Daikin EPRA08EAV3, Installer'S Reference Manual

Page: 55 / 292

6 | Application guidelines
Installer reference guide
55
EPRA08~W1 + ETVH/9W
Daikin Altherma 3 H MT F
4P634886-1 – 2021.03
In case of… Use a… power meter
▪ Three-phase outdoor unit
▪ Backup heater supplied from a three-
phase grid (i.e. the backup heater
model is *9W or *6V connected to a
three-phase grid)
Three-phase
(*6V (6T1): 3~ 230 V)
(*9W: 3N~ 400 V)
Example
Single-phase power meter Three-phase power meter
b
580
1 50
0
0
c c
f e d g
A B C
a
A Outdoor unit
B Indoor unit
C DHW tank
a Electrical cabinet (L
1
/N)
b Power meter (L
1
/N)
c Fuse (L
1
/N)
d Outdoor unit (L
1
/N)
e Indoor unit (L
1
/N)
f Backup heater (L
1
/N)
g Booster heater (L
1
/N)
b
580
1 50
0
0
g f e h
A B C
c c d
a

A Outdoor unit
B Indoor unit
C DHW tank
a Electrical cabinet (L
1
/L
2
/L
3
/N)
b Power meter (L
1
/L
2
/L
3
/N)
c Fuse (L
1
/L
2
/L
3
/N)
d Fuse (L
1
/N)
e Outdoor unit (L
1
/L
2
/L
3
/N)
f Indoor unit (L
1
/L
2
/L
3
/N)
g Backup heater (L
1
/L
2
/L
3
/N)
h Booster heater (L
1
/N)
Exception
▪ You can use a second power meter if:
- The power range of one meter is insufficient.
- The electrical meter cannot easily be installed in the electrical cabinet.
- 230 V and 400 V three-phase grids are combined (very uncommon), because of
technical limitations of power meters.
▪ Connection and setup:
- Connect the second power meter to X5M/3 and X5M/4. See "9.3.4 To connect
the electricity meters" [
4
117].
- In the software the power consumption data of both meters is added so you do
NOT have to set which meter covers which power consumption. You only need
to set the number of pulses of each power meter.
▪ See "6.5.4 Preferential kWh rate power supply" [
4
56] for an example with two
power meters.