Question about 1993 Honda CB 1000 Big 1

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Drained radiator now none will come on how do i fill them again without damaging boiler

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The 1994 CB1000's radiator cap is under the gas tank. Removing the gas tank is a bit of a project the first time you do it, but it only takes about 15 minutes once you know where all the tubes and bolts are. I found it easier to remove the fuel switch from the frame than to disconnect it from the tank too (for ease of reassembly).
If you have two guys, just take the plate off, and carefully lift up the rear of the tank without disconnecting anything, and the second guy should be able to reach in and get the cap off the radiator. You could use a funnel with a length of flexible tubing on it to add coolant. This approach would definitely require two people (unless you care to try your luck propping the gas tank up on something, which I would not suggest).

Posted on Oct 17, 2011

  • Spam Bin Oct 17, 2011

    To get to the plate that holds the gas tank down, just take the seat off. It is probably a good idea to take the whole tank off anyway; the bike is over 15 years old, and it's time to inspect all those rubber hoses before one develops a big crack in the middle of nowhere.

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To lower pressure in c h boiler


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I have just moved one radiator in my bungalow from one wall to an adjacent wall. I used the same flow and return pipework I only had to shorten it. I turned the water off and drained the rad and vertical...


When you reinstalled the radiator did you install a purge vent on it? If not, then there is a good chance that the radiator is air bound, and therefore will not fill.
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I can only get heating to the radiators upstairs, not downstairs


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www.jollygreenplumbingmachine.co.uk

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Hi I would like to drain the water out of my radiators so I can change the 2 zone valve on my heating system. It is allowing water to bypass so needs replacing but i dont want to flood the house. Please...


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How do I re-pressurise the boiler via the temporary filling loop


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1 Answer

I'm a new plumber. I was asked to restart a burnham gas fired steam boiler in a fire damaged apartment. The boiler was drained last winter along with the radiators but was not winerized. I am their plumber...


1. You need to fill the entire system with water before you fire it, boiler AND radiators... Then, you would normally vent as much of the trapped air in the system as you could... It's not like you are only going to fill just the boiler and then pump that water through the pipes.

There is a temp setting on the boiler, but I don't think that's a solution. Remember that the water in the system is going to begin circulating as soon as you start the boiler. So, it will start circulating when it's cold, and then gradually warm up.

Your problem is not the sudden rush of hot water, it's going to be filling the system in the first place, and getting the boiler started before the system freezes up ...

I don't really have any suggestions for you though, other than perhaps renting one of those construction heaters ... and bring the building temp up a bit. But there's certain dangers associated with them too... Carbon Monoxide for one, fire is another (if used improperly).

Just thought of something: Fill the system with glycol based anti-freeze solution that's designed for heating systems. That oughta do it...

I'm guessing there's not a functioning water heater either at this point, is there ? If there was, you could possibly rig something up to fill the system with lukewarm water, and fire it before it freezes up.

2. You don't have a lot of choice. You have to fill the system, fire the boiler & wait.
It is going to take a long time to get the system up to temperature. Instant circulation is a double edged sword. The upside is you get a little bit of heat into the water & have it moving making freezing less likely. The downside is, it's hard on the boiler with that much cold water coming back you are likely to have condensation.

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