Superstor45 not supply enough hot water

Dewey

<span style="color:#000000">I



recently had a Honeywell L7224 aqua-stat installed. I also have an



indirect water heater installed and Argo ARM 3P Switching Relays With



Priority. My issue is that I am running out of hot water. I have my high



limit set to 190 and my low set to 170 with a differential of 10. My



boiler will not fire up until it goes below the low limit. I would of



expect the boiler to fire up as soon as I it notices that the hot water



heater is in use. I have the arm3p set with priority and wired to the zr



and zc terminals of the aquastat. I was unsure as with on of the



setting. Should the DUU setting be set to on or off. Also, with the



arm3p controller should the boiler turn on when immediately when it is



being called for hot water or should it wait until it hits the low temp



limit.















thanks in advance</span>