Help With Nameplate & Specs

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Little Bill

Little Bill

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I was sent these pictures of a used commercial dishwasher wanting help with connecting the electrical. I've figured out most of it but some I'm unclear on.

According to the nameplate the voltage is 120V/208-240V 3W. So they have 120V/240V power with high leg (open delta)
I know that they need to hook it up as 3-wire, 2 hots and neutral, being careful to stay off the high leg.



This is where it gets muddy for me. I know what MCA and Max OCPD
is but according to this chart I'm not sure if the MCA & Max are the same or "H" is one and "C" is the other.
The bullet marks * and ** are used to check foot notes H=hot (booster) C= Chemical (non-booster).
So I'm not sure if you use one or both. So if "H" is used it says 50A. But is that both the MCA and Max OCPD
And if "C" is used its 20A, again 20A for min and max?



I'm not even sure if their machine is both "H" and "C" or one or the other.
Mainly what I need to know is wire and breaker size for this.
 
My take on it is:

1. that either you use the H20 booster, or you can not use the booster if you are using a certain type of chemical detergent. I assume there is a switch or connection for the booster that you have to set appropriately?

2. Regarding MOCP/ampacity, it just seems they dont have an allowance for a larger OCPD than conductor as we are used to for AC equipment.

3. What I am not clear on is the various supply options. Why would one chose to run L1.L2,N when they could just run L1,L2. Also why does the 208-240/60/1 chemical option draw the same as the 120/60/1 chemical option :?:
 
Last edited:
electrofelon said:
My take on it is:

1. that either you use the H20 booster, or you can not use the booster if you are using a certain type of chemical detergent. I assume there is a switch or connection for the booster that you have to set appropriately?

2. Regarding MOCP/ampacity, it just seems they dont have an allowance for a larger OCPD than conductor as we are used to for AC equipment.

3. What I am not clear on is the various supply options. Why would one chose to run L1.L2,N when they could just run L1,L2. Also why does the 208-240/60/1 chemical option draw the same 120/60/1 chemical option :?:
Click to expand...

Craziest set of specs I ever seen!
Usually a manual will have several models with specs and you choose according to the model you have. But usually on the equipment itself there is only one set to choose from.
I don't know why they offer double pole single phase w/neutral and just double pole no neutral. I guess it's how the control panel is wired.
 
I would suggest that you call Hobart with any questions. The good thing is they are still around and calling on a cell phone doesn't cost anything.
 
I assume if the dishwasher has a booster than the booster amps is 50. If there is no booster but a chemical (injector I guess) then it is 20 amps. I assume the 37 amps is for just the motor. I can't tell if the booster is a separate animal or what
 
Little Bill said:
I was sent these pictures of a used commercial dishwasher wanting help with connecting the electrical. I've figured out most of it but some I'm unclear on.

According to the nameplate the voltage is 120V/208-240V 3W. So they have 120V/240V power with high leg (open delta)
I know that they need to hook it up as 3-wire, 2 hots and neutral, being careful to stay off the high leg.



This is where it gets muddy for me. I know what MCA and Max OCPD
is but according to this chart I'm not sure if the MCA & Max are the same or "H" is one and "C" is the other.
The bullet marks * and ** are used to check foot notes H=hot (booster) C= Chemical (non-booster).
So I'm not sure if you use one or both. So if "H" is used it says 50A. But is that both the MCA and Max OCPD
And if "C" is used its 20A, again 20A for min and max?



I'm not even sure if their machine is both "H" and "C" or one or the other.
Mainly what I need to know is wire and breaker size for this.
Click to expand...
Good luck!
 
Commercial dishwashers have 2 options for sanitizing in the final rinse:

1. inject a chemical sterilizer into the final rinse water

2. Boost the final rinse water over 180*F.

This machine appears to be the latter and it appears (at least from the specs) that the booster is built in.

50 amp conductor and a 50 amps OCPD at 120/240 would be my choice.
 
Last edited:
mbrooke said:
Commercial dishwashers have 2 options for sanitizing in the final rinse:

1. inject a chemical sterilizer into the final rinse water

2. Boost the final rinse water over 180*F.

This machine appears to be the latter and it appears (at least from the specs) that the booster is built in.

50 amp conductor and a 50 amps OCPD at 120/240 would be my choice.
Click to expand...

#1 is a low temp dish machine.

#2 is high temp dish machine.
 
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