Laars MAGNATHERM MGH2000 Installation And Operation Instructions For

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Laars MAGNATHERM MGH2000 Installation And Operation Instructions For Manual pdf 30 page image

LAARS Heating SystemsPage 26event of pressure relief. install a diaphragm-typeexpansion tank, flow check, and shutoff valveswhere needed or as required by code.The piping should be installed so that each pumpsupplies flow only to the heater to which it isattached.7.4 mGV Cold Water make-UpThe cold water make-up may be connected to thetank as shown in Figure 11 through Figure 13.if the tank does not have a tapping for the coldwater supply, the supply may be run to the pipebetween the tank and boiler inlet. Install back-flowpreventers and shut-offs where needed or requiredby code.figure 12. DHW Piping - one Heater, two Vertical tanks7.5 mGV freeze Protectionif installing outdoors in a location that mayexperience freezing temperatures, precautions mustbe taken to prevent water in the heat exchangerand condensate inside and outside of the boilerfrom freezing. Damage due to freezing water orcondensate is not covered by the warranty.if installed indoors, and there is an event such asa power outage, component failure or other issuewhen freezing is likely, the heater and systemmust be drained to avoid the risk of damage dueto freezing. Glycol must not be used in volumewater heating applications.noteS:1. Locate the MGV DHW sensor or remote aquastat wellin lower 1/3 of tank.2. Back flow preventer may be required - check localcodes.3. Thermal expansion tank may be required -check local codes.4. Caution: Pump sizing must be based upon waterhardness at job site.5. If the tank does not have a tapping for the cold watersupply, the supply may be run to the pipe between thetank and boiler inlet.Cold watersupply2Expansiontank1PumpTPRV1BuildingreturnBall valve(typical)TPRVSupplynote: This drawing showssuggested piping configuration andvalving. Check with local codes andordinances for additional requirements.