Document M4Gz2NOqaV24pJpJ8yY2743B7

American Society of Heating and Ventilating Engineers Guide, 1930 . OQY BETUB>I-> COGUMG LEG AT [LEAST 5*-CT LONG S' DEDUCING COUPONS' WEES. "line Fig. 15. Dripping Heel of Riser into Dry Return. (A Gate Valve is Recommended at the Inlet Side of the Trap) Fig. 14. Dripping Ends of Supply and Dry Return Mains. (The Dry Return is of Course Too Small to be Vented) 6EDUONG COUPLING LME Fig. 18. Dripping End of Main into Wet Return \ Fig. 17. Looping.Dry Return Main Around Opening TBAP- COOUNG LG AT LEAST sy-cr LONG DCT POCKET La& ( Fig. 19. Dripping End of Main into Dry Return. (A Gate Valve is Recommended at the Inlet. 7 Side of the Trap) Chapter 20--Piping for Steam Heating Systems Heater Connections Figs. 22, 23 and 24 are typical illustrations of various approved heater connections. They may apply to vapor systems and to vacuum systems. Fig. 22. Top and Bottom Opposite End Radiator Connections with Heel of Down Feed Riser Dripped into Dry Return Fig. 23. Top and Bottom Opposite End Radiator Connections from Up or Down Feed Risers Fig. 24. Top and Bottom Same End Radiator Connections from Up or Down Feed Risers. (Not to Exceed 8 to 10 Sections). Fig. 25. Connections to Steam Type Radiator Fig. 20. Detail of Main Lift Fitting to Vacuum Pump Fig. 21. Series of Lift Fittings Where Lift Is More Than 5 ft. 362 ' QAOATOe Fig. 26. Connecting Drop FEEtLi/. Riser Direct to Radiator by Turning Valve on its Side " Fig. 27. Connections to Radiator Hung on Wall Fig. 25 shows the typical vacuum or vapor system connections to an old-fashioned steam-type radiator. Fig. 26 shows approved connections to a heater below the supply.main, with the valve above the main. Fig. 27 shows approved down-feed connections to a wall-type heater with returns 363 V' \