Daikin EKHBH016AB Operation Manual page 14

[7] Domestic hot water step length
Applies only to installations with a domestic hot water tank.
When the domestic water is heated and the domestic hot water set
point temperature (as set by the user) has been reached, the booster
heater will continue to heat the domestic hot water to a temperature a
few degrees above the set point temperature, i.e. the booster heater
OFF temperature. These extra degrees are specified by the domestic
hot water step length field setting. Correct setting prevents the
booster heater from repeatedly turning on and off (i.e. chattering) to
maintain the domestic hot water set point temperature. Note: the
booster heater will turn back on when the domestic hot water
temperature drops 2°C (fixed value) below the booster heater OFF
temperature.
NOTE If the schedule timer for booster heater (see the
operation manual) is active, the booster heater will only
operate if allowed by this schedule timer.
[7-00] Domestic hot water step length: temperature
difference above the domestic hot water set point
temperature before the booster heater is turned off.
T
DHW
[7-00]
T
73
BH OFF
T
71
BH ON
T
70
U
60
T
55
HP MAX
[6-01]
T
48
HP OFF
[6-00]
T
41
HP ON
40
30
20
HP
10
0
BH Booster heater
HP Heat pump. If heating up time by the heat pump takes too
long, auxiliary heating by the booster heater can take place
T Booster heater OFF temperature (T
BH OFF
T Booster heater ON temperature (T
BH ON
T Maximum heat pump temperature at sensor in domestic hot
HP MAX
water tank
T Heat pump OFF temperature (T
HP OFF
T Heat pump ON temperature (T
HP ON
T Domestic hot water temperature
DHW
T User set point temperature (as set on the user interface)
U
t Time
Operation manual
13
T = 70°C
U
[7-00] = 3°C
HP
BH
[6-01] = 7°C
[6-00] = 7°C
+ [7-00])
U
– 2°C)
BH OFF
– [6-01])
HP MAX
– [6-00])
HP OFF
[8] Domestic water heating mode timer
Applies only to installations with a domestic hot water tank.
The 'domestic water heating mode timer' field settings defines the
minimum and maximum domestic water heating times, and minimum
time between two domestic water heating cycli.
[8-00] Minimum running time: specifies the minimum time
period during which domestic water heating should be
activated, even when the target domestic hot water
temperature has already been reached.
[8-01] Maximum running time: specifies the maximum time
period during which domestic water heating can be activated,
even when the target domestic hot water temperature has
not yet been reached.
Note that when the unit is configured to work with a room
thermostat (refer to the installation manual), the maximum
running timer will only be taken into account when there is a
request for space cooling or space heating. When there is no
request for room cooling or room heating, domestic water
heating by the heat pump will continue until the "heat pump
OFF temperature" (see field settings [5]) is reached. When
no room thermostat is installed, the timer is always taken into
account.
[8-02] Anti-recycling time: specifies the minimum required
interval between two domestic water heating cycli.
1
0
1
0
1 Domestic water heating (1 = active, 0 = not active)
t
2 Hot water request (1 = request, 0 = no request)
t Time
[8-03] Booster heater delay time: specifies the start-up time
delay of the booster heater operation after start of the heat
pump domestic water heating operation.
1
3
0
1
0
1
0
1 Booster heater operation (1 = active, 0 = not active)
2 Heat pump domestic water heating operation (1 = request, 0 =
no request)
3 Hot water request (1 = request, 0 = no request)
t Time
Indoor unit for hot water heat pump system and options
[8-00]
[8-01] [8-02]
[8-03]
t
t
EKHBH/X016AB