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The front room has a thermostat near the safe. This system is independently controlled by the same boiler system in the boiler room. This thermostat ALSO controls radiator pipes upstairs. Setting the thermostat high in the lounge can make the upstairs area very warm, be aware.
The front room has a thermostat near the safe. This system is independently controlled by the same boiler system in the boiler room. This thermostat ALSO controls radiator pipes upstairs. Setting the thermostat high in the lounge can make the upstairs area very warm, be aware.
==== Shop ====
Around the end of December 2015 the heat in the shop stopped working. the boiler, thermostat and the circulating pump all seemed in working order. Most likely cause was determined to be an 'air lock' preventing circulation. There is a valve at the high point of the piping, it's at the heat exchanger above the kitchen just north of the door to the shop. The boiler was switched off, a hose was run from the valve to the kitchen sink and the valve was opened. Nothing happened. The gauge on the boiler showed 12 psi and it was expected that the automatic makeup water valve would open and add water to the system forcing any trapped air out. This did not happen. Water was added manually until a steady flow was draining into the kitchen sink. The air bleed valve was closed and the system was turned back on. The system was run until all four heat exchangers in the shop came on. Then the process was repeated and more air was purged. It was also noted that prior to starting the process that the expansion tank was empty although the boiler was hot. The system was left running with a boiler pressure of 18psi and the expansion tank about 1/8 full.
* It may be that the automatic make up water valve is defective or set to come on below 12 psi and it also may be that the static pressure at the valve is about 12 psi with another valve open to atmosphere.
== Outside air exchange ==
== Outside air exchange ==