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Hydronic Heat - problem with cycling

Alan(OnVacationInOregon)Forbes
Alan(OnVacationInOregon)Forbes Member Posts: 232
in THE MAIN WALL
probably need an on-site technician to figure out. It could be that there's air in the system or the pump may not be operating properly. If it was something wrong with the zone valves, it would be highly unlikely that they would all have the same symptom.

It could also be that everything is working properly and the boiler is arriving at setpoint much quicker than the heating zone is able to pull the heat out of the piping.

Comments

  • Bob_116
    Bob_116 Member Posts: 1
    Hydronic Heat - problem with cycling

    I have a Raypak boiler system with Indirect Hot water and three heating zones. The water heater and zones have zone valves and one circulating pump. the problem is that the system will come on run for a while and when it hits top end temperature is shuts down. when the temp drops enough the system fires up again. This on/off cycling happens until the zone reaches the required temp or the asked for temp is lowered. I thought it was the zone valve in one of the zones but I tested the three heating zones and they all do the same thing. Before I call the heating contractor would like to have an idea on what the problem might be. If it is the zone valves I have replaced them in the past. Two of the zones have Z one valves as does the water heater. The other zone has an older valve but I can't remember the make. Could it be the circulating pump?

    thanks for any insite you can provide.
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