AHE00049 2002
7
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
3.9 Commissioning
All connections must be thoroughly leak tested and the system evacuated in line with normal refrig-
eration practice. All bolts, fastenings, electrical connections etc., must be checked for security. In
addition, the fans should be checked for correct rotation. If necessary, change the phase wiring to
obtain correct rotation. Set all apparatus to operating temperatures and test run the heat exchanger
to check for undue vibrations, badly secured components, etc.
3.10 Disposal
After decommissioning the heat exchanger coil should be emptied from refrigerant fluids. Avoid
any emissions in the environment. Any refrigerants and oil residuals must be properly disposed of
according to applicable environmental regulations. The fully emptied heat exchanger unit, including
all electrical components, should be handed in to the proper authoritized companies for recycling.
4 Maintenance
4.1 General
It is essential after delivery that adequate protection and inspection are carried out on the equip-
ment. This is especially important if there is any delay in installing or commissioning the equipment.
After commissioning and adjusting, the heat exchanger will require maintenance. Regular checks
and good maintenance will ensure trouble-free operation. The frequency of checks will depend on
the site location and specific operating conditions. Equipment installed in industrial or coastal areas
generally requires more frequent inspections than the same equipment in rural, unpolluted areas.
Damage can occur during site installation and during the period prior to commissioning. Inspections
and remedial work must take place during this period. On sites where building work is in progress, it
is strongly advised that the entire heat exchanger be covered up to protect it from dirt and damage
until the time of commissioning.
4.2 Cleaning
A coil block should be kept clean to guarantee it works well. The user of the heat exchanger should
ensure that the cleaning agents that are used do not have a corrosive effect on the materials used
by Alfa LU-VE.
4.3 Casing
Casework checks should be carried out at least every 3 months. In doing so, inspect for any dete-
rioration of the coating and/or corrosion. If such flaws are noted, take immediately remedial action.
Should any damage occur during installation, this should be repaired to prevent further deteriora-
tion.
4.4 Coil
The heat exchanger coil should be checked at least every 3 months for contamination and any
improper material. In addition, any unusual vibration of the fans should be checked. The coil should
be cleaned as instructed when necessary, using low pressure compressed air or a jet of water
directed inverse to the air flow and perpendicular to the coil to prevent bending or damaging of the
fins. If fins are bent, they can be straightened using the repairing tool (comb). Care must be taken
not to direct the water jet directly onto fan motors or electric control panels. It should be noted that
abnormal atmospheric conditions can greatly harm the lifetime of the finned coil.
4.5 Fans
Fans should be checked 3 months after commissioning and thereafter depending on operating
conditions and as experience dictates, for any dirt build-up and/or undue vibration, which could
ultimately cause damage to the fan or the heat exchanger itself. Ensure complete electrical isolation
before removing the fan guards. Fan blades should also be checked for any erosion or corrosion
and remedial action taken as necessary. All dirt and other contamination (e.g. ice or snow) should
be removed to avoid imbalanced running of the fan and motor bearing overheating. The security of
the fan fastenings and the integrity of the components should be checked integrally as part of the
routine maintenance operation. Particular attention should be paid to the fastening screws and bal-
ance of the fan blades.
Where fan guards or portions of the casing have had to be removed for inspection, ensure that
these items have been refitted and secured correctly before restarting the heat exchanger.
EN