Heat Source Settings - Daikin EWAQ004BAVP Installer's Reference Manual

8 Configuration
# Code
[A.3.3.1] [4-02] Space heating OFF temp. If the outdoor
temperature rises above this value, the
operation mode will change to cooling:
Range: 14°C~35°C (default: 25°C)
[A.3.3.2] [F-01] Space cooling On temp. If the outdoor
temperature drops below this value, the
operation mode will change to heating:
Range: 10°C~35°C (default: 20°C)
Changeover settings related to the indoor temperature. ONLY
applicable when Automatic is selected and the system is configured
in room thermostat control, and there are quick heat emitters.
N/A [4-0B] Hysteresis: Ensures that changeover is
ONLY done when necessary. Example:
The space operation mode ONLY
changes from cooling to heating when
the room temperature drops below the
desired heating temperature subtracted
by the hysteresis.
Range: 1°C~10°C, step: 0.5°C (default:
1°C)
N/A [4-0D] Offset: Ensures that the active desired
room temperature can be reached.
Example: if heating to cooling
changeover would occur below the
desired room temperature in heating, this
desired room temperature could never
be reached.
Range: 1°C~10°C, step: 0.5°C (default:
3°C)
8.3.2

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
[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: –4°C)
(step: 1°C)
Installer reference guide
58
Description
Description
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 auto emergency is set to Manual and a heat pump failure
occurs, space heating operation will stop and needs 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 to set
[A.6.C] Emergency to Automatic.
# Code
[A.6.C] N/A Emergency:
▪ 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.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 outdoor unit or an auxiliary boiler.
The field setting "bivalent operation" applies only to the space
heating operation of the outdoor unit and the permission signal for
the auxiliary boiler.
Possibility 1
The installer can set a temperature below which the boiler will
always operate when the electricity prices (High, Medium, Low) are
"0" in the menu structure.
NOTICE
Do NOT use overview settings!
When "bivalent operation" function is enabled, the outdoor unit will
stop automatically with space heating operation when the outdoor
temperature drops below the "bivalent ON temperature", and the
permission signal for the auxiliary boiler becomes active.
When the bivalent operation function is disabled, space heating
operation by the outdoor unit is possible at all outdoor temperatures
(see operation ranges), and the permission signal for the 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, X8M/3+4 on option box EK2CB07CAV3) and
space heating by the outdoor unit will be stopped.
▪ [C‑04] Bivalent hysteresis: defines the temperature difference
between bivalent ON temperature and bivalent OFF temperature.
Permission signal X8M/3+4 (on option box EK2CB07CAV3)
Packaged air-cooled water chillers and packaged air to water heat
Description
EWAQ+EWYQ004+005BAVP
pumps
4P492900-1 – 2017.06