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Maintenance and Service
Refrigerant Field Charge Procedure
Refrigerant Field Charge to an Undercharged Unit
Refrigerant Recycling
RTXC-SVX003D-EN
Once the system is deemed leak and moisture free, following the procedures to add refrigerant
charge. Refer to
Figure 1. Unit Nameplate
1.
Unit is empty of all refrigerant and under vacuum.
2.
Attach charge hose to evaporator service valve and exclude the air in hose by refrigerant
prior to open the service valve.
3.
Add charge to the evaporator according to the refrigerant type and amount indicated in the
unit nameplate.
4.
Close the service valve and remove the charge hose after charge.
Equipment Damage!
Constant water flow within allowed range through the evaporator is strictly necessary during
the whole charge process to prevent evaporator from freezing damage.
Equipment Damage!
Ensure that the oil sump heaters have been operating for a minimum of 12 hours before
starting and power of evaporator heater and pump always on. Failure to do so may result in
equipment damage.
This procedure should be followed when adding refrigerant to an undercharged unit.
1.
Once the system is deemed shortage, refer to
service valve of suction side of the unit with the R134a/R513A tank.
2.
Open the valve of refrigerant tank to evacuate the air in the charging hose.
3.
Add no more than 4.5kg gas refrigerant into the circuit during compressor operation.
4.
After the unit has operated for approximately 30 minutes and the system has stabilized,
check the subcooling and approach temperature. Repeat from Step 3 till subcooling or
approach temperature back to normal.
5.
Close the service valve and remove the hose.
Insufficient Subcooling!
Proper subcooling can be determined by operator log, service technician experience or
consulting Trane local service.
Gas Refrigerant Adding!
Add gas refrigerant only during operation to avoid compressor failure.
Refrigerant used in any type of air-conditioning or refrigerating equipment should be recovered
and/or recycled for reuse, reprocessed (reclaimed). Recover the system refrigerant charge should
use certified recycling equipment and approved storage containers for recycled refrigerant follow
proper procedure. Never release refrigerant into the atmosphere or discharge refrigerant into the
container by compressor operation of the unit.
for refrigerant charge information.
CAUTION
NOTICE
Figure
17, loosely attach charge hose to the
NOTICE
NOTICE
55
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