CLIVET WSAN-XPR 21, Installation And Use Manual

M0G940E8-00 04/07/08 

pag 

32 

START-UP 

ALL THE EQUIPMENT MUST BE COMMISSIONED BY AUTHORISED SERVICE CENTRES. 

THIS SERVICE IS LIMITED TO START-UP OF THE UNIT ONLY AND NOT THE CONNECTIONS OR INSTALLATION OF 

THE SYSTEM. 

ONLY QUALIFIED TECHNICIANS MUST PERFORM THE FOLLOWING OPERATIONS. 

PRELIMINARY CHECKS  

Before checking, please verify the following  
1.  the unit should be installed properly and in conformity 

with this manual. 

2.  the electrical power supply line should be sectioned at 

the beginning. 

3.  the sectioning device is locked and the proper warning 

“not to operate” sign is placed on the handle.  

4.  make sure no tension is present  
5.  the coils must be clean and free of obstacles  
6.  the ventilators must be free of leaves, cardboard, fixed 

obstacles (beams, barriers, etc.), snow, etc  

7.  the external ventilators must not be blocked  

The external ventilators can be subject to a temporary 
block, especially if the inactivity period before the first 
start-up was quite long or if external temperature is very 
low. It is also possible to unblock them manually (ONLY 
WHEN THE UNIT IS UNPLUGGED – RISK OF 
INJURES) so that jams or electric overloads are 
avoided when the unit is restarted.  

REFRIGERANT SYSTEM 

Carefully check the refrigerating circuit: the presence of oil 
stains can mean leakage caused by transportation, 
movements or other). 
Open the cocks of the refrigerator circuit, if there are any. 
Using the unit manometers, if present, or service 
manometers, verify that the refrigerating circuit is in 
pressure. 
Make sure that all the service outlets are closed with proper 
caps; if caps are not present a leak of refrigerant can be 
possible.

WATER SYSTEM 

Ensure that the plumbing system has been washed. Drain 
the wash water before connecting the unit to the system. 
Check that the water circuit has been filled and pressurised. 
Accertarsi che non siano presenti perdite . 
Check that the shut-off valves in the circuit are in the 
"OPEN" position.  
Check that there is no air in the circuit. If required, bleed it 
using the vent valves in the system. 
When using antifreeze solutions, make sure the glycol 
percentage is suitable for the type of use envisaged.  
% weight of ethylene 
glycol 

10 % 

20 % 

30 % 

40 % 

Freezing point 

- 4 °C 

- 9 °C 

- 15 °C  - 23 °C 

Safety temperature 

- 2 °C 

- 7 °C 

- 13 °C  - 21 °C 

 
Check that the circulator pumps are not blocked. In fact, 
their motor shaft may seize up, especially after long 
shutdowns. Unblocking can be accomplished with a 
screwdriver using the purge hole.  

ELECTRICAL SYSTEM 

Check the proper tightening of the screws that fix the 
conductors to the electrical components in the board 
(during handling and transportation, the vibrations could 
have loosened them). 
Verify that the unit is connected to the ground plant.  
Control that all panels and protection devices of the unit are 
repositioned and blocked. 
Charge the unit by closing the sectioning device, but leave 
it on OFF. 
Make sure that the tension and net frequency values are 
within the limit of: 
230 +/- 6% single phase unit; 400/3/50 +/- 6% three-phase 
unit 
Control the unbalancing of the phases: it must be lower 
than 2% . 
Example:  
L1 - L2 = 388 V,    L2 - L3 = 379 V,   L3 - L1 = 377 V   
average of the measured values = (388+379+377)/3 = 381 
maximum deviation from the average = 388-381= 7V 
Unbalancing = (7/381) x 100 = 1.83%  = ACCEPTABLE 
Operating out of the indicated limits causes the loss of the 
guarantee as well as very serious damages.  
 

IF THE CRANKCASE HEATERS ARE FITTED 

when the unit is started up for the first time and following all 
prolonged periods of inactivity is OBLIGATORY to connect 
the oil heaters on the compressor crankcase at least 8 
hours before the compressor is to be starter. 
BEFORE POWERING THE HEATERS, OPEN THE 
COMPRESSORS COCKS, IF PRESENT. 
To supply the heaters is necessary to switch off the isolator 
switch on the unit. 
To make sure  that hte heaters are working, check the 
power input with amperometic pliers. 
At start-up the compressor cranckase temperature on the 
lower side must be higher at least of  10°C than the 
external temperature. 
DO NOT START THE COMPRESSOR WITH THE 
CRANKCASE OIL BELOW OPERATING TEMPERATURE.