초록 ▼

A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff sensor. The feed timer supplies water t

A water feeder controller for a boiler monitors a low water cutoff sensor in a boiler and uses a feed timer to feed water to the boiler for a predetermined feed period of time. The feed timer brings the water level in the boiler well above the low water cutoff sensor. The feed timer supplies water to the boiler only if the low water cutoff sensor continues to indicate a low water level for a delay period of time measured by a delay timer. A resettable display indicates the quantity of water supplied by the water feeder to the boiler based on a feed counter incremented during water feeding. A manual feed button allows water to be manually fed to the boiler. The quantity of water manually supplied to the boiler is also shown on the display. The feed timer and delay timer are preferably implemented in software in a microcontroller in the water feeder controller. A lockout loop in the software prevents overfeeding of water to the boiler in the event of a failure of the low water cutoff sensor.

대표청구항 ▼

Thus, having described the invention, what is claimed is: 1. A water feeder controller for a boiler, comprising; a low water cutoff sensor positioned with the boiler, the lower water cutoff sensor adapted to transmit a low water signal indicative of a low water level in the boiler; a feed timer ada

Thus, having described the invention, what is claimed is: 1. A water feeder controller for a boiler, comprising; a low water cutoff sensor positioned with the boiler, the lower water cutoff sensor adapted to transmit a low water signal indicative of a low water level in the boiler; a feed timer adapted to feed water to the boiler for a predetermined feed period of time, wherein the feed timer feeds water to the boiler for a full feed cycle to bring the water level in the boiler above the low water cutoff sensor; a delay timer for measuring a delay period of time responsive to the low water signal; and an indicator to signal when a predetermined quantity of water supplied to the boiler has been reached.