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the HC21ZS122 is a shaded-pole or permanent split capacitor design (depending on the specific production run) that typically does not require an external capacitor
When installing
Field Reliability: Designed as an OEM pressure switch
Can this switch be used on the suction side for low-pressure cutout
Raypak 008171F Pressure Switch Els PW 17895 the HC21ZS122 is a shaded-poleFor veteran technicians and boiler contractors, the Raypak 008171F Pressure Switch is the direct OEM replacement engineered for high demand diagnostic air proving. This Normally Open (N O) blower pressure switch is calibrated to a precise 1. 10" WC setpoint, ensuring the combustion blower generates sufficient static pressure before the ignition sequence initiates. Constructed with robust industrial grade materialsincluding a brass housing, Buna N
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