iQ751 Floor-Standing Tankless Water Heater

Type Indoor/Outdoor, Commercial, Floor Mounted, Tankless, Condensing, Fully Modulating, On-Demand Water Heater
Fuel Preset for NG / LP convertible
Minimum Input (BTU/hr) 30,000
Maximum Input (BTU/hr) 751,000
Maximum Output (BTU/hr) 705,940
Thermal Efficiency 94%
Turn Down Ratio (TDR) 25:1
Water Inlet / Outlet Connections 2” Headers with 6” OD Flange
Gas Inlet Connection 1-1/4” Gas Inlet With 4-5/8” OD Flange
Condensate Drain Connection 3/4” Flex PVC
Maximum Condensate Flow Rate (GPH) 5.4
Dimensions H X W X D (Inches) 67.7 X 30 X 44.3 (48 CU. FT)
Service Clearances Recommend 24” on all sides, 32” in the front
Weight (LBS) 730 LBS
Venting Type Direct Vent (2 pipe - intake & exhaust), Power Vent (1 pipe - exhaust only)
Venting Materials (USA) Sch. 40 PVC, Sch. 40 CPVC, Polypropylene, Stainless Steel (AL29-4C)
Venting Materials (Canada) Type BH Gas Vent Classes: II A (PVC), II B (CPVC), II C (Polypropylene), I (AL 29-4C SS)
Vent Size (Diameter) 6” Ø
Max Vent Length - Single Pipe / Power Vent* 220 ft (6”)
Max Vent Length - Two Pipe / Direct Vent* 110 ft (6”)
* Venting Note: From the maximum lengths above, deduct 5 ft. per 90° elbow and 2 ft. per 45° elbow
Ignition Electronic Spark Ignition
Temperature Range 100°F – 190°F
Temperature Stability +/- 4°F
Installation Location Ambient Temperature 40°F – 130°F
Safety
Flame Rod, Thermal Fuse, Overheat Prevention Device, Fan Speed Monitor, Flue Temperature Monitor,
Blocked Vent Detector, Dual Flame Sensing
Water Pressure Min / Max (PSIG) 30 / 160
Pressure Relief Valve (Select BTU/hr Input Rating to Match Model Max Input) 3/4”
NG/LP - Min. Dynamic Gas Pressure (Full Fire) 2.5” (¾” non-corrugated, black iron)
NG/LP - Maximum Static Gas Pressure 14”
Gas Pressure for Adjustments 8” for NG, 11” for LP
Electrical 120V AC, 60 Hz
Power Consumption Max 16 Amps, 24W (Standby)
Internal Water Volume (gallons) 4