Heating Field Controls Field Controls Venting | Oil Fired Secondary Safety Kit

The Wmo-1 Blocked Vent Switch Is Recommended For Installation With Anoil Fired Appliance That Normallyoperates With Its Vent System Under Anegative Pressure. This Device Isintended To Detect A Blocked Ventsystem, Responds To Hot Flue Gasesbacking Up Through Its Heat Transfertube, And Can Be Wired To Shut Off Theoil Burner. It Requires Manual Resetting.