25
10
MAINTENANCE AND PERIODIC CHECKS
CAUTION: All the operations described in this chapter MUST BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY.
Before performing any intervention on the unit or accessing internal parts, make sure you have disconnected power.
The heads and delivery pipe of the compressor are normally quite hot. Be careful when working near the condensing
coils. The aluminium fins are very sharp and can cause serious injuries. After servicing operations, re-install the cover
panels, and fix them by means of screws.
CAUTION: Before starting to operate, safety checks must be performed to ensure the combustion hazard is reduced
to the minimum. The work must be undertaken according to a controlled procedure, to reduce to the minimum the
risk of flammable gases or vapours while performing the work. The area must be checked with an appropriate
refrigerant fluid detector before and during the work.
Maintenance must only be carried out in weather conditions suitable for the operations envisaged
ATTENTION: It is possible that a certain amount of compressor oil is deposited in the pipes of the refrigeration circuit,
especially at bends. In case of maintenance operations in which it is necessary to unsolder the pipes, it is advisable to
proceed with the cutting of the same and not with the desoldering by means of a torch, to avoid the danger of
triggering the oil present.
It is prohibited to fill the refrigerant circuits with a refrigerant other than that indicated on the identification plate.
Using a different refrigerant can cause serious damage to the compressor.
It is prohibited to use oils other than those indicated in this manual. Using a different oil can cause serious damage to
the compressor
The heads and delivery pipe of the compressor are normally quite hot.
Be careful when working near the condensing coils.
The aluminium fins are very sharp and can cause serious injuries.
After the maintenance operations, close the panels by fixing them with screws.
After maintenance operations, pay attention to the correct tightening of the cable gland designed for the passage of
the power supply cable
It is recommended to have specialised personnel perform periodical inspections and maintenance. The EU regulation
n.517/2014 establishes that users must perform regular inspections on the plants, checking water tightness and
eliminating any leaks as quickly as possible. Verify the mandatory nature and the documentation required in
regulation n.517/2014 and its subsequent amendments or repeals.
It is a good rule to carry out periodic checks in order to verify the proper operation of the unit.
The list of operations to be performed is shown in the following table.
OPERATION
Filling the water circuit.
x
Presence of bubbles in the water circuit.
x
Check the proper working of the safety and control devices.
x
Check that there are no oil leaks from the compressor.
x
Check if there is a possible water leakage from the water circuit.
x
Check that the flow switch works properly.
x
Check that the crankcase heaters are powered and running.
x
Clean the metal filters of the water circuit.
x
Clean the finned coil with compressed air or water jet
x
Check that the electric terminals both inside the electric panel and in the terminal blocks of the
compressor are well tightened.
x
Tightening of plumbing connections.
x
Check fixing and balancing of the fans.
x
Clean the air filters in the electrical box or replace them if necessary
x
Correct electric voltage and phase imbalance (empty and under load).
x
Correct absorption.
x
Check the refrigerant charge and any losses
x
Check the operating pressure, superheating and sub-cooling.
x
If the unit will remain out of service for a long period, drain the water from the pipes and the heat
x
Summary of Contents for HP-OWER ONE R Series
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