Laars MagnaTherm MGH1600 Installation And Operation Instructions Manual

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Laars MagnaTherm MGH1600 Installation And Operation Instructions Manual Manual pdf 31 page image

MagnaTherm Boilers and Water HeatersPage 27Figure 13. DHW Piping - Two Heaters, Two Vertical TanksNOTE: This drawing showssuggested piping configuration andvalving. Check with local codes andordinances for additional requirements.BuildingreturnSupplyTPRV2Ball valve(typical)13Cold watersupplyExpansiontankPumpPumpCheck valveCheck valveTPRV7.6 MGV Water FlowSee Section 5 for water flow and head requirements.Note - The head loss for the piping, fittings, andaccessories must be calculated and added to theheater head loss to get the total required pump head.An undersized pump will result in insufficient flow.This can result in scale buildup and failure of theheat exchanger.7.7 Condensate Drain TrapA condensate drain trap is included with theMagnaTherm and is designed to drain the boiler ofcondensate. The vent condensate should be drainedthrough a drain tee located in the vent line. This willhelp prevent excessive condensate from entering theboiler condensate trap.Connect a 3/4” PVC pipe between the drainconnection and a floor drain (or condensate pump if afloor drain is not accessible).The condensate drain must be installed toprevent the accumulation of condensate. Whena condensate pump is not used, the tubing mustcontinuously slope downward toward the drain withno spiraling.Consult local codes for the disposal method.CautionCondensate is mildly acidic (pH=5), andmay harm some floor drains and/or pipes,particularly those that are metal. Ensurethat the drain, drainpipe, and anything thatwill come in contact with the condensatecan withstand the acidity, or neutralizethe condensate before disposal. Damagecaused by failure to install a neutralizerkit or to adequately treat condensate willnot be the manufacturer’s responsibility.NOTES:1. Locate the MGV DHW sensoror remote aquastat wellin lower 1/3 of tank.2. Back flow preventer may berequired - check local codes.3. Thermal expansion tank may berequired - check local codes.4. Caution: Pump sizing mustbe based upon waterhardness at job site.5. If the tank does not have a tapping forthe cold water supply, the supply maybe run to the pipe between the tankand boiler inlet.6. Common piping must be sized forthe combined water flow of all theheaters.