Piping Diagram: Indoor Unit - Daikin ETVZ16S18EA6V Installer's Reference Manual

16 | Technical data

16.3 Piping diagram: Indoor unit

B
a2
f q
c2
c1
B
a1
f q
B
b1
f q
B
b2
f q
A Indoor unit
B Field installed
a1 Space heating additional/direct zone – Water IN
(screw connection, 1")
a2 Space heating additional/direct zone – Water OUT
(screw connection, 1")
b1 Space heating main/mixed zone – Water IN (screw
connection, 1")
b2 Space heating main/mixed zone – Water OUT
(screw connection, 1")
c1 DHW – Cold water IN (screw connection, 3/4")
c2 DHW – Hot water OUT (screw connection, 3/4")
d1 Water IN from outdoor unit (screw connection, 1")
d2 Water OUT to outdoor unit (screw connection, 1")
e Pump (main/mixed zone)
f Shut-off valve, male-female 1"
g Expansion vessel
h Magnetic filter/dirt separator
i Safety valve
j Air purge
k Drain valve
l Pump (additional/direct zone)
m Check valve
n Capillary tube
o Backup heater
Installer reference guide
244
A
X
M
M3S
i
g
n
e
p
k
B1PW
j
B1L R1T
R2T
o
R8T
R5T
j
l m
h
k
k
M1S
m
M
X
B1L Flow sensor
B1PW Space heating water pressure sensor
M1S 3-way valve (mixing valve for the main/mixed zone)
M3S 3-way valve (space heating/domestic hot water)
R1T Thermistor (water IN)
R2T Thermistor (backup heater – water OUT)
R5T, R8T Thermistor (tank)
R7T Thermistor (main/mixed zone – water OUT)
S1L Flow switch
Screw connection
Flare connection
Quick coupling
Brazed connection
S1L
B
f
q
B
f
q
R7T
3D120612B
EPRA14~18DAV3+W1 + ETVZ16S18+23EA6V+9W
Daikin Altherma 3 H HT F
d1
d2
4P644739-1 – 2021.02