CLIVET WSAN-XPR 21, Installation And Use Manual

M0G940E8-00 04/07/08 

pag 

43 

MAINTENANCE INSPECTIONS 

Foresee inspection assistance carried out by authorized 
centers or by qualified personnel.  
The inspections should be carried out at least:  

• 

- Every year for only the cooling units  

• 

- Every six months for the cooling and warming 
units   

The frequency, however, depends on the use: in the event 
of frequent use (continuous or very intermittent use, near 
the operating limits, etc) or critical use (service necessary) 
it is recommended to plan inspections at close intervals. 
The inspections to be performed are as follows:  

• 

verify the power supply tension (when emptied or filled)  

• 

inspect the electrical board (status of solenoid starter 
contacts, terminal closings, the status of wiring and 
relevant insulations)  

• 

inspect the absorption of the single electrical loads  

• 

verify the cleaning and the efficiency of the exchangers  

• 

inspect the cleaning of the filters (air/water)  

• 

verify the leakage from the refrigerating circuit 

• 

Verify the protection devices (safety valves, pressure 
switches, thermostats, etc.), the adjustment systems, 
the control devices (alarm signalizations, probes, 
manometers, etc)  

• 

check the operating parameters of the refrigerating 
circuit (see the following REFRIGERANT TABLES and 
the START-UP section)  

 
For units equipped with safety valves, follow the 
Manufacturer’s instructions. 
Verify periodically the cleaning of the safety valves and 
that oxidative / corrosive phenomena are not present, in 
particular for installations near the sea, in industrial areas 
or in rooms with a corrosive atmosphere.  

97/23 CE PED DIRECTIVE  

97/23 CE PED DIRECTIVE gives instructions for installers, 
users and maintenance technicians as well. Refer to local 
actuation norms. 
In Italy, refer to the Ministerial Decree of 1

st

 December 

2004 no. 329 (and following modifications) which defines 
the performances to be executed; the units of 

1

st

 category 

and those defined by the art. 3.3 97/23/EC are not 
included in this regulation (see the serial number plate on 
the unit) . 
 
 

Briefly and as an example, see the following :  

1.  COMPULSORY VERIFICATION OF THE FIRST 

INSTALLATION only for units assembled on the 
installer’s building site (for ex. Condensing c 
direct expansion unit) 

2.  CERTIFICATION OF SETTING IN SERVICE  for all 

the units  

3.  PERIODICAL VERIFICATIONS to be executed with 

the frequency indicated by the Manufacturer (see the 
MAINTENANCE INSPECTIONS  paragraph) 

PUT AT REST 

If a long period of inactivity is foreseen, for example the 
winter for the cooling unit, the following is recommended:  

• 

to turn the power off in order to avoid electrical risks or 
damages by lightning strike  

• 

to avoid the risk of frosts as shown in the HYDRAULIC 
CONNECTIONS section, and, in particular 

- to empty or add glycole in the plant sections 
subjected to temperatures below zero 
- to empty or add glycole in the water heating coils, 
also in summer  
- to power antifreeze heaters if present  

If the period of inactivity is particularly long or in the event 
of extremely low temperatures, the external fans can be 
blocked temporarily; therefore, it is recommended to switch 
them on every month in order to avoid seizures or 
electrical overloads when the unit will be switched on.  
The restarting of the unit has to be carried out by qualified 
personnel, in particular, after the winter break for cooling 
units or when seasonal switching should be performed.  
When restarting, refer to the SWITCHING ON  section. 
Schedule technical assistance in advance to avoid hitches 
and be able to use the installation when necessary.