3  Piping work and 
refrigerant charge
117
3
SMGB0077 rev.0 - 01/2013
NOTE
When installing the pipes, leave enough space for maintenance work in the electrical box of the unit.
  
Drain pipe installation
For condense draining, prepare a polyvinyl chloride pipe with a Ø25mm (outer diameter).
Fasten the eld supplied pipe to the drain hose with adhesive.
The drain piping should be perfomed with a down-slope pitch of 1/25 to 1/100.
Connect a syphon, as shown at the gure below.
>75 mm
Slope 2%
Plug
NOTE
Keep Electrical Box and Drain Pipe connection free of refrigerant pipes.
C A U T I O N
It is very important the syphon installation in order to guarantee the proper condensate draining.
NOTE
If  the  relative  humidity  of  the  inlet  air  or  the  ambient  air 
exceeds 80% in the place where the unit is installed, t an
auxiliarydrainpan(eld-supplied)belowtheindoorunit,as
indicatedinthegure.
 
Indoor unit
Auxiliary drain pan
(field-supplied)