Buderus GB142/60 not firing for heating call
System:
Buderus GB142/60
Buderus indirect tank
4 Grundfos circulators
Taco control box for standard thermostats
Have system pics if helpful
Symptoms:
When a call for heat comes it does not fire the burner
Turn up the hot water temperature and it will fire and run and apparently continue on until the end of call for heat.
Ideas?
Located Metro West 495 area. He has been having some problems getting service if anyone is interested. It does not leak and has been reasonably reliable thusfar.
Comments
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Pretty well narrows it down to the control box… or the wiring associated with it.
Do any of the circulators turn on when the associated thermostat is calling for heat?
Really have to look at how the particular installation is wired to see where the signal from the thermostat isn't getting passed along. There are a LOT of different ways to wire these things.
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
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Is it showing any error/fault codes on the display?
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Sorry, for some reason my comment did not show up even when I refreshed the browser, and I gave up looking.
I did not see a separate AM10 control. This is not happening now, it is happening in cold weather
I do not believe there are error codes
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Check the set points in the AM10 and the temperature sensors are in range….
There was an error rendering this rich post.
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are you in warm weather shut down? You may want to check what you have that set for
Tom
Montpelier Vt0 -
The circulators do run
I am going check with him on more specifics
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Some pics of the install
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On a call for heat the wall relay will turn on the zone circulator and the end switch in the relay is wired to the AM10 to signal a call for heat… The AM10 control which is a outdoor reset signals the boiler what temperature to supply to heating zones …
Simple 6 wire connection. .. Two to the boiler , two for the sensor and two for thermostat or end switch …
The AM10 is obsolete and not available anymore … You can wire in a Tekmar with a supply sensor ..
There was an error rendering this rich post.
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