![background image](http://html.mh-extra.com/html/daikin/altherma-erhq011-014-016ba/altherma-erhq011-014-016ba_installers-reference-manual_501283066.webp)
8 Configuration
Installer reference guide
66
ERHQ+ERLQ011~016 + 16CBV
Daikin Altherma – Low temperature split
4P449970-1 – 2016.06
INFORMATION
Disinfection function is restarted in case the domestic hot
water temperature drops 5°C below the disinfection target
temperature within the duration time.
INFORMATION
An AH error occurs if you do the following during
disinfection:
▪ Set the user permission level to Installer.
▪ Go to the DHW tank temperature home page (Tank).
▪ Press to interrupt the disinfection.
8.3.3
Heat source settings
Backup heater
Backup heater operation mode: defines when backup heater
operation is enabled or disabled. This setting is only overruled when
backup heating is required during defrost operation or malfunctioning
of the outdoor unit (when [A.6.C] is enabled).
#
Code
Description
[A.5.1.1]
[4‑00]
Backup heater operation:
▪ 0: Disabled
▪ 1 (default): Enabled
[A.5.1.3]
[4‑07]
Defines whether backup heater second
step is:
▪ 1: Allowed
▪ 0: NOT allowed
In this way it is possible to limit the
backup heater capacity.
N/A
[5-00]
Is backup heater operation allowed
above equilibrium temperature during
space heating operation?
▪ 1: NOT allowed
▪ 0: Allowed
[A.5.1.4]
[5‑01]
Equilibrium temperature.
Outdoor temperature below which
operation of the backup heater is
allowed.
Range: –15°C~35°C (default: 0°C) (step:
1°C)
Auto emergency
When the heat pump fails to operate, the backup heater and anti-
legionella heater can serve as an emergency heater and either
automatically or non-automatically take over the heat load.
▪ When auto emergency is set to Automatic and a heat pump failure
occurs:
▪ The backup heater will automatically take over the heat load.
▪ The anti-legionella heater will automatically take over the
domestic hot water production.
▪ 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 you to confirm whether the backup heater or anti-
legionella heater can take over the heat load or not.
When the heat pump fails, will appear on the user interface. If the
house is unattended for longer periods, we recommend to set
[A.6.C] Emergency to Automatic.
#
Code
Description
[A.6.C]
N/A
Emergency:
▪ 0: Manual (default)
▪ 1: Automatic
INFORMATION
If [4‑03]=1 or 3, then Emergency=Manual is not applicable
for the anti-legionella heater.
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
Applies only to installations with an auxiliary boiler (alternating
operation, parallel connected). The purpose of this function is to
determine — based on the outdoor temperature (possibility 1) or on
energy prices (possibility 2) — which heating source can/will provide
the space heating, either the indoor unit or an auxiliary boiler.
The field setting "bivalent operation" applies only the indoor unit
space heating operation and the permission signal for the auxiliary
boiler.
Possibility 1
The installer can set a temperature below which the boiler will
always operate when electric prices (High, Medium, Low) are "0" in
the menu structure.
NOTICE
Do NOT use overview settings!
When the "bivalent operation" function is enabled, the indoor unit will
stop automatically in space heating operation when the outdoor
temperature drops below "bivalent ON temperature" and the
permission signal for the auxiliary boiler becomes active.
When the bivalent operation function is disabled, the space heating
by indoor unit is possible at all outdoor temperatures (see operation
ranges) and permission signal for auxiliary boiler is ALWAYS
deactivated.
▪ [C‑03] Bivalent ON temperature: defines the outdoor temperature
below which the permission signal for the auxiliary boiler will be
active (closed, KCR on EKRP1HB) and space heating by indoor
unit will be stopped.
▪ [C‑04] Bivalent hysteresis: defines the temperature difference
between bivalent ON temperature and bivalent OFF temperature.
Permission signal X1–X2 (
EKRP1HB
)
T
A
[C-03]
[C-04]
a
b
T
A
Outdoor temperature
a
Closed
b
Open
#
Code
Description
N/A
[C-03]
Range: –25°C~25°C (default: 0°C) (step:
1°C)
N/A
[C-04]
Range: 2°C~10°C (default: 3°C) (step:
1°C)