Tying fan coil into Peerless Purefire

Edbrown

Raised ranch house over the garage and basement.

We have an existing Peerless Purefire (Rev 2) installed and running 3 baseboard heating zones off zone valves.  It has a primary loop/circulator and a secondary heat loop with the circ and zone valves.

The homeowner would like to add a small hanging fan coil in his garage off the heating system.  He does not do domestic hot water off the boiler so we were thinking of making the fan coil loop the "primary" loop.  This would bring the boiler water temp up to the maximum.  The drawback is that if there is a call for heat in the garage - the rest of the home will not heat.  Is there anyway to override the priority lockout of the heat zones?  We would be ok with warmer water going into the heating zones when the fan coil is heating.

Its either something like this or we have to turn up the temp curve on the boiler to keep the water temp much hotter - killing the efficiency.

Any ideas would be great!

Zman

Hot dawg

Modine came out with a hot dawg low temp fan coil.

I would pipe one as a regular zone.

Carl