M02
J40
M6-
04
WDAT-3
2.160-3.660
- S T AR T - U P -
43
- S T A R T - U P -
ALL THE EQUIPMENT MUST BE COMMISSIONED BY AUTHORISED SERVICE CENTRES.
THIS SERVICE IS LIMITED TO START-UP OF THE UNIT ONLY AND NOT THE CONNECTIONS OR INSTALLATION
OF THE SYSTEM.
ONLY QUALIFIED TECHNICIANS MUST PERFORM THE FOLLOWING OPERATIONS.
PRELIMINARY CHECKS
Before checking, please verify the following:
·
the unit should be installed properly and in conformity with this manual.
·
the electrical power supply line should be sectioned at the beginning.
·
the sectioning device is locked and the proper warning “not to operate” sign is placed on the handle.
·
using a Voltmeter or a tension finder, make sure no tension is present.
The external fans may suffer temporary jamming, especially if they have been inactive for a long time prior to the first
start-up or if the outside temperatures are extremely cold.
They can be released manually (ONLY WITH THE UNIT TURNED OFF AT THE MAINS – OTHERWISE THERE IS
RISK OF INJURY) to avoid seizure or electric overload when the unit turned on.
The circulators are also subject to jamming in the motor shaft: they are easily released using a screwdriver in the
bleeding hole.
REFRIGERANT SYSTEM
Carefully check the refrigerating circuit: the presence of oil stains can mean leakage caused by transportation,
movements or other.
Using the unit manometers, if present, or service manometers, verify that the refrigerating circuit is in pressure.
Make sure that all the service outlets are closed with proper caps; if caps are not presen,t a leak of refrigerant can be
possible.
WATER SYSTEM
Check that the water circuit has been filled and pressurised.
Make sure that there are no leaks.
Check that the shut-off valves in the circuit are in the "OPEN" position.
Check that there is no air in the circuit. If required, bleed it using the vent valves in the system.
When using antifreeze solutions, make sure the glycol percentage is suitable for the type of use envisaged.
% weight of ethylene glycol
10%
20%
30%
40%
Freezing point
- 4°C
- 9°C
- 15°C
- 23°C
Safety temperature
- 2°C
- 7°C
- 13°C
- 21°C
ELECTRICAL SYSTEM
Check the proper tightening of the screws that fix the conductors to the electrical components in the board (during
handling and transportation, the vibrations could have loosened them).
Verify that the unit is connected to the ground plant.
Control that all panels and protection devices of the unit are repositioned and blocked.
Charge the unit by closing the sectioning device, but leave it on OFF.
Make sure that the tension and net frequency values are within the limit of
230 +/- 6% single phase unit and 400/3/50 +/- 6% three-phase unit
Control the unbalancing of the phases: it must be lower than 2%.
Example:
L1 - L2 = 388V L2 - L3 = 379V L3 - L1 = 377V
average of the measured values = (388 + 379 + 377) / 3 = 381
maximum deviation from the average = 388-381= 7V
Unbalancing = (7/381) x 100 = 1.83% = ACCEPTABLE
Operating out of the indicated limits causes the loss of the guarantee as well as very serious damages.
IF THE CRANKCASE HEATERS ARE FITTED
when the unit is started up for the first time and following all prolonged periods of inactivity is OBLIGATORY to connect
the oil heaters on the compressor crankcase at least 8 hours before the compressor is to be starter.
BEFORE POWERING THE RESISTANCES, OPEN THE COMPRESSORS COCKS, IF PRESENT.
To supply the heaters is necessary to switch off the isolator switch on the unit.
To make sure that hte heaters are working, check the power input with amperometic pliers.
At start-up the compressor cranckase temperature on the lower side must be higher at least of 10°C than the external
temperature.
DO NOT START THE COMPRESSOR WITH THE CRANKCASE OIL BELOW OPERATING TEMPERATURE.
Summary of Contents for WDAT-3 2.160
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