Daikin ALTHERMA HT EKBUHAA6 V3, Service Manual

Page: 88 / 302

Outline of Control (Indoor Unit) ESIE09-08A
76 Function
2. Storage operation
When requesting space heating and domestic water heating (storage) at the same time, this involves
that the minimum reheat temperature is reached (setting [b-00]) during space heating operation. The
3-way valve will switch over to the domestic hot water side, then the domestic water will be heated,
but as soon as the room temperature drops 3°C from set point (smart logic), the 3-way valve will go to
original position and start space heating till 0.5°C above set point, then the 3-way valve will switch
over to the domestic hot water side and then the domestic water will be heated again till storage set
point.
Remark:
a. The minimum operation time is only valid when room temperature is more than 3°C lower as set point
and set point J is reached.
b. The maximum operation time is only valid when room temperature is more than 0.5°C lower as set point
and set point J is reached.
A Operation
Space heating
Domestic water heating
B Domestic hot water storage thermo-on request
C Domestic hot water tank temperature
D Room temperature thermo-on request
E Remote controller room temperature
F Domestic hot water lower limit temperature
G Domestic hot water upper limit temperature (maximum possible storage temperature) [b-03]
J Domestic hot water reheat maximum temperature [b-01]
K Remote controller thermostat set point
M Simultaneous demand
N ONLY domestic hot water request
R Point where space heating gets priority
ON ON
OFF OFF
1 Minimum operation time for domestic water heating (initial 10 minutes [d-00])
(a)
2 Maximum operation time for domestic water heating (initial 30 minutes [d-01])
(b)
3 Interval minimum stop time for domestic water heating (initial 15 minutes [d-02])
N=4 No simultaneous operation
5 Timers for domestic water heating start
6 Timer for space heating start
A
M R N
B
C
J
K
75°C
35°C
–3.0°C
–0.5°C
+0.5°C
ON
G
F
OFF
D
E
ON
OFF
1 3
2
4
6
5