Gas Boiler Controls Wiring & Application Guide
2017-5-10u2002·u2002Gas Boiler Controls. Wiring & Application Guide. ... High Temperature Limit, Low Water Cut-Off protection, and Outdoor Air Reset. There's an IQ Option Card for each feature. Option Cards simply plug into the Option Panel, and feature a one or two wire connection to a sensor. Not available with the Series 2 boiler.
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