changing Indirect H/W Boiler to Cold start

Robert_H

I recently had to replace a boiler aquastat, I replaced it with a Honeywell L7224U1002. The system has an indirect but is set up as a warm start boiler. So I want to switch over to a cold start operation. However, I can't yet because of the wiring of the indirect circulator and indirect Aquastat.
This is a small home that heats primarily with their mini split system so even in the winter time it doesn't make sense for this boiler to always be warm.  Tt definitely doesn't during the summer. 
The the system has single zone valve (it was once a two zone system but one zone has been removed) and a circulator that feeds the zone valve and then independently, a circulator that feeds the the indirect and does not use its own zone valve. The aquastat on the indirect provides L1 to the indirect circulator.
So the boiler is set up as a warm start because there's no call for heat when the indirect needs heat from the boiler. I'm thinking I need to add a switching relay and stop powering the indirect circulator through indirect Aquastat. Is there a simpler "less costly to the homeowner" way to do this. I'm also seeing the single zone valve as useless and just something to break in the middle of the night.

Thanks

Robert

EBEBRATT-Ed

You want the temp control on the indirect to start the indirect circulator and start the boiler.

You want the heating thermostat to start the heating circ and fire the boiler (or the thermostat opens the zone valve and the zone valve end switch pulls in a relay to start the boiler and the heating circ)

2 Honeywell RA832A relays would do it.

You only need an aquastat for a high limit. An L4006A would do that.

There are numerous other controls you could use.

EdTheHeaterMan

You replaced a L8148 with a L7224U. is that what you are talking about?

OR

You replaced a L8124 for a tankless coil boiler with a L7224U and installed the indirect and want to convert to a cold start boiler. That is a little different.

In either case you don't need the burner to keep a minimum temperature. The L7224U can do that by setting the Low Limit to the lowest temperature then one more click past that low temperature. The temperature display will read OFF . The L7224U will no longer operate the burner unless there is a call for heat at TT on the L7224U, or you get external 120 VAC input to the ZR on the L7224U from the DHW thermostat.

How is your DHW indirect tank getting hot water from the boiler? …a zone valve or a circulator pump?