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Multi-unit steam temperature averaging control

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The Steam Whisperer
The Steam Whisperer Member Posts: 1,219
edited April 2023 in THE MAIN WALL
Hey, I was wondering what your guys have been using for a temperature averaging control in smaller building with smaller budgets. WE use R&D for larger buildings and was using the Honeywell 8000 series Redlink for lower cost controls, but the Honeywells have become increasingly unreliable. The units we installed when they were still new still on the market are still working well after 8 years, the new ones seem to have constant problems. This would be for 6 flat buildings and smaller with wireless sensors.
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  • STEAMFITTER597
    STEAMFITTER597 Member Posts: 9
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    Find redlink t-Stats are only good for room monitoring.  They use an algorithm to figure out when to start. But it becomes so fine. That the boiler will try to start then stop about four times before getting a full call for heat. Even when hooked to a heat timer multi stage elite it will cycle on and off several times before fire is achieved. R&D is a good controller. But it is only an averaging controller. Means space is already losing heat.  Before boiler is called. 
    Boiler is going to take time to build steam and reach radiators. Thermostats on steam are reactive. Outdoor compensators are proactive. They will start building steam before heat is lost in system. Heatimer MPC is by far the best. For single boiler operation. The return temperature sensors can go down to 70°F. Making them perfect for vacuum steam operation. Tekmar 269 return sensor can only go to 130. Works fine for single and two pipe.