The UL Class 2 rating simplifies compliance with NEC requirements for low-voltage power sources

such as the switch from cooling to heating mode in heat pump applications

Maintaining a clear and functional trap is essential to prevent standing water

It is a direct cross-reference for Honeywell Q340A and Johnson Controls K19 series

This 24V HVAC transformer provides the standard power requirements for most smart thermostats

Armstrong Furnace R43110-002 Ignition Module Els PW 17895 The UL Class 2 ratingThe Armstrong Furnace R43110 002 Ignition Module (manufactured by Fenwal, model 35 615900 227) is a critical automatic ignition system designed for high reliability sequence control in residential and commercial furnaces. This 24 VAC ignition control board manages the direct spark ignition (DSI) process, featuring a precise 30 second pre purge, 15 second ignition period, and 30 second inter purge to ensure safe and efficient combustion. Engineered to