Daikin EKHBH008BB Series Installation Manual page 33

CAUTION
For optional domestic hot water tank EKHTS, the
field setting [4-03] shall be 5.
[4-03]=5, this setting is automatically selected if the
EKHTS tank is connected and SS2-2 is set to ON.
[4-03]=5 activate the applicable logic and field
settings for EKHTS.
INFORMATION
■
Make sure that the domestic hot water set point is
according to your requirements.
Start with a low domestic hot water set point, and only
increase if you feel that the domestic hot water supply
temperature is not sufficient for your requirements
(this depends on your water using pattern).
■
Make sure the domestic water is not heated
unnecessary.
Space heating off temperature
■ [4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off to avoid overheating.
■ [4-06] Backup heater emergency operation: defines whether
backup heater is allowed (1) or not allowed (0) during
emergency operation.
Emergency operation will startup backup heater operation
during certain outdoor malfunctions.
■ [4-07] Backup heater second step: defines whether backup
heater second step is allowed (1) or not allowed (0).
In this way it is possible to limit the backup heater capacity.
INFORMATION
Only for EKHTS: If the storage temperature set point
is higher than 50°C, Daikin advises 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.
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
[5] Equilibrium temperature
(1)
temperature
Equilibrium temperature (only for EKHW*)
The 'equilibrium temperature' field settings apply to operation of the
backup heater.
When the equilibrium temperature function is enabled, operation of
the backup heater is restricted to low outdoor temperatures, i.e. when
the outdoor temperature equals or drops below the specified
equilibrium temperature. When the function is disabled, operation of
the backup heater is possible at all outdoor temperatures. Enabling
this function reduces the working time of the backup heater.
■ [5-00] Equilibrium temperature status: specifies whether the
equilibrium temperature
disabled (0).
■ [5-01] Equilibrium temperature: outdoor temperature below
which operation of the backup heater is allowed.
Space heating priority temperature (only for EKHW*)
Applies only to installations with a domestic hot water tank
'space heating priority temperature' field settings apply to operation
of the 3-way valve and the booster heater in the domestic hot water
tank.
When the space heating priority function is enabled, it is assured that
the full capacity of the heat pump is used for space heating only
when the outdoor temperature equals or drops below the specified
space heating priority temperature, i.e. low outdoor temperature. In
this case the domestic hot water will only be heated by the booster
heater.
■ [5-02] Space heating priority status: specifies whether space
heating priority is enabled (1) or disabled (0).
■ [5-03] Space
heating
temperature below which the domestic hot water will be
heated by the booster heater only, i.e. low outdoor
temperature.
INFORMATION
If the booster heater operation is limited ([4-03]=0)
and the ambient temperature T
setting to which parameter [5-03] is set and [5-02]=1,
then the domestic hot water will not be heated.
■ [5-04] Set point correction for domestic hot water
temperature: set point correction for the desired domestic hot
water temperature, to be applied at low outdoor temperature
when space heating priority is enabled. The corrected
(higher) set point will make sure that the total heat capacity of
the water in the tank remains approximately unchanged, by
compensating for the colder bottom water layer of the tank
(because the heat exchanger coil is not operational) with a
warmer top layer.
T
set
[5-04]
T
U
T Domestic hot water set point temperature
set
T User set point (as set on the user interface)
U
T Ambient (outdoor) temperature
A
Space heating priority
(1) When the unit is configured for restricted power supply condition mode,
see "Appendix" on page 51.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
and space heating
function is enabled
priority temperature:
is lower than the field
A
T
[5-03]
A
Installation manual
priority
(1) or
(2)
. The
outdoor
30