Light Commercial Boiler Reviews

[mutley racers]

You have had the best of me mutley, bleed me dry you have, if you can't do it now there is no hope LOL.

I really am going to miss those water regs quotes. I believe you gave me your email so there is no hiding from me. I am not ready to go it alone yet!

Sounds like a great New challenge for you there. All the best a

 

[happyflyer]

He will still keep in touch I have no doubt good luck in the new learning curve, Chris can't you keep your hand in at weekends
doing odd plumbing jobs :yawn:

 

[Ermintrude]

He will still keep in touch I have no doubt good luck in the new learning curve, Chris can't you keep your hand in at weekends
doing odd plumbing jobs :yawn:

Loads of family jobs and unblocking toilets with love?

 

[tm plumbing]

Getting thread back on track, so I've been given the job so looking forward to this one.
ive specd it up on 2 Worcester CDI 30kw system boilers with 2 unvented 250L solar cylinders (solar added at a later date) I'm going with the plate heat exchanger to separate the existing heating from the sealed new side which will heat the cylinders & the PHE on a sealed system using the boilers (swep B28 or B56 I'm looking at, anyone used them ?) internal pumps. The heating pump is staying (large Wilo) & will be connected to the O/Vside of the PHE. I'll be power flushing the 3 heating zones & running a magnacleanse. So I'm hoping once the existing setup is flushed / treated I should be able to connect the heat exchanger onto the pump & set up the wiring. Any advice on the wiring regarding relays etc much appreciated. Existing zone valves are 1"1/4, 1"1/2 & 2" iron connections & I'd like to be able to control each zone individually.
The only thing nagging me now is going unvented on the hot water, I'm replacing a horizontal calorofier with the 2 cylinders picking up the secondary return, again bit concerned about the pressure so still might leave the h/ water vented.
Comments welcome
Trev

 

[Whyme]

go unvented bet diamonds it'll be fine. wiring dunno. looks like a decent set up though.. Btw wheres chris..

 

[tm plumbing]

Well the price of the plate heat exchanger may have to change the design on this as it's silly money.
i might go with the low loss header as an option but want to keep the existing heating open vent.
Can I keep the primary side sealed and circuit side o/v ? Anyone done similar.

 

[Ermintrude]

You can make your own hex for £300

You need 225 and 3/4 barrel welder. Cut 225 at 1800mm long. Weld 2" ports on 225 for ov to tie in one top and one bottom use it like LLH Get two plates 225 clap together and drill 1/2 holes in them. One center and think 6 surrounding it. Get 3/4 welded between them so water will flow from one plate to next via tubes. Get 5 baffles welded on along its length - just for turbulence in secondary water.

Plates need to fit snug on to 225 now weld up end caps so 225 tube is tight . Make two ends hats for it , 225 tube and flanged end caps tee in 35mm near flange. 35 is for boilers. Set top or bottom as flow depending on if you want constant temp . Try and fabricate a cone onto flange plate to act as turbolator in flow feild.

 

[Ermintrude]

http://www.seekcg.com/pdf_files/LowLoss_HydronicHdrs.pdf

 

[mutley racers]

how can you tell if a boiler is commercial or not? this one...Potterton Gold 65kw high output boiler & flue - Mr Central Heating says it is for larger houses. But says nothing about being commercial.

 

[Ermintrude]

It's less than 75kw. Gas carcas less than 35mm and within volume? It's domestic other than If it's in a plant room. But u can fit domestic boiler on commercial gas if there is ISo valve on your leg. U don't need a test point as u can do a TT using the test point on the gas valve for inlet pressure.