Xtreme
High-Input Gas Commercial Water Heaters
ꢀAvailable in 90 Gallon Tank-Type Models
550,000 BTU/Hr. thru 715,000 BTU/Hr.
Xtreme Gas Commercial Water Heaters are specifically designed to
minimize the difficulty of replacing failed water heaters and are versatile for
new installations. These products are designed for applications requiring
large quantities of hot water.
Construction Features:
• Space saving tank design –
maximizes installation adaptability
by offering models with front side
and rear side inlet/outlet water
connections. Short heights and
small jacket diameters result in
greater installation flexibility.
• Specialized burner
assembly –
each model features five premix
burners mounted into a metal face
plate and sealed with a Viton
gasket. Patented “quick release”
manifold for easier service.
• Patented multi-flue tank design
– proprietary steel formulation,
patented multi-flue design, and
two coats of high temperature
porcelain enamel to maximize
corrosion resistance result in a
superior heat exchanger design.
• Spark-To-Pilot ignition system –
Standard on all models. Provides
reliable and energy saving ignition
sequencing by igniting the pilot
only when the thermostat calls
for heat.
• System Sentinel™ LED
diagnostic system –
Our exclusive diagnostic system,
with glowing LED lights, verifies
system operation sequence
by sequence.
• Low profile automatic flue
damper –
low profile design minimizes over-
all product height. Heavy duty vent
hood supports are designed to
withstand rigors of installation.
GX90-550 and
GX90-640 Comply
With SCAQMD
Rule 1146.2 for
• Full port, full flow brass drain
valve
Low NO Emissions
x
Small
Jacket Diameters
Short Floor-to-Vent
Heights
Certifications and Ratings:
• Efficiency – these 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.
Multiple Water
Connection Options
• Safety and construction – These products are design certified by U.L.:
a) For operation at 180°F. b) To meet all safety and construction
requirements of ANSI Z21.10.3-2001 c) As an automatic storage or
instantaneous water heater. d) As an automatic circulating tank water
heater. e) For operation on combustible floors and in alcove installations.
CERTIFIED FOR A 150 PSI MAXIMUM WORKING PRESSURE
(160 PSI FOR ASME MODELS).
(On Selected
Models)
Continued next page.
Xtreme Gas continued.
DIMENSIONAL DIAGRAM
C
E
CLEARANCES TO
COMBUSTIBLES
MODEL
T&P
NUMBER
UNITS
inches
mm
SIDE
4
REAR TOP
OUTLET
FRONT SIDE
GX90-550
4
102
4
12
305
12
305
12
305
12
305
12
305
12
305
102
4
GX90-640
GX90-715
GX90-500
GX90-600
GX90-680
inches
mm
102
102
inches
mm
4
4
102
4
102
4
F B A
INLET
FRONT SIDE
inches
mm
102
102
inches
mm
4
4
102
4
102
4
inches
mm
SYSTEM
102
102
SENTINEL
Allow a minimum of 18" (457mm) front clearance
for servicing.
2.5 Amps.
D
G
Xtreme Gas continued.
Other Features:
• Insulation – sag and moisture proof fiberglass
insulation surrounds the storage tank to
minimize heat loss.
• Manual reset high limit – all models are factory
equipped with a manual reset high limit to meet the
code requirements of many states.
• Anode rods – patented design utilizes multiple
magnesium rods to ensure long life and
corrosion resistance.
• Gas control system – fully adjustable thermostat
from 100°F to 180°F, 24 volt combination gas valve
includes main gas pressure regulation,
On-Off manual valve, 120/24 volt transformer, and
high limit temperature cut-out.
• Temperature and pressure relief valve –
AGA/ASME rated and factory installed.
•
Round premix burners – precision burners are
formed from high chromium stainless steel.
• Hand-hole cleanout – for removal of lime/
sediment deposits.
Recommended Specifications (for trade reference only)
Water heater(s) shall be XTREME model ________________, manufactured by RHEEM-RUUD, having gas input
of __________ Btu/hr. and a recovery rate of _____________ GPH at a 100°F temperature rise when tested and
certified at ____________ thermal efficiency. Water heater(s) shall have a storage capacity of 90 gallons. Water
heater(s) shall have the U.L. seal of certification and supplied with a factory installed AGA/ASME rated temperature
and pressure relief valve. Tank(s) shall be furnished with a tube bundle having a double coating of high temperature
porcelain enamel and furnished with magnesium anode rods rigidly supported. Water heater(s) shall meet or
exceed the thermal efficiency and standby loss requirements of current ASHRAE standards. Tanks shall have a
working pressure rating of 150 psi, and shall be completely factory assembled, including a pressure regulator
properly adjusted for operation on ___________ gas with chromium stainless steel burners. Controls will be
arranged for safety shutoff in event of pilot failure. Water heater(s) shall have front and rear side inlet/outlet water
connections. Water heater(s) shall be covered by a three year limited warranty against tank leaks.
Add “A” for ASME construction
Water heater(s) shall be constructed in accordance with the requirements of the ASME Boiler and Pressure Vessel
Code, Section IV Part HLW.
Limited Warranty
This product features a three year limited warranty against tank leaks. Please refer to Commercial
Warranty Information brochure for complete warranty information.
In keeping with its policy of continuous progress and product improvement, Rheem-Ruud reserves the right to make changes without notice.
Rheem Canada Ltd./Ltée,128 Barton Street West, Hamilton, Ontario L8N 3P3
PRINTED IN U.S.A
07/07 WP
FORM NO. RR102C-15 Rev. 4
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