Trane 4TXK6512G1000AA, Service Manual

Page: 140 / 187

Caution
When charging a system, care shall be taken that its maximum permissible charge is never exceeded, in view of
the danger of liquid hammer.
Warning

Refrigerant cylinders shall be opened shlowly.

Always use protective gloves and protect your eyes when charging refrigerant.
Danger

When the power is on, please close the front
panel when leaving the unit unattended. Charging with an unsuitable substance may cause explosions and
accidents, so always ensuren that the appropriate refrigerant (R410A) is charged.

This unit requires additional charging of refrigerant according to the length of refrigerant piping connected at the
site .

Make sure to charge the refrigerant in liquid state to the liquid pipe . Since R410A is a mixed refrigerant, its
composition changes if charged in its gaseous state and normal system operation would then no longer be
assured .

Before charging, check whether the refrigerant cylinder has a suphon attached or not and position the cylinder
accordingly .
Fill using a cylinder with a
siphon attached Charge
the liquid refrigerant with
the cylinder in upright
position .
Fill using a cylinder with
a siphon attached Charge
the liquid refrigerant with
the cylinder in up-side-
down position .
On this model it is not necessary to charge additionally if the piping length ≤30m .
Complete recharging
Notice
Berore recharging, make sure to execute vacuum drying
of the intermal piping of the unit as well. To do so, use the internal service port of the unit. Do not use the service
ports located on the stop valve, since vacuum drying can not be performed properly from these ports.
Outdoor units have 1 port on the piping. It is between the heat exchanger and the 4-way valve.
In case complete recharging is required (after a leak, etc .), refer to teh information below to determine the
necessary amount of refrigerant .
1 1 3