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Can't adjust low limit on Honeywell AQ2000
Hello, I recently installed a Honewell AQ25A42B Zone controller on my hot water boiler. I like the fact that it has up to a 40 degree high limit differential. However the control isn't operating the way i expected. The instructions state that it will split the differential around the hight limit. So 40 degree diff. with a high limit of 160, I would expect to operate between 140 and 180. But the control is completely ignoring the differential setting. The burner kicks on at 150 and off at 160. The 150 degree setting is the low limit setting default, which is suppose to be adjustable, but it does not come up in the menu. Can anyone familiar with this control tell me if I'm missing something. Thank you