Vision?

Jamie_6

On page 23 of the Vision directions it shows a high limit which is wired through the primary circ. This does not make any sense to me, why would you not kill the boiler and let the primary run to dissipate the heat?

I am also looking at a job in which I am going to install a Munchkin and would like to use the vision card. Although, there is a new Wiel indirect there. Will the Vision sensor fit into a wiel?


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munchkin-man

Vison one is a two temp system with priority

When the priority calls the P1 primary loop circ is disabled. P2 is energized and the Munchkin goes right to high fire and can deliver up to 194 degrees to the Superstor Ultra for fast recovery. If central heat is calling when set point on the indirect or priority programable maximum run time has elapsed, the central heat circulator will be energized thus pumping up 194 degree water to say low temp radiant media. The high limit will regulate the P1 circulator like injection, and prevent slugs of high temp to the low temp media.

I have tryed it here in the training room using a T50 and found the that the 194 degree water very quickly tempers so that it will not cause damage to any low temp media. However the T50 only has about 2 quarts of water in it so it tempers quickley. If you were using say the Munchkin 399 it has 1.5 gallons of water in it or a bank of Munchkins you may deliver a slug that probably would not harm any media but potentially may. Additionaly you must consider the water volume in the primary piping. The high limit will make the P1 circulator run an on off cycle untill the water temp is bellow the high limit feild set limit setting.