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Common Questions Is this part compatible with non-condensing furnaces
Normally Open Operation: Ensures failsafe circulation or specific system bypass logic during power loss
An excessive draft setting will cause high stack temperatures and reduced efficiency
the 5D51-78 includes a removable solid copper jumper between the fan and limit circuits
Will this switch replace a dual-port vacuum sensor
McDonnell & Miller 342300 Strainer Assembly and Gasket 30067439-890 Common Questions Is this partThe McDonnell & Miller 342300 Strainer Assembly and Gasket (Model SA51 9R) is a high performance filtration component engineered specifically for 25A Series make up water feeders, as well as the 21 and 221 Series. In commercial steam and hydronic systems, maintaining water quality is critical to preventing valve seat fouling. This assembly features a robust strainer basket capable of removing particulates as small as 100 microns, protecting the
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