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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
Operates on a standard 24VAC control circuit
it is a direct drop-in replacement for the 621891R
providing technicians with precise control for draining expansion tanks or isolating liquid level gauges
supporting both standing pilot and intermittent pilot ignition setups
the JD-2-PURPLE is designed to handle differential
Williams 9940 Converter 322056-301 Operates on a standard 24VACThe Williams 9940 Hard Wire Converter is a critical component for integrating modern electronic thermostats with older 24V furnace systems that lack a dedicated C wire. This HVAC power interface converts 115V line voltage into the 24V supply necessary to power digital controls, ensuring stable operation without battery drain. Designed specifically for compatibility with Williams furnace models and wall heaters, this 10VA rated converter facilitates a