EarthLinked SCW R-410A, Quick Start Instructions

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SCW-410-QS (05/12) Page 24
Figure 17. Primary Circuit with Compressor Unit Heat Exchanger
Final charging is done in the COOL mode as follows, with the charging set up described in
Figure 18:
1. Continue measuring the refrigerant charge weight as shown in Figure 18.
2. If the system is equipped with a domestic water module (DWM) or Desuperheater in
addition to the primary heating system, be sure the DWM switch is OFF and all water
modules are purged of air.
3. Be sure circulating water is to be maintained between 45°F and 65°F.
4. Close the HP valve. Then turn the system on in the COOL mode . The charging
process is detailed in the flow chart illustrated in Figure 21. When complete,
return to step 8 below.
5. Initiate final charging by opening the refrigerant container valve and the gage manifold
LP valve to allow liquid refrigerant to enter the system SLOWLY . The ACC will not
allow liquid refrigerant to enter the compressor.
6. Continue to add liquid refrigerant to the system until the bubbles disappear from the
in-line sight glass and the flow becomes clear, indicating full liquid flow .
7. When the liquid flow in the sight glass becomes clear, turn off the refrigerant container
valve. Charging is complete.
8. Document the total weight of refrigerant charge in the system. The system is now
ready for adjustment of the TXV.