Maintenance; Routine Maintenance - Hitecsa EQU-PF 233 Manual De Instalación, Uso Y Mantenimiento

II.9

MAINTENANCE

IMPORTANT!
Maintenance must be carried out exclusively by
skilled personnel from workshops authorised,
qualified to work on this type of products.
Pay attention to the danger warnings on the unit.
Use the personal protective equipment foreseen by
current laws.
Pay utmost attention to the signs on the machine.
ONLY use original spare parts.
II.9.1

Routine maintenance

Control
General cleaning and inspection of the unit
Finned coils
Compressor: oil check
Tube and shell heat exchangers
Water filter
II.9.1.1 General cleaning and inspection of the unit
The general washing operations must be performed every six months
using a damp cloth.
The general status of the unit must also be verified every six months,
namely, making sure there is no corrosion on the unit framework. Any
corrosion detected must be treated with protective paints in order to
prevent possible damage.
II.9.1.2 Cleaning finned coils
DANGER!
Pay attention to the edges of the coil.
The coils must be washed and brushed gently with water and soap.
Remove any foreign bodies from the surface of the condensing coils,
which can block the passage of air, such as: leaves, paper, debris, and
so on;
Replace the coils should it not be possible to clean them.
Failure to clean the coils increases pressure drops and therefore
reduces overall performance of the unit in terms of its flow rate.
It is recommended to mount RPB accessories to safeguard the coils:
protective coil grilles.
Frequency
Perform the general washing operations and verify the machine
Every 6 months
status; any points where corrosion is starting must be touched
up with protective paint.
The coils must be kept clear from any obstructions. If needed,
Variable,
they must be washed with detergents and water. Brush the fins
depending on
where the unit is gently to keep them from being damaged.
installed. Always use the personal protective equipment foreseen by law
(goggles, earmuffs, etc.).
The lubricating oil level in the compressor can be checked
Every 6 months
through the sight-glass.
Any fouling of the exchangers can be noted by measuring the
Every 12 months pressure drop between the inlet and outlet pipes, using a
differential pressure gauge.
It is mandatory to install a mesh filter on the unit's inlet water
Every 12 months
piping. This filter must be cleaned from time to time.
II.9.1.3 Checking the compressor oil level
The lubricating oil level in the compressor can be checked through the
sight-glass. The oil level in the sight-glass must be inspected while the
compressor is running.
At times, a small amount of oil could migrate towards the cooling circuit,
thereby causing slight level fluctuations; they can therefore be
considered normal.
Level fluctuations are also possible when capacity control is activated;
in any case, the oil level must always be visible through the sight-glass.
The presence of foam when the unit starts is normal. A prolonged and
excessive presence of foam during operation means that the refrigerant
has dissolved in the oil.
23
SECTION II: INSTALLATION AND MAINTENANCE
DANGER!
Always act on the general circuit breaker that
protects the entire system before performing any
maintenance, even if it is a simple inspection. Lock
the general circuit breaker in the zero position to
make sure that no one accidentally powers the
machine.
DANGER!
Pay attention to high temperatures near the
compressor heads and the supply pipes of the
refrigeration circuit.
Notes
IMPORTANT!
Do not use the unit if the oil level in the compressor
is low.