Setting Up The Domestic Hot Water Tank; System Layout - Standalone Dhw Tank; Selecting The Volume And Desired Temperature For The Dhw Tank - Daikin Altherma EDLQ011-016CW1 Installer's Reference Manual

5 Application guidelines
L
H Com
Outdoor/Auto/Boiler
A
K1A K2A
N
B Boiler thermostat input
TI
A Auxiliary contact (normal closed)
H Heating demand room thermostat (optional)
K1A Auxiliary relay for activation of outdoor unit (field supply)
K2A Auxiliary relay for activation of boiler (field supply)
Outdoor Outdoor unit
Auto Automatic
Boiler Boiler
Control box Control box
NOTICE
▪ Make sure the auxiliary contact has enough differential
or time delay to prevent frequent changeover between
outdoor unit and auxiliary boiler.
▪ If the auxiliary contact is an outdoor temperature
thermostat, install the thermostat in the shadow so that
it is NOT influenced or turned ON/OFF by direct
sunlight.
▪ Frequent changeover may cause corrosion of the
auxiliary boiler. Contact the manufacturer of the
auxiliary boiler for more information.
5.4 Setting up the domestic hot water
tank
5.4.1 System layout – Standalone DHW tank
a b c
d
e
d
f
g
a Outdoor unit
b Heat exchanger
c Pump
d Shut‑off valve
e Backup heater (option)
f Control box
g User interface
h Motorised 3‑way valve
i Domestic hot water tank
j Heat exchanger coil
k Collector (field supply)
FHL1...3 Under floor heating
Installer reference guide
20
Control box
B TI
X2M
1 4 X Y
K1A K2A
h k
M
FHL1
FHL2
j
FHL3
i
5.4.2 Selecting the volume and desired
temperature for the DHW tank
People experience water as hot when its temperature is 40°C.
Therefore, the DHW consumption is always expressed as equivalent
hot water volume at 40°C. However, you can set the DHW tank
temperature at a higher temperature (example: 53°C), which is then
mixed with cold water (example: 15°C).

Selecting the volume and desired temperature for the DHW tank

consists of:
1 Determining the DHW consumption (equivalent hot water
volume at 40°C).
2 Determining the volume and desired temperature for the DHW
tank.
Determining the DHW consumption
Answer the following questions and calculate the DHW consumption
(equivalent hot water volume at 40°C) using typical water volumes:
Question
How many showers are needed
per day?
How many baths are needed per
day?
How much water is needed at the
kitchen sink per day?
Are there any other domestic hot
water needs?
Example: If the DHW consumption of a family (4 persons) per day
is as follows:
▪ 3 showers
▪ 1 bath
▪ 3 sink volumes
Then the DHW consumption = (3×100 l)+(1×150 l)+(3×10 l)=480 l
Determining the volume and desired temperature for the DHW
tank
Formula
V =V +V ×(T −40)/(40−T )
1 2 2 2 1
V =V ×(40−T )/(T −T )
2 1 1 2 1
V DHW consumption (equivalent hot water volume at 40°C)
1
V Required DHW tank volume if only heated once
2
T DHW tank temperature
2
T Cold water temperature
1
Possible DHW tank volumes
Type
Standalone DHW tank
EBLQ+EDLQ011~016CAV3+W1 + EK(2)CB07CAV3 +
Daikin Altherma low temperature monobloc
Typical water volume
1 shower = 10 min×10 l/min =
100 l
1 bath = 150 l
1 sink = 2 min×5 l/min = 10 l
—
Example
If:
▪ V =180 l
2
▪ T =54°C
2
▪ T =15°C
1
Then V =280 l
1
If:
▪ V =480 l
1
▪ T =54°C
2
▪ T =15°C
1
Then V =307 l
2
Possible volumes
▪ 150 l
▪ 180 l
▪ 200 l
▪ 250 l
▪ 300 l
▪ 500 l
EKMBUHCA3V3+9W1
4P522034-1 – 2018.01