View Full Version : HLP4745 Help
Hi
My sump pump Deltec HLP4745 has packed up, it has lost / low pressure out. I found an article on your old web site re shutting of / on the valves on the pressure side / non pressure side for bleeding. Unfortunately I have not installed any valves on my set -up either side of the pump etc. Is there anything other way I can bleed the pump ?.
Regards
Dave
Most issues we get with hlp pumps is usually associated with lack of cleaning/maintenance of the pump.
Hlp pumps can get clogged up with snails and calcium deposists and due to the design of the impellor wheel this can become restricted in its movement and then flow is effected.
I suggest that you give the pump a good clean first of all. Remove the pump from the system and cap off the inlet with a plastic bag held on with an elastic band (or use the screw on cap supplied with the pump). Then fill the pump with Rowa eze clean mixed with water or use slightly diluted white vinegar. Soak the pump for a few hours then flush out with fresh water. Please ensure that water does not enter the electrics box on top of the pump.
Your pump may be too dirty to be cleaned this way and may have to be stripped down and manually cleaned first. Snails can get trapped inside the impellor and you may have to remove them with a cocktail stick or similar to fully clean the pump. Please note that the impellor cannot be removed so do not try to remove it! The screw on the impellor that looks like it holds the impellor on is there for a reason of which i will explain shortly. Reassemble carefully and it should be ok.
Usually when the hlp needs bleeding the pump will run far hotter than normal and will start to trip out. This is because every hlp has a thermo cut out switch built in to protect the pump. I suspect that your pump needs an good clean but i will explain how to bleed the pump.
If your pump has a red dot on the top of the pump then it is the new style and to bleed simply unscrew the chrome nut at the back of the pump, but not all the way. Usually we would recommend closing down the pressure side with a fitted shut off valve (tap). This pressurises the pump and forces the trapped air out of the back. In you case you would have to block the water return pipe in the tank by using your hand to pressurise the pump. Do this quickly several times, then retighten up the nut at the back of the pump.
If your hlp is an old style pump (no red dot) then to bleed the pump the pump has to be removed first from the system. Remove the screw that looks like it id holding the impellor on and the refit the pump to the system. Restart the pump and run for couple of hours without the screw in place (this is ok to do). The pump has a hollow shaft that runs inside the pump. By removing the screw the air trapped in the back of the pump can escape out. The screw is there to stop the hollow tube becoming blocked with calcium etc. If this happened then you would be unable to bleed the pump. Once everything is ok, remove the pump again and refit the screw. Then put the pump back onto the system. You must refit the screw. This is important.
Sometimes the pump will run hotter if it needs servicing. I had one guy who contacted us with a similar problem to you. When asked when he last serviced the pump he said 'about 18 months ago!' After cleaning they where fine.
I would imagine that yours must be a pain to service as you have not fitted shut off taps either side of the pump. For this reason the pump may not get as much attention as it should. I would recommend that you fit these taps as it would make life easier for you.
Hope this sorts out your problem.
Regards,
Leigh Dawson
D-D
Leigh
Mine is the newer type with the red dot on top. I will give it your advice a go today. Must admit I can't remember the last time I cleaned the pump it must have been well over a year. Although the impellor seems very clean and spins very freely. I do have a guard / grill on the input side. If I can get it working I will install a couple valve's either side to help with servicing as said yes it has been a pain in the past having to drain my last sump compartment to work on the pump.
Thanks for the reply
Dave
Hi Leigh
I've cleaned the pump with a white vinegar solution, but now when I switch it on it seems to have stopped working all together, whereas before is was pumping although very weakly. As I said before when I have removed the four bolts / pump case housing the impellor seems to spin freely. Is there anything else I can try or is it destined for the bin ?. Alternativlely do D&D do a repair service ?. The pump is out of warranty but may be cheaper to repair than replace.
Regards
Dave
Could be an electrical problem with the pump. It may be possible to send the pump back to Deltec for inspection/repair. This may be the best way forward as you have tried everything else.
You would have to send the pump back yourself to Germany. I would be unable to give any indications of how much a repair would cost, but i think it would be worth having the pump repaired.
If you are interested in doing this please pm me and i will give you all the details etc for you to get things moving.
Leigh
Could be an electrical problem with the pump. It may be possible to send the pump back to Deltec for inspection/repair. This may be the best way forward as you have tried everything else.
You would have to send the pump back yourself to Germany. I would be unable to give any indications of how much a repair would cost, but i think it would be worth having the pump repaired.
If you are interested in doing this please pm me and i will give you all the details etc for you to get things moving.
Leigh
Leigh, why does he need to send it to Germany, when mine went wrong i sent it back to the UK address and i know a friend of mine did the same many times with the many units he has, have you now stopped the UK service?
:)
All out of warranty hlp pumps were at one time sent to our head office and then shipped in batches to Deltec in Germany for repair. But due to various issues in the past we decided to let the end customer send their pumps back to Deltec themselves.
We do this because it saves double shipping of the pump, which in turn saves costs to the end customer. Also the pump is returned far quicker than it having to go to us first, then forwarded onto Deltec and then back to us after the repair. This way the customer can have the problem addressed far more quickly than before.
We have never had a Deltec repair centre in the UK and all pumps for repair returned to us have gone back to Deltec in Germany.
All out of warranty hlp pumps were at one time sent to our head office and then shipped in batches to Deltec in Germany for repair. But due to various issues in the past we decided to let the end customer send their pumps back to Deltec themselves.
We do this because it saves double shipping of the pump, which in turn saves costs to the end customer. Also the pump is returned far quicker than it having to go to us first, then forwarded onto Deltec and then back to us after the repair. This way the customer can have the problem addressed far more quickly than before.
We have never had a Deltec repair centre in the UK and all pumps for repair returned to us have gone back to Deltec in Germany.
Makes sense so does that mean your swap out policy you used to offer if you had the unit in stock has also stopped then.
:thumbsup:
The swop over policy only applies to pumps under warranty and we still operate this system when required.
The swop over policy only applies to pumps under warranty and we still operate this system when required.
:thanks:
Hi Leigh
Just thought I'd give you some feedback, pump returned back today from Deltec today they replaced the faulty part FOC well chuffed, Total cost 75 Euros inc P+P. This included replacement feet (you did warn me re packing well). I must say the communication from Deltec was excellent. I can't put in back on my system for now as I'm off on holiday early tomorrow. Can you advise me further I want to put valves either side for servicing as per your previous reply. What size valve's do I need ? I been reading a few links that you need a size bigger than the pipe diameter e,g 40 mm on the inlet and 32mm on the outlet would you know if that's correct.
Regards
Dave :applause:
Hope Leigh does not mind me answering for him,
For your pump the following should be used,
Inlet 32mm
Output 25mm
If your going to fit taps make sure the inlet size matches the sizes above so you do not restrict the flow through the tap.
Hope that helps.
Stuart Bertram
17-10-08, 19:00
Leigh's computer is on the fritz at the mo.
you should fit a 40 ml valve on the suction and a 32 ml on the outlet.
The 40 valve has a 32ml bore and so it keeps the flow unrestricted, same with the outlet.
Always fit a tap one size larger than the pipe bore
Cheers
Stuart
Cheers Stuart
Thanks for the reply, those are the sizes I was going to order, I just needed some confimation on this.
Regards
Dave
:thanks:
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