They can be mounted in any orientation and are immune to harsh shake and vibration found in the vehicle environment. The Isolator Relays are ignition protected, so they can safely be mounted in a convenient place near the battery. These relays, with their heavy construction, can easily deliver the needed current. #Big boy battery isolator relay making noise manualC 041508 Intellitec SERVICE MANUAL BATTERY DISCONNECT 200AMP BIG BOY THE RELAY - How It Works The Battery Disconnect Relay is a mechanically latching switch. Does NOT include: Wiring, Hardware, Adhesive/sealant, installation instructions or tools. #Big boy battery isolator relay making noise fullIn a jump start environment, the relay may have to deliver the full starting current of the engine. BATTERY DISCONNECT 200AMP BIG BOY - Intellitec P/N 53-00507-100 Rev. Includes: One (1) Intellitec Big Boy Isolator Relay 200 Amp for use on many Holiday Rambler, Monaco Coach, Fleetwood RV Motorhomes, American Coach and several other makes and models of Motorhomes by leading RV manufacturers. To be sure these relays can perform under these harsh conditions, the contacts are protected with a unique antioxidant coating. The relay contacts must close and provide a low resistance without the benefit of any arcing for cleaning. The 200 amp version is not a continuous duty unit and requires an Isolator – diesel controller to prevent it from over-heating when it is used for continuous duty.Ī momentary, dash-mounted switch can also be added to provide a “jump start” for the engine, from the auxiliary battery. Put the old one back in and the next trip back to the dealer they checked it out and apparently that is a normal sound. It is installed between the two batteries, connecting them together for charging. The Big Boy Battery Isolator Relay #77-90006-120 provides a simple, reliable and cost effective means of isolating two battery systems. The 200 amp Isolator Relay is designed for heavier duty applications. The set up is like this Positive wire hooked up from starter battery > switch->isolator->home batteries-> etc. These relays have been designed and are built to meet these demanding conditions. In this application, these relays are required to operate with almost no voltage across their contacts and carry currents ranging from milliamps to hundreds of amps. Also it is normal for the big boy to cycle between battery banks. Once I cleaned mine the noise from the Big Boy was much less. Thats assuming you have a corrosion build up. Ive never used the disconnect switch, preferring to use the battery isolator in the battery bay, and Ive never understood why RV. Disassembly and cleaning should bring it back to normal operation. If you have a house battery disconnect switch near the entry door of your RV, its a good bet that it switches a Trombetta relay/contactor, which in turn isolates the house batteries from your 12V fuse box. Specifically designed to be used to isolate two battery systems. Big Boy will make more noise as the corrosion on the inside becomes greater. Big Boy Battery Isolator Relay #77-90006-120
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