Setting Up The Domestic Hot Water Tank; System Layout - Integrated Dhw Tank; System Layout - Standalone Dhw Tank - Daikin EAVH16S23DA6V Installer's Reference Manual

6 | Application guidelines

6.4 Setting up the domestic hot water tank

6.4.1 System layout – Integrated DHW tank
6.4.2 System layout – Standalone DHW tank
Installer reference guide
44
NOTICE
▪
Make sure the auxiliary contact has enough differential or time delay to prevent
frequent changeover between indoor 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.
Setpoint of the auxiliary gas boiler
To prevent freeze-up of the water piping, the auxiliary gas boiler must have a fixed
setpoint ≥55°C, or a weather-dependent setpoint ≥T
T (°C)
min
60
50
40
30
20
10
0
–30 –25 –20
T Outdoor temperature
a
T Minimum weather-dependent setpoint for auxiliary gas boiler
min
a
a Outdoor unit
b Indoor unit
c Heat exchanger
d Backup heater
e Pump
f Motorised 3‑way valve
g DHW tank
h Shut-off valve
i Collector (field supply)
FHL1...3 Floor heating loops (field supply)
UI User interface
a Outdoor unit
–15 –10 –5
b
A
EPGA11~16DAV3(7) + EAVH/X16S18+23DA6V(7)+9W(7)
.
min
0 5
T (°C)
a
Daikin Altherma 3 H F
4P556070-1A – 2021.09