OJ Electronics ETN4-1999 Manual - page 2
2
© 2016 OJ Electronics A/S
ETN4-1999
English
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.
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. The
following
alternatives exist:
Floor (F):
The thermostat controls floor temperature
alone.
A floor sensor must be fitted.
Room (A):
The thermostat controls room temperature
alone.
Limit (Li):
Limit is an on/off function in which the
required limit is set in Limit low (”Li”
”Lo”)
after selecting the Li option under APp. When
the recorded temperature is above the tem-
perature specified in ”Li”
”Lo”, temperature
is controlled in the usual way towards the
user-specified setpoint. If, on the other hand,
the temperature drops below that specified
in ”Li”
”Lo”, the relay cuts out and ”Lo” ap-
pears on the display.
Limit function (APp
Li) should be selected if
a limit is required for when heating is permit-
ted to be activated. Only one sensor is used
for the limit function, and this sensor must
be connected to the floor sensor input of the
thermostat.
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.
”Regulator” mode in combination with
”Night setback”
If both Regulator mode (APp
C) and ”Night
setback” are selected, night setback is set in
relative values while frost protection is set in
absolute values in per cent.
The setpoint specifies (in per cent) the time
the unit is to remain active in a PWM cycle,
which is usually 20 min, while setback degree
is specified as a percentage of the setpoint.
The setpoint multiplied by the setback degree
gives the activation degree.
Example: If the setpoint is set to 60 % and
night setback is set to 25 %, the activation
degree will be (0.60 x 0.25 = 0.15) = 15 %.
Graphic
example:
Parameter
Shown on display
Factory settings
Max. temperature
SCA
Hi
40
40 °C
(0,0/+70
°C)
Min. temperature
SCA
Lo
0
0 °C
(-19
,5/+60 °C)
Max. limit tempera-
ture FLOOR
*1
Li
Hi
28
28 °C
(-19.5/+70 °C + OFF)
Min. limit tempera-
ture FLOOR
*1
Li
Lo
15
15 °C
(-19.5/+70 °C + OFF)
Min. limit tempera-
ture Limit function
*2
Li
Lo
-19,5
-19,5 °C
(-19.5/+70 °C + OFF)
Frost protection
dEF
8.0
8 °C
(0/+10 °C)
Night setback
*3
nSb
-5.0
-5 °C
(-19.5/+30 °C)
Measured floor
temperature
FLo
24.5 (example)
*4
Measured room
temperature
ro
21.5 (example)
*4
Application
APp
F (Floor sensor)
A (Room sensor)
Li (Limit function)
AF (Room sensor
with floor tempe-
rature limits)
C : Regulator
F : Floor
Scale
LCd
C
C = Celsius
(nU = numerical 0-100 %)
Temperature reading
in start display
dF
SP
SP = Setpoint
(tP = actual temp.)
Adjust o
ffset
Adj
24.5 (example)
Actual temperature
(+/- 10 °C)
Control method
PWM
On
On
(OFF)
PWM cycle time
*5
cyc
20
20 minutes
(10-60 min)
Differential tempe-
rature
*6
dIF
0.3
0.3 °C
(0.3/10 °C)
Relay function
rEL
no
no = normally open
(nc = normally closed)
EN50559
PLi
0
0 min (0-20 min.)
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
: Only available with external timer.
*4
: With no or disconnected sensor, - - is shown on the display.
*5
: Only available if PWM is ON under Control Method.
*6
: 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
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).
Limit function
If application (APp) is set to limit (Li), the lowest temperature at
which heating is to be provided can be set.