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Added photo and information on how to add water to the boiler. Updated info on hot water circuits.
== Space Expansion ==
Contractor name and contact info:
Tony Dashto, TD-HVAC<br>
33 S East River Rd<br>
Des Plaines, IL 60016<br>
Office (773)267-7727 Fax (847)827-9121
In the process of leasing the 3515 space our landlord had the shop A/C's put into working condition.
The work was done on June 8, 2016 by
TD Heating <br>
33 S East River Road<br>
Des Plaines IL. 60016<br>
773-267-7727
They also provided an estimate for an annual service contract as required by our lease. The recipt for the work and the estimate can be found in the PS1 google drive under facilities/HVAC.
This makes some of what is below no longer relevant.
== Cooling ==
== Cooling ==
== Heating Zones ==
== Heating Zones ==
==== Upstairs ====
The building has three heating zones that are separately controlled. The room in the back left corner of the main room (looking toward the back of the building) contains our boiler and our hot water tank.
=== Upstairs ===
The first zone is a hot-water circuit from the "north-side" boiler (the larger one at the back of the boiler room) serving the back stairs, the 3D/Lasers Room, the Lounge, and the upstairs areas (Electronics and Arts). The thermostat for this zone is in the 3D/Lasers room and controls the circulator for this circuit. Note that turning on the thermostat in the 3D room will also heat the upstairs. Although the radiators upstairs are controlled by a thermostatic valve, this doesn't seem to work well and it's possible to overheat the upstairs, especially if the 3D room's windows are open to provide makeup air to the lasers.
Upstairs also has forced-air heat, separate from the rest of the space. The thermostat is by the closet across from the top of the front stairs, in the craft area. The heat (and cooling) are in the closet.
=== North Shop ===
The second zone is also served from the "north-side" boiler on a second hot water circuit. This circuit feeds the four unit heaters in the north shop (General, Cold Metals, and Small Metals). The unit heaters are set up so that they will not start until the water going through them reaches a certain temperature. For this reason, it will take a while (sometimes hours) for them to start when the thermostat is turned on.
The thermostat is located in the Cold Metals area near the lathes. The non-functioning wifi thermostat was replaced by a "dumb" thermostat in the fall of 2014. This thermostat controls the circulator for this area. This is a totally separate thermostat from the air conditioner thermostat (near the breaker panels).
This hot water circuit has a high point air bleeder valve near the unit heater over the kitchen and at least one low point drain in the kitchen under the sink.
==== Trouble History ====
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.
=== South Shop ===
The thermostat is located in the metal shop area. The non-functioning wifi thermostat was replaced by a "dumb" thermostat in the fall of 2014. This thermostat controls heat in the shop area.
There is a second, smaller boiler, with a second feed valve, expansion tank, and circulating pump, for the south shop (Woods/Hot Metals). The boiler is on the opposite wall from the first (north shop) boiler. The hot water circuit from this boiler feeds two unit heaters, one in the Wood Shop and one in Hot Metals. Again, these will not switch on until the water going through is hot enough. This circuit usually heats up fairly quickly, though.
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 thermostat for this zone is in the middle of the Wood Shop, right next to the (separate) air conditioner thermostat.
== Outside air exchange ==
== Outside air exchange ==
== Maintenance ==
== Maintenance ==
Some of our HVAC systems require regular maintenance.
Some of our HVAC systems require regular maintenance.
[[File:Boiler-1-feed.png|200px|thumb|left|The water supply arrangement on the boiler for the north shop.]]
==== Water Level ====
The boilers are connected to the incoming water supply in the usual way, with pressure reducing valves. The PRV for the south-side boiler has a bypass lever on it, which can be pulled up to force water in, but it is supposed to add water automatically if needed. This lever should only be pulled up for major service, like flushing the system, or if the PRV doesn't work for some reason.
The north-side boiler's pressure reducing valve doesn't have a bypass lever. Instead, it has a separate bypass valve that can be opened to fill the boiler. As of December 2020, the PRV doesn't seem to work correctly and may need to be adjusted. If water needs to be added to the system, open the green valve under the PRV until it is topped up. Cold pressure in both boilers should be about 12 psi.
==== Pumps ====
==== Pumps ====
In the boiler room the two red pumps that force hot water for radiant heat in the front room and the shop area. These pumps have three ports for oil lubrication. The two ports on either side of the pump get 3 drops of oil each, the covered port over the bearing needs one strong squirt. This needs to be done annually. This was last preformed 2015-04-01.
In the boiler room the two red pumps that force hot water for radiant heat in the front room and the shop area. These pumps have three ports for oil lubrication. The two ports on either side of the pump get 3 drops of oil each, the covered port over the bearing needs one strong squirt. This needs to be done annually. This was last performed 2020-10-29.
==== Filter ====
==== Filter ====
The furnace/AC upstairs has a filter that will need to be changed every 30 days. Last changed 2015-07-16
The furnace/AC upstairs has a filter that will need to be changed every 30 days. Last changed 2015-09-19. [[User:Justin|Justin]] ([[User talk:Justin|talk]]) 23:09, 21 September 2015 (CDT)
[[Category:Facilities]]
[[Category:Facilities]]