I have a two-family house. I just had new gas -steam heat boilers installed.
Unit one runs for about 35 minutes and then short cycles. The plumber who installed them has been making adjustments to the PressureTrol. The Main is set at 2 and now the Diff is set at 1.5. The system runs better than it did at the original setting of 1.0 Diff. They changed all the vents on the radiators. Even replaced the PressurerTrol yesterday
Given that after all these changes the system still Short Cycles I wondered if you had any suggestions on what else could be done? Can the Pressuretrol be adjuster further to allow a longer cycle time between restarts so the pressure in the system has more time to let the heat from the steam pressure to heat the apartment before turning back on?
Example of the latest heat cycle :
Current Temperature = 62 raise heat call to 65 system call shuts off at 66
After running for 24 minutes temp = 62
After running for 34 minutes temp= 64
After running for 38.47 the system short cycles the temp = 64 boiler pressure 2.5 psi when it shuts down
System restarts at 41.00 minutes temp = 64 Boiler pressure = 1 psi
After 46:40 system short cycles temp = 65
The temperature rises to 66 before the boiler needs to restart
Any suggestions would be appreciated.
Could the boiler be oversized and causing the pressure build-up ? 140BTU Burnham PIN5
Note: had oil previously and did not have this issue.
Signed
ED
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