106636-02 - 12/19
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X-2
Installation, Operating & Service Manual
Appendix:
Low Return Water Temperatures
(continued)
Primary-Secondary Pumping:
Best Alternative
: U.S. Boiler offers a system by-pass kit [part number 107795-01] that addresses these situations.
A strap on temperature sensor measures boiler inlet temperatures. This temperature signal is sent to a variable
speed pump that will ensure boiler inlet temperatures are always greater than the factory by-pass kit set point of
120oF.
Kit includes all fittings, pump, sensor and instructions.
This is an improvement over simple by-pass
piping to reduce condensation. Again this is a
fixed system. It can not adapt to variations in
temperature and flow.
