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EBLA09~16D + EDLA09~16D
Daikin Altherma 3 M
4P620241-1B – 2022.05
▪
An expansion vessel is already pre-mounted in the outdoor unit. But for bivalent
operation, also make sure that there is an expansion vessel in the auxiliary boiler
loop. Otherwise when bivalent operation is running and if the Aquastat valve
would close, there would be no expansion vessel in the water circuit anymore.
▪
Install the digital I/O PCB (option EKRP1HBAA).
▪
Connect X1 and X2 (changeover to external heat source) on the digital I/O PCB to
the auxiliary boiler. See
4
source" [
115].
▪
To setup the heat emitters, see
4
system" [
32].
Configuration
Via the user interface (configuration wizard):
▪
Set the use of a bivalent system as external heat source.
▪
Set the bivalent temperature and hysteresis.
▪
Set the operation mode to space heating only (no tank operation).
NOTICE
▪
Make sure the bivalent hysteresis has enough differential to prevent frequent
changeover between outdoor unit and auxiliary boiler.
▪
Because the outdoor temperature is measured by the outdoor unit air
thermistor, install the outdoor unit in the shadow so that it is NOT influenced or
turned ON/OFF by direct sunlight.
▪
Frequent changeover may cause corrosion of the auxiliary boiler. Contact the
manufacturer of the auxiliary boiler for more information.
Changeover to external heat source decided by an auxiliary contact
▪
Only possible in external room thermostat control AND one leaving water
temperature zone (see
▪
The auxiliary contact can be:
-
An outdoor temperature thermostat
-
An electricity tariff contact
-
A manually operated contact
-
...
▪
Setup: Connect the following field wiring:
L
Outdoor/Auto/Boiler
K1A
N
B
Boiler thermostat input
TI
A Auxiliary contact (normally closed)
H Heating demand room thermostat (optional)
K1A Auxiliary relay for activation of outdoor unit (field supply)
K2A Auxiliary relay for activation of boiler (field supply)
Outdoor Outdoor unit
Auto Automatic
Boiler Boiler
"9.2.11 To connect the changeover to external heat
"6.2 Setting up the space heating/cooling
"6.2 Setting up the space heating/cooling
H
Com
Outdoor
X2M
35 30
A
K1A
K2A
6
Application guidelines
|
system" [
B TI
X Y
K2A
Installer reference guide
4
32]).
47
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