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D - EIMWC01006-11EU - 9/192
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
®
couplings to the
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
®
couplings to the
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 the supplied Victaulic®
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.
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.
Model
Minimum water
flow
l/min
Maximum water
flow
l/min
EWWD120J - EWLD110J 168 671
EWWD140J - EWLD130J 195 780
EWWD150J - EWLD145J 221 883
EWWD180J - EWLD165J 255 1021
EWWD210J - EWLD195J 290 1158
EWWD250J - EWLD235J 357 1428
EWWD280J - EWLD265J 397 1588
EWWD310J - EWLD290J 441 1766
EWWD330J - EWLD310J 476 1903
EWWD360J - EWLD330J 510 2041
EWWD380J - EWLD360J 545 2179
EWWD400J - EWLD390J 579 2316
EWWD450J - EWLD430J 646 2586
EWWD500J - EWLD470J 714 2855
EWWD530J - EWLD500J 754 3016
EWWD560J - EWLD530J 794 3176
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
≤
50 mm
Содержание
- Installation operation and maintenance manual 1
- Water cooled screw chillers ewwd120j ss ewwd560j ss condenserless water cooled screw chillers ewld110j ss ewld530j ss refrigerant r 134a 1
- D eimwc01006 11eu 4 192 3
- Ewwd120j ss 280j ss ewld 110j ss 265j ss 3
- Ewwd310j ss 560j ss ewld 290j ss 530j ss 3
- Label identification 3
- Contents content 4
- D eimwc01006 11eu 5 192 4
- Electrical specification 4
- Introducion 4
- Options 4
- Options and feature 4
- Technical specification 4
- D eimwc01006 11eu 6 192 5
- Features 5
- Inspecting and handling the unit 5
- Main components 5
- Operation range 5
- Selection of location 5
- Air or dirt gets in the water circuit problems may occur therefore always take into account the following when connecting the water circuit 6
- D eimwc01006 11eu 7 192 6
- Ewld j version connecting the refrigerant circuit this product is factory charged with 6
- Important information regarding the refrigerant used 6
- Leak test and vacuum drying 6
- The units are equipped with a refrigerant inlet discharge side and a refrigerant outlet liquid side for the connection to a remote condenser this circuit must be provided by a licensed technician and must comply with all relevant european and national regulations precautions when handling piping 6
- Unpacking and placing the unit 1 remove the wooden beams from the unit 2 install vibration mountings in case of an installation where noise and vibration might an impediment 3 set the unit on a solid and level foundation the unit should be installed on a solid base it is recommended to fix the unit on a concrete base with anchor bolts 6
- Air or dirt gets in the water circuit problems may occur therefore always take into account the following when connecting the water circuit 7
- Charging the unit 7
- D eimwc01006 11eu 8 192 7
- Fine tuning of refrigerant charge while unit is in operation 7
- Preparing checking and connecting the water circuit the units are equipped with a water inlet and water outlet for connection to a chiller water circuit this circuit must be provided by a licensed technician and must comply with all relevant european and national regulations 7
- Preparing the unit for connection to the water circuit 7
- Superheat must be between 3 and 8 k subcooling must be between 3 and 8 k 4 verify the oil sightglass level must be within the sightglass 4 verify the liquid line sightglass it should be sealed and not indicate moisture in the refrigerant 4 as long as the liquid line sightglass is not sailed add refrigerant in steps of 1 kg and wait until the 7
- Water inlet of the evaporator 2 flowswitch 3 inlet water sensor 4 water inlet pipe containing the flowswitch and the water inlet temperature sensor 5 victaulic coupling 6 counter pipe 7 field water pipe circuit 8 filter 9 filter and cup 7
- D eimwc01006 11eu 9 192 8
- Water charge flow and quality 8
- Connection of the watercooled water chiller power supply 1 using the appropriate cable connect the power circuit to the l1 l2 and l3 terminals of the unit 2 connect the earth conductor yellow green to the earthing terminal pe 9
- D eimwc01006 11eu 10 192 9
- Discharge from pressure relief devices 9
- Field wiring 9
- Parts table 9
- Piping insulation 9
- Power circuit and cable requirements 1 the electrical power supply to the unit should be arranged so that it can be switched on or off independently of the electrical supply to other items of the plant and equipment in general 2 a power circuit must be provided for connection of the unit this circuit must be protected with the required safety devices i e a circuit breaker a slow blow fuse on each phase and an earth leak detector recommended fuses are mentioned on the wiring diagram supplied with the unit 9
- D eimwc01006 11eu 11 192 10
- D eimwc01006 11eu 12 192 11
- Legend 1s compressor status 1 2s compressor status 2 al analog inputs ao analog output c 3w condenser 3 way valve c l current limit cfs condensator flow switch cle current limit enable cp vfd condenser pump vfd d l demand limit di digital inputs 11
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