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SCW-410-QS (05/12)
Page 13
Antifreeze Protection
When
SCW compressor units
are applied to radiant panel hydronic heating and/or chilled water
cooling systems, the water circulating system must be protected from potential damage due to
freeze-up by utilizing an adequate antifreeze solution. The antifreeze protection is provided by the
installer prior to the EarthLinked
®
system start-up.
Propylene-glycol antifreeze solution with an inhibitor is the type of antifreeze solution required for
Earthlinked
®
products utilized in radiant panel hydronic heating and/or chilled water cooling
systems. These systems shall be freeze protected consistent with the application -specific
minimum temperature, as shown in the table below. Propylene-glycol antifreeze solutions should
always be in the range of 20% to 50% by volume, as indicated in the table.
TEMPERATURE, °F
PROPYLENE GLYCOL, %
WATER SOLUTION
MULTIPLIER FACTOR (WSMF)
18
20
x 1.03
8
30
x 1.07
-7
40
x 1.11
-29
50
x 1.16
Propylene Glycol Freeze Protection Table
Propylene-glycol can be purchased in the straight form and mixed with an inhibitor prior to filling
the system, or it can be purchased as inhibited propylene-glycol. The following are examples of
manufacturers for the above:
Straight propylene-glycol: Chemical Specialties, Inc. (
Inhibitor: Nu-Calgon Products, Ty-lon B20 (
Inhibited propylene-glycol: Houghton Chemical Corp., SAFE-T-THERM
®
,
www.houghton.com/fluids/safe-t-therm/index.html
Summary of Contents for SCW R-410A
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...