Charge Refrigerant - Trane TXUM524 Installation Operation & Maintenance

Air tightness test, vacuuming and adding refrigerant

Charge Refrigerant

Principle:
The outdoor unit has been fi lled with certain volume of refrigerant when it leaves the factory, but
it can't meet the volume required by the lengthened pipe. Therefore refrigerant must be added
additionally strictly in accordance with the actual length of the refrigerant pipe during site installation.
Operation procedures:
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•
Notes:
•
Refrigerant
filling tank
•
Charge volume Refrigerant
Upper charge limit Refrigerant
TX(U)M524/536
TX(U)M542/548
Note:
Prior to installation of indoor and outdoor units, please confi rm that the added R410A refrigerant
won't exceed the upper limit, otherwise the installation location should be chosen again.
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Shut off the compound pressure gauge, remove the vacuum pump, mount the fi lling tank well
and connect the gas tube. Exhaust the air, connect the joints of gas tube of the fi lling tank and
put the tank on the scale, with its mouth downward.
Set the volume to be fi lled on the electronic scale, open the valve of fi lling tank and compound
pressure gauge in turn, to fi ll the refrigerant into the system. After it reaches the certain amount,
shut off the valve of fi lling tank immediately, then remove the different connecting pipes.
During fi lling, the R410A refrigerant tank should be reversed (it is not necessary to reverse the
refrigerant tank with siphon), as shown in the following fi gure:
To indoor unit
Hose 2
Access valve
Hose 1
Hose 3
Compound
pressure gauge
Adding volume shall be determined according to length of the liquid pipe, see the following table
for details. But it is forbidden to exceed the upper fi lling value of the system.
Size of the liquid pipe
1/4"
3/8"
Model Outdoor unit charge volume
Air valve
Liquid valve
Outdoor unit
Refrigerant
filling tank
Charge volume Refrigerant
3.15 kg
4.2 kg
To indoor unit
Hose 2
Hose 3
Compound
pressure gauge
0.018 kg/m
0.053 kg/m
Upper refrigerant charge limit
5.5 kg
8.5 kg
Air valve
Liquid valve
Access valve
Hose 1
Outdoor unit
AMS-SVX01A-EN