Extended 1930s Semi.
1970s heating
Gravity HW/Pumped CH (microbore).
Potterton Profile boiler
I've modified it to a "C-Plan" (valve is not blocking F&E pipe) wired to allow the HW and CH to retain their separate setpoints.
The Pump is located in the floor cavity in the room immediately above the boiler.
The system was treated with Fernox F3 and flushed about a month ago. A lot of sludge was removed. Inhibitor added -the water has stayed clean.
The old pump (15-50) failed last week, so I replaced it with a UPS 15-60. I balanced the rads and set the pump to speed 2. There was a lot of air noise near the pump, so I reduced the speed to 1. The noise was reduced.The rads are still heating up and the system is performing far better than it has since we've lived here.
Unfortunately, the radiator closest to the pump fills with air very quickly and the radiator in the downstairs hallway makes gushing/air noises.
I'm assuming that the pump is scavenging water too quickly from the boiler and drawing in air. The pump location may not be ideal and I would be happy to move it.
I unblocked the supply pipe from the F&E tank about 18months ago (when we moved in). I noticed this morning that the 'vent' pipe upstairs was warm, but the larger (28mm) flow pipe wasn't.
Any suggestions?
Cheers.
1970s heating
Gravity HW/Pumped CH (microbore).
Potterton Profile boiler
I've modified it to a "C-Plan" (valve is not blocking F&E pipe) wired to allow the HW and CH to retain their separate setpoints.
The Pump is located in the floor cavity in the room immediately above the boiler.
The system was treated with Fernox F3 and flushed about a month ago. A lot of sludge was removed. Inhibitor added -the water has stayed clean.
The old pump (15-50) failed last week, so I replaced it with a UPS 15-60. I balanced the rads and set the pump to speed 2. There was a lot of air noise near the pump, so I reduced the speed to 1. The noise was reduced.The rads are still heating up and the system is performing far better than it has since we've lived here.
Unfortunately, the radiator closest to the pump fills with air very quickly and the radiator in the downstairs hallway makes gushing/air noises.
I'm assuming that the pump is scavenging water too quickly from the boiler and drawing in air. The pump location may not be ideal and I would be happy to move it.
I unblocked the supply pipe from the F&E tank about 18months ago (when we moved in). I noticed this morning that the 'vent' pipe upstairs was warm, but the larger (28mm) flow pipe wasn't.
Any suggestions?
Cheers.