Hottop minimal elegant modification to attach to vent - Page 2

Discuss roast levels and profiles for espresso, equipment for roasting coffee.
User avatar
sweaner

Postby sweaner » Dec 03, 2018, 1:26 pm

I love this, as I routinely wander around the Home Depot looking for things to use for what they are not made for! It can be a challenge.
Scott
LMWDP #248

www.coffeefreek.com

User avatar
yakster

Postby yakster » Dec 03, 2018, 4:48 pm

Working for manufacturers, I've learned that many times the length of the warranty is more about sales than quality. Increasing the length of the warranty is sometimes done to boost flagging sales numbers.
-Chris

LMWDP # 272

stevanpierce

Postby stevanpierce » Dec 06, 2018, 1:49 am

crunchybean wrote:Actually the warranty is only for a year. In my opinion it's def a drawback. In my reasoning, they are a new and small company. I'm actually glad though when I heard there was one. Only imagine for any company trying to expand their business and the worst happens. It showed some faith in the product, and they did do an insane stress test in the kickstarter. If I remember correctly they ran the machine constantly for 30 days.


I'd check your credit card to see what added bonus they have. My Chase card adds a year onto any warranty in effect making it a perm extended warranty....you also might get other goodies, ie travel insurance and trip interruption. This isn't a guaranteed thing with all cards just a good chunk. A lot of people, including myself not too long ago, don't check this stuff out.

Capuchin Monk

Postby Capuchin Monk » Dec 06, 2018, 2:33 am

BarryR wrote:To make sure everything fit right, I took the rear fan cover to Home Depot with me and semi-assembled everything there. I roasted today and it worked great. Despite only being attached at the top of the fan, no smoke leaked and there's little play.

Is there a bit of gap between range hood and duct attached to it? If not, it may be a good idea to have little. This will ensure that not too much suction is created which can affect the roasting temperature.

BarryR

Postby BarryR » replying to Capuchin Monk » Dec 06, 2018, 9:17 pm

It's a 4" duct going into a 36 X 24?" hood and there's no intimate fit from the duct to the vent hood so this is not an issue.
I left this picture out in my original post but it shows the exhaust end well.
Image

crunchybean

Postby crunchybean » Dec 08, 2018, 3:32 pm

stevanpierce wrote:I'd check your credit card to see what added bonus they have. My Chase card adds a year onto any warranty in effect making it a perm extended warranty....you also might get other goodies, ie travel insurance and trip interruption. This isn't a guaranteed thing with all cards just a good chunk. A lot of people, including myself not too long ago, don't check this stuff out.


Great tip! Yea I was aware of it but the card I was using at the time didn't have it.

Jwj1953

Postby Jwj1953 » Dec 09, 2018, 10:27 am

[quote]Barry, did you need a special tool to remove the fan assembly.

[/quote][quote="BarryR"]After years of looking at my cardboard-box chimney and thinking it was the weak point of my set-up, I wandered around Home Depot for a while looking for a better solution. My goal was to connect the back of the Hottop to 4" flexible dryer ducting and up to my range vent hood.

Last weekend, I succeeded.
[b]AFTER[/b]
[i]<image>[/i]

[b]BEFORE[/b]
[i]<image>[/i]
I wanted it to be quickly removable and not require any permanent modification to the Hottop.

I came up with something that works surprisingly well and requires no cutting or drilling.
I discovered that a toilet flange is perfect for this and the ones at Home Depot are black!
Furthermore, they have a slot which allowed me to easily create a bayonet-like attachment.
They come in a view varieties. Find the one that allows your venting to slide snugly over it.
Once you have the supplies, it should take less than 30 minutes to do.

[i]<image>[/i]
Barry, did you need a special tool to remove the fan assembly.


Here's what you need to do:
1) Remove the rear fan assembly and replace the top two M4 X 30mm machine screws with small lockwasher and M4 X 45mm screws (I had 50mm so they stick out more than I'd like - I'm waiting for 45s and some M4 flange nuts ordered off ebay for a neater job). Make them very snug so they don't loosen when you start tightening things on the other end which will tend to turn these screws CCW.
Reassemble. You will now have two screws sticking out the back of the Hottop.

2) Place a couple small lockwashers (M4 or similar so they just fit over the screws) on these screws and then a 1/4" X 3/8" OD X .171 ID nylon spacer. Now put another lockwasher followed by a #8 washer then an M8 washer. The M8 washer is the perfect size to fit through the largest opening in the toilet flange and the spacers fit perfectly in the groove. If you can find a fender washer with the same OD as the M8 washer but much smaller ID then you might not need the #8 washer. Next put another #8 washer followed by a lockwasher, then an M4 nut. You may find hardware that's slightly different but the key is that the fan screws are M4, an M8 washer is the perfect OD to just fit through the largest gap in the flange and the spacers fit right inside the groove in the flange. The small lockwashers help keep everything snug and allow for fine-tuning to get the perfect gap between the roaster and the M8 washer.
[i]<image>[/i]

3) All that's left to do is to slide the venting over the flange. I used venting with collars as they fit right over the flange. I decided to secure the venting to the flange with vent tape.
[i]<image>[/i]

At the other end, I used vent tape to secure a small stainless steel hook which keeps it in place on my range vent. I also wanted to vent tape to smooth out some of the rough/sharp edges.
[i]<image>[/i]

To attach the vent assembly to the Hottop, line up 2 of the large square openings on the flange with the 2 washers on the Hottop and turn the flange as far counter-clockwise as it'll go. To remove it turn it clockwise.

[i]<image>[/i]
If you want a solution that doesn't allow for instant removal then you can replace all four M4 screws instead of just the top two. Then use the four holes in the flange rather than the slots. Drill the holes in the toilet flange a little larger so they all match up with the four screws (40 mm length screws might work). Then use a small lockwasher and whatever washers and M4 wingnut, M4 regular nut or M4 flange nut you need to secure all 4 points.

Obviously, this can be modified for different specific venting needs. The key is that the flange is almost perfect for this.
When I'm not using it, it hangs on a little hook in the basement.

Everything's available at Home Depot that's needed. Total cost is <$20. They don't have 45mm M4 screws and they may not have M4 flange nuts but as described above, those are optional; the stainless steel hook didn't come from there either. To make sure everything fit right, I took the rear fan cover to Home Depot with me and semi-assembled everything there. I roasted today and it worked great. Despite only being attached at the top of the fan, no smoke leaked and there's little play.[/quote]

BarryR

Postby BarryR » Dec 09, 2018, 10:42 am

No special tools needed.
Hottopusa.com has all kinds of directions for repairs and disassembly but basically, you remove the 4 Phillips screws which attach the fan assembly to the roaster. The unattach the fan cord carefully. Now you can remove the whole assembly and get to the Phillips screws on the back of the assembly.

This is a good time to clean the fan. Just remember which way the fan blows when you put it back (I think the label faces the back of the roaster.