Bell & Gossett DN0145D HS Vacuum Heating Units Series HVTM - Manual (Page 5)

5
SPECIAL PIPING ARRANGEMENTS FOR LOW RETURNS
(IF LIFT EXCEEDS 5 FEET, A MECHANICAL LIFT IS RECOMMENDED)
FIG. 4
FIG. 6
FIG. 5
FIG. 8 FIG. 9
FIG. 7