Wednesday Sept. 9th 2009

Expobar Office

Another pressure stat "eats it."

Notes on Expobar Office:

This is a low cost HX with volume dosing (push button panel). User is an avid coffeegeek and all around good guy. no gauge for brew or boiler psi.

Reason for service:

"Pop, hissssssssss"

Diagnostic & Repair:

Looked to be either a spent pressure stat or possibly a bad safety valve. After a bit of monitoring , determined that... another p-stat "eats it." Replaced with a MATER. Using a group thermostat, I set the boiler to produce 204 f. after robust flushing routine. Temp before flushing runs up to 211 f.