Catalog
Request Information
Xtreme™ is a family of high-input, fast recovery commercial water heaters that complies with Low NOx Emissions.
Unit of Measure

Specifications

Manufacturer

 N/A Rheem®

Tank Capacity

 N/A 90 gal341 L

Input Power

 N/A 550000 BTU/hr

Type

 N/A Natural Gas

Thermal Efficiency

 N/A 80 %

Front Side Water Connection

 N/A 2 in51 mm

Rear Side Water Connection

 N/A 2 in51 mm

Standard Approximate Shipping Weight

 N/A 905 lb411 kg

ASME Approximate Shipping Weight

 N/A 945 lb429 kg

Voltage

 N/A 120 V

Current

 N/A 2.5 A

Working Pressure

 N/A 160 psi

Style

 N/A Xtreme™ Low NOx

Size

 N/A C

Industry Standards

 N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE Standards 90.1-1999 ASME Certified CSA® Certified UL® Listed

Maximum Recovery

Recovery at 40 ºF Temperature Rise

 N/A 1333 U.S. gal/h

Recovery at 22 ºC Temperature Rise

 N/A 5047 L/h

Recovery at 50 ºF Temperature Rise

 N/A 1067 U.S. gal/h

Recovery at 28 ºC Temperature Rise

 N/A 4037 L/h

Recovery at 60 ºF Temperature Rise

 N/A 889 U.S. gal/h

Recovery at 33 ºC Temperature Rise

 N/A 3364 L/h

Recovery at 70 ºF Temperature Rise

 N/A 762 U.S. gal/h

Recovery at 39 ºC Temperature Rise

 N/A 2884 L/h

Recovery at 80 ºF Temperature Rise

 N/A 667 U.S. gal/h

Recovery at 45 ºC Temperature Rise

 N/A 2523 L/h

Recovery at 90 ºF Temperature Rise

 N/A 593 U.S. gal/h

Recovery at 50 ºC Temperature Rise

 N/A 2243 L/h

Recovery at 100 ºF Temperature Rise

 N/A 533 U.S. gal/h

Recovery at 56 ºC Temperature Rise

 N/A 2019 L/h

Recovery at 110 ºF Temperature Rise

 N/A 485 U.S. gal/h

Recovery at 61 ºC Temperature Rise

 N/A 1835 L/h

Recovery at 120 ºF Temperature Rise

 N/A 444 U.S. gal/h

Recovery at 67 ºC Temperature Rise

 N/A 1682 L/h

Recovery at 130 ºF Temperature Rise

 N/A 410 U.S. gal/h

Recovery at 72 ºC Temperature Rise

 N/A 1553 L/h

Recovery at 140 ºF Temperature Rise

 N/A 381 U.S. gal/h

Recovery at 78 ºC Temperature Rise

 N/A 1442 L/h

Maximum Delivery

Maximum Delivery at 100 ºF (5 Minutes)

 N/A 107 U.S. gal

Maximum Delivery at 55.6 ºC (5 Minutes)

 N/A 407 L

Maximum Delivery at 100 ºF (10 Minutes)

 N/A 152 U.S. gal

Maximum Delivery at 55.6 ºC (10 Minutes)

 N/A 575 L

Maximum Delivery at 100 ºF (15 Minutes)

 N/A 196 U.S. gal

Maximum Delivery at 55.6 ºC (15 Minutes)

 N/A 743 L

Maximum Delivery at 100 ºF (20 Minutes)

 N/A 241 U.S. gal

Maximum Delivery at 55.6 ºC (20 Minutes)

 N/A 911 L

Maximum Delivery at 100 ºF (30 Minutes)

 N/A 330 U.S. gal

Maximum Delivery at 55.6 ºC (30 Minutes)

 N/A 1248 L

Maximum Delivery at 100 ºF (45 Minutes)

 N/A 463 U.S. gal

Maximum Delivery at 55.6 ºC (45 Minutes)

 N/A 1752 L

Maximum Delivery at 100 ºF (60 Minutes)

 N/A 596 U.S. gal

Maximum Delivery at 55.6 ºC (60 Minutes)

 N/A 2257 L

Maximum Delivery at 100 ºF (120 Minutes)

 N/A 1130 U.S. gal

Maximum Delivery at 55.6 ºC (120 Minutes)

 N/A 4276 L

Maximum Delivery at 100 ºF (180 Minutes)

 N/A 1663 U.S. gal

Maximum Delivery at 55.6 ºC (180 Minutes)

 N/A 6294 L

Minimum to Recovery Contents

 N/A 10

Dimensions

Schematic

 N/A
Schematic Drawing for Xtreme™ Low NOx High-Input, Fast Recovery Commercial Water Heaters

Dimension A

 N/A 74.5 in1892 mm

Dimension B

 N/A 68 in1727 mm

Dimension C

 N/A 30 in768 mm

Dimension D

 N/A 25 in635 mm

Dimension E

 N/A 10 in254 mm

Dimension F

 N/A 59 in1509 mm

Dimension G

 N/A 1 in25.4 mm

Clearances to Combustibles

Side Clearance to Combustibles

 N/A 4 in102 mm

Rear Clearance to Combustibles

 N/A 4 in102 mm

Top Clearance to Combustibles

 N/A 12 in305 mm

Minimum Front Clearance Size

 N/A 18 in457 mm

Features and Benefits

Features and Benefits

 N/A Xtreme™ is an advanced line of fast recovery commercial gas water heaters. These products can deliver up to 756 gallons per hour at 100 degree F rise. The small jacket diameter makes it a popular choice for retro fits and it is a versatile choice for new construction. Models range from 500,000-715,000 Btu/h, with a maximum temperature setting of 180 degrees Fahrenheit.

Space Saver Design
Xtreme™ maximizes installation adaptability by offering models with front and rear inlet/outlet water connections. Short heights and small jacket diameters result in greater installation flexibility.

System Sentinel™ LED Diagnostic System
Our exclusive diagnostic system, with glowing LED lights, verifies system operation sequence by sequence.

Patented Multi-Flue Tank Design
Proprietary steel formulation, patented multi-flue design, and two coats of high temperature porcelain enamel maximize corrosion resistance and result in a superior heat exchanger design.

Automatic Flue Damper
Low profile design minimizes overall product height. Heavy duty vent hood supports are designed to withstand rigors of installation.

Specialized Burner Assembly
Each model features five premix burners mounted into a metal face plate and sealed with a Fluoroelastomer gasket. Patented "quick release" manifold for easier service.

Direct Spark-to-Pilot Ignition System
Energy saving ignition that ignites pilot only when there is a call for heat.

Round Premix Burners
Precision burners are formed from high chromium stainless steel.

Low NOx Emissions
GX90-550 and GX90-640 meet low NOx emissions of less than 40 ng/J.

Full-port, Full-flow Drain Valve
Factory installed brass drain valve allows for faster draining and servicing.

Anode Rods
Patented design utilizes multiple magnesium rods to ensure long life and corrosion resistance.

Insulation
Sag and moisture proof fiberglass insulation surrounds the storage tank to minimize heat loss.

Hand-Hole Cleanout
It's perfect for removal of lime/sediment deposits.

Manual Reset High Limit
All models are factory equipped with a manual reset high limit to meet the code requirements of many states.

Gas Control System
The fully adjustable thermostat ranges from 100 ºF to 180 ºF and 24 volt combination gas valve includes main gas pressure regulation, On-Off manual valve, 120/24 volt transformer, and high limit temperature cut-out.

General Information

General Information

 N/A Efficiency
All models have been tested according to ANSI test procedures, and exceed the thermal efficiency and standby loss requirements of current ASHRAE standards (Part of the Federally mandated Energy Policy Act (EPact)). Also exceeds energy efficiency codes of all states.

Safety and Construction
These products are design certified by U.L.:
  • For operation at 180 ºF.
  • To meet all safety and construction requirements of ANSI Z-21.10.3-2001.
  • As an automatic storage or instantaneous water heater.
  • As an automatic circulating tank water heater.
  • For operation on combustible floors and in alcove installations.
Certified for 150 psi maximum working pressure (160 psi for ASME models).

Testing and Certifications

Testing and Certifications

 N/A Altitude Certifications
Standard Natural and LP models are certified up to 2,000 feet. High altitude models, 8,000 feet

CSA/ASME Rated T&P Valve
Factory installed relief valve

Warranty

Warranty

 N/A
  • 3-Year Limited Tank Warranty.

Note

Note

 N/A Recovery ratings are based on thermal efficiencies obtained in a CSA certified laboratory. Recovery rate shown on the rating plate (80%) Thermal Efficiency in accordance with ANSI Z21.10.3 labeling requirements. (A) indicates available ASME model.

All models require a 120 V power source. (A) Suffix indicates ASME tank construction available.

Allow a minimum of 18" (457 mm) front clearance for servicing.
2.5 Amps.