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DHW indirect tank question
Have a new customer with a indirect storage tank and a complaint of insufficient hot water capacity. Whole system is fairly new and customer doesn't want to pay for a larger tank. In this particular application, customer already has a timed recirculation pump w/ crossover valve at furthest fixture. No dedicated recirc line.
I would like to propose adding a mixing valve tied into cold water line along with raising the temp on the boiler for the DHW priority to get a little more capacity.
My question is, with the crossover valve installed, when the recirc pump is running, would it cause the cold water to be heated enough that the mixing valve would feed a higher temp hot water than is set for?