PB Heat DE manual Expansion Tank, INDIRECT-FIRED Water Heater, Freeze Protection

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WATER PIPING AND CONTROLS

D.EXPANSION TANK

1.Consult the tank manufacturer’s instructions for specific information relating to tank installation. Size the expansion tank for the required system volume and capacity. See Table 10.2 in Section 10 for boiler water capacity.

2.Expansion tanks are available with built-in fill valves and check valves for reducing supply water pressure and maintaining minimum system pressure. Check the design features of the tank and provide valves as necessary.

Refer back to Figure 3.1 for typical expansion tank piping.

E.INDIRECT-FIRED WATER HEATER

If the boiler is to be used in conjunction with an indirect- fired water heater, refer to Figure 3.7 for typical piping. Follow the instructions provided by the water heater manufacturer. Pipe the water heater as a separate zone.

F.FREEZE PROTECTION

For new or existing systems that must be freeze- protected:

WARNING

Use only inhibited propylene glycol solutions of up to 50% by volume with water. Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.

1.Glycol in hydronic applications is specially formulated for this purpose. It includes inhibitors which prevent the glycol from attacking metallic system components. Make certain that the system fluid is checked for the correct glycol concentration and inhibitor level.

2.The antifreeze solution should be tested at least once a year and as recommended by the antifreeze manufacturer.

3.Antifreeze solutions expand more than water. For example, a 50% by volume solution expands 4.8% in volume for a temperature increase from 32°F (0°C) to 180°F (82°C), while water expands 3% with the same temperature rise. Allowance must be made for this expansion in system design.

4.For more information, consult the PB Heat LLC Water Installation Survey and the antifreeze manufacturer.

Figure 3.7: Typical Piping with Indirect-Fired Water Heater

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Contents Series DE Table of Contents Using this Manual Installation SequenceSpecial Attention Boxes Preinstallation Accessibility ClearancesClearance from Combustible Construction AIR for Combustion and VentilationWhere Ifan = Input of the fan assisted appliances in Btu/hr Required Volume other =Air Openings All Air from Outdoors through Vertical Ducts Mechanical Combustion Air SupplyInstallation Survey Planning the LayoutCombustion Air Ducts Boiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesExpansion Tank INDIRECT-FIRED Water HeaterFreeze Protection For new or existing systems that must be freeze- protectedVenting GeneralChimney Venting Direct Exhaust Horizontal VentingEquivalent Vent Length Direct Exhaust, Sidewall Venting with Vertical Off-Set Direct Exhaust Vertical Venting Direct Exhaust Sidewall VentingBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerNatural Gas Wiring Controls Zoned System WiringElectrical Wiring and Connection Diagram Sequence of OperationIgnition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations For Your Safety Read Before Lighting Adjustment of GAS Pressure Regulator Control DescriptionsChecking Burner Input See .1 in Electrical for locations of these devicesCHECK-OUT Procedure START-UP Procedures Troubleshooting Troubleshooting GuidesMeasuring Suction Pressure Procedure For Measuring Fan Suction Pressure Boiler Troubleshooting Guide Burners Functioning See FigureBoiler Troubleshooting Guide Burners Not Functioning Maintenance Daily with Boiler in USE Weekly with Boiler in USEMonthly with Boiler in USE Annually Before Start of Heating Season Intermittent Pilot and Main Burner FlameBoiler Dimensions & Ratings Series DE Boiler RatingsRepair Parts Repair Parts Series DE GAS BoilerBase/Burners/Manifold Repair Parts Page Page Series DE

DE specifications

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