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Technical data
Installer reference guide
199
E EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
16.2 Piping diagram: Indoor unit
3D111411A
B1PW
M3S
B2PR
R3T
R8T
R2T
R1T
R5T
R4T
A
C
C
l
a2
a1
b2
g
e
h
k
k
i
j
m
n
j
d1
c2
d2
c1
B
k
f
f
b1
C
t
*s
o
p
q
o
*r
A
Water side
o
Shut-off valve (recommended)
B
Refrigerant side
p
Non-return valve (recommended)
C
Field supplied
q
Pressure reducing valve (recommended)
*r
Pressure relief valve (max. 10 bar (=1.0 MPa))
(mandatory)
a1
Space heating water IN
*s
Tundish (mandatory)
a2
Space heating water OUT
t
Expansion vessel (recommended)
b1
Domestic hot water: cold water IN
b2
Domestic hot water: hot water OUT
B1PW
Space heating water pressure sensor
c1
Gas refrigerant IN (heating mode; condenser)
B2PR
Refrigerant pressure sensor
c2
Liquid refrigerant OUT (heating mode; condenser)
M3S
3-way valve (space heating/domestic hot water)
d1
Liquid refrigerant IN (cooling mode; evaporator)
d2
Gas refrigerant OUT (cooling mode; evaporator)
Thermistors:
e
Plate heat exchanger
R1T
Heat exchanger – water OUT
f
Shut-off valve for service (if equipped)
R2T
Backup heater – water OUT
g
Expansion vessel
R3T
Liquid refrigerant
h
Magnetic filter/dirt separator
R4T
Heat exchanger – water IN
i
Safety valve
R5T, R8T
Tank
j
Air purge
k
Drain valve
Connections:
l
Pump
Screw connection
m
Flow sensor
Flare connection
n
Backup heater
Quick coupling
Brazed connection