I have a 4-plex that provides heat with a boiler system. It operates perfectly well. However, one of the apartments does not warm up enough. I purchased and installed the original 3 wire model thermostat which is compatible with the boiler. The kicker is that the pipes heat up in the apartment but does not radiate the heat. The pipes are very hot and you cannot touch them for but a second or it will burn your skin. So, basically, it is not the boiler nor is it the thermostat because the heat is transferred to the apartment. The pipe leaving the boiler and the return pipe are also steaming hot and you cannot touch them.

Have any of you ever experienced such a dilemma? Any suggestions or observations would be greatly appreciated.

Thanks
John

The pipes entering and leaving get hot, so the thermostat does its job, and the boiler and pump are working; however, someone may have messed with the thermostat sensitivity of the anticipator. This could allow the hot water to be in the pipes but shut the pumping off to cool for too long.

http://www.heatpro.us/service/anticipator.htm

www.heatpro.us energy businessmen's knowledge

Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.

Thanks for your response! The White Rodgers (1F35-910 / 3 wire) was replaced to substitute the original (shot) one. Is it common for the Thermostat Anticipator to be adjusted from the manufacture setting once installed?

I failed to mention that the apartment unit in the 4-plex happens to be the furthest from the boiler room and on the 2nd floor. Do you think this distance is also a contributing factor which supports the idea that the problem may be related to the Anticipator needing adjustment?

Thanks again for your time and response....

"Is it common for the Thermostat Anticipator to be adjusted from the manufacture setting once installed?"

Stop a moment and reflect on how the manufacturer will know where his thermostat will be used. The anticipator MUST be matched to the circuit amps flowing through it and the conditions it is in; NOT on some dream of the manufacturer. That is why the anticipator is adjustable.

www.heatpro.us energy businessmen's knowledge

Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.