Honeywell Power Humidifier: Furnace Humidifier/ Humidifier
Problem for Honeywell Power Humidifier: Furnace Humidifier/ Humidifier

Chronotherm Three thermostat vs Buderus Logamatic Computer.




By pzeh on Sep 28, 2009

" "
My home has two zones, both using Honeywell Chronotherm Three thermostats, model T8602A, for an oil fired boiler with forced hot water base board heating. They have worked well for years with my 37 year old boiler. Recently I installed a Buderus system with a Logimatic computer module which has an outdoor temperature sensor. With the thermostats set for "Adaptive Intelligent Recovery", the old boiler would kick on like clockwork @ one hour before we wanted the temp to go from 60 to 65. Now with the new Buderus system with it's outside thermostat and logimatic computer, it seems to be kicking on the boiler two to three hours before I want the heat to go from 60-65. to heat the baseboards. I'm wondering if I have too many computers trying to run the whole system. So my basic question is: can the Chronotherm Adaptive Intelligent Recovery system work correctly with the Logimatic computer on the boiler, as both seem to try to adjust for room/or outside temperatures. Thanks, Part Time Pete

Clarification Request

Posted by ASK HANK on Sep 29, 2009

how long did you let it run? the AIR takes days to properly adjust and if you over ride it it starts over

Best Solution

posted on Oct 01, 2009
Very Helpful)

fourniershva

Rank: Guru 
Rating: 92%, 77 votes
The outdoor thermostat senses the the temp of the outside air, and adjust the boiler water temp according to what it knows is best. The reason that the boiler is running longer is the old boiler used to be constantly sending 180ish degree water to the baseboard, now that water may only be 140ish degrees. The idea behind this is to reduce off cycle heat loss, as the greater the temp difference between the air temp and water temp, the quicker you loss heat. The theory in boiler run time is this, the less times it starts and stops, and the long run times will give you the best efficiency. Hope this answers you questions.
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