Daikin EKHBH016AA, Operation Manual

Page: 14 / 20

Operation manual
13
EKHBH/X016AA
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36977-1B
[7] Sanitary water step length
Applies only to installations with a sanitary water tank.
When the sanitary water is heated and the sanitary water set point
temperate (as set by the user) has been reached, the booster heater
will continue to heat the sanitary 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 sanitary water
step length field setting. Correct setting prevents the booster heater
from repeatedly turning on and off (i.e. chattering) to maintain the
sanitary water set point temperature. Note: the booster heater will
turn back on when the sanitary water temperature drops 2°C (fixed
value) below the booster heater OFF temperature.
■
[7-00] Sanitary water step length: temperature difference
above the sanitary water set point temperature before the
booster heater is turned off.
[8] Sanitary water heating mode timer
Applies only to installations with a sanitary water tank.
The 'sanitary water heating mode timer' field settings defines the
minimum and maximum sanitary water heating times, and minimum
time between two sanitary water heating cycli.
■
[8-00] Minimum running time: specifies the minimum time
period during which sanitary water heating should be
activated, even when the target sanitary water temperature
has already been reached.
■
[8-01] Maximum running time: specifies the maximum time
period during which sanitary water heating can be activated,
even when the target sanitary 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, sanitary 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 sanitary water heating cycli.
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.
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
BH OFF
Booster heater OFF temperature (T
U
+ [7-00])
T
BH ON
Booster heater ON temperature (T
BH OFF
– 2°C)
T
HP MAX
Maximum heat pump temperature at sensor in sanitary
water tank
T
HP OFF
Heat pump OFF temperature (T
HP MAX
– [6-01])
T
HP ON
Heat pump ON temperature (T
HP OFF
– [6-00])
T
SWW
Sanitary water temperature
T
U
User set point temperature (as set on the user interface)
t Time
t
T
BH ON
T
SWW
T
HP ON
T
HP OFF
T
HP MAX
T
U
T
BH OFF
[6-01]
[6-00]
[7-00]
T
U
= 70
°
C
[7-00] = 3
°
C
[6-01] = 2
°
C
[6-00] = 7
°
C
HP BH HP
0
10
20
30
40
41
48
50
60
71
70
73
1 Sanitary water heating (1 = active, 0 = not active)
2 Hot water request (1 = request, 0 = no request)
t Time
t
1
0
1
0
[8-01] [8-02]
[8-00]