Aqua-Hot 375-LP, Руководство по установке

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© 2011 Aqua - Hot
®
375 - LP Installation Manual
Warning
1.
Use extreme caution in gathering your antifreeze sample. When draining the Aqua-Hot heating system. ex-
tremely hot liquid may be in the Boiler Tank and could cause personal injury.
NOTE: Refractometers may have more than one scale. Make sure you are reading the scale marked “Propylene”
for measuring the antifreeze solution in the Aqua-Hot system.
Basic Operation
1. Open daylight plate, and place 2
-3 drops of the sample on the
main prism. Close the daylight
plate so the liquid sample spreads
across the entire surface of the
prism without air bubbles or dry
spots. Allow the sample to rest on
the prism for approximately 30
seconds before going to step #2.
(This allows the sample to adjust
to the ambient temperature of the
refractometer).
2. Hold daylight plate in the direction
of a light source and look into the eye-
piece. You will see a circular field with
graduations down the center (you may
have to focus the eyepiece to clearly see
the graduations). The upper portion of
the filed should be blue, while the lower
portion should be white.
3. Take the reading where the
boundary line of blue and white
cross the graduated scale. The
scale will provide a reading of the
freezing point of antifreeze solu-
tion and the propylene glycol con-
centration. Clean the prism care-
fully using a damp soft cloth. Do
NOT immerse in water.
U
SING THE REFRACTOMETER TO TEST ANTIFREEZE SAMPLE
A
PPENDIX
F: M
EASURING
P
ROPYLENE
G
LYCOL
U
SING A
R
EFRACTOMETER