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Author Topic: What is this?  (Read 1122 times)

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Offline Ltjessec

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What is this?
« on: January 25, 2018, 06:47:49 PM »
Hi,
I inherited an Equipex PZ330 from my brother-in- law.  I noticed that this piece is bad.  I wanna replace it but I don't know what it's called.  Anyone know?
« Last Edit: January 25, 2018, 10:54:18 PM by Ltjessec »

Offline apizza

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Re: What is this?
« Reply #1 on: January 25, 2018, 06:58:18 PM »
Not sure of what you are referring to but the wires are connected with a slide on spade lug.
Marty

Offline norcoscia

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Re: What is this?
« Reply #2 on: January 25, 2018, 07:21:24 PM »
My guess (and only a guess w/o looking at the schematic) is a thermal fuse. If you don't know what it is what makes you think it needs to be replaced?
Norm
Baker's Pride GP-61 NG, Baker's Pride M02T 220V, PizzaParty Ardore (with saputo tiles) LP
Focus is NY style but do others too
Preferred Flour (for NY pies) is All Trumps BB
Preferred temperature for NY is 550F, for NP 825F
Preferred type of yeast IDY

Offline Ltjessec

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Re: What is this?
« Reply #3 on: January 25, 2018, 07:30:14 PM »
The top connector is loose.  It makes the oven turn off when it loses contact.  It's riveted.  The rivet is loose.

Offline norcoscia

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Re: What is this?
« Reply #4 on: January 25, 2018, 07:52:42 PM »
Got it, makes sense, good luck with the oven!
Norm
Baker's Pride GP-61 NG, Baker's Pride M02T 220V, PizzaParty Ardore (with saputo tiles) LP
Focus is NY style but do others too
Preferred Flour (for NY pies) is All Trumps BB
Preferred temperature for NY is 550F, for NP 825F
Preferred type of yeast IDY

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Offline barryvabeach

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Re: What is this?
« Reply #5 on: January 25, 2018, 09:21:23 PM »
I am with Norm, if the oven goes off when the lug is loose, without looking at the wiring diagram, it is probably a high temperature cutoff.  It is not uncommon that there is a thermostat that is used to control the temperature of the oven, but the manufacturer includes a sensor that is often shaped like a disc and protrudes into the oven cavity, and is set so that if the temp goes above some number, the sensor trips and the oven goes off.  If for some reason the thermostat malfunctions and get stuck in the on position, it could keep the element on constantly, causing a risk that the temperature far exceeds the design limits and catches on fine.  The high temp cutout is a safety device that will cut off the power.  If you can't tighten up the rivet, I would look to see if you can take out the sensor and find some stamping on it to give you an idea of what you need to buy to replace it.   I tried to find the page in the grainger site, but the site was down for maintenance.

Offline apizza

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Re: What is this?
« Reply #6 on: January 25, 2018, 09:38:19 PM »
I'm going to suggest that the loose rivet is the problem. A bad contact cannot handle that kind of current if it's supplying a heating element. Next step will overheating. Kind of looks discolored already.  You may have to replace what ever it is to get a new connection. Maybe you could find a way to tighten the rivet but a nice clean connection will probably not be possible.
Marty

Offline Ltjessec

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Re: What is this?
« Reply #7 on: January 25, 2018, 09:55:23 PM »
The other side does not protrude into the oven.  It does seem to be made out of ceramic. I looked at the exploded diagram but that part doesn't show.  Ugh.

Offline Ltjessec

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Re: What is this?
« Reply #8 on: January 25, 2018, 10:54:47 PM »
Ok, I traced the wire.  It's the white power wire to this thing and then a short pigtail to the timer. I also included a close up view.

Offline norcoscia

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Re: What is this?
« Reply #9 on: January 26, 2018, 07:59:21 AM »
Barry - do you think the loose rivet issue could be resolved with a proper solder job? - I'm not sure how hot it gets there so I don't know if solder would hold up - in any case it would require the old heavy duty soldering guns - the ones that look like a pistol. If not, be careful removing it - looks like it is riveted in and tiny bits of metal shavings don't play well with electronic circuits.  Keep us posted.
Norm
Baker's Pride GP-61 NG, Baker's Pride M02T 220V, PizzaParty Ardore (with saputo tiles) LP
Focus is NY style but do others too
Preferred Flour (for NY pies) is All Trumps BB
Preferred temperature for NY is 550F, for NP 825F
Preferred type of yeast IDY

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Offline Ltjessec

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Re: What is this?
« Reply #10 on: January 26, 2018, 09:54:02 AM »
Mystery solved!  I took it out and had numbers in the back! Its this.

Offline Ltjessec

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Re: What is this?
« Reply #11 on: January 26, 2018, 10:01:52 AM »
I bought one off eBay. I'll let you guys know how it works out.

Offline norcoscia

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Re: What is this?
« Reply #12 on: January 26, 2018, 10:16:51 AM »
Nice work - thanks for letting us know and looking forward to seeing some pizza pictures!
Norm
Baker's Pride GP-61 NG, Baker's Pride M02T 220V, PizzaParty Ardore (with saputo tiles) LP
Focus is NY style but do others too
Preferred Flour (for NY pies) is All Trumps BB
Preferred temperature for NY is 550F, for NP 825F
Preferred type of yeast IDY

Offline barryvabeach

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Re: What is this?
« Reply #13 on: January 26, 2018, 09:06:01 PM »
It may be obvious to you, but I did want to point out that based on the first ad you showed,  the ideal quantity to buy is 5,000.  That gets you a 26% price break compared to buying between 1,000 and 4,999.  If you bought an extra 5,000 ( meaning 10,000 in total ) you only get an additional 9% price break, and it would take a long time to use up the extra 5,000 units.  https://www.pizzamaking.com/forum/Smileys/enhanced/smiley.gif

Also, make sure you check the plate on the back of the oven and confirm the volts and watts.  I checked an online manual, and it says 120 volts 15 amps,  which means the ebay auction should handle that voltage and wattage, but you need to check your oven to be sure.  One thing that concerns me is the one you linked says 120 C is the cutoff temp,  which is around 250 F.  That may be right if it is not connected to the oven cavity, and is instead measuring the temp in the chassis.  If it goes into the oven,  I would seriously hope it has a higher cutoff. 

Offline Ltjessec

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Re: What is this?
« Reply #14 on: January 26, 2018, 09:26:24 PM »
Lol,  I wasn't gonna buy the 5000 units.  I just wanted to show the picture.  It measures how hot the wires get because of the current.  It does not go off of the internal temperature of the oven.

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Offline springhillcindy

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Re: What is this?
« Reply #15 on: January 30, 2018, 06:55:21 PM »
Based on the discoloration on the spade lug on your thermostat you should also replace the female spade on the wiring harness.

Offline Ltjessec

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Re: What is this?
« Reply #16 on: February 15, 2018, 06:11:57 PM »
Thermostat arrived from China.  Works great! First Pizza!

Offline bjab

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Re: What is this?
« Reply #17 on: February 25, 2018, 08:28:44 AM »
What did you do? Drill out the rivets and replace the new one with stainless steel screws ?

Offline Ltjessec

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Re: What is this?
« Reply #18 on: February 25, 2018, 02:49:03 PM »
 Yep.  Working great!

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