Honeywell TP972A Pneumatic Thermostat Specification Manual
The TP972A Pneumatic Thermostat is a two-temperature, two-pipe, proportioning thermostat used to control pneumatic valve and damper actuators in pneumatic HVAC control systems.
Two bimetal elements, one for direct-acting heating cycle and the other for reverse-acting cooling cycle • Adjustable throttling range • Automatic changeover from main line pressure changes • Indicating spiral bimetal thermometer • Individual concealed setpoint knobs for each bimetal
element, preventing unauthorized changes • Self-sealing branch line gage tap • Noncorrosive air passages • Glass filled Delrin backplate acts as thermal insulator to reduce cold wall effect • Air filter
Download PDF Manual Honeywell TP972A Pneumatic Thermostat Specification
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December 23rd, 2008 | by pdf manuals |
By Paul Lane on Jun 2, 2009
I live in a 60’s vintage condo, heated and cooled by circulated water. A Honeywell pneumatic thermostat controls a valve that regulates the water flow. One valve isn’t working and i suspect the thermostat, as it has been leaking air for some time. It is small, approximately 2 1/2 ” tall by 1 1/2″ wide, silver. I can find no identifying numbers on it. I removed the cover but am unable to remove the thermostat, itself. Any clue as to how this thing is removed? It will spring out a 1/16″, or so, but can find no snap or screw which might free it.
By Paul Lane on Jun 2, 2009
I have an older honeywell pneumatic, wall mounted thermostat that is apparently defective. It has no identifying numbers on it. I can remove the cover but not the thermostat itself. Any ideas? pl