Problem with Central Heating since changing programmer

dbcohen · 2004-12-31T01:24:29+00:00

I have a problem with my heating system since I changed the programmer.The system is a 28-year old open vented gravity HW system, with apumped CH system as well.My Randall 3060 packed up over Christmas - Bug number 1 started movinginstead of switching the heating on, until it jammed up against bugnumber 2.Anyway, I decided to replace it with a more modern 5/2 digitalprogrammer - a trip to B&Q Warehouse revealed that a Sunvic Select207XL was a suitable replacement unit for the Randall 3060.Sunvic fitting guide listed the wired terminals from the Randall's MK3plate that should be disconnected and reconnected to the Sunivcwallplate - Basically, I ended up with three neutral wires to terminalN, a live wire to terminal L, and a HW and CH on wire to terminals 3 &4. Dip switches on the programmer were set to Gravity, 5/2 dayprogramming and three time periods.This left me with some wires left over - a red/black combo that werewired into the same terminal on the Randall, and three earth wires. Foreach set, I have taped them together with insulating tape and bent themout of the way for now.However, I can only get the hot water to come on. This warms up two ofthe three upstairs radiators as well (I think I have an antigraviyvalve missing in my system!), but downstairs is very frosty.Pump is not spinning up, from what I can see. Clearly it is not wiredright, but having followed the Sunvic instructions I am unsure what todo next.Does anyone else have experience with this set up?

Dec 31, 2004 20 Replies

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IMPYtalktalk.net.2k2qxd 19 years ago

I THINK YOU WILL FIND IF YOU PUT THE OTHER SPARE WAY INTO HW ON ALL YOUR PROBLEMS WILL BE SOLVED PLEASE REPLY IF IT DOESNT AND WE WIL GET IT RIGHT CHEERS IMPY BECAUSE IF U HAVE CONNECTED THE SPAR DIRECTLY TO 230V YOU WILL GET CONSTANT HEATING AS IT ISNT SWITCHABLE AGAIN PLEASE LET ME KNOW THE OUTCOME AS I WOULD LIKE TO KNO

-- snipped-for-privacy@talktalk.net

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Problem with Central Heating since changing programmer

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