CSVB Series II - Columbia Heating

INSTALLATION SYSTEM PIPING• Install radiation units (panels, radiators or cabinets) andsupply and return mains first then make connections atboiler.• Verify clean water supply is available when connectingcold water supply to water valve. Install sand strainer atpump when water supply is from well or pump.• Provide low water cutoff device when boiler is installedabove radiation level or as required by the Authorityhaving jurisdiction, either provide as part of boileror at time of boiler installation. Periodic inspectionis necessary, as is flushing of float type devices, permanufacturers specific instructions.• Boiler used in connection with refrigeration systemsshall be installed so chilled medium is piped in parallelwith heating boiler with appropriate valves to preventchilled medium from entering heating boiler. See Figure5.• Boiler connected to heating coils located in air handlingunits exposed to refrigerated air circulation, pipingsystem shall be equipped with flow control valves orother automatic means to prevent gravity circulation ofboiler water during cooling cycle.Low Design Water Temperature Systems (Below140°F) And Large Water Content SystemsCondensation is corrosive and can eventually cause severedamage to boiler and venting system.• Minimum design return water temperature to preventcondensation in boiler and venting is 120°F. Minimumhigh limit setting is 140°F.• Boiler used in heating systems where design watertemperatures below 140°F are desired (e.g. radiant floorheating), a 3-way or 4-way mixing valve or suitablealternative is required to prevent low temperature returnwater from entering boiler. When using mixing valve,follow manufacturer’s installation instructions.• Boiler connected to system having large water content(such as former gravity system), suggest use of bypasspiping. See Figure 6.Figure 5 - Piping Arrangements For Boiler WhenUsed In Connection With RefrigerationSystemFigure 6 - Bypass Piping9