M02
J40
M6-
04
WDAT-3
2.160-3.660
- S T AR T - U P -
44
VERIFY TENSIONS – ABSORPTIONS
Check that the temperatures of the fluids are included in the WORKING LIMITS.
If the controls of the previous paragraphs are positive, it is possible to restart the unit.
For information on the control panel, refer to the paragraph SETTING.
While the unit is working (ATTENTION ELECTRIC RISK: WORK SAFETLY) check:
•
Power supply tension
•
Phase
unbalance
•
Total absorption of the unit
•
Absorption of the single electric loads
REMOTE INPUT CONFIGURATIONS
Check used remote inputs are activated (ON-OFF etc.) as given in the instructions in the ELECTRIC WIRING chapter.
SETTING THE SET-POINT
Check if it is necessary to modify the set-points shown in the SETTING chapter.
WATER-FLOW CHECK
Verify that the difference between the water at the input and at the output of the exchanger is related to the capacity
according to the formula:
refrigerating capacity of the unit (kW) x 860 = Dt (°C) x flow rate (L/h).
The refrigerating capacity is shown in the GENERAL TECHNICAL FEATURE chart of this manual and it refers to specific
water/air conditions or to the tables of COOLING PERFORMANCES on TECHNICAL CHART that refer to different use
conditions.
Verify the loss of charge of the exchanger at the water side:
·
determine the water capacity
·
measure the difference of pressure between the input and output of the exchanger and compare it with the
graph LOSS OF CHARGE OF THE EXCHANGER AT THE WATER SIDE
The pressure measurements will be easier if “M” gauges are installed as shown in the HYDRAULIC CONNECTION
DIAGRAM.
REFRIGERANT CIRCUIT PARAMETER CHECK
When the unit works in stable conditions and according to the operating limits, take note of the following data:
1. compressor diacharge temperature (WARNING – BURN DANGERI)
2. condensing
pressure
3. liquid
temperature
4. dehydrator filter upstream and downstream temperature
5. inlet
pressure
6. inlet
temperature
7. input water temperature
8. output water temperature
9. external air temperature (battery input)
10. air temperature coming out from fans
The data will be useful to check the unit in the future; therefore, it is important that the data are kept carefully and are
available when maintenance is performed.
REDUCED LOAD OPERATION
The units are equipped with partialization steps and they can, therefore, operate with reduced loads.
Nevertheless, a constant and long operation of reduced loading with frequent stops and start-ups of the compressor/s
can cause serious damage for the lack of oil return.
The above-described operations should be considered OUTSIDE the norm.
In the event of failure in the compressors, since the unit operates with the above-mentioned conditions, the guarantee
WILL NOT BE VALID and Clivet spa can not be held responsible for it.
Periodically check the average times of operations and the frequency of the compressors pick ups: the minimum thermal
load should be enough to ask the operation of a compressor for at least ten minutes.
In the event of average times close to this limit, take the proper corrective actions.
Summary of Contents for WDAT-3 2.160
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