Daikin SERHQ020BAW1, Installation And Operation Manual

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5 Installation
Installation and operation manual
23
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-2B – 2018.01
NOTICE
Make sure water quality complies with EU directive
98/83 EC.
INFORMATION
The unit may dispose of some excessive water through the
pressure relief valve.
5.7.3 To insulate the water piping
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity as well as prevention of freezing of the
outside water piping during winter time. The thickness of the
insulation materials must be at least 13 mm with λ=0.039 W/mK in
order to prevent freezing of the outside water piping at ambient
temperature of –15°C.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
5.8 Connecting the electrical wiring
5.8.1 Field wiring: Overview
▪ Most field wiring on the unit is to be made on the terminal blocks
inside the electrical component boxes. To gain access to the
terminal blocks, remove the electrical component box service
panel. See
"5.1 Opening the units" on page 11 .
▪ Cable tie mountings are provided at the wiring entries of the
electrical component box.
The wiring diagram is delivered with the unit, located at the inside of
the switch box cover.
5.8.2 To route and fix the power supply
To route and fix the power supply of the outdoor unit
▪ Route the power wiring and the transmission wiring through a
conduit hole.
▪ Route the power wiring though the upper hole in the left side plate,
from the front position of the main unit (through the conduit hole of
the wiring mounting plate), or from a knockout hole in the unit's
bottom plate.
a
b
c
d
e
f g
a Electric wiring diagram (printed on the back of the electrical
component box lid)
b Transmission wiring
c Pipe opening
d Conduit
e Power wiring and ground wiring
f Remove this part before use.
g Through cover
To route and fix the power supply of the indoor unit
LV LV PS PS
LV
PS
HV
PS Power supply
HV High voltage
LV Low voltage
Guide the cables as much as possible through the provided cable
entry glands.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wirings should ALWAYS be
at least 50 mm.
System example
a
b
d
c
B
c
f
e
g h
a Field power supply
b Main switch
c Earth leakage breaker
d Outdoor unit
e Indoor unit
f User interface
g Power supply wiring (sheathed cable) (230 V)
h Transmission wiring (sheathed cable) (16 V)
5.8.3 To connect the power supply of the
outdoor unit
L1 L2 L3 N
a
c
d
b
f
e
g
h
i
j
k
a Power supply (400 V, 3N~ 50 Hz)