Rheem RTH-74XN-1, RTH-53XN User Manual

Rheem Tankless Outdoor Gas Water Heaters
Available in 5.3 and 7.4 GPM Outdoor Models
10-Year Limited Warranty on Heat Exchanger*
3-Year Limited Warranty on Parts*
New! UMC-117 remote control is included and can be set
from the out-of-the-box 120 degrees – up to a 140 degree maximum
– sold separately)
New! EZ-Link
cable connects two tankless units to operate as one – now available for high demand applications
Exclusive! Guardian SBT
sensing burner technology
Exclusive! Guardian OFW
overheat film wrap
Exclusive! Two high-altitude options – up to 6,560 or
9,840 ft. elevations above sea level (altitude chip required
– sold separately)
Exclusive! All Rheem tankless models are third-party
certified by GAMA
Exclusive! All Rheem tankless models qualify for up to a
$300 federal energy tax credit (refer to your tax advisor for details)
Exclusive! All Rheem models can be linked in up to 20
unit manifold installations by using the optional MIC-180 and MICS-180 manifold control assembly
Continuous hot water
Energy saving design
Compact, space saving design
Intelligent electronic controls designed to increase energy
efficiency and safety
Self diagnostic program
Digital display shows temperature setting and
maintenance codes
Built-in electric blower
Environmentally friendly Low NOx burner meets
SCAQMD rule 1146 requirements
Features freeze protection to -30°F on RTG-74,
-20° F on RTG-53
Rheem Water Heating • 101 Bell Road, Montgomery, Alabama 36117-4305 • www.rheem.com
PRINTED IN U.S.A 07/06 WP FORM NO. 101-41
In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.
These units are designed to meet or exceed ANSI (American National Standards Institute) requirements and have been tested according to D.O.E. test proce­dures and meet or exceed the energy effi­ciency requirements of NAECA, ASHRAE standard 90, ICC Code and all state energy efficiency performance criteria for energy consuming appliances.
Before purchasing this appliance, read important energy cost and efficiency information available from your supplier.
DESCRIPTION FEATURES ROUGHING IN DIMENSIONS (SHOWN IN INCHES) ENERGY INFO.
GAS WATER FLOW RATE SHIP. D.O.E.
INPUT TEMP.
GPM @ 77° GPM @ 45°
CONNECTION VENT WEIGHT ENERGY ANN.
MODEL NUMBER BTU/HR. TYPE RANGE*
RISE MAX. RISE MAX. WATER GAS
HEIGHT WIDTH DEPTH DIAMETER (LBS.) FACTOR OP. COST
RTG-53XN
21,600 -
Outdoor
100° to
3.1 5.3 3/4 3/4 20-1/2 13-3/4 5-1/4 N/A 36 .82
$167 Nat
141,000 140° F $246 LP
RTG-74XN-1
19,000 -
Outdoor
100° to
4.3 7.4 3/4 3/4 25-3/8 14-7/8 11-1/8 N/A 55 .82
$167 Nat
199,900 140° F $246 LP
Available in Natural Gas and Propane (LP). For Propane replace the N with a P when ordering.
* Factory set maximum temperature is 120° F.
• For installations above 3,280 feet a high altitude chip is required. Refer to Rheem price list or consult factory for details.
• Consult factory for information on sizing the application.
Temperature Rise (°F)
Model Number 35°
45° 50° 60° 70° 77° 80° 90° 100° RTG-53X Water Flow (GPM) 6.8 5.3 4.7 3.9 3.4 3.1 3.0 2.6 2.4 RTG-74X Water Flow (GPM) 8.5 7.4 6.6 5.5 4.7 4.3 4.1 3.7 3.3
Above estimates are for sizing purposes only.
Proper gas pressure must be ensured to supply tankless gas water heaters – up to 145,000 BTU for RTG-53 models and up to 199,900 BTU for RTG-74 models. (Consult your gas supplier)
*See Residential Warranty Information Brochure for complete warranty information.
If the water heater is installed anywhere other than a single family dwelling, such as a commercial application, or in any system in which the water is recirculated, the applicable warranty periods will be limited to one (1) year.
Energy Factor and Average Annual Operating Costs based on D.O.E. (Department of Energy) test procedures. D.O.E. national average fuel rate natural gas 91¢/therm; LP $1.23/gallon
.
Recess Box for Rheem Tankless Outdoor Units Now Available
Contact your wholesale or local Rheem representative for the recess box that meets your application.
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