Daikin EKHBHE008BA3V3 Installation Manual page 27

If using a room thermostat, the disinfection function is not
possible as long as the room thermostat demands cooling
or heating. In this case, de-activate the room thermostat
demand by its schedule timer. Refer to the manual of the
room thermostat for a detailed explanation on how to
de-activate space cooling/heating by schedule timer.
[3] Auto restart
When power returns after a power supply failure, the auto restart
function reapplies the user interface settings at the time of the power
supply failure.
NOTE It is therefore recommended to leave the auto restart
function enabled.
Note that with the function disabled the schedule timer will not be
activated when power returns to the unit after a power supply failure.
Press the pr button to enable the schedule timer again.
[3-00] Status: defines whether the auto restart function is
turned ON (0) or OFF (1).
Before changing field settings for domestic water heating,
read attentively the warnings mentioned in the paragraph
"Introduction" on page
[4] Booster heater operation and space heating off temperature
Space heating off temperature
[4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
Booster heater operation
Applies only to installations with a domestic hot water tank.
The operation of the booster heater can be enabled or limited
depending on outdoor temperature (T
temperature (T ) or operation mode of the heat pump.
DHW
[4-03] Booster heater operation: defines whether the optional
booster heater operation is enabled (1) or has certain
limitations (0/2/3).
Explanation of settings of [4-03]
Booster heater will/can only operate if domestic hot water mode
is activated (w).
[4-03]=0, then booster heater operation is only allowed
during "[2] Disinfection function" and "Powerful domestic
water heating" (see operation manual).
This setting is only recommended in case the capacity of the
heat pump can cover the heating requirements of the house
and domestic hot water over the complete heating season.
The result of this setting is that the domestic hot water will
never be heated by the booster heater except for
"[2] Disinfection function" and "Powerful domestic water
heating" (see operation manual).
The field setting [4-03]=2 or 3 is not relevant for this
system.
[4-03]=1, then booster heater heater operation is only
determined by booster heater OFF temperature (T
booster heater ON temperature (T
timer. Refer to setting
page 26.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
1.
), domestic hot water
A
BH OFF
) and/or schedule
BH ON
"[7-00]" on page 26 and "[7-01]" on
[6] DT for heat pump domestic water heating mode
Before changing field settings for domestic water heating,
read attentively the warnings mentioned in the paragraph
"Domestic hot water tank (option)" on page
Applies only to installations with a domestic hot water tank.
The 'DT (temperature difference) for heat pump domestic water
heating mode' field settings determine the temperatures at which
heating of the domestic hot water by the heat pump will be started
(i.e., the heat pump ON temperature) and stopped (i.e., the heat
pump OFF temperature).
When the domestic hot water temperature drops below the heat
pump ON temperature (
the heat pump can be started. As soon as the domestic hot water
temperature reaches the heat pump OFF temperature (
the user set point temperature (
by the heat pump will be stopped (by switching the 3-way valve).
The heat pump OFF temperature, and the heat pump ON
temperature, and its relation with field settings [6-00] and [6-01] are
explained in the illustration below.
[6-00] Start: temperature difference determining the heat
pump ON temperature (
[6-01] Stop: temperature difference determining the heat
pump OFF temperature (
T > T
U HP MAX
T
U
T(°C)
[6-01] =
[6-00] =
70 T
U
50
T
HP MAX
T
48
HP OFF
41 T
HP ON
T User set point temperature (as set on the user interface)
U
T Maximum heat pump temperature at sensor in domestic hot
HP MAX
water tank (50°C)(depending on T
T Heat pump OFF temperature
HP OFF
T Heat pump ON temperature
HP ON
(a) 45°C = T at T
HP MAX
50°C = T at 5°C≤T
HP MAX
48°C = T at T
HP MAX
The maximum domestic hot water temperature that can be
reached with the heat pump is 50°C. It is advised to select
T not higher than 48°C in order to improve
HP OFF
performance of the heat pump during domestic water
heating mode.
When setting [4-03]=0 or 2 special attention to setting
[6-00] is recommended. A good balance between the
required domestic hot water temperature and heat pump
ON temperature (T
),
), heating of the domestic hot water by
T
HP ON
), heating of the domestic hot water
T
U
). See illustration.
T
HP ON
). See illustration.
T
HP OFF
T < T
U HP MAX
= 70°C T
T(°C)
2°C [6-01] =
7°C [6-00] =
50 T
[6-01]
HP MAX
45 T = T
[6-00]
U HP OFF
38 T
HP ON
(a)
)
A
>25°C.
A
≤25°C.
A
<5°C.
A
) is a must.
HP ON
2.
) or
T
HP OFF
= 45°C
U
2°C
7°C
[6-00]
Installation manual
25