COMPONENTS
Internal Bypass Valve
The Automatic Bypass Assembly allows the heater to be
connected to a wide variety of pumps.
With every job site having different flow rates, the Bypass
automatically adjusts to provide the proper flow rate to
the heater, up to 100GPM max. If the flow rate exceeds
100GPM condensation may form and erosion of the
copper tubes may occur. It is then recommended that an
external bypass be installed before the heater.
If the heater is making a knocking noise or cycling
the high limits, it may be that the Bypass is missing,
stuck open or damaged. It is also possible that the
wrong Bypass spring is installed. See table for correct
bypass spring assignment.
Model
264
404
Spring Color
Orange
Blue
Part Number
019054F
019056F
Tech Tip: You can feel the Bypass by
placing your fingers down into the inlet
of the header. You can feel the Bypass
spring back as you push on it.
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