SC-410-QS (05/11)
Page 30
The final charging procedure is as follows, with the charging set up described in Figure 25:
1. Continue measuring the refrigerant charge weight as shown in Figures 25.
2. If the system is equipped with a domestic water module (DWM) in addition to the
primary (air handler or hydronic) heating system, be sure the DWM switch is OFF.
3. Be sure that air entering the air handler is between 70°F and 80°F. If the system is a
hydronic primary circuit, circulating water is to be maintained between 45°F and 65°F.
4. Close the HP valve. Then turn the system on in the HEAT mode.
5. Initiate final charging by opening the refrigerant container valve and the gage manifold
LP valve to allow liquid refrigerant to enter the system as shown in Figure 25. The
ACC will not allow liquid refrigerant to enter the compressor.
6. Adding liquid refrigerant will raise the liquid level in the ACC. Continue to add liquid
refrigerant to the system until the liquid level has reached the middle sight glass, as
shown in Figure 26.
7.
When the liquid level is at the middle sight glass, as shown in Figure 26, turn off
the refrigerant container valve. The system is fully charged.
8. When the system has run for 3 minutes with a full refrigerant charge, read the
evaporating temperature and condensing temperature.
The evaporating temperature can be read by attaching a thermocouple lead to the
compressor suction inlet with electrical tape, then wrapped with ½” thick insulation.
The condensing temperature can be read by attaching a thermocouple lead to the
earth loop liquid line coming into the compressor unit with electrical tape, then
wrapped with ½” thick insulation. Use an accurate temperature indicator.
In Figure 26a, locate the evaporating temperature on the horizontal axis. The
corresponding condensing temperature reading should fall between the upper and
lower parallel lines in Figure 26a.
The temperature profile in Figure 26a is valid for the air handler systems with an
air flow of 400CFM per Ton.
If condensing temperature is above the acceptable
range, the air flow is low. If condensing temperature is below the acceptable range, air
flow is too high.
9. Check the suction saturation temperature to verify that it is within ±3°F for the
measured suction pressure. The suction temperature should be approximately 15 to
20°F lower than the local earth temperature.
Summary of Contents for SC Series
Page 7: ...SC 410 QS 05 11 Page 7...
Page 8: ...SC 410 QS 05 11 Page 8 Figure 5 SC Connections for R 410A...
Page 9: ...SC 410 QS 05 11 Page 9 Figure 6 SC Internal Flow Schematic...
Page 10: ...SC 410 QS 05 11 Page 10 Figure 7 SC Piping...
Page 11: ...SC 410 QS 05 11 Page 11 Figure 8a SC Air Heating and Cooling...
Page 15: ...SC 410 QS 05 11 Page 15 Figure 11 SC Electrical Ladder Diagram 230 1 60...
Page 16: ...SC 410 QS 05 11 Page 16 Figure 12 SC Electrical Schematic 230 1 60...
Page 17: ...SC 410 QS 05 11 Page 17 Figure 13 SC Series 230 3 60 Electrical Ladder Diagram...
Page 18: ...SC 410 QS 05 11 Page 18 Figure 14 SC Series 230 3 60 Electrical Schematic...
Page 19: ...SC 410 QS 05 11 Page 19 Figure 15 SC Series 460 3 60 Electrical Ladder Diagram...
Page 20: ...SC 410 QS 05 11 Page 20 Figure 16 SC Series 460 3 60 Electrical Schematic...
Page 21: ...SC 410 QS 05 11 Page 21 Figure 17 SC Series 575 3 60 Electrical Ladder Diagram...
Page 22: ...SC 410 QS 05 11 Page 22 Figure 18 SC Series 575 3 60 Electrical Schematic...
Page 23: ...SC 410 QS 05 11 Page 23 Figure 19 Part 1 of 2 SC Field Wiring Diagram...
Page 24: ...SC 410 QS 05 11 Page 24 Figure 19 Part 2 of 2 SC Field Wiring Diagram...
Page 35: ...SC 410 QS 05 11 Page 35 Figure 30 CAV Adjustment Process Flow Chart...