Grundfos Selectric and re-filling Question

[loffler]

I have searched but cannot find an answer anywhere, so either not searching properly or hasn't been asked before (doubtful) Anyway, sorry if this is a repeat.
I need help with my pump when re-filling my system.
I have a primatic system and have just drained the system to change 3 rads. All went smooth until re-filling - filled the downstairs OK, but the rads upstairs wouldn't fill and I put the down to the pump not letting water through.
Is this the case and if so, how do I get the water to fill the upstairs radiators with the pump in place?
Is there a bypass valve on it somewhere??

Any help would be appreciated - let me know if you need more info.
Thanks

 

[Slugbabydotcom]

I put the down to the pump not letting water through.

What if the gate in one of the valves snapped off when you were trying to re-open it?
Did you indeed remember to open the isolation valves?
Is there a manual air vent there that needs bleeding?

 

[ChrisR]

Opened the motorised valve(s) manually?

 

[loffler]

Im pretty sure nothing broke when opening and closing as there was no resistance in any gates or valves.

I think it is probably the manual valve suggestion but have no idea how to do this on this pump. I can bleed it with the large screw in the middle, but the only other thing I can find is a switch on the side for flow speed - no manual option.
Any more suggestions??

 

[namsag]

Its airlocked up so you could try draining again and start refilling or turn pump on and off a few times to see if that shifts it.

 

[loffler]

I tried turning the system on for a while and got a huge bubble in the cictern in loft. All the rads then filled OK.
I left it overnight to settle and turned eveything on the next day. The heating worked and water gets hot. At first I though it had not worked as there was a brown tint to the DHW, but seems to have settled down now and is running clear.
Is this just because its been drained and is clear water or have I been lucky and the bubble has reappeared correctly? Will the water stay clear or will it turn brown again over time??
At first impressions, seems to have worked but am not 100% convinced!
Thanks

 

[sooey]

All sounds ok, the dirty h/w is normal because you've disturbed the sediment in the bottom of the tank, it should clear up after a few hours.