminals for 1.5 mm
2
cables for digital input (3°C setpoint reduction)
• Terminals Keo-A:
– 3 terminals for 1.5 mm
2
cables for bistable output relay 5A / 250 Vac
– 2 terminals for 1.5 mm
2
cables for power supply
• Operating mode: summer/winter/off (with antifreeze)
• Regulation type:
– on/off with fixed differential (0.3°C)
– P8 proportional with 0.8°C band (-0.3 ÷ +0.5°C) and period 8 minutes
– P15 proportional with 1.5°C band (-0.7 ÷ +0.8°C) and period 15 minutes
• Measurement precision: ±0.5 °C
• Setpoint range: 5°C ÷ 35°C
• Operating temperature: 0°C ÷ +50°C
• Storage temperature: -10°C ÷ +65°C
• Operating humidity: 20÷90% non condensing
• Mechanism for instrument extraction of push-push type (batteries model only)
• Protection degree: IP40
• Insulation: reinforced among accessible parts (frontal) and all other terminals
• Mechanical locks on the knob to limit the setpoint
The thermostat signals the error probe condition by blinking the LED 2 times
per second.
In this case the regulation is inhibited and the relay contact is kept open.
Contact Vemer Technical Assistance.
REFERENCE STANDARDS
Compliance with Community Directives
2006/95/EC (Low voltage)
2004/108/EC (E.M.C.)
is declared with reference to the following harmonized standards:
• EN 60730-2-9
The Keo-B has an input to whom to connect an external contact (see wiring
diagrams).
With closed contact, the setpoint is reduced by 3°C than is set with the knob
(in heating mode only).
The adapters inside the box allow the mounting of the following
plates:
For information about the possibility to adapt the thermostat with different
plates from those listed, contact the Technical Assistance Service.
* by mount you can buy on request (code VE470100)
• All the above trademarks are the property of their respective owners.
ABB Chiara series
ABB Mylos series
Ave S44 series
Bticino Axolute series
Bticino Light series
Bticino Light tech series
• Install the thermostat 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 instrument 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 instrument and
mount the cover and the white
knob included in the package.
Bticino Living series
Bticino Livinglight series
Bticino Livinglight Air series*
Bticino Matix series
Gewiss Chorus series
Vimar Eikon series
Vimar Eikon Evo series
Vimar Idea series
Vimar Plana series
Vimar Arké series
The choice of the operating logic occurs
via selector switch placed on the front of
the instrument. It’s possible to choose
among 3 modes:
• cooling mode. Place the selector
switch in position if the instrument
is connected to a cooling system.
The output relay is activated when
the environment temperature is
higher than the set one.
• off mode. Place the selector switch in position in case the system should be
turned off for long periods.
Note: In this condition, the thermostat activates the heating system if the
temperature falls below 2 °C (antifreeze temperature).
• heating mode. Place the selector switch in position if the instrument
is connected to a heating system. The output relay is activated when the
environment temperature is lower than the set one.
The instrument has a jumper with whom
to choose the type of regulation, between
on/off or proportional.
To access the jumper you need to remove
the cover after removing power supply
to the instrument. The position of the
jumper determines the type of regulation
as follows:
− jumper in position A: ON/OFF regulation
with fixed differential at 0.3°C
(default setting)
− jumper in position B: proportional regulation with band 0.8 °C
(-0.3 +0.5) and 8 minutes time base
− jumper in position C: proportional regulation with band 1.5 °C
(-0.7 +0.8) and 15 minutes time base
Example of proportional operation with band 0.8°C and 8 minutes base
Tmis = Tset + 0.5 °C = relay OFF
Tmis = Tset + 0.4 °C = 1 minute ON ; 7 minutes OFF
Tmis = Tset + 0.3 °C = 2 minutes ON ; 6 minutes OFF
Tmis = Tset + 0.2 °C = 3 minutes ON ; 5 minutes OFF
Tmis = Tset + 0.1 °C = 4 minutes ON ; 4 minutes OFF
Tmis = Tset
= 5 minutes ON ; 3 minutes OFF
Tmis = Tset - 0.1 °C = 6 minutes ON ; 2 minutes OFF
Tmis = Tset - 0.2 °C = 7 minutes ON ; 1 minute OFF
Tmis = Tset - 0.3 °C = relay ON
Example of proportional operation with band 1.5°C and 15 minutes base
Tmis = Tset + 0.8 °C = relay OFF
Tmis = Tset + 0.7 °C = 1 minute ON ; 14 minutes OFF
Tmis = Tset + 0.6 °C = 2 minutes ON ; 13 minutes OFF
Tmis = Tset + 0.5 °C = 3 minutes ON ; 12 minutes OFF
Tmis = Tset + 0.4 °C = 4 minutes ON ; 11 minutes OFF
Tmis = Tset + 0.3 °C = 5 minutes ON ; 10 minutes OFF
Tmis = Tset + 0.2 °C = 6 minutes ON ; 9 minutes OFF
Tmis = Tset + 0.1 °C = 7 minutes ON ; 8 minutes OFF
Tmis = Tset
= 8 minutes ON ; 7 minutes OFF
Tmis = Tset - 0.1 °C = 9 minutes ON ; 6 minutes OFF
Tmis = Tset - 0.2 °C = 10 minutes ON ; 5 minutes OFF
Tmis = Tset - 0.3 °C = 11 minutes ON ; 4 minutes OFF
Tmis = Tset - 0.4 °C = 12 minutes ON ; 3 minutes OFF
Tmis = Tset - 0.5 °C = 13 minutes ON ; 2 minutes OFF
Tmis = Tset - 0.6 °C = 14 minutes ON ; 1 minute OFF
Tmis = Tset - 0.7 °C = relay ON
Note: The proportional regulation is available only for the heating operation.
Note: The position of the jumper is read only when the instrument is on.
Change the position of the jumper when the instrument is supplied, as well
as expose you to possible shock, so it is useless.
To change the setpoint, turn the knob. The range of settable values is from
5°C to 35°C.
On Keo-A the activation of the relay is signaled by the red LED.
On Keo-B the activation of the relay is not reported to limit battery
consumption.
The instrument has two ring nuts to
limit mechanically the range if the
thermostat 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 (for
example if you want to limit the
range between 15°C and 25°C
turn the knob until the indicator is
in position 20°C).
- 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
desired position (in this case 15 for min and 25 for MAX).
- 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 (in this case
20°C).
To remove the limitation to the setpoint and reset the range 5÷35°C turn the
two ring nuts up to bring the locks of limitation in a position outside the range
5÷35°C.
• Make the connections by respecting the diagrams described in this manual.
• Fix the instrument 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 plates” and they are:
- mount A
- mount B (it could be necessary to remove the side cogs)
- 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.
• When you turn on for the first time the thermostat is performed a cycle of switching
of the relay of OF-ON-OFF type of the total duration of 3 seconds. Once finished the
cycle the thermostat begins with the regulation.
