In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Old Johnson Controls Residential Pneumatic System
In need of a little wisdom.
We picked up a "new" account and a new homeowner who wants to update his system. The system is controlled by a Johnson Controls Pneumatic system, vintage 1950. In the basement is a compressor and a control panel that kinda looks like Captain Nemo's dashboard. Banks of old pressure gauges, Mercoid controls, etc. piped in with multiple 1/4" copper tubing going up into the house. Each room has it's own pneumatic thermostat and each radiator in that room has a pneumatic rad valve. The system is still operational and is a thing of beauty. It really hurts to shut down such a cool retro relic.
When we killed the air pressure and fired the boiler, we found that the rad valves are Normally Open.
Rather than cut out 35+ pneumatic rad valves, the customer would like to leave the rad valves in place, but wants the pneumatic thermostats in each room removed.
What potential downside is there to just cutting the T-stats loose from the copper tubing? Could one of the rad valves leak from the water side into the now abandoned pneumatic tubing? When we killed the air pressure in the system, we could hear water (condensate) trickling back through the pneumatic tubing into the compressor.
If anyone has had any experience shutting down, abandoning or decommissioning a system like this, I'd appreciate your input. Thanks in advance.