A cake slice also works to clean between the heat transfer coils. I personally use a garden sprayer to clean the hex's. Also if you're replace the burner gasket. It's a good idea to use this cardboard packaging to protect the rear insulation panel. Excellent tutorial Derek 👍
Good video for new recruits and to all those who only probe. If a Manufacturer is asking you to only probe then is that correct? You still have to take the burner out to check the flame and ignition probe and check the condition of insulation so why not clean the H.E.
Hi Derek, great video do you have a link to the brush and drill extension,or advice on where to buy them. I have searched on Google but unfortunatlt not found any
I tried one of those brushes - unfortunately it's impregnated with Silicon Carbide grit. Luckily I noticed it was scratching the stainless steel and promptly stopped using it. Interestingly Viessmann sell a metal brush to clean in between the coils only. I now have this tool.
You did a fantastic job considering you only spent a couple of minutes. Are most heat exchangers stainless steel? Also, I guess you’d refer to manufacturers instructions regardless before cleaning any heat exchanger? Thanks Derek👍🏻. Top video. Asian Jon. Training.
If the heat insulation panel is cracked or damaged is it an absolute nightmare to replace ie full heat exchanger out and everything else infront of it? Or does it just pop straight out and a new one in.
There are two levels of service, the legal minimum where engineers clean the condensate and take a flue analysis, if its good, they are good, if its not good then they will do what is termed a full strip down service.
Please don’t use drill attached brushes to clean the stainless steel heat exchanger, it really gets to me and I cannot stand it, I work for a manufacturer and it says nothing about that in the MI’s so I have no idea where people are getting this from. Infact rather than cleaning the hex you are actually destroying it by removing the heat treated coating which contains chronium which is the element that stops the ferrous iron rusting through. When people do this it accelerates intergranular corrosion and the ferrous iron balls build up and the outside of the heat exchanger which have leach out of the stainless steel. Which I turn destroys the hex and turns the trap orange. Sorry about the rant.
Yep , Its no no on Viessmann boilers to use brushes at all . Vacuuming and clearing the path between the coils makes sense only with the correct tool , why do you want a shiny exchanger it is not improving performance.
Viessmann 100-W " Please note Scratches to the surfaces of the heat exchanger that come into contact with hot gas can result in corrosion damage. Brushing can cause deposits to become lodged in the gaps between the coils. Never use brushes to clean the heating surfaces. " &" Note Discolouration on the heat exchanger surface is a normal sign of use. It has no bearing on the function and service life of the heat exchanger. The use of chemical cleaning agents is not required. "
Typically, the plastic is just the carrier for the same grains as in normal sandpaper. So, you just sanding down the surface , removing the protective oxide layer
