Rheem Water Heater RTG2 42PV User Guide

Rheem Tankless Indoor  
Gas Water Heaters  
Available in 4.2, 5.3 and 7.4 GPM Indoor 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  
Compact, space saving design  
from the out-of-the-box 120 degrees – up to a 140  
Intelligent electronic controls designed to increase energy  
degree maximum (additional remote control thermostats are available  
– sold separately)  
New! EZ-Linkcable connects two tankless  
units to operate as one – now available for high  
demand applications  
efficiency and safety  
Self diagnostic program  
Digital display shows temperature setting and  
maintenance codes  
Built-in electric blower  
Exclusive! Guardian SBTsensing burner technology  
Exclusive! Guardian OFWoverheat film wrap  
Exclusive! Two high-altitude options – up to 6,560 or  
Uses Category III stainless steel vents and vent  
horizontally or vertically  
Supplied with a 120 volt power cord  
Environmentally friendly Low NOx burner meets  
SCAQMD rule 1146 requirements  
9,840 ft. elevations above sea level (altitude chip required  
– sold separately)  
Exclusive! All Rheem tankless models are third-party  
certified by GAMA  
*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.  
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 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;  
Energy saving design  
LP $1.23/gallon  
.
DESCRIPTION  
FEATURES  
ROUGHING IN DIMENSIONS (SHOWN IN INCHES)  
ENERGY INFO.  
D.O.E.  
GAS  
WATER FLOW RATE  
GPM @ 77° GPM @ 45°  
RISE MAX. RISE MAX.  
SHIP.  
WEIGHT  
(LBS.)  
INPUT  
BTU/HR.  
TEMP.  
RANGE*  
CONNECTION  
VENT  
DIAMETER  
ENERGY  
ANN.  
MODEL NUMBER  
TYPE  
HEIGHT  
WIDTH  
DEPTH  
FACTOR  
OP. COST  
WATER  
GAS  
21,500 -  
118,000  
100° to  
140° F  
$165 Nat  
$244 LP  
RTG2-42PVN†  
RTG-53PVN†  
Indoor  
2.4  
3.1  
4.3  
4.2  
5.3  
7.4  
3/4  
3/4  
20-1/2 13-3/4  
20-1/2 13-3/4  
25-3/8 14-7/8  
5-1/4  
3
3
4
35  
36  
55  
.83  
21,600 -  
100° to  
140° F  
$167 Nat  
$246 LP  
Indoor  
Indoor  
3/4  
3/4  
3/4  
3/4  
5-1/4  
.82  
.82  
145,000††  
19,000 -  
199,900  
100° to  
140° F  
$167 Nat  
$246 LP  
RTG-74PVN-1†  
11-1/8  
Available in Natural Gas and Propane (LP). For Propane replace the N  
Proper gas pressure must be ensured to supply tankless gas water heaters – up to  
118,000 BTU for RTG2-42 models, up to 145,000 BTU for RTG-53 models, and up to  
199,900 BTU for RTG-74 models. (Consult your gas supplier)  
with a P when ordering.  
141,000 LP  
††  
* Factory set maximum temperature is 120° F.  
Temperature Rise (°F)  
35° 45° 50° 60° 70° 77° 80° 90° 100°  
RTG2-42PV Water Flow (GPM) 5.5 4.2 3.8 3.2 2.7 2.5 2.4 2.1 1.9  
RTG-53PV Water Flow (GPM) 6.8 5.3 4.7 3.9 3.4 3.1 3.0 2.6 2.4  
RTG-74PV Water Flow (GPM) 8.5 7.4 6.6 5.5 4.7 4.3 4.1 3.7 3.3  
• 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.  
Model Number  
Installation vent kits available  
Kits include components required for horizontal through the wall termination.  
RTG20003 – 3" diameter for RTG2-42PV and RTG-53PV models.  
RTG20007 – 4" diameter for RTG -74PV models.  
Above estimates are for sizing purposes only.  
These units are designed to meet  
or exceed ANSI (American National  
Models vent horizontally  
or vertically  
Standards Institute) requirements and have  
been tested according to D.O.E. test proce-  
dures and meet or exceed the energy effi-  
ciency requirements of NAECA, ASHRAE  
standard 90, ICC Code and all state energy  
efficiency performance criteria for energy  
consuming appliances.  
This water heater has a built-in electric blower to force  
exhaust gas to the outside. Category III stainless steel  
vent is (UL1738 certified) required. Maximum vent  
length for RTG2-42PV models is 36 feet 2 inches  
including one 90° elbow. Maximum vent length for  
RTG-53PV models is (not final) including one 90°  
elbow. Maximum vent length for RTG-74PV models is  
47 feet 6 inches including one 90° elbow.  
Before purchasing this appliance, read  
important energy cost and efficiency  
information available from your supplier.  
Type “B” vents are not permitted.  
Venting side wall  
from side  
Venting side wall  
from back  
In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.  
Rheem Water Heating • 101 Bell Road, Montgomery, Alabama 36117-4305 • www.rheem.com  
PRINTED IN U.S.A  
07/06 WP  
FORM NO. 101-21 Rev. 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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