Lochinvar Solution boiler w/ two stage thermostat

Ross_7

Supposedly, the Vision Pro doesn't have any "droop" in temperature. It uses a PID loop to tighten up the offset in temperature. I was taking into account that if the second stage of heat did enable that the quick recovery time of both the copper fin-tube & the copper heating boiler would not be a problem maintaining room temp. Hard to say w/o just trying it out I guess

Ross_7

Lochinvar Solution boiler w/ a two stage thermostat

I know that this is not by any means a high tech question.
Has any one mated a Vision Pro 8000 2- Stage thermostat with a Lochinvar Solution series boiler. The Lo/Hi/Lo control is already built in based on return water ,but I just thought it would be nice on low load days to "lock out" the high fire through the thermostat, considering there is an interlock for High Fire on the boiler. I will also be utilizing the outdoor reset option. Just curious. Thanks in advance.
Ross

Paul Fredricks_3

I wonder though about the lag between 1st and 2nd stage. I don't know the ranges on the t'stat, but if the customer set it for 68 and high fire on a cold day didn't kick in till 66, I would guess the customer wouldn't be happy. Of course if the differential is closer it may not be an issue.

hot_rod

I think it serves as

a low return protection device also. I suppose if you could build in some other "smart" return protection mechanism.

Probably more of an issue when you connect them to radiant slabs, however.

hot rod

Ross_7

Aquastat on the return

HR,
Didn't you state befor that Viessmann used to do that ( or still do) on some of their boilers but it would shut the pump off until it reached 140, or something like that?
I thought maybe Ike from Lochinvar would chime in about this. Nice little boilers though for the right applications.