pumps

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  1. buzzlightyear

    heat source pumps wiring

    any body point me to the right direction on heat pumps wiring ,or done any or pdf how the wiring done on them .
  2. SJD

    UPS specification for pool pumps

    Background A pool installation uses two single phase pumps to circulate the water (through a boiler, and filtering, dosing etc). The pumps are controlled via contactors in the pump house, plus a remote emergency stop close to the pool. The location is somewhat rural, and prone to power cuts...
  3. E

    Diesel Fire Pumps

    Hello! I have a diesel fire pump and jockey pump. The Article 695 by NEC is only for ELECTRIC Motor Fire Pumps? For diesel drive, the control panel must be connected like 695 article indicate? Or i can to connect the fire control panel with another load?
  4. Dan

    Ground sourced heat pumps - how they work

    https://www.theguardian.com/technology/ng-interactive/2023/dec/23/heat-pumps-science-visualised?CMP=Share_AndroidApp_Other This guardian article explains it really well with awesome graphics. How many of you guys are into this?
  5. pirate

    Anyone watched the TV documentary tonight about Heat Pumps and electricity supplies in general?

    Seriously just wanting to have a discussion on this huge issue. Clearly, there are not enough competent installers of heat pumps, so we may see some scheme whereby one can get "qualified" in a short time. I have views on this, and I have views on everything the documentary covered, but my...
  6. P

    Need help to modify an electrical scheme for pumping recycled water

    Dear Forum, I recently joined this forum, and writing for the first time. I like DIY activities, both for hobbies both to fix and repair stuff in my house, but my knowledge into electrical field are very limited. Here the problem: I am doing a system for the recycle of rain water. Briefly, the...
  7. P

    2 pumps on one system

    Hi there, the heating system I am working on has 6 zones and valves for each zone which was working fine with one boiler and one pump. some rads weren't getting hot so the plumber has installed 2 x pumps, one for 3 zones and another for 3 zones, the problem is I originally had all the oranges...
  8. M

    Heat pumps: where to terminate motorised valves

    Hi, I’m just wondering has anyone on here any experience with a Mitsubishi Ecodan R32 model. I’ve completed all the wiring expect for terminating two motorised valves. I cannot find a manual stating what terminals they go into. Any help is really appreciated. Thanks
  9. Vortigern

    I always thought heat pumps were expensive waste of time

    We have just done a new build and put in a heat pump. 6kw supply. Insulation galore. I don't think it's gonna work.
  10. littlespark

    Air Source Heat Pumps... Questions!

    Listening to the radio the other day, and UK govt has announce no new gas boilers to be sold by 2035 and everyone should go with ASHP... £5k grant to get one..Let me add... only england and wales. We'll stick with peat up here for now. The following questions. Probably easy to answer, but just...
  11. Gavin John Hyde

    New DNO notification form for EV and Heat Pumps etc

    There is a new form on the horizon for EV charge points. Some interesting criteria now apply, If you are not sure what the fuse is then you must submit the form in advance of install regardless of max demand. At present if the MD is <60 amps you can notify once installed. Most of mine are done...
  12. Rockingit

    Garden / Hot Tub / Pond pumps feed

    Just want a quick foggy-Monday-morning-brain check..... Customer wants a mixed feed for general outdoor shenanigans, plan is to run a supply from a KMF in the meter box down some 10mm SWA to an outdoor pillar style distro and then go from there. If divorce it at the pillar box, so the entire...
  13. A

    Wet UFH pumps causing RCD tripping

    I have a customer with a problem of RCD tripping caused by the wet UFH systems. There are 5 UFH areas each with a Wilo Para pump attached. Along with this there are 5 Grundfos pumps assisting the flow of water around the property. The System is setup with Heatmiser NeoStats wired through the...
  14. E

    DC Wiring help

    Im looking for some advice on some dc wiring i have in place. Currently i have some monitoring equipment that wont run when connected to a run of wire about 40m long (1.5mm diameter) it is connected to a 12v 100ah battery and what i think is happening is the voltage drop over that distance is...
  15. S

    Horstmann Economy 7 - Boost Working but when on timer no water heating overnight

    Hi there, In my apartment I have a Horstmann Economy 7 2 hour water heater system, in recent weeks it has stopped working overnight, when I wake up in the morning there is no hot water. I've checked / reset the clock to make sure its set correctly & it does seem to be turning / moving ahead as...
  16. Rockingit

    Anyone know much about shower pumps?

    My own shower pump (pressure assist type) is behaving oddly and before I go ripping things apart wondered if anyone has any advice: It turns on (so the internal flow switch is OK), runs smoothly (no obvious sounds of the motor grinding to death) but after a few mins cuts out. Give it a while...
  17. C

    Lake Areation Pumps

    Hi guys and gals, I've been asked to install 5 aeration pumps on a large lake. The pumps are 1kw each. The first pump is 150 meters from the property and the furthest 350 meters. Can I run these as a radial dropping the SWA CSA as I go, I calc'd the initial run would be in 25 for the first...
  18. J

    Understanding/fault finding jacuzzi pumps

    Hi All Been on a job today and while there was asked to look at jacuzzi which hasn't been working for a good while. Wondering if anyone got much experience of these mine is completely zilch. I proved 230v coming in to motor pump but beyond there I haven't got a clue on the mechanisms to make...
  19. S

    Vacuum and compressor automation

    I've been asked to design a panel for 2x 3phase comressors and 2x 3phase vacuum pumps. Non of the motors can start at the same time and between the 2, they have to run alternately. The vacuum pumps need to be wired so that if more vacuum is needed the other will start. Keep in mind that when...
  20. Mike Johnson

    Variable speed Pool pumps, France

    A lot of guys around my area of France have spent over €1500.00 on variable speed pumps for their pools, the saving on electrical consumption can be quite considerable over a year, but the cost of the pumps against a standard pump at €400.00 seems to beg the question can't a controller be used...

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