Todays fun

[kyle]

Hi all,
Just wondered how many people knew about performing an 'ambient air assessment'.
I came across this with my engineer today, never heard anything about this in college.
We had readings of between 80 and 150ppm every min, appliance was ID.

 

[GrahamM]

More info please.
What appliance, what was the scenario?
How were his readings taken and what equipment was he using?

I thought you had to have a CMDDA1 qualification and equipment to be qualified to give a judgement on surrounding air quality. A FGA will give an indication that this may be required.

 

[Dannypipe]

Yeah I know about it, but have never done one. I think my Kane 455 will do one. I'm frankly fed up with the constant stream of new legislation, why can't we just be allowed to do our job?

 

[kyle]

Hi,
Well it was a landlords check, Glow-worm fuelsaver 30b mk 2 in kitchen. This was natural draught room sealed and was 310 mm away from an openable window ( to the sde ), should have been a minimum of 400mm from side. Section 8.4 in the GIUSP outlines the requirements. My engineer wasn't entirely sure so checked with someone who knew the procedure. Basically he had to open the window, operate the boiler at full rate ( 10.99kw) and take readings of CO every minute for a total of 15 minutes. The maximum allowable CO reading should be 10ppm. We had readings from 80 to 150ppm. This was classed as ID. He stuck the probe in the natural draught terminal just out of curiosity and the analyser ( one click ) displayed HIGH for the next 3 hours and wouldn't turn off..its working ok now ( Think the ratio reading was .0456 just before it packed in).
So thats it really, I take it that its not a common occurance?

 

[Dannypipe]

No it's not common practise. Sounds like a pain in the backside.

 

[CMairiD]

I thought you had to have a CMDDA1 qualification and equipment to be qualified to give a judgement on surrounding air quality. A FGA will give an indication that this may be required.

Last I heard, they had developed the CMDDA1 assessment but it hadn't gone through UKAS accreditation yet.

Frankly, I think it's a load of tosh. CMDDA1 should be a part of CPA1. Just feels like another excuse to take money out of our pockets.

 

[CMairiD]

Basically he had to open the window, operate the boiler at full rate ( 10.99kw) and take readings of CO every minute for a total of 15 minutes. The maximum allowable CO reading should be 10ppm. We had readings from 80 to 150ppm. This was classed as ID.

From what I've read in BS7967 and some training during an ambient air testing toolbox talk, you need turn off all fuel burning appliances and ventilate until inside CO level reaches that of outside. Then close all doors, windows and ventilation (appliances still off) and check that there is no build up of CO during 15 minute period. If no CO, carry on with testing one appliance at a time. If the CO levels ever reach above 30ppm (except cookers), then you need to terminate the test immediately, ventilate and evacuate until CO reaches a safe level.

 

[kirkgas]

From what I've read in BS7967 and some training during an ambient air testing toolbox talk, you need turn off all fuel burning appliances and ventilate until inside CO level reaches that of outside. Then close all doors, windows and ventilation (appliances still off) and check that there is no build up of CO during 15 minute period. If no CO, carry on with testing one appliance at a time. If the CO levels ever reach above 30ppm (except cookers), then you need to terminate the test immediately, ventilate and evacuate until CO reaches a safe level.

exactly the correct procedure, anyone who subjects themselves to readings of 150ppm is mental, I know people slag CPA1 but this is covered in the training, prob the only interesting bit TBH

 

[Dannypipe]

This is covered in training!! HA. I wish you worked in the south east kirk and not scotland. This was briefly mentioned in the training and does it come up in the exams? Er no.

What a crock of ****. It actually makes me angry.

 

[Billy Bob Bob]

what a load of rubbish tell your "engineer" to have a re think and be a proper engineer the ponce

 

[Dannypipe]

Love it Gas Man....my view entirely.

 

[Toddyplumb]

So then : the terminal was too close 2 the window : NCS , AR or ID ?
GAS rate was ? Burner pressure was ?
Do you need 2 go futher ?
8ppm ................

Kane 455 can do up to 30 min test and give /print result for every minute

Kyle 2 days 2 dodgy jobs , where r u at ?

 

[Toddyplumb]

Gas man I am reporting u 2 the moderator 4 saying arse ! WE cant have ball cocks then we cant say Bottom !

 

[kyle]

Firstly, My engineer decided to tell this particular source of work ( letting agent ) that he no longer wanted any more work from him. All he got from this agent was tight fisted landlord properties.
As for the procedure, this was followed as per BS7967, I did say 'basically' in orig post.
As for subjecting ourselves to levels of CO, Once the engineer hit 80 during the first minute we both left the room, analyser still working on its own, nipped in to check the reading after second minute etc etc. The burner pressure etc were obviously checked and heat exchanger inspected.
The engineer expressed his concerns for the ageing appliance (there were 3 kids at the address) and wanted no part in an old, tin can of a boiler that was obviously in need of replacement. He had no hesitation in ID the appliance straightaway, cut n capped, labelled, paperwork etc etc.....He wanted no part in trying to revive this particular appliance.

 

[Toddyplumb]

In previous posts , it has been said that on older appliances after burner , pressure and rating there is no need to use FGA .
You do get some LL like that Kyle