EN/10.2021/i04 © STULZ S.p.A. – all rights reserved
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
problem
possible cause
Recommended intervention
9. The chiller runs
continuously
No refrigerant gas
See point 7
Incorrect thermostat configuration
Check and restore the original configuration
Excessive thermal load
Reduce thermal load
10.
The chiller
runs but does not
cool down
No refrigerant gas
See point 7
Presence of humidity in the refrigerant
circuit
Discharge, dry the circuit, replace the filter, make vacuum and
recharge.
Open hot gas bypass valve
Check and/or replace it
11.
The chiller
produces
anomalous
noise
Noisy compressor
Scroll compressor with incorrect rotation. Check the
correspondence between the motor winding connection and
the electrical diagram on the motor. Invert the phases in order
to comply with the correct rotation.
Noisy thermostatic valve
Check and/or replace it
Vibrations coming from the pipes
Check and/or bracket the pipes
Noisy body
Check the fixing of the hardware
11. Decommissioning and disposal
of the unit
The decommissioning of the chillers must be carried out by experienced and qualified personnel.
DANGER
This unit contains refrigerant and a small quantity of lubricant (ester) inside its compressor.
These substances are dangerous for the environment and must not be dispersed in it.
Refrigerants containing fluorocarbons contribute to global warming and consequently to
climate changes. They must be disposed of in accordance with disposal standards or they
must be delivered to firms qualified as specialized waste disposal firms.
WARNING
Cut off power supply. Switch off power conducting cables to the unit and secure them
against being switched on again. Disconnect the A/C unit from the de-energized network.
Move the unit as described in paragraph “Moving and storage”, with a lifting device of suitable
capacity. The following are the instructions for proper disposal of the unit during the various
phases of its life. For further clarification or additional information, please contact [email protected].
INFoRmATIoN
To ensure proper and safe disposal activities, operator must equip themselves with the
necessary PPE including: anti-cut gloves, oil resistant gloves, heat resistant gloves, safety
footwear, safety eyewear against liquid and gas splashes.
The context in which the unit is located may require the use of additional PPE, thus it is
mandatory to inquire with the relevant staff of the area before starting operation.
Once the materials have been separated as shown below, they should be assigned EWC codes
and then sent for disposal in accordance with the national legislation.
Disposal related to the unit purchased occurs in three stages:
50
50
