Boiler return temperature codes
Boiler return temperature codes
(OP)
I'm looking for the specific code reference that condensing boiler manufactures have to abide by to get certification. What code references the return water temperature through condensing boilers. I have some high efficiency condensing boilers that automatically cycle the bypass valves to self calibrate. The problem is that the boilers are rated for return water down to 50 deg F, but the valve cycling full open/close does not maintain the interal water temperature adequately to stop condensation in the primary heat exchanger. The net result is that the interal boiler controls are violating their own operational parameters by allowing the bypass valve which is designed to maintain temps above 130 deg F to allow lower temperatures to hit the primary heat exchanger. The condensate will destroy the primary heat exchangers
In summary............does anyone know the code reference so I can throw it back at the manufacture?
Thank you..........
p.s. No, we can't raise the outgoing temp,nor can we disable the automatic valve calibration.
In summary............does anyone know the code reference so I can throw it back at the manufacture?
Thank you..........
p.s. No, we can't raise the outgoing temp,nor can we disable the automatic valve calibration.





RE: Boiler return temperature codes
there is not Code mandating performance other than ASHRAE
your only choiceisto work with the mfr. by asking their advise.
you may want to add a metering oriffice in the return that way when the bypass opens it will be metered.
ER
RE: Boiler return temperature codes
RE: Boiler return temperature codes
you are asuming their help but as I said you may have to fix it yourself.
ER