MOVs (metal oxide varistors) and specially designed RC (resistor-capacitor) networks are usually used to accomplish this. Switch A switch is a device for opening and closing, or for changing the connections of a circuit. NNote: A switch is understood to ...
Check for: - Restricted vent - Proper vent sizing - Loose blower wheel. - Excessive wind - Dirty filter or restricted duct system. - Defective blower motor or capacitor. - Defective switch or connections. - Inadequate combustion air supply (Flame Roll-out Switch open). 34 IGNITION PROVING ...
ATTENTION: Removing MOVs in drives with an embedded filter will also disconnect the filter capacitor from earth ground. Disconnecting MOVs To prevent drive damage, the MOVs connected to ground shall be disconnected if the drive is installed on an ungrounded distribution system (IT mains) where the...