Rheem Xtreme GX90-550 - Manual

(On Selected
Models)
GX90-550 and
GX90-640 Comply
With SCAQMD
Rule 1146.2 for
Low NOx Emissions
Small
Jacket Diameters
Short Floor-to-Vent
Heights
Multiple Water
Connection Options
• 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.
• 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.
• 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.
• 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.
• 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.
• Full port, full flow brass drain
valve
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:
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.
• 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).
Continued next page.