8 Configuration
Installer reference guide
50
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
INFORMATION
Only for systems with integrated domestic hot water tank: If
backup heater operation during space heating needs to be
limited but can be allowed for domestic hot water
operation, then put [4‑00] on 1, [5‑00] on 1, and [5‑01] on –
15°C.
INFORMATION
If the storage temperature set point is higher than 55°C,
Daikin recommends NOT to disable the backup heater
second step because it will have a big impact on the
required time for the unit to heat up the domestic hot water
tank.
Auto emergency
When the heat pump fails to operate the backup 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. When a heat pump failure occurs and auto
emergency is set to Manual 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
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 that setting [A.5.1.2] Emergency shall be
set to Automatic.
#
Code
Description
[A.5.1.2]
N/A
Defines whether in an emergency
situation the backup heater is allowed to
automatically take over the entire heat
load or whether manual confirmation is
required.
▪ 0: Manual (default)
▪ 1: Automatic
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.5.1.2] 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 — which heating
source can/will provide the space heating, either the indoor unit or
an auxiliary boiler.
The field setting "bivalent operation" apply only the indoor unit space
heating operation and the permission signal for the auxiliary boiler.
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
CAUTION
Make sure to observe all rules mentioned in application
guideline 5 when bivalent operation function is enabled.
Daikin shall NOT be held liable for any damage resulting
from failure to observe this rule.
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 EKRP1HB (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.
YC Y1 Y2 Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
#
Code
Description
N/A
[C‑03]
ON temperature.
If the outdoor temperature drops below
this temperature, the bivalent heat
source permission signal will be active.
Range: –25°C~25°C (default: 0°C) (step:
1°C)
N/A
[C‑04]
Hysteresis.
Temperature difference between bivalent
heat source ON and OFF to prevent too
much switching.
Range: 2°C~10°C (default: 3°C) (step:
1°C)
8.3.4
System settings
Auto-restart
When power returns after a power supply failure, the auto restart
function reapplies the remote controller settings at the time of the
power failure. Therefore, it is recommended to always enable the
function.
