Modernization of an individual heating point

Replacement of equipment in the automation cabinet of the heating point (modernization of the heating point)

Our company received an appeal from the engineering systems maintenance service of one of the shopping centers in Moskovsky. The problem was that the maintenance staff was forced to manually monitor the temperature of three circuits (heating, ventilation, hot water supply), switch pumps every 12 hours. Although there was an automation system, it did not fully work.
Accordingly, it was necessary to modernize the ITP, as a result of which automatic feeding of circuits by pressure sensors would be implemented.
In general, a working automation system of the heating point is needed.
It became clear from the photos and correspondence that there was no design documentation for the cabinet. When visiting the facility, it was revealed that the automation cabinet bears traces of several attempts at upgrades, and at the time of inspection, a certain "solyanka" was formed according to the composition of the equipment: two TRM32-Sh7 2012 in, a SUNA controller, three local controllers, several input/output modules. The markings were partially preserved, there were wires going in an unknown direction. 

 

 

The sequence of the modernization carried out:

1. The work began with finding out the coincidence/discrepancy of the current pipe placement with the functional automation scheme. We made the necessary notes, sketched the actual functional diagram, placed all the sensors and devices available in the system on it, and corrected the marking of the names of the devices.

 

2. Disassembled the cabinet, removed non-functioning equipment from it, handed it over to the Customer. 
Based on the results of the audit of the facility, an I/O table was compiled, from which it became obvious which equipment needed to be purchased: SPK107 (M01) OWEN, two I/O modules, a power supply, several pressure sensors.

 

3. Created application software for SPK107 (M01) OWEN.
4. We started connecting field signals to I/O modules. This process turned out to be the most time-consuming, as part of the sensors turned out to be punched into the housing and the current flowed through the pipe material. Until they started connecting the sensors one by one, it was not possible to proceed with further steps. In the process of work, several sensors had to be replaced.
5. Connected discrete circuit control valves, connected pump control circuits.
6. We brought SPK107 OWEN to the OWENCLOUD cloud and registered the appropriate notifications about violations that occur, notifications come to the Customer, it is possible to monitor the graphs of the device.


 

As a result, the Customer was satisfied with the work, automation of ITP was successful. The thermal point is fully operational and will stabilize the temperature in the building contours. There will be noticeable savings in coolant consumption, there will be no penalties for incorrect use of coolant from the supplying organization. 

 

 
Then everything that was not needed was dismantled








 
 
This is what the final version of the automation cabinet looks like after the upgrade: 



This is what the closet looks like from the outside. It may not be very attractive, but it is a fully functional solution and quite budget-friendly. 



This is what the video frame of the control system looks like (weather-dependent regulation is implemented):



 

#MODERNIZATIONITP, #SPK107OVEN, #AUTOMATIONITP, #weather-dependent regulation, #replacement of equipment