Daikin Altherma 3 R F, Installer'S Reference Manual

Page: 51 / 312

6 | Application guidelines
Installer reference guide
51
ERLA11~W1 + EBVH16SU23DJ
Daikin Altherma 3 R F
4P655196-1 – 2021.09
NOTICE
▪
Make sure the bivalent hysteresis has enough differential to prevent frequent
changeover between indoor unit and auxiliary boiler.
▪
Because the outdoor temperature is measured by the outdoor unit air
thermistor, install the outdoor unit 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.
Changeover to external heat source decided by an auxiliary contact
▪ Only possible in external room thermostat control AND one leaving water
temperature zone (see
"6.2 Setting up the space heating/cooling system" [
4
34]).
▪ The auxiliary contact can be:
- An outdoor temperature thermostat
- An electricity tariff contact
- A manually operated contact
- …
▪ Setup: Connect the following field wiring:
L
N
H Com
A
K2A K1A
X2M
BTI
K2A K1A
Indoor/Auto/Boiler
35 30 X Y
Indoor
B
TI
Boiler thermostat input
A Auxiliary contact (normally closed)
H Heating demand room thermostat (optional)
K1A Auxiliary relay for activation of indoor unit (field supply)
K2A Auxiliary relay for activation of boiler (field supply)
Indoor Indoor unit
Auto Automatic
Boiler Boiler
6.4 Setting up the domestic hot water tank
6.4.1 System layout – Integrated DHW tank
A
a
b
A Domestic hot water
a Cold water IN
b Hot water OUT