3
Keypad lock
Thedefault status of ‘KeypadLock’ is all keys
availableand it canbe changed in ISUmode.
Keypad lock has the following settings:
All keys areavailable (Default)
Systembutton is lockedout
FanandSystembuttonare lockedout
All buttons are locked
Operatingmodes
The followingoperatingmodes areavailable:
Comfortmode
In comfortmode, the setpoint canbe changedby
pressingupor downbutton. Different applications
include cool only, heat only andmanual heat/cool
changeover.
Energysavingmode
Apotential-freedry contact (suchas hotel key card)
or buttonpress (pressingmodebutton for 3 seconds)
canactivate theenergy savingmodewith
icon
appearingon screen. Thedry contact canbe
selectedas normal openor normal close type in ISU.
If activatedby dry contact, all buttonswill be locked
except themulti-key for ISU. If energy saving is
activatedby buttonpress, pressingany buttonwill
stopenergy savingmode.
For heatingmode, if theenergy saving function is
enabled, the setpoint will change to remote setback
heating setpoint. The rangeof remote setback
heating setpoint is from10
℃
to21
℃
anddefault
value is 18
℃
. The valuemay change in ISUwith step
of 0.5
℃
.
For coolingmode, if theenergy saving function is
enabled, the setpoint will change to remote setback
cooling setpoint. The rangeof remote setback
cooling setpoint is from22
℃
to32
℃
anddefault
value is 26
℃
. The valuemay change in ISUwith step
of 0.5
℃
.
Freezingprotectionmode
Freezingprotection canbedisabled (default) or
enabled. If freezingprotection is enabled (It is not
available in cool only application) and thermostat is in
OFFmodewhile the room temperature is below6
℃
,
the thermostat will openheatingdevicebefore the
temperature rises to8
℃
.
On/offmode
Pressingpower button can turnon/ turnoff the
thermostat.
Technical specification
Electrical:
Power supply
24 (+/-10%) VAC
Frequency
50Hz
Modulatingoutput
DC0……10V, Support
VC7900 series actuators
Fan load rating
230(+/-10%)VAC, 4(2)A
Relay life
100,000 times
Wiring
Max 16AWG
TemperatureControl:
Sensingelement
10K (@25
℃
) NTC
Control algorithm
PI,Modulatingoutput
Accuracy
+/-1
℃
at 21
℃
Setpoint range
10
～
32
℃
Display range
0
～
37
℃
Environmental:
ProtectionClass IP20
Operation temperature -18
～
49
℃
Shipping temperature -35
～
65
℃
Relativehumidity
5
～
90%
Installation:
Installedon86×86mmbox or 3×3inchbox
