Preparing, Checking And Connecting The Water Circuit - Daikin EWWD120J-SS Installations- Betriebs Und Wartungshandbuch

•
that compressor is not producing any abnormal
noise or vibration;
•
that high pressure rises, and low pressure
drops within 10 seconds after to evaluate if the
compressor is not operating in reverse due to
wrong wiring;
•
that no safeties are activated.
3.2. Stop the compressor after 10 seconds.
Fine-tuning of refrigerant charge while unit is in operation
Use the 1/4" SAE Flare valve on the suction for fine-
4.
tuning of the refrigerant charge and make sure to charge
the refrigerant in its liquid state.
4.1. For fine-tuning of the refrigerant charge, the
compressor must operate at full load (100%).
4.2. Verify the superheat and subcooling:
•
superheat must be between 3 and 8 K
•
subcooling must be between 3 and 8 K
4.3. Verify the oil sight glass. Level must be within the
sight glass.
4.4. Verify the liquid line sight glass. It should be sealed
and not indicate moisture in the refrigerant.
4.5. As long as the liquid-line sight glass is not sailed,
add refrigerant in steps of 1 Kg and wait until the
unit runs in stable conditions.
Repeat the complete procedure step 4 until the liquid
line sight glass is sealed.
The unit must have the time to stabilize which means
that this charging has to be done in a smooth way.
5. Note down the superheat and subcooling for future
reference.
6. Fill out the total refrigerant charge on the unit nameplate
and on the refrigerant charge label supplied with the
product.
NOTE Take care for contamination of the remote
condenser in order to avoid blocking of the
system. It is impossible for the manufacturer to
control the contamination of the "foreign"
condenser of the installer. The unit has a strict
contamination level.
11. 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.
If air or dirt gets in the water circuit, problems may occur.
Therefore, always take into account the following when
connecting the water circuit:
1. Use clean pipes only.
2. Hold the pipe end downwards when removing
burrs.
3. Cover the pipe end when inserting it through a wall
so that no dust and dirt enter.
1. Preparing the unit for connection to the water circuit.
A box containing Victaulic
delivered with the unit.
®
couplings and a filter is
1. Water inlet of the evaporator
2. Flow switch
3. Inlet water sensor
4. Water inlet pipe containing the flow switch and the
water inlet temperature sensor
®
5. Victaulic coupling
6. Counter pipe
7. Field water pipe circuit
8. Filter
9. Filter and cup
As not to damage the parts of the units during
transport, the water inlet pipe with the flow switch 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
flow switch.
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
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
outlet(s).
•
After installation of the water inlet and outlet
pipes and as a general 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
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.
D - EIMWC01008-06_02EU - 13/182
couplings to the evaporator
couplings to the evaporator
®
couplings as