Rheem Low NOX User Manual

Low NOx Universal Gas Commercial Water Heaters
Available in Sizes Ranging From 35 - 100 Gallon Tank-Type Models

125,000 BTU/Hr. thru 400,000 BTU/Hr.
Universal Low NOx 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:
• Universal tank design –
maximizes installation adaptability
by offering models with Top, Front
Side and Rear Side Inlet/Outlet
water connections.
• Universal space saver design –
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. New heavy duty
vent hood supports are designed
to withstand rigors of installation.
• 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
• Low NOx Burner – The Power
Assist enclosed burner design
incorporates stainless steel multi-
port burner tubes for long term
Low NOx compliant performance.
A sight glass allows for burner
observation and the entire
assembly is easily removable.
A blower guard is provided
against post-installation damage.
The entire design is highly
resistant to the effects of negative
air pressures common to modern
commercial buildings.
Certifications and Ratings:
• Efficiency – these models have been tested according to ANSI test
procedures, and exceed the thermal efficiency and standby loss
requirements of ASHRAE (Part of the Federally mandated Energy Policy
Act (EPact)). Also exceeds energy efficiency codes of all states including
California Energy Commission (CEC).
• Safety and construction – these products are design certified by the
CSA: a) For operation at 180°F. b) To meet all safety and construction
requirements of ANSI Z21.10.3. c) As an automatic storage or instanta-
neous water heater. d) As an automatic circulating tank water heater.
e) For operation on combustible floors and in alcove installations.
All models are North Carolina Code compliant.
CERTIFIED FOR A 150 PSI MAXIMUM WORKING PRESSURE
(160 PSI FOR ASME MODELS).
• Optional constructions – ASME construction is available on designated
models.
Continued next page.
Complies With
SCAQMD Rule 1146.2
For Low NOx
Emissions
Small Jacket
Diameters
Short
Floor-to-Vent
Heights
Multiple
Water Connection
Options
(On Selected
Models)

Rheem Low NOX Specifications

General

Category	Water Heater
Type	Storage
Fuel Type	Natural Gas
Energy Factor	0.62
Recovery Rate	40 gallons/hour
Tank Capacity	50 gallons
Height	60 inches
Diameter	22 inches
Weight	160 lbs
Warranty	6 or 10 years (limited)

Summary

Construction Features

Universal Tank Design

Maximizes installation adaptability by offering models with Top, Front, Side and Rear Side Inlet/Outlet water connections.

Universal Space Saver Design

Short heights and small jacket diameters result in greater installation flexibility.

Patented Multi-Flue Tank Design

Proprietary steel, multi-flue design, and porcelain enamel for superior heat exchanger.

Low Profile Automatic Flue Damper

Minimizes overall height and supports heavy-duty vent hood for installation rigors.

Spark-To-Pilot Ignition System

Provides reliable, energy-saving ignition sequencing only when the thermostat calls for heat.

System Sentinel™ LED Diagnostic System

Exclusive diagnostic system with LEDs verifying operation sequence by sequence.

Full Port, Full Flow Brass Drain Valve

Features a brass drain valve for efficient water removal.

Low NOx Burner

Enclosed burner design with stainless steel tubes for Low NOx performance.

Certifications and Ratings

Efficiency

Tested to ANSI procedures, exceeds ASHRAE, EPact, and CEC energy codes.

Safety and Construction

CSA design certified for operation, safety, and construction requirements.

Optional Constructions

ASME construction available on designated models for higher pressure ratings.

Product Specifications

Recovery Capacities

Provides recovery capacities at 80% thermal efficiency for various temperature rises.

Clearance to Combustibles

Specifies required side, rear, and top clearances to combustible materials.

First Time Delivery

Details useable storage and recovery for indicated times at 100°F temperature rise.

Dimensions

Lists overall dimensions (A-H) and water connection sizes for each model.

Approximate Shipping Weight

Provides standard and ASME shipping weights for each model.

Limited Warranty