Daikin HXHD125A7V1B Installation Manual page 8

1
R6T
4
9
10
1 Refrigerant side
2 Outdoor unit (REYAQ)
3 Option domestic hot water tank
4 Muffler
5 Check valve
6 Filter
7 Field piping Ø12.7
8 Field piping Ø9.52
9 Compressor
10 Accumulator
11 Cascade heat exchanger
12 Service port
13 Heating heat exchanger
14 Drain port
15 Expansion vessel
16 Air purge
Installation manual
6
2
7 8
5
6
11
R7T
6
K2E
12 12
R3T
K1E
R5T
Q2L
13
M1P
14
6
B1PH High pressure sensor
B1PL Low pressure sensor
K1E Electronic expansion valve (R410A)
K1S 3-way valve
K2E Electronic expansion valve (R134a)
M1P Pump
Q2L Thermistor protector water piping
S1PH High pressure switch
A/B
16
R4T
15
M K1S
A
17 Shut-off valve
18 Water outlet
19 Water inlet
20 Blow off
21 Safety valve
22 Pressure gauge
A Install the 3-way valve in case of domestic hot water tank
B Standard
17
18
3
17
6
19
20
22
21
B
HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010