Boiler problem


Old 02-14-08, 10:40 AM
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Boiler problem

I've been having boiler problems at my duplex. The first problem was no heat. HVAC tech replaced the aquastat (online) and the system worked for a couple of hours then pressure relief valve "popped". Next day the HVAC tech replaced the online aquastat with an inline unit. Everything seemed fine, but I received a call this morning from 1st floor tenant than he had no heat (Thermostat was set to 75 but Apt was only 60). The HVAC tech came back out and adjusted the Temp/limit setting (to about 190 on 180 off). The baseboard units were all receiving heat but they still do not seem to be as "hot" as they should be. There is no air in the system and the 2nd floor is heating fine. Although the system "seems" to be working properly, I'm wondering to myself if I'm missing something. Any ideas? Thank you.
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Old 02-14-08, 04:19 PM
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Aquastat settings

First of all, your settings are too close together. They need to be at least 20 apart. Other than air or some other restriction, I can't explain why the baseboard isn't hot enough.
Old 02-14-08, 05:13 PM
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The relief valve 'popped' ?

Did anyone check the expansion tank ?
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