Catalog No.: 3500.24C Effective: 08-10-11 Replaces: 01-15-08Raytherm - Type WHModels 2100-4100 ModelMODELS WH 2100 – 4001MBTUH Width OverallHeightGasConn.WaterConn.FlueDia.ModelNo. Input Output A B G H KApprox.ShippingWeight (lbs)WH-2100 2100 1722 61 68-1/4 * 3 24 1400WH-2500 2499 2049 70 68-1/4 * 3 26 1580WH-3001 3000 2460 81-1/4 68-1/4 2 3 28 1750WH-3500 3500 2870 92-1/2 68-1/4 2 3 30 1920WH-4001 4000 3280 103-3/4 68-1/4 2 3 32 2100* 1-1/2” or 2”, contingent on water heater type code requirementsNOTES: Dimensions are in inches.Ratings are for elevations up to 2,000 feet. For elevations over 2,000 feet, reduce ratings4% for every 1,000 feet above sea level.HEATER RATES OF FLOW AND PRESSURE DROPS20°F ΔT 30°F ΔT 40°F ΔTModelNo. GPM ΔP (ft) GPM ΔP (ft) GPM ΔP (ft)WH-2100 172 11.0 115 4.9 N/A N/AWH-2500 N/A N/A 137 7.5 102 4.3WH-3001 N/A N/A 164 11.2 123 6.5WH-3500 N/A N/A 191 16.8 144 9.3WH-4001 N/A N/A N/A N/A 164 12.8Maximum acceptable flow through heat exchanger tubes is200 GPM.HEATER RECOVERY RATES (GPH)Temperature RiseModelNo. 20°F 30°F 40°F 50°F 60°F 80°F 100°FWH-2100 10336 6890 5168 4134 3445 2584 2067WH-2500 12300 8200 6150 4920 4100 3075 2460WH-3001 14765 9844 7383 5906 4922 3691 2953WH-3500 17227 11484 8613 6891 5742 4301 3445WH-4001 19688 13125 9844 7875 6563 4922 3938Raypak, Inc. 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (800) 872-9725 www.raypak.comElectrical RatingModelsW/Pump W/OPump951276pump*11 Amps @230VAC2100-400122 Amps @110VAC< 8 Amp@120VAC* Pump requires separatepower supply