Enerblue PURPLE, User And Maintenance Manual

USER and 

MAINTENANCE 

MANUAL

14

7.3  GENERAL RECOMMENDATIONS FOR HYDRAULIC CONNECTIONS

When setting up the hydraulic circuit for the evaporator, it is good practice to comply with the following 
prescriptions and in any case with the national and local regulations (refer to the layouts included in the 
manual)�
fit the piping to the chiller using flexible joints in order to prevent transmission of the vibrations and 
compensate heat dilation� (Proceed on the pumps unit in the same way)�
Install the following components on the piping:

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stop cocks, temperature and pressure indicators for routing maintenance and unit inspection�

>

sample points on the input and output pipes to read the temperature, if temperature indicators are 
not present�

>

shut-off valves (gate valves) to isolate the unit from the hydraulic circuit�

>

metal mesh filter with openings not wider than 1 mm, on the exchanger inlet pipe to protect the 
exchanger against slag or impurities in the pipes�

>

vent valves, to locate in the highest parts of the hydraulic circuit, in order to allow to bleed the 
noncondensables�

>

expansion tank and automatic charging valve for maintenance of the system pressure and to compen-
sate heat dilation�

>

drain valve and where necessary, drain tank to empty the system for maintenance operations or sea-
sonal breaks�

It is mandatory to comply with these prescriptions to facilitate the 
hydraulic connection operations, maintenance and access to the 
electrical panel.

It is highly recommended to install a safety valve on the hydraulic circuit. 
If serious anomalies should arise in the system (e.g. a fire breaks out), 
this allows the system to be drained, thereby preventing any explosion. 
Always connect the drain to a pipe with a diameter that is no less than 
that of the valve opening and direct it towards the areas where the jet 
cannot harm anyone.

It is mandatory to install the flow meter supplied with the unit in line 
with the chilled water outlet connection.

It is obligatory to assemble the metal mesh filter on the water inlet pipe. 
If any of the above are missing, the warranty is cancelled immediately.

It is highly recommended to install a safety valve on the hydraulic 
circuit. In the event of serious anomalies in the system (e.g. fire) 
it allows to drain the system, thus preventing any explosions.  
Always connect the drain to a pipe with a diameter that is no less than 
that of the valve opening and direct it towards the areas where the jet 
cannot harm anyone.