Daikin EKHBX030BA Installation Manual page 32

WARNING
Be aware that the domestic hot water temperature will be
automatically increased (always) with the value selected in
field setting [7-00] compare to the user set point for
domestic hot water (T
U
the operation manual to select preferable set point.
If this high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to local laws and regulations.
If the booster heater operation is limited ([4-03]=0), then
set point of field setting parameter [7-00] has only meaning
for powerful domestic water heating.
[7-01] Hysteresis value
difference determining the booster heater ON temperature
(T ). T = T
BH ON BH ON BH OFF
The minimum
temperature (T
BH ON
pump OFF temperature (T
Dual set point control
Applies only to installations with different heat emitter which require
different set points.
Dual set point control makes it possible to generate 2 different set
points.
NOTE There is no indication available which set point is
active!
[7-02] Dual set point control status: defines whether the dual
set point control is enabled (1) or disabled (0).
[7-03] Second set point heating: specifies the second set
point temperature in heating operation.
[7-04] Second set point cooling: specifies the second set
point temperature in cooling operation.
Installation manual
30
). Refer to field setting [7-00] and
booster heater: temperature
– [7-01]
value for booster heater
) is 3.6°F (2°C) (fixed) below heat
).
HP OFF
NOTE The first set point heating/cooling is the set point
selected on the user interface.
-
-
The second set point heating [7-03] should be
linked to the heat emitters which requires the
highest set point in heating mode. Example: fan
coil unit.
The second set point cooling [7-04] should be
linked to the heat emitters which requires the
lowest set point in cooling mode. Example: fan
coil unit.
The actual second set point heating value
depends on the selected value of setting [7-03].
-
-
ON
The selection of second set point or first set point
is determined by the terminals (X2M: 1, 2, 4).
The second set point has always priority on the
first set point.
SP2
When dual set point control is enabled, heating/cooling
selection always has to be done on the user interface.
NOTE It is the responsibility of the installer to make sure no
unwanted situations can occur.
It is very important that the water temperature to the
floor heating loops never becomes too high in heating
mode or never too cold in cooling mode. Failure to
observe this rule can result in construction damage or
discomfort. For example in cooling mode condensation
on the floor can occur when water towards the floor
heating loops is too cold (dew point).
In heating mode the first set point can be a
fixed value or weather dependent.
In cooling mode the first set point is always a
fixed value.
In case [7-03]=1.8~43.2°F (1~24°C), the
actual second set point will be first set point
heating increased with [7-03] (the maximum is
131°F (55°C)).
In this way the second set point heating is
linked to the first set point heating.
In case [7-03]=77~131°F (25~55°C), the
actual second set point heating is equal to
[7-03].
SP1 First set point contact
X2M
SP2 Second set point
1 2 3 4
contact
SP1
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
EKHBH/X030BA