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SCW-410-QS (05/12)
Page 23
7. Close the LP and HP valves on the gage block. Disconnect the vacuum pump
and the utility hose from the gage block. Isolate/protect the Digital Micron Gage
from the liquid Earth Loop Service Valve until the initial refrigerant charge is
complete.
8. Open the refrigerant container valve and
inject liquid refrigerant into the
charging port
as shown in Figure 15.
9. Charge with liquid refrigerant until
3 pounds
of refrigerant per ton of system
capacity, has entered the system.
Liquid entering the system at the charging port goes directly to the system earth
loops. It does not go to the compressor. Should the pressures equalize and
prevent the intended charge from entering completely, terminate the process of
initial charging. Note and document the amount of refrigerant.
10. When the initial refrigerant charge (see step 9 above) has entered the system,
close the refrigerant container valve and disconnect the refrigerant hose from the
charging port. Note and document the amount of refrigerant.
11. The system has now been initially charged. Disconnect the Digital Micron Gage.
Final Charge (Heat/Cool and Cool Only)
It is critical to control the conditions under which the compressor unit operates while final
charging the system.
Final charging must be done in COOL mode.
Hydronic Systems
If heating is provided by the SCW compressor unit as shown in Figure 16, the
circulating water in the primary circuit (see Figure 17) for the hydronic system is to
be maintained in the 45°F to 65°F range.
Water from the main supply can be flushed
through the primary circuit to maintain this water temperature range while final charging
the compressor unit.
Item
Comp.
Unit
Air
Htg.
Hydronic
Htg.
Air
Clg
Domestic
Wtr. Htg.
System Functions
1.
SCW
Yes
1
Yes
1
Radiant panel hydronic heating and air cooling (chilled water
handler)
1
Has internal refrigerant/water heat exchanger. Requires field supplied water circulating pump.
Figure 16. SCW Hydronic Heating/Cooling System
Summary of Contents for SCW Series
Page 8: ...SCW 410 QS 05 12 Page 8...
Page 9: ...SCW 410 QS 05 12 Page 9 Figure 5 SCW Connections for R 410A...
Page 10: ...SCW 410 QS 05 12 Page 10 Figure 6 SCW Internal Flow Schematic...
Page 11: ...SCW 410 QS 05 12 Page 11 Figure 7 SCW Piping...
Page 15: ...SCW 410 QS 05 12 Page 15 Figure 10 SCW Electrical Ladder Diagram 230 1 60...
Page 16: ...SCW 410 QS 05 12 Page 16 Figure 11 SCW Electrical Schematic 230 1 60...
Page 17: ...SCW 410 QS 05 12 Page 17 Figure 12 SCW Series 230 3 60 Electrical Ladder Diagram...
Page 18: ...SCW 410 QS 05 12 Page 18 Figure 13 SCW Series 230 3 60 Electrical Schematic...
Page 19: ...SCW 410 QS 05 12 Page 19 Figure 14 Part 1 of 2 SCW Field Wiring Diagram Reference Figure 8...
Page 20: ...SCW 410 QS 05 12 Page 20 Figure 14 Part 2 of 2 SCW Field Wiring Diagram Reference Figure 9...
Page 28: ...SCW 410 QS 05 12 Page 28 Figure 21 Charging and Superheat Adjustment Process...