Daikin EKHBH030BA Manual De Instalación página 31

[6] DT for heat pump domestic water heating mode
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 ( ), heating of the domestic hot water by
T
HP ON
the heat pump will be started. As soon as the domestic hot water
temperature reaches the heat pump OFF temperature (
the user set point temperature (
T
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 = 158°F (70°C)
U
T(°C) T(°F)
[6-01] = 3.6°F (2°C)
[6-00] = 12.6°F (7°C)
70 158 T
U
50 122
T
[6-01]
HP MAX
T
48 118.4
HP OFF
[6-00]
41 105.8 T
HP ON
T < T
U HP MAX
T = 113°F (45°C)
U
T(°C) T(°F)
[6-01] = 3.6°F (2°C)
[6-00] = 12.6°F (7°C)
50 122 T
HP MAX
45 113 T = T
U HP OFF
[6-00]
38 100.4 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 (122°F)(50°C)(depending on T
T Heat pump OFF temperature
HP OFF
T Heat pump ON temperature
HP ON
(a) 113°F (45°C) = T at T >77°F (25°C).
HP MAX A
122°F (50°C) = T at 41°F (5°C)≤T
HP MAX
118.4°F (48°C) = T at T
HP MAX A
The maximum domestic hot water temperature that can be
reached with the heat pump is 122°F (50°C). It is advised
to select T not higher than 118.4°F (48°C) in order
HP OFF
to improve 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
HP ON
EKHBH/X030BA
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
T
HP OFF
), heating of the domestic hot water
U
). See illustration.
T
HP ON
). See illustration.
T
HP OFF
(a)
)
A
≤77°F (25°C).
A
<41°F (5°C).
) is a must.
[7] DT for booster heater and dual set point control
DT for booster heater
Applies only to installations with a domestic hot water tank.
When the domestic hot 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.
) or
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 [7-01] (field setting) below the booster
heater OFF temperature.
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
difference above the domestic hot water set point
temperature before the booster heater is turned off.
T (°F)
DHW
T
163.4
BH OFF
T
159.8
BH ON
T
158
U
140
T
122
HP MAX
T
118.4
HP OFF
T
105.8
HP ON
104
86
68
HP
50
41
T (°C)
DHW
T
73
BH OFF
T
71
BH ON
T
70
U
60
T
50
HP MAX
T
48
HP OFF
T
41
HP ON
40
30
20
HP
10
5
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
hot water step length: temperature
[7-00] [7-01]
[6-01]
[6-00]
T = 158°F
U
[7-00] =
5.4°F
BH HP
[6-01] =
3.6°F
[6-00] = 12.6°F
[7-00] [7-01]
[6-01]
[6-00]
T = 70°C
U
[7-00] = 3°C
BH HP
[6-01] = 2°C
[6-00] = 7°C
+ [7-00])
U
– [7-01])
BH OFF
– [6-01])
HP MAX
– [6-00])
HP OFF
Installation manual
t
t
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