Raypak RAYTHERM 0133-4001 - Manual (Page 20)

MULTIPLE-BOILER– REVERSE RETURN HOOK-UP
REVERSE RETURN PIPING IS A PROPER METHOD OF MANIFOLDING MULTIPLE BOILER HOOK-UPS TO
ENSURE BALANCED FLOW THROUGH EACH BOILER. VALVES ON SUPPLY AND RETURN ARE NEEDED
TO ISOLATE ANY BOILER, AS REQUIRED.
20
MODELS 133 TO 4001
Fig. #9495