Jrr
New Member
I have trying to get a Logamatic 2107 night setback to work on a BFU controlled mixed circuit on a Boderus G115WS. Instead of setting the temperature back, the boiler just stops firing at the setback time until about 3AM when the boiler temperature has fallen to about 68. I can't believe that the unit isn't defective. At this point I have narrowed it down by setting up the Logamatic simply as follows:
Does anyone see anything that could be wrong with the setting that would cause the boiler to turn off rather than set back by a few degrees?
I've contacted Bosch, but it seems they are stumped and/or haven't found someone who can spot what's wrong.
Thanks,
Robin
- CIRCUIT 1 set to NO-SYSTEM, so that it cannot interfere with the setback (I do have a couple of thermostatically controlled zones but for these experiments I have told the Logamatic that there nothing connected to the higher temperature)
- DHW has been set to AUT, so that it should not kick in during the night setback (or at least not unit the last 30 minutes of the setback period)
- CIRCUIT 2 set to PERIM-HTG, REF TEMP 145, MAX TEMP2 160, REMOTE 2 ON, ROOMCOMP 6, RMSETBACK, OFFSET 0
- Program 2 is set to SENIOR (10PM-5:30AM night setback)
- Boiler: BLDG RESP 1, PUMPLOGIC 104, MAX TEMP 180, FREEZETEMP 41
- BFU2: dial set to 72, and BFU setback switch set to 1 (i.e., 1.8 degrees for this test, so should only set back to 70) and HK set to 2
Does anyone see anything that could be wrong with the setting that would cause the boiler to turn off rather than set back by a few degrees?
I've contacted Bosch, but it seems they are stumped and/or haven't found someone who can spot what's wrong.
Thanks,
Robin