9
System Piping
Important… INSTALLATION MUST BE PERFORMED BY TECHNICALLY QUALIFIED SERVICEMEN
SOLAIA BOILERS HAVE A MAXIMUM OPERATING PRESSURE OF 58PSI
NOTE: If normal operating pressures are greater than 30psi please contact the manufacturer for required trim.
Pipes that are connected to boiler fittings must be supported and placed so that they do not create stresses on the boiler fittings themselves.
BY PASS PIPING IS REQUIRED ON ALL LOW MASS BOILERS WHERE THE BOILER RETURN WATER TEMPERATURE COULD OPERATE BELOW 130ºF FOR EXTENDED PERIODS OF TIME.
The Solaia boiler is a highly efficient low mass boiler in which care must be taken to ensure that high volumes of low temperature water are not introduced into the boiler. Operating at return water temperatures below 130ºF for extended periods of time will allow for the accumulation of condensation, scale and increased soot formation in the boiler. Corrosion and eventual heat exchanger failure will result. A thermostatic bypass valve is highly recommended on high water volume standing cast iron systems.
A thermostatic bypass valve will consistently ensure that return temperatures to the boiler exceed 130oF at all times. See Figure 1 for Thermostatic Bypass valve piping.
Instead of using a thermostatic bypass, bypass piping may be accomplished by placing a 3/4” bypass line with a throttling valve for regulation between the supply piping and return piping. Boiler return water temperatures must exceed 130ºF with the bypass properly adjusted.
Low water cut off
Hot water boilers installed above radiation level must be provided with a low water cut off device at time of the boiler installation.
Relief Valves
Relief valves are to be properly piped in to conform to code standards. Discharge piping from the relief valve must be piped to a drain or must terminate 6” above the floor to eliminate damage to the structure or personal injury. It must not be piped to a point where freezing may occur.
Expansion Tanks
The expansion tank must be properly sized to the system requirements. An undersized expansion tank will cause system water to be lost through the relief valve and make up water to be introduced through the fill valve. Continual introduction of fresh water will cause boiler failure.
