Daikin Altherma 3 R F Installer's Reference Manual page 142

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Configuration
Installer reference guide
142
When auto emergency is set to Manual and a heat pump failure occurs, the
domestic hot water and space heating operations will stop and need to be
recovered manually. The user interface will then ask the user to confirm whether
the boiler can take over the entire heat load or not.
When the heat pump fails,
unattended for longer periods, we recommend to set [A.6.C] Emergency to
Automatic.
#
Code
[A.6.C]
N/A
INFORMATION
The auto emergency setting can be set in the menu structure of the user interface
only.
INFORMATION
If a heat pump failure occurs and [A.6.C] is set to Manual, the room frost protection
function, the underfloor heating screed dryout function, and the water pipe
antifreeze function will remain active even if the user does NOT confirm emergency
operation.
Bivalent
Only applies to indoor unit installations with an auxiliary boiler (alternating
operation, connected in parallel). The purpose of bivalent operation is to
determine which heating source can/will provide the space heating, either the
indoor unit or an auxiliary boiler.
#
Code
N/A
[C-02]
If bivalent is enabled: When the outdoor temperature drops below the bivalent
ON, the space heating by the indoor unit stops automatically and the permission
signal for the auxiliary boiler is active.
If bivalent is disabled: Space heating is only done by the indoor unit within the
operation range. The permission signal for the auxiliary boiler is always inactive.
INFORMATION
The bivalent operation function has no impact on the domestic water heating
mode. The domestic hot water is still and only heated by the indoor unit.
The permission signal for the auxiliary boiler is located on the EKRP1HBAA (digital
I/O PCB). When it is activated, the contact X1, X2 is closed and open when it is
deactivated. See illustration below for the schematic location of this contact.
will appear on the user interface. If the house is
Description
Emergency:
0: Manual
1: Automatic
Description
Indicates if the space heating is also performed
by means of another heat source than the
system.
0 No
1 Bivalent : Installed. The auxiliary boiler (gas
boiler, oil burner) will operate when the
outdoor ambient temperature is low. During
bivalent operation, the heat pump is turned off.
Set this value in case an auxiliary boiler is used.
ERLA03DAV3 + EHFH03S18DJ3V
Daikin Altherma 3 R F
4P596806-1 – 2019.10
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