I would be grateful if someone who understands these things could help with a question about the setting for a Honeywell DU145 ABV.
The pump details are Grundfos UPM3 15-75 with a water flow of 15.2l/min/910l/h at T20C with a permissible resistance of 25kPa/250mbar. The pump max has been set on high as I have 19 radiators.
The boiler sits 4 feet below the landing; the 22mm plastic piping is 31ft from boiler to ABV. TDH = 1.46 Metres( my calculation?)
I ask because I am getting some gurgling from one radiator on first opening (even with other valves already open). The ABV is currently set on 2.5 but even with radiators open, there is some bypass in operation.
I appreciate that there is a 'hands on' way of setting the ABV but it would be nice to know what the theoretical ABV setting should be.
Thanks.
The pump details are Grundfos UPM3 15-75 with a water flow of 15.2l/min/910l/h at T20C with a permissible resistance of 25kPa/250mbar. The pump max has been set on high as I have 19 radiators.
The boiler sits 4 feet below the landing; the 22mm plastic piping is 31ft from boiler to ABV. TDH = 1.46 Metres( my calculation?)
I ask because I am getting some gurgling from one radiator on first opening (even with other valves already open). The ABV is currently set on 2.5 but even with radiators open, there is some bypass in operation.
I appreciate that there is a 'hands on' way of setting the ABV but it would be nice to know what the theoretical ABV setting should be.
Thanks.
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