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  • LX30H Rinse cycle question

     fixbear updated 8 months, 3 weeks ago 3 Members · 10 Posts
  • K15k

    Member
    March 4, 2021 at 3:49 pm

    I have a Hobart LX30H. Bought it used. Everything seems ok ,but the rinse cycle. When it gets there it drain after wash, then the rinse comes on display. I do not here the arms moving in machine, but the temp does go up past 180. Is the pump suppose to kick on for the 10 sec rinse?

  • fixbear

    Member
    March 4, 2021 at 3:56 pm

    No to the pump, it uses line pressure and the rinse arms ( smaller arms) in the machine for the rinse. The pump is connected to the wash sump and has the soap. So no pump for the rinse. However, you do have to have the correct line pressure for the rinse to work correctly. The fact that you see the rinse temp go over the 180F sanitation mark is a good thing.

  • fixbear

    Member
    March 4, 2021 at 4:10 pm

    K15K, if you like, I'll explain the principle of commercial warewash machines and what to watch for.

  • K15k

    Member
    March 4, 2021 at 4:23 pm

    That would be great, e-mail me at K15kors@yahoo.com and I’ll shoot you my phone number, and help on this machine would be great news for me

  • ectofix

    Member
    March 4, 2021 at 5:27 pm

    I'm sure a conversation with fixbear would be informative.

    Here's an owners manual for your new (old) dishwasher:

    LX SERIES DISHWASHERS

    Here's a training video Hobart made for it:

    Hobart LX30 Undercounter Warewasher Training

  • K15k

    Member
    March 4, 2021 at 5:56 pm

    Thank you Ectofix, video was very informative. Still don’t know the amount of soap to use yet. Mine is a manual load for soap. Soap is on order and maybe tell me how much to use. I’m going to return the pressure regulator I bought for RV use. I’m not sure which one to buy. I have a well with a good softener system by Culigan. I think my psi goes as high as 50psi. Hobart says not to go over 25 psi

  • fixbear

    Member
    March 4, 2021 at 6:02 pm

    It's simple. There are two kinds of wash cycles. Low temp and High temp. Low temp requires a 140F and expensive chemicals for the sanitation cycle. They also do not dry well. Most commercial machines will wash under 3 minuets cycle. The High temp machines have to have 180 or above for the sanitation cycle. That means they have a water booster in the machine. But house water should still be above 140F. If lower they use a bigger booster.

    Now when you turn on the machine, water goes in through the rinse arms to fill the wash tank. Most have a sensor in the tank to check the ph to inject cleaning agent in the proper amount. When the wash cycle is triggered, whether a conveyor or batch machine. The tank has to be to temp and full for wash. If low on cleaning agent, the injection system will add cleaner. Different brands and models use anywhere from 60 second wash to 3 min wash unless the operator puts it into continuous wash for heavy cleaning. With door machines, At the end of wash, The pump stops and a solenoid opens the rinse valve. It also turns on the rinse agent pump. Remember that the rinse water dilutes the wash water. It also overflows the tank to carry off top scum. That means that it also has to add more detergent in the next cycle. With conveyor machines the rinse goes to the last wash tank, from the last wash tank to the next etc.

    If you look in you machine, You will notice that there are two sets of arms. One is lighter with small nozzles for the rinse. The wash arms will be bigger and have larger ports to handle the water from the pump. Most machines will have a pump from 3 to 7 hp. I have run into some economy units that are only 1.5 hp. But all the serious ones are bigger. The high volume of water and heat is what blows the residue off the dishes. That means you have to cover light objects like silverware to keep them in the rack. Understand, that the scullery station has to be very though in precleaning. otherwise the wash sump will get loaded with food and the dishes will not clean properly. And the pump suction will get restricted form the screen getting loaded.

    This covers both door machines and conveyor. Some of the high capacity conveyors have several tanks and wash pumps. Steam condensers, loading stations, and unloading stations. They also require a good crew to run them.

    Now with your small undercounter, It's as simple as it gets. The trick is to have a good chemical supplier and soft water.

  • fixbear

    Member
    March 4, 2021 at 7:15 pm

    Now you have me wondering. What are you using it for, and why not hook up the soap and rinse air system?

  • K15k

    Member
    March 4, 2021 at 7:23 pm

    Well my machine LX30H did not come with that add on of a soap and rinse pumps. So I have to add soap myself at the beginning or each load. I could call Hobart for the add on, but I’m sure it costs hundreds of dollars. I hope this clears my soap question up. I’m sure it is only around of a table spoon of liquid soap. Waiting for soap to arrive from Amazon.

  • fixbear

    Member
    March 9, 2021 at 2:23 pm

    Most hand soap addition people use a dry powder.

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