EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
32
Scheduled reheat domestic water heating
(1)(2)
:
■
[6-05]
Reheat: defines whether the scheduled domestic
water reheat during daytime is enabled (1) or continuous
reheat is enabled (2) or reheat is disabled (0)
■
[6-06] Scheduled reheat start time: time of the day at which
the domestic water should be heated.
■
[6-07] Domestic hot water reheat set point
■
[6-08] Domestic hot water reheat set point hysteresis
Example 1
: Scheduled storage [6-03]=1, scheduled reheat [6-05]=1,
disinfection function [2-01]=1 activated.
A Scheduled storage operation:
activated at [6-04], heat
up domestic hot water untill domestic hot water user
interface set point T
DHW
(e.g 55°C) is reached.
B Scheduled reheat operation
: activated at [6-06], heat up
domestic hot water untill domestic hot water reheat set
point [6-07] (e.g 45°C ) is reached.
C Disinfection operation
(if activated): activated at [2-02],
heat up domestic hot water untill domestic hot water
disinfection set point [2-03] (e.g 60°C) is reached. Refer to
"[2] Disinfection function" on page 28
t
Time
T
Domestic hot water temperature
T
DHW
Domestic hot water user interface set point
Example 2
: Scheduled storage [6-03]=1, continuous reheat [6-05]=2,
disinfection function [2-01]=1 activated.
A Scheduled storage operation:
activated at [6-04], heat
up domestic hot water untill domestic hot water user
interface set point T
DHW
(e.g 55°C) is reached.
B Continuous reheat operation
: continues activated heat
up domestic water till domestic hot water reheat set point
[6-07] (e.g 45°C) is reached with a hysteresis of [6-08].
C Disinfection operation
(if activated): activated at [2-02],
heat up domestic hot water untill domestic hot water
disinfection set point [2-03] (e.g 60°C) is reached. Refer to
"[2] Disinfection function" on page 28
t
Time
T
Domestic hot water temperature
T
DHW
Domestic hot water user interface set point
[7] DT for booster heater and dual set point control
DT for booster heater (only for EKHW*)
Applies only to installations with a domestic hot water tank
(3)
.
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.
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.
■
[7-00]
Domestic hot water step length: temperature
difference above the domestic hot water set point
temperature before the booster heater is turned off.
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
–[7-01])
T
HP MAX
Maximum heat pump temperature at sensor in domestic
hot 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
DHW
Domestic hot water temperature
T
U
User set point temperature (as set on the user interface)
t
Time
(1) When the unit is configured for restricted power supply condition mode,
see
(2) The scheduled storage/reheat domestic water heating is only applicable in
case [4-03]=4 or 5.
A
B
C
T
t
[2-03]
T
DHW
[6-07]
[6-04]
[6-06]
[2-02]
A
B
C
[6-08]
B
T
t
[2-03]
[6-07]
T
DHW
[6-04]
[2-02]
INFORMATION
■
Make sure that the domestic hot water set point is
according to your requirements.
Start with a low domestic hot water storage set point,
and only increase if you feel that the domestic hot
water supply temperature is not sufficient for your
requirements (this depends on your water using
pattern).
■
Make sure the domestic water is not heated
unnecessary. Start with activating automatic storage
during night (default setting). If it seems that the
scheduled storage domestic water heating during the
night is not sufficient for your requirements, an
additional scheduled reheat during daytime can be
set.
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
INFORMATION
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.
t
T
BH ON
T
DHW
T
HP ON
T
HP OFF
T
HP MAX
T
U
T
BH OFF
[6-01]
[6-00]
[7-00]
[7-01]
T
U
= 70
°
C
[7-00] =
3
°
C
[6-01] =
2
°
C
[6-00] =
7
°
C
HP
BH
HP
5
10
20
30
40
41
48
50
60
71
70
73
