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| Thread ID: 65705 | 2006-01-27 19:53:00 | Electrical/plumbing help please | Greg (193) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 424692 | 2006-01-28 07:42:00 | The Methven (Nefa) installation instructions are here www.methven.biz click on "The Book" - PDF file.. | Dusty (3931) | ||
| 424693 | 2006-01-28 08:30:00 | That's a pressure relief valve in the first picture, with the exit pipe going down through the floor. Is this upstairs, Greg? We're in a single level house. If this thing blows up me and missus are going sky-high cause it's right next to our bedroom :dogeye: All the other comments by everyone are sheer Greek to me...! :confused: |
Greg (193) | ||
| 424694 | 2006-01-28 08:31:00 | Draining that cylinder could be acieved by shutting the supply, turning off the ball valve, and breaking the crox nut just above it. I dought if that would meet regulation, but now that its there there is no point in doing anything about it till you need to drain the cylinder. There is no tempering valve... thats a worry. the tempering valve grabs cold water from after the pressure reduction valve, and mixes it with the hot stuff from the cylinder, and as obvious, water from the pressure reduction valve goes directly to the HWC... bad bad bad. the only way there's a tempering valve is if theres another pressure reduction valve, which is messy, or if that detail was forgotten, which would be unstable at best... |
personthingy (1670) | ||
| 424695 | 2006-01-28 08:47:00 | though I don't think the one picture will hold much back, it looks like it is secured with a single woodscrew.My photo doesn't show it properly. There's actually two straps, and each are secured on each side with two or three screws. The straps feel pretty secure. | Greg (193) | ||
| 424696 | 2006-01-28 09:19:00 | If it's any help to resolve what I should do, here's some more images: www.imagef1.net.nz www.imagef1.net.nz www.imagef1.net.nz www.imagef1.net.nz I've never thought that there was so much to plumbing and hot water cylinders before. I just want to live a quiet life without explosions! :D I should mention, with some embarrasment, that the cylindrical metal tin on the top, visible in some of the images, was put there by missus to dry it out. I actually thought it was part of the water heater's structure until I touched it and it moved. :( |
Greg (193) | ||
| 424697 | 2006-01-28 19:05:00 | LOL Yeah I never thought there was so much to plumbing either, until I satrted to do it myself. You have a tank up the hill full of water, tap outlet, clean pipe, run it down the bank, go back up turn tap on, go back down - no water comes out. Mate of mine's who's a plumber told me about the 'hydraulic gradient'. Good on you trying to nut it out yourself, but peace of mind in the home is having a plumber checking over your high pressure HW system. |
mark c (247) | ||
| 424698 | 2006-01-29 00:43:00 | Looks good to me, Greg . There is an easy way to dran the cylinder, iif that's ever needed (to replace that 8KW element) . The "valve6" picture shows a shutoff valve and a non-return valve on the pipe coming in horizontally which then makes a nice neat 90 degree turn to the other shutoff valve . It would be simple to shut both valves, remove that secition of pipe, and connect a hose to the one on the cylinder . Run the hose outside, and open the valve . You'd get an electricialn in to replace the element, so you can tell him if he doens't know . (Maybe a plumber wouldn't know either ;)) . The pressure relief valve is there to protect you if the thermostat doesn't work, and your HW cylinder does become a steam boiler . I wouldn't like to be around if it burst (at well above the pressure the safety is supposed to pop at (1400 kPA --- about 200 psi) . That would be some very hot steam . The pipe going into the floor will make a right turn and should (or must . . . I think it has to be visible) come out the side of the house . |
Graham L (2) | ||
| 424699 | 2006-01-29 00:59:00 | imho........ if memory severs me right theres often a pipe that comes out of the cylinder on the bottom of it for draining. you don't see it as the cylinder is sitting on the floor. its just a bugger that you need to crawl under the house to drain the tank. tempering valve is not required and personally i hate the things as you can't get the water hot enough. 55 degrees....what a joke! talk about a PC and cotton wooled world. i don't know of anyone who tests the pressure release valve, just make sure the end of the outlet is not blocked (by plants etc). |
tweak'e (69) | ||
| 424700 | 2006-01-29 01:00:00 | Thanks. But I still don't know if there's "valve easing gear", and if so,to operate the valve as per the instructions "Lift the lever, hold open for 2 - 3 seconds, and lower the lever to reset the valve" which one do I move? (there are two levers... the black one at the bottom and the copper one at the top). I guess I'll just give the plumbers who supplied the thing a call. Shoulda done that in the first place. |
Greg (193) | ||
| 424701 | 2006-01-29 01:07:00 | Your valve1, valve4, and valve5 pictures show the valve . There's a lever on it . Lift it and listen . Release it, and listen to the silence . :cool: If you don't get silence, ring the plumber . Repeat in six month's time . |
Graham L (2) | ||
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