Scheduled Mode; Scheduled + Reheat Mode - Daikin EBLA09DAV3 User Reference Manual

5 | Operation

5.7.3 Scheduled mode

5.7.4 Scheduled + reheat mode

User reference guide
32
INFORMATION
Risk of space heating capacity shortage for domestic hot water tank without internal
booster heater: In case of frequent domestic hot water operation, frequent and long
space heating/cooling interruption will happen when selecting the following:
Tank > Heat up mode > Reheat only.
INFORMATION
When the DHW tank mode is reheat, the risk for capacity shortage and comfort
problem is significant. In case of frequent reheat operation, space heating/cooling
function is regularly interrupted.
In scheduled mode the DHW tank produces hot water corresponding to a schedule.
The best time to allow the tank to produce hot water is at night, because the space
heating demand is lower.
Example:
T t
60°C
50°C
40°C
15°C
00:00
T DHW tank temperature
t
t Time
▪ Initially, the DHW tank temperature is the same as the temperature of the
domestic water entering the DHW tank (example: 15°C).
▪ At 00:00 the DHW tank is programmed to heat up the water to a preset value
(example: Comfort = 60°C).
▪ During the morning, you consume hot water and the DHW tank temperature
decreases.
▪ At 14:00 the DHW tank is programmed to heat up the water to a preset value
(example: Eco = 50°C). Hot water is available again.
▪ During the afternoon and evening, you consume hot water again and the
DHW tank temperature decreases again.
▪ At 00:00 the next day, the cycle repeats.
In scheduled + reheat mode, the domestic hot water control is the same as in
scheduled mode. However, when the DHW tank temperature drops below a preset
value (=reheat tank temperature – hysteresis value; example: 35°C), the DHW tank
heats up until it reaches the reheat set point (example: 45°C). This ensures that a
minimum amount of hot water is available at all times.
Example:
1
2
4
3
5
07:00 14:00 21:00
t
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620245-1A – 2021.02