A.O. Smith Century Pool & Spa Motor, homeappliance

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Residential Heating CIRCULATING LOOP HEAT EXCHANGERS The ProMax® XL circulating loop heat exchanger is designed specifically for installation with A.O. Smith ProMax® SL (Side Loop) gas water heaters. The combination of a ProMax SL water heater and ProMax XL heat exchanger provides domestic hot water, and an isolated source of hot water for radiant floor heating, hydronic air handlers and other closed loop applications. OUTPUT OPTIONS ■ 28,000 BTU (RXLD-28 and RXLS-28) ■ 52,000 BTU (RXLD-52 and RXLS-52) COMPACT, EFFICIENT, BRAZED PLATE HEAT EXCHANGER ■ UP TO 60% smaller than traditional shell & tube and coaxial heat exchangers SINGLE OR DOUBLE-WALL DESIGN ■ Double-wall construction for applications requiring double isolation between fluid streams AUXILIARY CONNECTIONS EXPAND OPTIONS ■ Plugged connections can be used as installation points for thermowells, a drain or for flushing heat exchanger ■ Connections located on front of heat exchanger, common to primary side of heat exchanger 115V/60Hz PUMP ■ Control relay (24 volt coil) located inside wiring junction box PROMAX SL GAS WATER HEATER OPTIONS ■ Standard Vent ■ Direct Vent ■ Power Vent ■ Power Direct-Vent STANDARDS ■ All components UL Listed 1-YEAR LIMITED WARRANTY ■ For complete information, consult written warranty or contact A.O. Smith Water Heaters Page 1 of 2 ARGSS00307 Revised July 2008 AOSRG46600 Residential Heating CIRCULATING LOOP HEAT EXCHANGERS COIL & AIR HANDLER APPLICATION - HEAT EXCHANGER SELECTION TABLE 1600 150 F SOURCE (TANK) 0 140 F SOURCE (TANK) 0F SOURCE (TANK) MODEL BTUH GPM PD (FT.) BTUH GPM PD (FT.) BTUH GPM PD (FT.) DOUBLE WALL RXLD-28 28,000 2.8 1.0 30,000 3.0 1.1 55,000 5.5 3.7 HEAT EXCHANGER RXLD-52 52,000 5.2 0.9 55,000 5.5 1.1 79,000 2.3 0.5 SINGLE WALL RXLS-28 28,000 2.8 0.7 36,000 3.6 1.1 68,000 6.8 4.3 HEAT EXCHANGER RXLS-52 52,000 5.2 1.3 60,000 6.0 1.7 95,000 9.6 8.5 RADIANT FLOOR APPLICATION - HEAT EXCHANGER SELECTION TABLE 1400F SOURCE (TANK) MODEL BTUH GPM PD (FT.) 1500F SOURCE (TANK) BTUH GPM PD (FT.) 1600F SOURCE (TANK) BTUH GPM PD (FT.) DOUBLE WALL RXLD-28 28,000 2.8 1.0 48,000 4.9 3.0 65,000 6.5 5.3 HEAT EXCHANGER SINGLE WALL RXLD-52 RXLS-28 52,000 28,000 5.2 2.8 0.9 0.7 82,000 50,000 8.3 5.0 2.4 2.3 110,000 98,000 11.1 9.8 4.1 8.9 HEAT EXCHANGER RXLS-52 52,000 5.2 1.3 84,000 8.4 3.6 115,000 11.6 6.2 HEAT EXCHANGER PRESSURE DROP For Secondary Loop Flow Calculations. PROMAX SL WATER HEATER CROSS-REFERENCE PROMAX SL WATER HEATER MODELS OUTPUT STANDARD VENT DIRECT VENT POWER VENT POWER DIRECT VENT GCVH-40L GCVT-50L GCVX-50L GCV-65L FCG-75L GDV-40L GDVT-50L GDV-75L GPVT-40L GPVT-50L GPVX-50L GPS-75L GPD-40L GPDX-50L GPD-75L 29,600 38,000 50,050 49,400 57,000 30,780 40,500 44,550 39,000 39,500 49,400 64,000 30,400 47,450 53,200 For Technical Information and Automated Fax Service, call 800-527-1953. A.O. Smith Corporation reserves the right to make product changes or improvements without prior notice. Revised July 2008 www.hotwater.com Page 2 of 2 AOSRG46600