Hi Folks,
Have just had a new central heating system installed comprising :-
New combi boiler - Bosch Worcester 37 CDi,
new radiators,
new TRVs
new pipework (15mm copper replacing 8mm microbore).
The property is unoccupied whilst we refurbish it, although we're there most evenings and weekends.
Existing pipework was retained for cold water supply to boiler & domestic hot water. System was supplied and installed by a GasSafe plumber from an approved Bosch agent (a long established local business).
System pressure has remained constant for about 2 weeks - the system was bled and re-pressurised the day after installation / commissioning.
System works fine when the central heating is on (ie at times when the central heating clock is set to activate the central heating).
However if we run the hot water tap outwith these times (ie CH off) the water runs cold. The "Burner on indicator light" illuminates momentarily then goes out (for about 45 secs?) after this happens four times the boiler displays fault code "EA" ("Flame not detected") and the fault and mains power (blue) lights flash.
Reseting the boiler clears the error but the error returns if we run the hotwater. If we "Advance" the central heating clock (ie turn CH on) then boiler goes through a slow start warm-up (-!!- and XX (temp) alternate) for about 15 minutes (Bosch manual says this is to fill the condensate trap?). Then central heating and hotwater then both work OK.
Supplier has sent the plumber out a number of times and reports that the pressures and tempeartures are all ok and it's an air lock caused by the fact it's a a new system and the chemicals they put in. I think it's a boiler / install fault and the chemicals should only be in the CH system (would turning on central heating clear an air lock in DHW supply?).
This has been going on for 2 weeks and we haven't accepted the system (or received their bill) yet but we are getting exasperated and feel like taking the whole lot out and dropping it on their doorstep.
Can anyone advise what we should do eg persevere with the supplier or try contacting Bosch direct. Finally does anyone have any ideas as to what could be causing the problem?
THANKS
Have just had a new central heating system installed comprising :-
New combi boiler - Bosch Worcester 37 CDi,
new radiators,
new TRVs
new pipework (15mm copper replacing 8mm microbore).
The property is unoccupied whilst we refurbish it, although we're there most evenings and weekends.
Existing pipework was retained for cold water supply to boiler & domestic hot water. System was supplied and installed by a GasSafe plumber from an approved Bosch agent (a long established local business).
System pressure has remained constant for about 2 weeks - the system was bled and re-pressurised the day after installation / commissioning.
System works fine when the central heating is on (ie at times when the central heating clock is set to activate the central heating).
However if we run the hot water tap outwith these times (ie CH off) the water runs cold. The "Burner on indicator light" illuminates momentarily then goes out (for about 45 secs?) after this happens four times the boiler displays fault code "EA" ("Flame not detected") and the fault and mains power (blue) lights flash.
Reseting the boiler clears the error but the error returns if we run the hotwater. If we "Advance" the central heating clock (ie turn CH on) then boiler goes through a slow start warm-up (-!!- and XX (temp) alternate) for about 15 minutes (Bosch manual says this is to fill the condensate trap?). Then central heating and hotwater then both work OK.
Supplier has sent the plumber out a number of times and reports that the pressures and tempeartures are all ok and it's an air lock caused by the fact it's a a new system and the chemicals they put in. I think it's a boiler / install fault and the chemicals should only be in the CH system (would turning on central heating clear an air lock in DHW supply?).
This has been going on for 2 weeks and we haven't accepted the system (or received their bill) yet but we are getting exasperated and feel like taking the whole lot out and dropping it on their doorstep.
Can anyone advise what we should do eg persevere with the supplier or try contacting Bosch direct. Finally does anyone have any ideas as to what could be causing the problem?
THANKS