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Installation manual
4
EWLD120~540MBYNN
Condenserless water-cooled water chillers
4PW22686-1J
Charging the unit
1 Perform an integral pre-start inspection like explained in chapter
"Before starting" on page 8.
It is also necessary to read the operation manual delivered with
the unit. This will contribute to understand the operation of the
unit and its electronic controller.
Pre-charge of refrigerant without operation of the unit
2 Calculate the refrigerant pre-charge according to table below:
VRC=volume of remote condenser (l)
LLP=length of liquid pipe (m)
3 Use the 3/8” stop valve on the filter drier to pre-charge the unit
with the complete calculated pre-charge.
Do not operate the compressor for pre-charging, this to
avoid compressor damage!
4 After completion of procedure step 3, perform an “initial start”
test:
4.1 Start the compressor and wait for the compressor to go through
the star/delta.
Carefully check during start-up:
■ that compressor is not producing any abnormal noise or
vibration;
■ that high pressure rises and low pressure drops within 10
seconds after start to evaluate if the compressor is not
operating in reverse due to wrong wiring;
■ that no safeties are activated.
4.2 Stop the compressor after 10 seconds.
Fine-tuning of refrigerant charge while unit is in operation
5 Use the 3/8” valve on the suction side of the compressor for fine-
tuning of the refrigerant charge and make sure to charge the
refrigerant in its liquid state.
5.1 For fine-tuning of the refrigerant charge, the compressor must
operate at full load (100%).
5.2 Verify the superheat and subcooling:
■ superheat must be between 3 and 8 K
■ subcooling must be between 3 and 8 K
5.3 Verify the oil sightglass. Level must be within the sightglass.
5.4 Verify the liquid-line sightglass. It should be sealed and not
indicate moisture in the refrigerant.
5.5 As long as the liquid-line sightglass is not sealed, add refrigerant
in steps of 1 kg and wait until the unit runs in stable conditions.
Repeat the complete procedure step 5 until the liquid-line
sightglass is sealed.
The unit must have the time to stabelize which means that this
charging has to be done in a smooth way.
6 Note down the superheat and subcooling for future reference.
7 Fill out the total refrigerant charge on the unit nameplate and on
the refrigerant charge label supplied with the product.
PREPARING, CHECKING AND CONNECTING THE
WATER CIRCUIT
The units are equipped with a water inlet and water outlet for connec-
tion to a chilled water circuit. This circuit must be provided by a
licensed technician and must comply with all relevant European and
national regulations.
1 Preparing the unit for connection to the water circuit
A box containing couplings and a filter is delivered
with the unit.
As not to damage the parts of the units during transport, the water
inlet pipe with the flowswitch 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 and
inlet water temperature sensor: (not for EWLD120)
The water inlet pipe containing the flowswitch and inlet water
temperature sensor 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
couplings to the evaporator inlet(s).
■ Connecting the water outlet pipe containing the outlet water tem-
perature sensor: (not for EWLD120)
The water outlet pipe containing the outlet water temperature
sensor is mounted on the side of the water outlet of the evapora-
tor and is pre-insulated.
Cut the tie wraps and fix the pipe(s) with the supplied
couplings to the evaporator outlet(s).
■ After installation of the water inlet
and outlet pipes and as a general
rule for other units, it is recom-
mended to check the insertion depth
of the water temperature sensors into
the connection pipes prior to operation (see figure).
Carefully perform all required procedures like
explained in chapters from which is referred to in
chapter "Before starting", but do not start the unit.
refrigerant charge (kg)
40 HP 33+(VRC–40)x0.4+LLPx0.3
60 HP 67+(VRC–61)x0.4+LLPx0.5
80 HP 74+(VRC–91)x0.4+LLPx0.7
100 HP 70+(VRC–91)x0.4+LLPx0.7
NOTE
Take care for contamination of the remote condenser
in order to avoid blocking of the system. It is impossible
for Daikin to control the contamination of the "foreign"
condenser of the installer. The unit has a strict
contamination level.
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 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 coupling
6 Counter pipe
7 Field water piping circuit
8 Filter
9 Filter end cap
Victaulic
®
1567
8
432
9
5 5 5
Victaulic
®
Victaulic
®
Victaulic
®
≤ 50 mm
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Productinformatie
| Merk | Daikin |
| Model | EWLD-MBYNN |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 3181 MB |
