02
INST
ALLA
TION
27
English
Performing leak tests
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating the vacuum and
recirculating the R-410A, it’s responsable of installer to pressurize the whole
system with nitrogen (using a cylinder with pressure reducer) at a pressure
above 40 bar (gauge).
LEAK TEST WITH R-410A (after opening valves)
Before opening valves, discharge all the nitrogen into the system and create vacuum. After
opening valves check leaks using a leak detector for refrigerant R-410A.
Once you have completed all the connections, check for possible leaks using
leak detector specifically designed for HFC refrigerants.
B(Liquid)
A(Gas)
❋
The designs and shape are subject to
change according to the model.
To check for gas leaks on the Outdoor unit, check the valves on section
A and B with a leak detector.
Connecting the drain hose to the outdoor unit
1. Make space more than 80 mm between the bottom of the outdoor unit and the ground for installation of the drain hose,
as shown in figure.
2. Insert the drain plug into the hole on the underside of the outdoor unit.
3. Connect the drain hose to the drain plug.
4. Ensure that the drained water runs off correctly and safely.
‘B’ mm
13
mm
80 mm
5. Be sure to plug the rest of drain holes not connected with drain plugs using drain caps.
DRAIN CAP(3EA)
DRAIN PLUG(1EA)
❋
When installing the product, make sure that the rack is not placed under the drain hole.
❋
If the product is installed in a region of heavy snow, allow enough separation distance between the product and the
ground.
Summary of Contents for AC-505CM Series
Page 38: ......
