Condensate Pump Explained - How To Wire - Faults - NGCFE
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- Опубликовано: 16 май 2024
- #NGCFE #Plumber Condensate pumps have been causing unnecessary confusion in our industry for many years. Their use is generally understood, however the correct installation and operation sequence of them continues to catch out lesser experienced engineers.
Condensate pumps are used when its not possible to take a condensate to a suitable drain via gravity. This could be due to doorways, walls or other issues preventing a natural termination via gravity.
The pump has five wires connecting it to the system. It has a permanent live, neutral and earth feed to the pump itself. It also has two further wires (usually black) that are connected to a safety shut off inside the unit. The pump also incorporates two float switches, The first float switch is there to turn the pump on when the condensate level reaches a certain level. The second float switch is set slightly higher and has the purpose of killing the power to the boiler / heat source if the pump fails to discharge.
As normal, we would give the boiler a permanent neutral and earth feed. The live feed however, is fed via the two black wires so that if the second float switch operates, the float switch will break the connection between the live and the boiler. The reason for this is to ensure that the boiler stops producing condensate which would cause the condensate pump to overflow.
Its really important that we utilise all five wires when installing a condensate pump, not just the live neutral and earth to the pump.
If a condensate pump is installed properly, then it can inadvertently create a confusing situation for a lesser experienced breakdown engineer. On a very cold day, the discharge hose could become frozen and kill the live feed to the boiler. The engineer who is fault finding on the appliance can mistakenly arrive at the conclusion that there is an electrical supply issue to the boiler when really its just a case of a failed condensate discharge that will likely rectify itself when the ice / blockage is removed.
As always, should you want to learn more about anything gas or industry related, please contact us at the
National Gas Centre for Excellence on 01924973260 or visit www.ngcfe.co.uk . 
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Nice to see Mike again ..know him from my days at boiler plan ... I see this all the time it's powered straight to the spur and not looped through on the black wires so easy to do but still not done properly on some installations..
Thank you for your time.
Brilliant vid
Quality lads much appreciated these are great videos... many thanks
Our pleasure!
Brilliant info pal 👍
Another great video. Would have been great to see the opitions to terminate the condesate end pipe.
Thanks
Great suggestion!
Brilliant
Great content as usual thanks Alan
How do you wire it in then it's not very clear I do them from fused spur
Glad you enjoyed it
Thanks for the video. My pump is running constantly as it seems that it has not been wired to the boiler. How much should this job cost? The pump is located around 6 meters from the boiler. Thanks.
Thank you!
You're welcome!
The safety switch wiring has no polarity correct? In other words its just one continuous wire broken into two connectors to put on the condensate pump safety switch. Its either giving power to the unit or the switch is triggered and the power is cut to the unit?
Love this stuff
Can you tell me the best way to fit lagging to this 10mm pipe coming off condence pump do you still take it outside in 32mm pipe
Regards john
couple of questions...... Can we put 240v live from condensate pump to boiler with no earth traveling in the flex as its 2 core? if we have the boiler in a unheated space and the condesate pump fails and cuts the live feed to the boiler the boiler frost stat will no longer work which in the Mi's will invalidate the warranty what do we do about this?
I agree that it’s best practice to have a CPC running through cabling with 230v, opinions welcome. Good thoughts regarding internal frost stat. Personally, rightly or wrongly, I think on the few pumps I’ve been involved in always wired the shut off to the switched live of the appliance.
However, on a rare occasion the condense pump might have failed and frost stat has also kicked in you could have a potential overflow situation, albeit for a short duration.
Sooner or later, it all comes down to moppin'.
Thank You
Hello mate. Not long after putting the heating on I hear like a short rev kind of noise followed by a burst of water rushing through the pipe then the condensate pump will bang loud and fast for a short while. What could be causing this? Do I just need a new one?😮
Ive got the same issue, did u manage to fix it. What was needed. Thanks
Not yet 😞
@@asey89 I will let you know when I know what the problem is
I recently had a boiler service, when i checked afterwards, the condenser pump was full of green gunk and is now not working 😢 😢
Thank You
@@AllenHart999 it wasn't you by the way!
Would be even better if you actually installed it rather than just showed a diagram on the whiteboard