Search results

I had the same problem after I fitted new washing machine hoses a couple of years ago. I then fitted double check valves between the copper pipes and washing machine hoses and the problem was gone.

What made me think they are non standard files is the fact that I have not been able to find a program to open them apart from the supplied one. I've tried VLC, Nero showtime, Aimersoft ultimate video convertor etc etc. These programs usually open HD MPEG4 files ok I tried the Samsung SCO...

Thanks for the reply, it has four bit rate settings and I've already got it set on the highest quality setting. It seems to me that the DVR is using a poor compression algorithm which is very lossy. The files are saved as .264 files which so far I have only been able to open with the supplied...

I bought a no name chinese DVR based on the high spec and the assumption all D1 25fps/ channel recordings would be roughly the same regardless of machine. The DVR has plenty of features and works well except for the fact that the recordings are so poor that they look as though someone has...

Yes I have the CM927 controlling in the nursery and several CM67ng's controlling the other zones on a 8 zone CM zone system. The minimum cycle rate is 3/ hr which the CM927 will always use when close to the set-point (+ or-). Setting the minimum on time to 5 minutes was not the answer in my...

I spent two winters trying various settings to get rid of the cycling, even using a data logger monitoring room temperature and rad inlet pipe temperature to see what was going on. The settings didn't give me a satisfactory solution but I ended up fitting a Broyce M1EDK variable timer relay...

I know that they are supposed to within certain valve travels. The travels listed are from the 30mm thread to the top of the pin AFAIK. The pin on the drayton valves is too long in relation to the top of the 30mm thread and falls outside the honeywell spec. This means with the HR80 at the fully...

The 927 does work with the HR80/ HC60 setup but the instructions for setting them up together are very sketchy. Here's how I set mine up (from memory).... Set the 927 to use ext control temp sensor ie HR80 (and just display room temp on 927 if you want). ie.Set Parameter 8 to 1 or 4) Do a...

Something is not right. Loss of power shouldn't mean re-binding is necessary. eg. The CM-Zone installer pack comes pre- bound in the box without power to any of the components. My system... 1 x CM67z , 1 x CM927, 8 x HR80's and 1 x HC60NG all pick up where they left off after a power...

No, modulation range was the wrong choice of words for the on- off room stat. I was referring to the proportional bandwidth of the stat or the hysteresis between the on and off temps. I have the boiler range rated to 13KW max useful output on the CH circuit. I'm not sure what the minimum is...

It has reduced boiler cycling on my system, but fine tuning of which compensation curve is used should reduce it even more. IMO a well matched compensation curve should almost eliminate boiler cycling ie. when the CH flow temp is just sufficient to keep the room temp in the middle of the on- off...

Yes, the Honeywell is self adaptive, thats why I thought it might not cope with the boiler also adapting to suit the prevailing weather. They may well work together I'm just not sure. Dave

Yes, the connections for the on-off room stat are separate to the weather comp. I've used a Honeywell CM927 programmable room stat. The CM927 uses its own outside temp probe to give the optimum start facility mentioned earlier in the thread. I have not enabled optimum start though as I think it...

No, it has several different compensation curves where x/y = outside temp/ CH temp. You select a curve during programming and then the boiler follows that.

The Biasi service (or installation manual?) has resistance v temp graphs for the two sensors and both graphs are the same.

Yes of course it will work inside without reversing the compensation, thanks for correcting me. :oops: External compensation will still give more stable temps with less cycling of the boiler.

For the Biasi I later found the Honeywell WC sensor has the same resistance curve but the cost is more. The user selectable weather compensation curves in the Biasi all have a positive gradient so you would need to find a PTC with the same resistance curve (reversed) to use indoors. I think...

It's just a screw in, stainless steel bodied, temp sensor about 14mm dia and 20mm long. I soldered 3amp flex to the spades and insulated them with heatshrink. The flex is fed through a hole in a northerly facing wall in a place not in direct sunlight and the sensor body is secured in the hole...

NTC: A type of Thermistor based temp sensor. NTC's: more than one of same see http://www.thermometrics.com/assets/images/ntcnotes.pdf Dave

I fitted an external WC sensor to my Biasi M110 combi. I couldn't locate a Biasi sensor and rang Biasi technical who at first told me Biasi's didn't support this feature and asked why I wanted to use it. They then said weather compensation is only of use in countries like Sweden. :shock...