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Gender: Male
Country: United Kingdom
Region: Bedfordshire
Occupation: Heating engineer
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Comments (19)  [ view all comments ]
DP - 7:30 AM on Feb. 27, 2015  reply | message
Thank you. You do show up friendly in the friends list :-))
DP - 7:13 PM on Feb. 26, 2015  reply | message
Hi David. I wonder if you could give me your view regards repair I carried out on a unica for an estate agent. What you say will be in strict confidence- more a case of me being told if I am wrong or some one is making a monkey of me. No names will be mentioned- promise you that. Be blunt to me if you need to.

Agent reports fan bearings are shot (according to tenant who stays there). Rolls up and sets the four speeds to what they should be. All were off the mark. FGA high and low. Both setting out of operational window. Set these. Tenant still bleating fan is noisy buit not noisy as before (cover was off the boiler at the time). Called Vokera techy who said faulty bearing would throw a fault code.

Estate agent claims two weeks after I worked on the boiler, the fan got so wobbly that fan blades broke.

I have copied part of what the 'new' engineer has said- he claims to have replaced the fan
"I have now received comments from the engineer who subsequently attended the boiler at 10 Lothian Gardens. He has advised that the initial problem was due to a worn bearing. He further advises that he considers lubrication or the changing of fan speed settings, which I believe is what you did, to be only ever a temporary measure in these circumstances."

Further more, fan in the unica does not have blades- does the fan disintegrate in the manner sated above? I did not lubricate the bearings has been suggested.

Your view would be most welcome


heatmanuk - 11:15 PM on Jan. 28, 2014  reply | message
heatmanuk 07528723076
vince thanks
DP - 7:38 AM on Jul. 17, 2013  reply | message
Thanks David.
Email is
Other email I gave you previous correspondence is bouncing at present same as gmail account. Must be things are upside down here

For a bit of laughter, read what the link throws up, especially the comments people have posted
bengasman - 11:50 AM on May. 4, 2013  reply | message
If you feel uncomfortable mentioning free courses, I'll be happy to post them as a neutral third party; just send me the details if you want.
terence7556 - 4:00 PM on Nov. 29, 2012  reply | message
hello david you were right, the boiler is 8 yrs old and a new metal section did the trick
thanks for your advice
terence7556 - 3:34 PM on Nov. 28, 2012  reply | message
hi dave can i ask your advice please. should the sabre 29he, 47 094 71 have a metal or plastic flue? got one in an outhouse thats rusty on a metal seam.the replacement i bought is plastic, 29450126,guy at ultimate heating says the metal flue is off a 29se. which is the correct flue?
cheers terry, there are some photos in my profile
glasgowgas - 9:49 PM on Oct. 23, 2012  reply | message
Hi VC, sorry for the impersonal nature of this PM. Attended the Fault Finding training today in Glasgow.......your man in the North, Eric, is a credit to your company,an excellent formal course,plenty of hands on, plenty of hints and tips. Please if you could somehow through the company pass on my regards and thanks again to Eric.

DP - 7:10 AM on Oct. 9, 2012  reply | message
Hi VC,
Can I pick your brains on some boiler issues I have at present. Your insight would minimise me straying off course.

Linea Max . 1. During HW mode, is the bypass operative?
2. Have one on its knees at present. I suggested to client he get Vokera team out to fix ‘leaking to’ CH during HW mode. I had replaced the diverter seal etc to no avail. Now it is shutting down during HW mode to give fluctuating HW. Temperature on the inlet to HWHE is swinging between 55 and 80 degree C. HWHE bunged up me thinks but heat store presence has me confused (question is, do I replace the plate heat exchanger or is it something else).
In figure 2 (Linea Max MI) I see the heat store in series with the HWHE. During long draw off from hot tap, store temperature will be much lower, so will the hot water at the tap not be less hot also?

Linea 24. Another with bunged up plate heat exchanger now with leaking main HE. Replaced main heat exchanger after system was chemically cleaned by plumber who deals with installs. May not have been fully treated as main HE went belly up. Anyhow, main HE fitted. Pressure gauge is jumping a little during HW mode and hot water temperature is again fluctuating.
When fitting thermistor, I have been a little cautious as replacement heat exchangers now have reduced depth where the thermistor fits. To fit thermistor and then torque it tight would, I suspect, puncture the metal as the tip of thermistor is in contact with the plate well before it is tightened. I had to file the tip of the thermistor so it does not damage the new heat exchanger. On others I had to fit two washers instead of one. Am I being overcautious or am I doing something wrong?

Vokera Compact This is the one without plate heat exchanger. Red light comes on but when I get there it works. I suspect it is the HW flow switch. On a previous visit the boiler would not revert to CH after hot tap was run. End of HW demand burner still on, no pump, boiler made some noise and then shut down (overheat shut down me thinks). I will be returning today to fit a new flow sensor today and hope that will resolve the issue. Reed relay within the flow sensor (at least that is what I suspect is used to indicate HW demand) is known to stick at times when magnet no longer in close proximity.

Vokera flue for standard efficiency boilers. Plumbcenter no longer stock this item. Is the flue supply dropped by Plumbcenter or is this item obsolete?

DP - 10:28 PM on Sep. 1, 2012  reply | message
Hi VC, I am looking for vector image of Vokera logo. I need it for business cards that my son is designing. Can you suggest how I might get the said logo?


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