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16.2 Piping diagram: Outdoor unit
d
k
i
i
R5T
j
Gas Gas
Liquid Liquid
a Water IN (screw connection, male, 1")
b Water OUT (screw connection, male, 1")
c Plate heat exchanger
d Pinched pipe
e Refrigerant filter
f One-way valve
g Economiser heat exchanger
h Service port 5/16" flare
i Capillary tube
j Distributor
k Air heat exchanger
l PCB cooling
m Accumulator
n Muffler
E1HHEX Plate heat exchanger heater
M1C Compressor
M1F Fan motor
S1PH High pressure switch (5.6 MPa)
S2PH High pressure switch (4.17 MPa)
S1PL Low pressure switch
S1NPH High pressure sensor
Y1E Electronic expansion valve (main)
Y3E Electronic expansion valve (injection)
Y1S Solenoid valve (4-way valve)
Y2S Solenoid valve (low pressure bypass)
Y3S Solenoid valve (hot gas bypass)
Y4S Solenoid valve (liquid injection)
EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1D – 2023.10
h
*
l
Y4S
M1F
i
i
S1PL
m
Y1E
e
f
f
g
Y3E
sv
Y2S
Y1S
sv
Y3S
n
n
R2T
R7T
R8T
M1C
Thermistors:
R1T Outdoor air
R2T Compressor discharge
R3T Compressor suction
R4T Air heat exchanger, distributor
R5T Air heat exchanger, middle
R6T Refrigerant liquid
R7T Compressor shell
R8T Compressor port
R9T Entering water
R10T Leaving water
Refrigerant flow:
Heating
Cooling
16
|
e
f
f
d
Gas
Liquid
S1NPH
e
S1PH
*
EPRA-DAV3* &
EPRA-DBW1*
EPRA-DAW1*
Technical data
c
R10T
b
a
R9T
l
3D124079D
Installer reference guide
273
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