Piping Diagram: Indoor Unit - Daikin ERLA03DAV3 Installer's Reference Manual

15 | Technical data

15.2 Piping diagram: Indoor unit

C
a2
f
c2
c1
C
a1
f
C
b1
f
C
b2
f
A Water side
B Refrigerant side
C Field installed
a1 Space heating water IN (additional/direct zone)
a2 Space heating water OUT (additional/direct zone)
b1 Space heating water IN (main/mixed zone)
b2 Space heating water OUT (main/mixed zone)
c1 Domestic hot water: cold water IN
c2 Domestic hot water: hot water OUT
d1 Gas refrigerant IN (heating mode; condenser)
d2 Liquid refrigerant OUT (heating mode; condenser)
e Plate heat exchanger
f Shut-off valve for service (if equipped)
g Expansion vessel
h Magnetic filter/dirt separator
i Safety valve
j Air purge
k Drain valve
l Pump (additional zone/direct zone)
m Check valve
n Flow sensor
o Backup heater
p Water filter (main/mixed zone)
q Capillary tube
r Pump (main/mixed zone)
Installer reference guide
172
A
X
M
M3S
i
g
q
r
p
k
B1PW
j
n
R1T
R2T
o
R8T
R5T
j
l m
h
k
k
M1S
m
M
X
B1PW Space heating water pressure sensor
B2PR Refrigerant pressure sensor
M1S 3-way valve (mixing valve for the main zone/mixed zone))
M3S 3-way valve (space heating/domestic hot water)
R1T Thermistor (heat exchanger – water OUT)
R2T Thermistor (backup heater – water OUT)
R3T Thermistor (liquid refrigerant)
R4T Thermistor (heat exchanger – water IN)
R5T, R8T Thermistor (tank)
R7T Thermistor (main/mixed zone – water OUT)
Screw connection
Flare connection
Quick coupling
Brazed connection
B
B2PR
e
R3T
R4T
R7T
ERLA03DAV3 + EHFZ03S18DJ3V
d1
d2
3D112187B
Daikin Altherma 3 R F
4P596821-1A – 2020.05