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DH in Carolina 01-03-2013 07:59:36 173.212.6.174 Report to Moderator	Need a little more information. Do you have seperate thermostats for each zone? Are you using the same circulator pump for each boiler? The way I see this system operating is: On a call for heat a zone thermostat turns opens a zone valve and turns on the circulator pump. A drop in water temp in the boiler causes the aquastat to turn the burner on and raise the water temp in the system. You do not want to break the FF terminals as this will cause the burner control to trip out and have to be reset each time you want to run the oil burner. You can break the TT terminals and the burner will not run. You can get a 2 stage thermostat and let the wood boiler be the first stage of heat and the oil boiler be 2nd stage heat. Wood boiler will heat until fire goes out and a drop in temp in house will turn on oil boiler. [Reply]   [No Email]
JOB 01-03-2013 10:05:54 74.36.134.248 Report to Moderator	Re: Oil burner gun question in reply to DH in Carolina, 01-03-2013 07:59:36   Yes there are separate thermostats for each zone. and yes there is one circulating pump for the entire system. The way I have it plumbed now there are two pumps and that system does not work like it should. That's why I would like to re-plumb and re-wire it. I forgot or did not think about the aquastat being the high and low limit in turning the burner off and on. "You can break the TT terminals and the burner will not run". I am not sure I understand what you said about breaking the TT terminals. Maybe I should control the power to the high and low limit aquastat to prevent the burner from firing. So if I go away I can turn the power on the high and low limit aquastat. And if I am home have the power off and if I forget to stoke the fire the gun will not fire and I can build another fire to get the house back to temperature. And for get about my dumb idea of messing with the TT terminals. [Reply]  [No Email]
DH in Carolina 01-03-2013 11:47:42 173.212.6.174 Report to Moderator	Re: Oil burner gun question in reply to JOB, 01-03-2013 10:05:54   Don't know the type of burner control you have on your oil burner but a Honeywell 8184G is very common. The two F terminals go to the cad cell as you know but the two T terminals are the 24 volts that control the burner relay. By putting a switch on one wire going to the T terminals the burner will not operate when the switch is open. [Reply]  [No Email]
JOB 01-03-2013 13:38:07 74.36.134.248 Report to Moderator	Re: Oil burner gun question in reply to DH in Carolina, 01-03-2013 11:47:42   The control I have is a R8182E, the control is built around the aquastat. I can see where there is two wires going to the aquastat. If a switch is put on one of the TT terminals will the circulating pump work and the zone valve open? [Reply]  [No Email]
DH in Carolina 01-03-2013 15:54:13 173.212.6.174 Report to Moderator	Re: Oil burner gun question in reply to JOB, 01-03-2013 13:38:07   After looking at a electrical diagram for the R8182E if one of the T wires is broken the pump will not operate with the zone controllers. Looks as if you open the burner high limit switch the pump will operate and the burner will not. Also you can break the wire on terminal B1 going to the burner (120volts) and the burner will not operate but the pump will run. You would not have to switch any other wires. [Reply]  [No Email]
JOB 01-03-2013 16:40:38 74.36.134.248 Report to Moderator	Re: Oil burner gun question in reply to DH in Carolina, 01-03-2013 15:54:13   If I understand this correctly I can put a switch between the controls and the gun on the B1 terminal and not have to do anything to the cad cell. Or I can put a switch on one of the wires leaving the aquastat. Would that be on the R terminal or the B terminal? Those are the only two terminals that I have access to. [Reply]  [No Email]
DH in Carolina 01-03-2013 17:05:41 173.212.6.174 Report to Moderator	Re: Oil burner gun question in reply to JOB, 01-03-2013 16:40:38   Put your switch on B1 wire going to burner. Thermostat will energize 1K relay and bring pump on through 1K1 relay contact. Cad cell safety may time out and drop out 2K relay after not seeing a flame but the burner will not operate. Will have to reset R8182E when you want the oil burner to operate. Do nothing with R terminal, or TT or FF terminals. [Reply]  [No Email]
JOB 01-03-2013 18:06:12 74.36.134.248 Report to Moderator	Re: Oil burner gun question in reply to DH in Carolina, 01-03-2013 17:05:41   I probably have what you posted above, but I do not understand electrical drawings at all. I was hoping to wire this without having the re-set, trip, but maybe that is not possible with the controls I have. I have been wanting to re-plumb and re-wire this for a couple of years but the electrical has been holding me up. Thanks for typing this slow so I could understand what you were saying. Somewhere I was told I could put a DPST relay in the system but it was not explained how it would work so I did not per sue it. That DPST could be a Honeywell R845A. I do not know what DPST stands for. I should Google that Honeywell number and see if I can make heads or tails out of it. Thanks for the time you spent helping me out. [Reply]  [No Email]