2© 2012 OJ Electronics A/S
ETN4-1999 English
Frost protection = 8 °C means temp. setting = 8 °C.
Night setback / energy-saving function
The number of degrees the temperature setting is to be reduced.
The night setback setting must be preceded by a minus sign (-). Is
controlled via an external signal (fig. 3 in instructions).
Example: The setpoint is 25 °C.
Energy-saving function = -5 °C means temp. setting = 20 °C.
Energy-saving function = +3 °C means temp. setting = 28 °C.
Measured floor temperature
Displays actual floor temperature (if a floor sensor is fitted).
Measured room temperature
Displays actual room temperature.
Application
Sets thermostat function. Select the required control type. Four
alternatives exist:
Floor (F): The thermostat controls floor temperature
alone.
A floor sensor must be fitted.
Room (A): The thermostat controls room temperature
alone.
Room/limit (AF): The thermostat controls room temperature
while respecting min. and max. limits for floor
temperature. A floor sensor must be fitted.
Regulator (C): The thermostat functions as a simple regulator
and no sensors are used. The setting is in per
cent.
Limit function (Li): Controls only on floor sensor temperature with
min. and max. limits. (Li Lo = -19,5/0 °C)
Scale
Choose between degrees Celsius and a numerical scale. If the
numerical scale is selected, temperature is set on a scale from
0.0 to 10.0 where 0.0 corresponds to min. temperature (SCA Lo)
and 10.0 corresponds to max. temperature (SCA Hi).
Temperature reading
Defines which temperature is to be shown on the start display: the
setpoint (SP) or the actual, measured temperature.
Offset
If the actual temperature (measured using a thermometer) diers
from that displayed by the thermostat, the thermostat can be
adjusted to oset the dierence.
Control method
PWM or ON/OFF control can be selected. PWM is an advanced
control method which calculates the most eective and economi-
cal way to heat homes and other buildings. ON/OFF control is
traditional dierential control (e.g. 0.3 °C) for other tasks.
PWM cycle time
Allows cycle time to be set when using PWM control. At least 20
min is recommended.
Differential temperature
Allows temperature dierential to be set when using ON/OFF con-
trol. The higher the dierential temperature, the lower the number
of relay operations.
Relay function
When used for heating purposes, the relay should be in normally
open position (NO). If the thermostat is used for cooling purposes,
the relay should be turned to normally closed (NC).
Parameter Shown on display Factory settings
Max. temperature SCA Hi 40 40 °C
(-19.5/+70 °C)
Min. temperature SCA Lo 0 0 °C
(-19.5/+70 °C)
Max. limit temperature
FLOOR *1 Li Hi 28 28 °C
(-19.5/+70 °C + OFF)
Min. limit temperature
FLOOR *1 Li Lo 15 15 °C
(-19.5/+70 °C + OFF)
Min. limit temperature
Limit function *2 Li Lo -19,5 -19,5 °C
(-19.5/0 °C + OFF)
Frost protection dEF 8.0 8 °C
(0/+10 °C)
Night setback nSb -5.0 -5 °C
(-19.5/+30 °C)
Measured floor tem-
perature FLo 24.5 (example) *3
Measured room
temperature ro 21.5 (example) *3
Application APp F (Floor sensor)
A (Room sensor)
AF (Room sensor with
floor temperature
limits)
C : Regulator
F : Floor
Scale LCd C C = Celsius
(nU = numerical)
Temperature reading in
start display dF SP SP = Setpoint
(tP = actual temp.)
Oset OFF 0 0
(+/- 10 °C)
Control method PWM On On
(OFF)
PWM cycle time *4 cyc 20 20 minutes
(10-60 min)
Dierential tempera-
ture *5 dIF 0.3 0.3 °C
(0.3/10 °C)
Relay function rEL no
no = normally open
(nc = normally
closed)
Software version SU 1.0
*1 : Only available if APp AF is selected under Application.
*2 : Only available if APp Li is selected under Application.
*3 : With no or disconnected sensor, - - is shown on the display
*4 : Only available if PWM is ON under Control Method.
*5 : Only available if PWM is OFF under Control Method.
If Regulator (C) is selected under Application, the floor and room sensors are discon-
nected and heating is controlled on a scale of 0-10, corresponding to 0-100% of full
power.
Max. temperature
The highest temperature to which the thermostat can be set.
Min. temperature
The lowest temperature to which the thermostat can be set.
Max. limit temperature
Allows the highest permissible floor temperature to be set for
wooden and other floor types when control type has been set to
room sensor with floor limit (AF).
Min. limit temperature - Floor
Allows the lowest permissible floor temperature to be set for tiled
and other floor types when control type has been set to room sen-
sor with floor limit (AF).
Min. limit temperature - Limit function
Allows the lowest permissible temperature to be set in Limit func-
tion.
Frost protection
The lowest temperature for frost protection when the function is
activated via an external signal (fig. 4 in instructions).
Example: The setpoint is 25 °C.
