Daikin EWWD120J-SS Manuel D'installation Et D'opération page 7

and the water inlet temperature sensor and the
water outlet pipe with the outlet water temperature
sensor, are not factory mounted.
•
Connecting the water inlet pipe containing
the flowswitch.
The water inlet pipe containing the
flowswitch.is mounted on the side of the
water inlet of the evaporator(s) and is pre-
insulated.
Cut the tie wraps and fix the pipe with the
supplied Victaulic
evaporator inlet(s).
•
Connecting the water outlet pipe.
The water outlet pipe is mounted on the
side of the water outlet of the evaporator
and is pre-insulated.
Cut the tie wraps and fix the pipe(s) with the
supplied Victaulic
evaporator outlet(s).
•
After installation of the water inlet and otlet
pipes and as a geheral rule for other units, it
is recommended to check the insertion depth
of the water temperature sensors into the
connection pipes prior the operation (see
figure).
Connecting the filter
•
The filter kit supplied with the unit must be
installed in front of the evaporator water inlet
by means of
couplings as shown in the figure. The filter
has holes of diameter 1,0 mm and secures
the evaporator against clogging.
•
Improper installation of the supplied filter will
result in severe damage of the equipment
(freezing of the evaporator).
A field supplied blow down port for flushing fluid and
accumulated material from inside the filter can be
connected on the filter end cap.
•
Connecting the counter pipes
Weld the supplied counter pipes to the ends of the
water circuit and connect to the unit with the provided
Victaulic® couplings.
2 Drain taps must be provided at all low points of the
system to permit complete drainage of the circuit during
maintenance or in case of shut down. The drain plug is
provided to drain the condenser. When doing this, also
remove the air plugs (refer to the outlook diagram).
3 Air vent must be provided at all high points of the
system. The vents should be located at points which
are easily accessible for servicing.
4 Shut-off valves should be provided at the unit so that
normal servicing can be accomplished without draining
the system.
5 Vibration eliminators in all water piping connected to the
chiller are raccomended to avoid straining the piping
and transmitting vibration and noise.
All manuals and user guides at all-guides.com
® couplings to the
® couplings to the
≤50 mm
the supplied Victaulic®
6 For units in double circuit configuration with common
leaving water control (ELWT), be sure to foresee an
insertion hole for the additional water temperature
sensor. Sensor and sensor holder are optional parts.
The insertion hole shall be 1/4" GAS female thread and
should be located in the mixed waterflow of the chillers.
Make sure that the sensortip is in the waterflow and that
you have a length of straight pipe (L) of at least 10x the
pipe diameter (A) before the sensor.
Choose the position of insertion in a way that the cable length
of the sensor (10 m) is long enough.
WATER CHARGE, FLOW AND QUALITY
To assure proper operation of the unit, the water flow through
the evaporator must be within the operation range as specified
in the table below and a minimum water volume is required in
the system.
Minimum water
Model
flow
EWWD120J - EWLD110J
EWWD140J - EWLD130J
EWWD150J - EWLD145J
EWWD180J - EWLD165J
EWWD210J - EWLD195J
EWWD250J - EWLD235J
EWWD280J - EWLD265J
EWWD310J - EWLD290J
EWWD330J - EWLD310J
EWWD360J - EWLD330J
EWWD380J - EWLD360J
EWWD400J - EWLD390J
EWWD450J - EWLD430J
EWWD500J - EWLD470J
EWWD530J - EWLD500J
EWWD560J - EWLD530J
The minimum water volume v [l] in the system must fullfill the
criteria below:
v>(Q/2)xT/(Cx∆T)
Q highest cooling capacity of the unit in lowest
capacity step within the range of application (kW)
t antirecycling timer of unit (AREC)/2(s)=300 s
C specific heat capacity of the fluidum
(kJ/kg°C)=4,186 kJ/kg°C for water
∆T temperature difference between starting and
stopping of the compressor:
∆T=a+2b+c
(for designation of a, b and c, refer to the
operation manual
NOTE For units in a double circuit configuration, the
minimum required water volume in the system
must equal the biggest required minimum
D-EIMWC01004-14EU - 7/190
Maximum water
flow
l/min l/min
168 671
195 780
221 883
255 1021
290 1158
357 1428
397 1588
441 1766
476 1903
510 2041
545 2179
579 2316
646 2586
714 2855
754 3016
794 3176