Publicidad
Idiomas disponibles
Idiomas disponibles
Cleaning fans
DANGER!
Pay attention to the fans. Do not remove the protective grids for any reason whatsoever!
DANGER!
Always act on the general automatic switch protecting the system before carrying out any maintenance work, even if it is purely for
inspection purposes. Make sure that no one accidentally supplies power to the machine; lock the general automatic switch iin the
zero position.
Check the fan grids monthly making sure they are not obstructed by any objects and/or filth. The latter, besides drastically reducing the overall perfor-
mance of the unit, in some cases causes the fans to break.
Checking compressor oil level
IMPORTANT!
Do not use the unit if the oil level in the compressor is low.
The units are equipped with oil sight glasses on the compressor. The lubricating oil level in the compressor can be checked by means of the sight-glass.
The oil level in the sight-glass can be inspected while the compressor is running. At times a small amount of oil could migrate towards the cooling circuit
causing slight level fluctuations; they can therefore be considered normal. Level fluctuations are also possible when capacity control is activated; in any
event, the oil level must always be visible between the minimum and maximum level sight-glass. During the first hours of operation, frequently check the
level to ensure it is between the two sight-glasses. The presence of foam when the unit starts is normal. A prolonged and excessive presence of foam
during operation, on the other hand, means that the refrigerant has not dissolved in the oil.
Inspecting and washing the heat exchangers
DANGER!
The acids used for washing the heat exchangers are toxic. Use suitable personal protective equipment.
IMPORTANT!
Use only chemical detergents suitable for cleaning the exchangers. Unsuitable chemical detergents can corrode the exchanger dam-
aging it irreparably.
Exchangers, with the passage of time, are subject to fouling even under nominal conditions of use. The working temperatures of the unit, the speed of the
water in the pipes and the suitable finish of the heat exchanging surface reduce fouling of the exchangers to a minimum. Any incrustation of the exchanger
may be detected by measuring the pressure-drop between the inlet and outlet pipes, using a differential pressure gauge. Any sludge that may form in the
water circuit or any silt that cannot be trapped by the filter, as well as extremely hard water conditions or high concentrations of any antifreeze solution
used, may clog the exchangers and undermine their heat exchanging efficiency. In this case, it is necessary to wash the heat exchanger with suitable
chemical detergents. Provide already existing systems with adequate charge and discharge connections. The liquid detergent must circulate around the
exchanger at a flow rate at least 1.5 times higher than the rated working flow rate (without exceeding the maximum admitted flow: see "Operating limits").
The first detergent cycle cleans up the worst of the dirt, after the first cycle, carry out another cycle with clean detergent to complete the operation.
Before starting up the system again, rinse abundantly with water to get rid of any traces of acid and bleed any air from the system; if necessary start up
the service pump.
IOM_EQRU-SS_EQRHU-SS_2160a4350_208676_230601_ES-EN-FR-DE-IT
99
Evaporator
1
Acid solution tank
2
Shut-off gate valve
3
Auxiliary cock
4
Wash pump
5
Auxiliary filter
6
User
7
EQRU-EQRUSS
EQRHU-EQRHUSS
Publicidad
