Section 7, Plumbing the System
International Thermal Research 7-3
Do not operate the Oasis SCH33 Heating System until a proper anti-
freeze (heat transfer fluid) solution has been added to the heating
system and all trapped air has been bled. An inadequate mixture
may cause system circulation problems and potential heating system
damage and/or personal injury. Use only a non-toxic, propylene
glycol-based coolant with additives recognized as safe “GRAS” by the
FDA. Refer to the anti-freeze manufacturer recommendations for
instructions for your application.
6. Ensure that the coolant flow is adequate through the Oasis SCH33
Heating System. The flow rate through the space heating loop should
be at least 2.5 GPM. A large temperature difference between each
subsequent fan in the space heating loop (when the Oasis SCH33 is
running and up to normal operating temperature) is an indication of
inadequate flow. In a properly flowing system, each fan in the space
heating loop will have an outlet temperature that is only a few
degrees cooler than the preceding fan. The temperature difference
will be larger if the fan has a higher BTU output.
7. The Oasis SCH33 should be filled and flushed prior to operation to
remove any foreign debris.
8. Slip-on foam insulation coverings may be used over the hose fittings
to reduce heat loss.
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