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Old 04-14-2016, 03:11 PM   #1
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Suburban SW10DE Water Heater

Trying to see if anyone can help with the wiring of my water heater. The PO installed the unit and ran three wires overhead to the dual switch for gas/electric. My question is should their be a hot wire and ground ran with these to give power and ground to the switches. He has the 12V red wire ran from the water heater wires to the converter fuse block. The PO has a blue, orange and red wire ran from the W/H to the dual switch per Suburban's diagram overhead but not connected for 12V. The 110 side is wired straight from the W/H to the breaker in the converter. Does anyone have a diagram showing how it should be wired or would it be best to bypass his wiring and install the switch near the water heater and have access to pull the right wires. I have a nightmare. Just trying to get the correct wires ran and not burn my unit up. Any help will be appreciated.
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Old 04-14-2016, 06:46 PM   #2
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Suburban SW10DE Water Heater

Update:
If anyone is reading this thread and you have one of these water heaters with the dual switch, could you tell me what wires you have connected to the water heater harness or better a pic of the wires and the 110 connection. Trying to run the wires I need before I get to far with the walls, closet and beds. Want to keep the switch by the kitchen sink area if possible. Thanks
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Old 04-14-2016, 07:59 PM   #3
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If you haven't already, you might google that part number followed by the word installation. You should be able to find the install manual that will show you the correct wiring diagrams.
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Old 04-15-2016, 03:33 PM   #4
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Alcoa Roller;
I pulled up the Suburban manual to get the diagram. I called Suburban which is 20 minutes from my house and they gave me one of their local service centers. Went to them and was more confused than ever, they were telling me the water heater had to have a relay in the electrical line for gas/electric function. The diagram #4 shows a relay on the factory installed parts, asked about that and got the I would have to look at it answer. Figured they would know how the diagram is laid out since they are a service center. Will try to hook up and hope for the best.
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Old 04-15-2016, 05:55 PM   #5
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Here is a link to the Suburban manual: http://www.dyersonline.com/downloadf...tfile_id/1984/

It has 2 separate wiring diagrams on pg. 4….one for the 120VAC side and another for the 12VDC side. There is no relay in use for the 120VAC, and you can easily use a common 15amp 120VAC wall switch to activate the 120VAC going into the water heater. On the front of the unit, you will find an on/off switch in the lower left corner which is a service switch for the 120VAC. There is also a small metal access that reveals the 2 thermostats.

The wiring for the igniter (module) board is simple and straight forward….even color coded. These wires lead to a switch plate supplied with every unit by Suburban. All grounds are clearly marked and very important.

If the PO did not follow these color codes when he ran his wiring, then you have to interpret what he did. There should be a flat, white wiring connector that plugs into the igniter board with the proper color coding as shown in the diagrams. It's for you to decide if these colors follow thru to the switch and indicator light area.

If the PO is using a breaker as an on/off switch for the electric element, this will eventually wear out the break as residential breakers are not designed to operate as an on/off switch like marine breakers are.

You have to identify all of the wires you have, where they go, what the color code is AT THE WATER HEATER"S IGNITER BOARD and follow the wiring diagrams found in the manual.
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Old 04-15-2016, 09:19 PM   #6
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Suburban Water Heater

Thanks Lewster, mine has the two switch panel with the fault light. The PO or whomever ran the wires ran a green wire for the orange and a white for the red power wire for the switches for gas/electric. It scares me that Suburban calls these people their service center and they know all. I don't feel so dumb now since talking to the service center. Once again you have shown your knowledge in the Airstream world. Will be wiring it with the current off colored wires per the diagram I have for the dual switch panel. This is why I come to this Forum for the answers. Thanks all.
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Old 04-15-2016, 09:44 PM   #7
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Quote:
Originally Posted by cole3444 View Post
Thanks Lewster, mine has the two switch panel with the fault light. The PO or whomever ran the wires ran a green wire for the orange and a white for the red power wire for the switches for gas/electric. It scares me that Suburban calls these people their service center and they know all. I don't feel so dumb now since talking to the service center. Once again you have shown your knowledge in the Airstream world. Will be wiring it with the current off colored wires per the diagram I have for the dual switch panel. This is why I come to this Forum for the answers. Thanks all.
If I recall the dual switch panel, the electric side is not rated for 120VAC directly. so you will need to use a relay in that circuit.

Be sure that you have 12VDC and ground to the relay to operate the coil. You then have the 120VAC hot wire running into the relay and then back out to the heater's element.

Just be sure that the relay is rated for 120VAC thru the coil and that it has a 12VDC activated coil. That's all you will need to get it operating safely.
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