Solaris Manual 8-091.pdf - Categories On Thermal Solutions ...

See Figure 13.a. Pipe the safety relief discharge to a suitable placefor disposal when relief occurs.b. Do not install reducing couplings for otherrestrictive devices in the safety relief dischargeline.c. The safety relief discharge line must allow forcomplete drainage of both the valve and line.5. If the relief valve discharges periodically, this maybe due to thermal expansion in a closed watersupply system. Contact the water supplier or localplumbing inspector on how to correct this situation.DO NOT PLUG THE RELIEF VALVE.6. Install the drain valve provided with the appliance atthe lowest elevation. See Figure 13.7. If this boiler is used in connection with refrigerationsystems, the boiler must be installed so that thechilled medium is piped in parallel with the boilerusing appropriate valves to prevent the chilledmedium from entering the boiler, see figure 13A.Also consult I=B=R Installation and Piping Guides.If this boiler is connected to heating coils locatedin air handling units where they may be exposed torefrigerated air circulation, the boiler piping must beequipped with flow control valves or other automaticmeans to prevent gravity circulation of boilerwater during operation of the cooling system.8. Install water flow switch. Water flow switch mustbe located such that water flow disruptions do notaffect switch operation. Maintain maximum practicalstraight piping before and after flow switch tominimize water disruptions. Refer to manufactures’instructions for proper paddle length.9. A low water cutoff is required to protect a hot waterboiler when any connected heat distributor (radiation)is installed below the top of the hot waterboiler (i.e. baseboard on the same floor level as theboiler). In addition, some jurisdictions require theuse of a LWCO with a hot water boiler. If a lowwater cutoff is required, it must be mounted in thesystem piping above the boiler. The minimum safewater level of a hot water boiler is just above thehighest water containing cavity of the boiler; that is,a hot water boiler must be full of water to operatesafely.10. Oil, grease, and other foreign materials whichaccumulate in new hot water boilers and a new orreworked system should be boiled out, and thenthoroughly flushed. A local qualified watertreatment chemical specialist is a suggested sourcefor recommendations regarding appropriatechemical compounds and concentrations which arecompatible with local environmental regulations.11. After the boiler and system have been cleaned andflushed, and before refilling the entire system addappropriate water treatment chemicals, if necessary,to bring the pH between 8.8 and 9.2.12. If it is required to perform a long term pressuretest of the hydronic system, the boiler should firstbe isolated to avoid a pressure loss due to theescape of air trapped in the boiler.To perform a long term pressure test including theboiler, ALL trapped air must first be removed fromthe boiler.A loss of pressure during such a test, with novisible water leakage, is an indication that theboiler contained trapped air.WARNINGFailure to operate the unit with the properwater flow rate can lead to appliance failure.Always install water flow switch so that theunit stops operating if improper water flowis present.Safety relief valve discharge piping mustbe piped such that the potential of severeburns is eliminated. DO NOT pipe in anyarea where freezing could occur. DO NOTinstall any shut-off valves, plugs or caps.Consult Local Codes for proper dischargepiping arrangement.Do not operate boiler with flow rates inexcess of the maximum flow rates listed inTable 2. Boiler tube erosion and pitting willoccur. Thermal Solutions Standard Warrantydoes not cover problems caused byexcessive water flow rates.If a high head system pump is installed, assurethat the boiler relief valve and systempiping are capable of operating properlyat the combined pressure of the system fillpressure plus the pump static head pressure.21