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Appendix
Appendix
©Aqua-Hot®
400D Installation Manual
Rev 220504
©Aqua-Hot®
400D Installation Manual
Rev 220504
p. 53
p. 52
Measuring Antifreeze
Properly Apply Antifreeze to the Prism Assembly
Use the guide below to properly apply the propylene glycol
mixture to the prism assembly of the refractometer. Once that
is complete, peer through the eyeglass of the refractometer to
continue to the next step.
Adjust the Boundary Line
Once the glycol solution has been properly applied, adjust the
calibration screw until the boundary line labeled “Propylene
Glycol” is set to 32°F. The graphic to the right has been designed
as an aid, but note that it may differ from what is shown in the
refractometer sight glass.
Application of Propylene Glycol
Poor
Poor
Good
Application of Propylene Glycol
Boundary Line
Adjust to 32°F
Lower White Field
Upper Blue Field
Refractometer Sight Glass
Measuring Antifreeze Using a Refractometer
Eye Piece
Prism Assembly
Daylight Plate
Assembly
Calibration Screw
Parts & Accessories
NOTE:
Service parts and accessories are available through Aqua-Hot Factory Authorized Service Centers
. Click on the part number to direct you to the Aqua-Hot webstore to purchase.
Panel, Switch, 2-Position ASM
Room Thermostat, Positive Off
Boost Pump Harness
Bay Thermostat