Prestige SOLO 110.pdf - Bloom Lake Farms

Boiler PipingAdditional Limit ControlIf a separate LWCO device is required by certainlocal jurisdictions or when the boiler isinstalled above the system piping, the followingguidelines must be followed:- The LWCO device must be designedfor water installations, electrode probetypeis recommended.- The LWCO device must be installed ina tee connection on the boiler supplypiping above the boiler.- Wiring of the LWCO device to thePRESTIGE Solo is done directly ontothe 24V terminal strip, reference Fig.20 page 32 for available terminals foran external limit (manual or auto reset).If the installation is to comply with ASME orCanadian requirements, an additional hightemperature limit may be needed. Consultlocal code requirements to determine compliance.The limit should be installed as follows:- Install the limit in the boiler supply pipingbetween the boiler and any isolationvalve.- Maximum set point for the limit is194ºF.- For wiring of the limit reference Fig. 20,page 32, using the external limit/manualreset terminals on the 24V terminal strip.This will provide a "hard" lockoutrequiring a manual reset of the control.Backflow Preventer- Use a backflow preventer valve in themake-up water supply to the unit asrequired by local codes.Boiler System Piping ApplicationsBEST PRACTICEIt is recommended on all piping applicationsto utilize a primary/secondary pipingarrangement as a means to providefreeze protection of the boiler, which isan integral function of the boiler control.Maintain the minimum boiler flow rate,see Graph 2 on page 72. For other pipingarrangements, consult theEngineering Department at TriangleTube or consult other approved/recognizeddesign arrangements.BEST PRACTICEOn piping applications utilizing a singlezone or other recognized piping designarrangements, it is recommended that theinstaller uses flow/check valves withweighted seats at or near the appliance toprevent gravity circulation.Expansion Tank and Makeup WaterEnsure the expansion tank is properly sized forthe boiler volume (3 gallons [12 L] ) and thesystem volume and temperature.CAUTIONUndersized expansion tanks will causesystem water to be lost through the pressurerelief valve and cause additionalmakeup water to be added to the system.Eventual boiler heat exchanger failurecan result due to this excessive makeupwater addition.The expansion tank must be located as shownin Fig. 6 and Fig. 7 on page 18 or as per recognizeddesign methods. Refer, when using aprimary/secondary piping arrangement, to theexpansion tank manufacturer instructions foradditional installation details.16