38VYM
R-410A
GB - 8
Three-way valve
Needle valve
Valve cap
Valve needle
Two-way valve
Allen (hex. head) wrench
Gas line (large diameter)
Liquid line (small diameter)
Service connection
Indoor unit
Outdoor unit
Vacuum pump
Air purging
USE ONLY A VACUUM PUMP TO PURGE AIR FROM THE PIPING.
The air purging procedure must be performed for each of the
indoor units.
NEVER use the system compressor as a vacuum pump.
NEVER use the unit refrigerant gas to purge the connecting
pipes.
No additional refrigerant has been provided in the unit for this
purpose.
Remove the caps from the two and three-way valves.
Create a vacuum with a vacuum pump connected to the service
connection of the suction shut-off valve, as shown, keeping the
shut-off valves completely shut until a 50 Pa (0.5 mbar) vacuum
has been reached.
Now open the two-way valve for 3 sec., then quickly shut it to check
for possible leaks.
After the leak check, fully open the two and three-way valves.
Replace caps and check for leaks.
Once all connections have been completed, check for leaks by
using a leak detector designed for HFC refrigerants.
Finally wrap the valves and pipes with anti-condensate insulation
and tighten this with tape, without exerting too much pressure on
the insulation.
Repair and cover any possible cracks in the insulation.
Fix the pipes to the wall with hooks or conduits.
Refrigerant connections
Pipe
Pipe insulation
Fastening tape