Daikin Altherma EKRTCTRL2 - Air Temperature Probe Assembly; EKRTCTRL2 Connections

15
S
I
U
B
C
D
A
A
INN-FR-B20
H4
COMM
Y2Y1
H2
DISPLAY INN-DU4
H2
NEV1 NEV2
ASCII
GRID
S1
D
AIR
RTU
M1
AIR
B
C
ZOT
MOTOR
6V DC
230V AC
HRS
RS
L N
NL
EKRTCTRL2
5.3
5.4
EN
To position the temperature probe (ref. A):
- pass the probe through the hole on the shoulder (ref. B)
- insert the probe into the lower hole (ref. C)
- fix the probe on the relevant hook (ref. D)
Air temperature probe assembly
EKRTCTRL2 Connections
H2* water temperature probe (10 kΩ)
AIR air temperature probe (10 kΩ)
M1 DC inverter fan motor
S1 grill safety micro-switch
Y1
water solenoid valve (230V/ 50Hz 1A output
voltage)
Y2
Mobile flap connection.
230V/ 50Hz 1A output voltage.
L-N 230V/50Hz electrical power supply
* If after switching the power on the board
detects the H2 probe, start-up occurs in normal
conditions with the minimum water temperature
when heating (30°C) and maximum when
cooling (20°C).
The board also has a function when there is no
probe, in such cases the fan stop minimum and
maximum thresholds are ignored.