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If your one-year-old hydro air system lost antifreeze and the plumber refilled it but now you have no heat in 2-3 zones how do you use the pump to bleed the system?
Wiki User
∙ 8y ago
The most probable trouble is an air in the system. There should be the Air Vents (check out if the plastics caps are removed) somewhere on the boiler. There is also a vent on the top of the water extension tank. Air heat exchangers have radiators which have an air removal points. Every system is different. In my case I had to use an external pump to start the second floor zone (a lot of air and the boiler pump could not do the job). I bought the Utility Pump in the Home Depot ($82, 1/12 H).
It had in and outs for the regular washer machine hoses. In my case I connected "in" to the incoming vent connector and "out" to the drain vent. Then I turn off the incoming switch. The basic idea was to bypass the existing pump and make the same flow direction for the external pump. In my case external had twice more horse power (1/12) then the internal one (1/25). Do not forget to turn everything off for the boiler and manually open zone valves.
Wiki User
∙ 8y ago
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