Vemer KEO-A LCD - Page 2

OPERATION
During the standard operation the thermostat displays the detected temperature value and the relay status is identified by the symbol (heating mode)
or the symbol
(cooling mode).
Switch off
Note: in heating mode (winter), the device if off, it regulates according to the
antifreeze temperature Toff in order to prevent freezing of the system.
Toff can have values from 1°C to 50°C or be excluded; in this case any
minimum temperature is guaranteed.
3 sec.
3 sec.
Error messages
Occurs in case of probe failure.
In this case the regulation is inhibited and
the relay contacts remain in position 2-3.
Occurs for the following values of measured temperature:
t < 0 °C
t >50 °C (t > 60 °C with external probe)
10
• Keo-B LCD
The keo-B LCD has a backlighting of blue colour that is normally off and turns
on when a key is pressed.
• Keo-A LCD
The Keo-A-LCD has a backlighting of blue colour which is on during normal
operation.
If the installation makes it necessary (for example bedrooms) you can turn off
the backlighting. In this condition the thermostat continues to operate normally
and the backlighting turns on when you enter setpoint modification menus,
advanced programming, pin enter.
3 sec.
3 sec.
Backlighting management
9
ADAPTABILITY FRAMES
FRAMES SERIES
A
ABB: Mylos
AVE: S44
BTICINO: Living, Light, Light Tech, Livinglight, Axolute
VIMAR: Eikon, Eikon Evo, Plana
B
ABB: Chiara
BTICINO: Matix *
GEWISS: Chorus *
VIMAR: Arkè, Idea
AIR BTICINO: Livinglight AIR
AXO AIR BTICINO: Axolute Air **
BLN BTICINO: Living NOW ***
** AXO AIR frame not included in the package.
Available to purchase separately (code VE767500).
*** BLN frame not included in the package.
Kit that can be purchased separately consisting of frame and
front panels in various colors (code VE792600-white, VE792700-black,
VE792800-sand, VE786400-3 colours).
Note:
* remove the teeth from the frame
for proper compatibility
(see figure to the side).
PLASTIC ELEMENTS
BM
VI
• For correct compatibility with the BTicino Matix series,
use the BM plastic elements in combination with
the frame B.
• For correct compatibility with the Vimar Idea series,
use the VI plastic elements in combination with frame B
8a
KEO-B LCD BATTERY MOUNTING
Note:
1. For installation with the BTicino Livinglight AIR series if the box extension is not present (adapter which increases the depth of the recessed box)
we recommend using the Livinglight AIR installation frame.
2. Choose the adaptability frame based on the compatibility table (see BOX 9) for the domestic range.
3. Insert, if necessary, plastic elements (see BOX 9)
1
2
3
8b
KEO-A LCD MOUNTING
Note:
1. For installation with the BTicino Livinglight AIR series if the box extension is not present (adapter which increases the depth of the recessed box)
we recommend using the Livinglight AIR installation frame.
2. Choose the adaptability frame based on the compatibility table (see BOX 9) for the domestic range.
3. Insert, if necessary, plastic elements (see BOX 9)
1
2
3
Setpoint modification Night reduction
The “night reduction” function reduces the setpoint
of 3 °C. Press the key
for 3 seconds to activate
(or deactivate, if already active) the night reduction.
When the reduction night is
active, a display lights up
the symbol
.
Normal operation
Modification of the desired temperature (setpoint),
to increase to decrease
Normal operation
heating on (
)
or
19.8
19.9
...
3 sec.
(only for Keo-B LCD)
Minimum settable setpoint - L0
It’s the minimum value settable as setpoint.
Settable values: 2 ÷ 50 °C
Maximum settable setpoint - KI
It’s the maximum value settable as setpoint.
Settable values: L0 ÷ 50 °C
Operating mode - E-I
if connected to the boiler (heating)
if connected to a cooling system
Antifreeze temperature - Toff - (only in heating)
Minimum temperature maintained with device off
(see box «Switch off»).
Settable values: 1 ÷ 50 °C or --- (excluded function)
To enter menu Advanced programming keep simultaneously
pressed for 3 seconds the keys
and until PR will appear.
The items of the menu are displayed in succession. For each
item is displayed an identification abbreviation and its relative
blinking value. Use the keys
and to modify the value.
The passage to the next parameter occurs after 3 seconds
without pressing any key. Once all parameters are set the writing
END is displayed and the thermostat returns to normal operation
saving the effected modifications.
3 sec.
Advanced programming
Regulation type - REG - (only in heating)
0 = on/off with settable differential
P8 = proportional with band 0.8°C and period 8 minutes
P15 = proportional with band 1.5°C and period 15 minutes
Differential - d0.3 - (only for on/off regulation)
Differential (or hysteresis) for temperature regulation.
Settable values: 0,1 ÷ 1 °C
Input configuration - Est - (only for Keo-B LCD)
- ^_ [ for the connection of a temperature probe
- DIG for the connection of an external contact to reduce the
setpoint. With the external contact closed, the setpoint is reduced
by 3 °C with respect to the value set and the symbol
appears
on the display.
Lock password - PAS (001-999)
ALL to prevent any changes (keypad lock)
PAR to prevent access to advanced programming
Set “---” to disable the lock.
If the password is requested and it is entered correctly,
the instrument is unlocked for the following 30 seconds.