Daikin SERHQ020BAW1, Installation And Operation Manual

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3 About the units and options
Installation and operation manual
7
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-2B – 2018.01
2.2 Indoor unit
2.2.1 To remove the accessories from the
indoor unit
8×
a d e c
1×
b
1× 1×
f g
h
2×
1× 1× 1×/2×
i
2×
j k
3× 2×
l
2×
a General safety precautions
b Installation manual and operation manual (panel 3)
c User interface (panel 3)
d Tie wraps (panel 3)
e Shut-off valves (panel 3)
f Threaded connection (panel 3) (1× for 32BAW,
2× for 64BAW)
g Filter (panel 3)
h Elbow (panel 3)
i Black grommet (2×)
j L-shaped support (2×)
k M5 screws (3×)
l Accessory pipes (Ø12.7→Ø9.52 and Ø25.4→Ø28.6)
3 About the units and options
3.1 Identification
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
3.1.1 About the outdoor unit
SERHQ outdoor units are designed for outdoor installation and are
meant to be combined with SEHVX indoor units.
The outdoor units are designed to work in heating mode at ambient
temperatures from –20°C WB to 15.5°C WB and in cooling mode at
ambient temperatures from –5°C DB to 43°C DB.
3.1.2 About the indoor unit
The SEHVX indoor units are intended for indoor installation and can
be used for air conditioning purposes or for supplying water for
process cooling applications.
The units are available in 4 standard sizes with nominal capacities
ranging from 21.2 to 63.3 kW.
The unit is designed to work in heating mode at ambient
temperatures from –15°C to 35°C and in cooling mode at ambient
temperatures from –5°C to 43°C.
The main component is the water heat exchanger.
The indoor unit is connected to the outdoor unit by field refrigerant
piping and the compressor in the outdoor unit circulates refrigerant
into the heat exchangers.
▪ In cooling mode, the refrigerant transports the heat taken from the
water heat exchanger to the air heat exchanger where the heat is
released to the air.
▪ In heating mode, the refrigerant transports the heat taken from the
air heat exchanger to the water heat exchanger where the heat is
released to the water.
3.1.3 Operation range
Cooling
43
–5
0
0 5 20 25
LWE
T
A
A B
T
A
Ambient temperature (°C DB)
LWE Leaving water evaporator temperature (°C)
A Standard water operation range
B Pull down area
Heating
0
35
25
5
–15
5 (EWC) 20 25 35 50
LWC
T
A
A B
T
A
Ambient temperature (°C DB)
LWC Leaving water condenser temperature (°C)
EWC Entering water condenser temperature (°C)
A Pull up area
B Standard water operation range
3.2 System layout
RC
RT1
M1
RT2
M2
RT3
M3
FC1 FC2 FC3
a c e f
f g g g
h
d b
a Outdoor unit