Check Frost Protection Temperature Of Heat Transfer Medium; Check Ph Of Heat Transfer Medium - Viessmann Vitosol 100-FM SV1F Installation, Operating And Service Instructions

Vitosol 100-FM/200-FM Installation, Operating and Service

Check Frost Protection Temperature of Heat Transfer Medium

Check pH of Heat Transfer Medium

Tyfocor HTL should be between 45-50% propylene
glycol. See below or for more details, refer to the product
MSDS information on Tyfocor.
CAUTION
In areas with extremely cold climate conditions, where
outdoor temperatures may drop below -31°F (-35°C),
the use of Tyfocor-HTL is not recommended.
Use a solar propylene glycol mixture with a higher
concentration of glycol that provides the level of freeze
protection required for the area of the collector
installation.
Check the freezing point of Tyfocor HTL heat transfer
medium with a Viessmann glycol hydrometer tester or
approved alternate refractometer.
CAUTION
Never mix Tyfocor HTL with water or alternate heat
transfer fluid.
CAUTION
Failure to test frost protection temperature of solar fluid
can lead to freezing and damage to collector.
The Tyfocor heat transfer medium supplied is a liquid
based on 1.2 - propylene glycol with a frost protection
limit of -31°F (-35°C). Below this temperature the fluid
is no longer pumpable.
The heat transfer fluid can be damaged if exposed to long
periods of stagnation. The pH level of the fluid is
the indicator of the fluids suitability for continued use.
The pH value should be in the range of 7.5 - 8.5.
This must be tested annually.
If the pH value falls below 7.5, the heat transfer fluid
must be drained, flushed and refilled with the new fluid.
CAUTION
Failure to test pH and replace solar fluid as required can
lead to corrosion and fouling of collector circuit.
Maintenance
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