Peerless Boiler System

[ericwalker]

I have an older peerless boiler system and need to drain it in order to repair a few radiator valves. It is forced hot water. When refilling what additives should I add, if any, and to what pressure should it be filled in relation to system temperature? Also, is there a filter system I should put on, and where do I add it?

Thanks

 

[johnjh2o]

There should be a auto feed already installed on the system. There should be a valve before it that must be turned off before draining the system . After you do your work then all that is needed is to turn the valve back on. It will bring the pressure up to between 12 & 15 lbs. Once it reaches pressure vent the air from the system. No additives are needed.

John

 

[ericwalker]

Hello, thanks for reply..followup:

How best to bleed air after fill up? through radiators or pressure relief at boiler, or somewhere else in line? Also, is the 12-15 lbs at zero heat? Will I hear the system equalize - therefore I will not hear system filling anymore..

 

[johnjh2o]

Bleed the system through the radiators. At zero heat it should be 12-15 lbs. There may be a slight increase of pressure after the boiler is up to temperature. Your expansion tank or bladder tank (depending on what you have) will prevent the pressure from climbing too high.

John