Daikin EDLQ036BA6VJU1 Manuel D'installation page 32

[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.
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 hot
difference above the domestic hot water set point temperature before
the booster heater is turned off.
T (°F)
DHW
[7-00]
T
163.4
BH OFF
T
159.8
BH ON
T 158
U
140
T
122
HP MAX
[6-01]
T 118.4
HP OFF
[6-00]
T
105.8
HP ON
104
86
68
HP
50
41
T (°C)
DHW
[7-00]
T
73
BH OFF
T
71
BH ON
T
70
U
60
T
50
HP MAX
[6-01]
T
48
HP OFF
[6-00]
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
BH ON
((T – 4°F) (T
BH OFF BH OFF
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
Installation manual
30
water step length: temperature
[7-01]
T = 158°F
U
[7-00] = 5.4°F
BH HP
[6-01] =
3.6°F
[6-00] = 12.6°F
[7-01]
T = 70°C
U
[7-00] = 3°C
BH HP
[6-01] = 2°C
[6-00] = 7°C
+ [7-00])
U
– 2°C))
– [6-01])
HP MAX
– [6-00])
HP OFF
WARNING
Be aware that the domestic hot water temperature will be
automatically increased (always) with the value selected in
field setting [7-00] compare to the user set point for
domestic hot water (T
the operation manual to select preferable set point.
If this high water temperature can be a potential risk for
human injuries, a mixing valve (field supply) shall be
installed at the hot water outlet connection of the domestic
hot water tank. This mixing valve shall secure that the hot
water temperature at the hot water tap never rise above a
set maximum value. This maximum allowable hot water
temperature shall be selected according to local laws and
regulations.
If the booster heater operation is limited ([4-03]=0), then
set point of field setting parameter [7-00] has only meaning
for powerful domestic water heating.
[7-01] Hysteresis
difference determining the booster heater ON temperature
(T ). T
BH ON BH ON
The minimum
temperature (T
pump OFF temperature (T
Dual set point control
Applies only to installations with different heat emitter which require
different set points.
Dual set point control makes it possible to generate 2 different set
points.
NOTE There is no indication available which set point is
active!
[7-02] Dual set point control status: defines whether the dual
t
set point control is enabled (1) or disabled (0).
[7-03] Second set point heating: specifies the second set
point temperature in heating operation.
[7-04] Second set point cooling: specifies the second set
point temperature in cooling operation.
t
). Refer to field setting [7-00] and
U
value booster heater: temperature
= T – [7-01]
BH OFF
value for booster heater
) is 3.6°F (2°C) (fixed) below heat
BH ON
).
HP OFF
EDLQ036~054BA6VJU1 + EBLQ036~054BA6VJU1
Unit for air to water heat pump system
ON
4PW56182-1