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Technical data
Installer reference guide
194
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10
16.2 Piping diagram: Indoor unit
3D112187C
B1PW
M3S
M1S
B2PR
R3T
R8T
R2T
R1T
R5T
R4T
R7T
A
C
C
l
m
m
a2
a1
c2
c1
g
e
h
k
k
i
j
n
o
j
B
f
C
b1
f
f
C
b2
f
M
M
X
X
k
p
q
r
s1
d2
s2
d1
A
Water side
o
Backup heater
B
Refrigerant side
p
Water filter (main/mixed zone)
C
Field installed
q
Capillary tube
a1
Space heating water IN (additional/direct zone)
r
Pump (main/mixed zone)
a2
Space heating water OUT (additional/direct zone)
s1
Liquid refrigerant IN (cooling mode; evaporator)
b1
Space heating water IN (main/mixed zone)
s2
Gas refrigerant OUT (cooling mode; evaporator)
b2
Space heating water OUT (main/mixed zone)
c1
Domestic hot water: cold water IN
B1PW
Space heating water pressure sensor
c2
Domestic hot water: hot water OUT
B2PR
Refrigerant pressure sensor
d1
Gas refrigerant IN (heating mode; condenser)
M1S
3-way valve (mixing valve for the main/mixed zone)
d2
Liquid refrigerant OUT (heating mode; condenser)
M3S
3-way valve (space heating/domestic hot water)
e
Plate heat exchanger
R1T
Thermistor (heat exchanger – water OUT)
f
Shut-off valve for service (if equipped)
R2T
Thermistor (backup heater – water OUT)
g
Expansion vessel
R3T
Thermistor (liquid refrigerant)
h
Magnetic filter/dirt separator
R4T
Thermistor (heat exchanger – water IN)
i
Safety valve
R5T, R8T
Thermistor (tank)
j
Air purge
R7T
Thermistor (main/mixed zone – water OUT)
k
Drain valve
Screw connection
l
Pump (additional zone/direct zone)
Flare connection
m
Check valve
Quick coupling
n
Flow sensor
Brazed connection
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