Weil-McLain 80 manual Piping for multiple boilers see Figure

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• Installation • Start-Up • Maintenance • Parts

7 Connect water boiler piping (continued)

3. Piping for multiple boilers (see Figure 13):

Figure 13 Multiple water boiler piping

ASize secondary boiler pump GPM based on following formulas:

Gross output

= GPM

Temperature rise x 500

Temperature rise, °F = 230°F – Return water temperature

Gross output is in Btuh.

Calculate only secondary piping circuit resistance. Boiler resistance will be about equal to three 90 degree elbows of secondary pipe size. Operate each boiler and its secondary pump from a Weil-McLain boiler control panel. Do not maintain boiler at predetermined water temperature.

BPrimary pump GPM and head calculation should not include secondary boiler circuits. Primary pump can operate continuously during heating season.

CSpace 12" maximum or as close as practical.

DCheck valve.

EHand valve.

Expansion tank(s), relief valves and other accessories are required but not shown.

Part No. 550-141-935/0602

15

Image 15

Contents Boiler Manual Contents Lay a foundation, if needed Before installing boilerInstallation must comply with Before selecting boiler locationProvide combustion and ventilation air openings For packaged boiler For block assemblyUsing crane attach free end of cables to eye of crane Set boiler in placePlace a block under pipe to hold section upright Install back refractory blanketAssemble block Prepare back sectionInstall intermediate sections If using tankless heater TI sectionsPrepare remaining sections Prepare boiler and test Perform hydrostatic pressure testComplete block assembly Install burner mounting plate on front sectionInstall cleanout plates Prepare flue collector hood assembly Install flue collectorFlue collector assembly Install collector hold-down boltsInstall flue collector Top flue boilers only Before installing flue collectorAfter installing flue collector, ALL Boilers Rear flue boilers onlyInstall flue collector Install piping Connect water boiler pipingGeneral water piping information Size secondary boiler pump GPM based on following formulas Piping for multiple boilers see FigureGeneral steam piping information Connect steam boiler pipingConnect steam boiler piping Condensate piping to boiler Condensate receiver capacity Multiple Steam Boiler Piping Gravity Condensate Return Install jacket front and rear panels Install jacketBefore installing jacket Install support brackets and railsInstall jacket Install jacket side panels Install jacket top panelsInstall jacket trim Jacket side panel placement Models 380, 480, 580 Jacket side panel placement Models 780, 880 Jacket side panel placement Models 1080, 1180, Jacket top panel placement Pipe tankless heaters To pipe tankless heatersSize piping no smaller than heater inlet and outlet Install controls Install water boiler controlsInstall controls where shown in and Figure Install steam boiler controlsWater level control locations see Table Connect breeching and venting systems General venting information Construct metal breechingSelect type of venting system Install burner Wiring and fuel pipingMake final adjustments Check boiler for gas-tight seal Freeze protection when usedDimensions and ratings Dimensions and ratings Parts Parts Eye Irrigate immediately Breathing Fresh air Handling ceramic fiber and fiberglass materialsPropane boilers propane gas odorant All Residential & Commercial Cast Iron Boilers

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