Specification Sheet

PRINTED IN U.S.A. 01/17 WP FORM NO. TKE-101
2
Rheem.com
[e-mail] • Toll Free 800.374.8806
Manufacturers National Service Department
400 Captain Neville Road, Waterbury, CT 06705
INTEGRATED HOME COMFOR
T
INTEGRATED HOME COMFORT
In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.
Specifications
Water
INTEGRATED HOME COMFORT
Residential Electric
Professional Classic
Tankless Water Heaters
* 240V units can be used on 208V single phase with 25% reduced temperature output. Please note per UL standards the rating plate and installation instructions will all be according to a
240V applied voltage. Check with local officials prior to derating the electrical infrastructure.
DESCRIPTION FEATURES ROUGHING IN DIMENSIONS (SHOWN IN INCHES)
MODEL NUMBER kW AMPS
RECOMMENDED
BREAKER
SIZE VOLTAGE
RECOMMENDED
WIRE SIZE (CU)
MIN.
FLOW
(GPM)
MAX.
FLOW
(GPM) HEIGHT WIDTH DEPTH
WATER
CONN.
SHIP
WEIGHT
(LBS.)
120V 1 HEATING CHAMBER
RTEX-04 3.5 29A (1x30)A 120 10 AWG 0.3 4.8 5-7/8 10-7/8 2-3/4 1/2 NPT 4.5
240V* 1 HEATING CHAMBER
RTEX-06 5.5 29A (1x30)A 220 10 AWG 0.3 4.8 5-7/8 10-7/8 2-3/4 1/2 NPT 4.5
RTEX-08 8.0 33A (1x40)A 240 8 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 7
RTEX-08 (derated 208V performance)* 5.8 28A (1x40)A 208 8 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 7
RTEX-11 11.0 46A (1x50)A 240 6 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 8.5
RTEX-11 (derated 208V performance)* 8.2 29A (1x50)A 208 6 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 8.5
RTEX-13 13.0 54A (1x60)A 240 6 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 8.5
RTEX-13 (derated 208V performance)* 10.1 49A (1x60)A 208 6 AWG 0.3 4.8 12-5/8 8-1/4 3-5/8 1/2 CF 8.5
240V* 2 HEATING CHAMBERS
RTEX-18 18.0 75A (2x40)A 240 8 AWG 0.3 7.0 18-1/4 14-1/2 3-1/2 3/4 NPT 14.78
RTEX-18 (derated 208V performance)* 13.3 64A (2x40)A 208 8 AWG 0.3 7.0 18-1/4 14-1/2 3-1/2 3/4 NPT 14.78
240V* 3 HEATING CHAMBERS
RTEX-24 24.0 100A (3x40)A 240 8 AWG 0.3 7.0 18-1/4 17-5/8 3-1/2 3/4 NPT 17.8
RTEX-24 (derated 208V performance)* 17.5 84A (3x40)A 208 8 AWG 0.3 7.0 18-1/4 17-5/8 3-1/2 3/4 NPT 17.8
RTEX-27 27.0 112A (3x40)A 240 8 AWG 0.3 7.0 18-1/4 17-5/8 3-1/2 3/4 NPT 17.8
RTEX-27 (derated 208V performance)* 20.0 96A (3x40)A 208 8 AWG 0.3 7.0 18-1/4 17-5/8 3-1/2 3/4 NPT 17.8
240V* 4 HEATING CHAMBERS
RTEX-36 36.0 150A (4x40)A 240 8 AWG 0.3 8.0 18-1/4 21-5/8 3-1/2 3/4 NPT 22.7
RTEX-36 (derated 208V performance)* 26.6 127A (4x40)A 208 8 AWG 0.3 8.0 18-1/4 21-5/8 3-1/2 3/4 NPT 22.7
Rated Pressure 25 PSI min., 150 PSI max.
Certifications ETL Listed to UL 499 and CSA
Std. Temp. Settings 120°F (Adjustable 80°F-140°F)
Temp. Accuracy +/–1° at steady state flow
Turn-On 0.3 GPM
Product
Specifications
(all models)
RHEEM PART
NUMBER
GPM RATING OF
INSERTS PROVIDED
CONNECTION
SIZE
RTE10001A 1.0, 1.5, 2.0 1/2" NPT
RTE10001B 2.0, 3.0, 4.0, 5.0 3/4" NPT
Optional Inline Flow Regulator
• Enhanced outlet temperature control
• Install on the outlet side of the heater
• Limit maximum volume to the specified flow rate to ensure
exiting temperature is within an acceptable range
• Flow Regulators for ½" and ¾" plumbing connections
• Flow range: 1 to 5 gallons per minute
Suggested Sizing Guide
COLD CLIMATE
(INLET TEMP.
35-45°F)
WARM CLIMATE
(INLET TEMP.
50-60°F)
HOT CLIMATE
(INLET TEMP.
65-75°F)
RTEX-04 N/A N/A N/A
RTEX-06 N/A N/A N/A
RTEX-08 RTE10001A RTE10001A RTE10001A
RTEX-11 RTE10001A RTE10001A RTE10001A
RTEX-13 RTE10001A RTE10001A RTE10001A
RTEX-18 RTE10001B RTE10001B RTE10001B
RTEX-24 RTE10001B RTE10001B RTE10001B
RTEX-27 RTE10001B RTE10001B RTE10001B
RTEX-36 RTE10001B RTE10001B RTE10001B
Selection based on inlet temperature and an outlet temperature setting of 105°F
Suggested Specifications
Unit shall have copper clad immersion heating element(s) with brass
terminations for increased durability. External temperature control
and display adjustable in 1° increments with a range of 80°-140°F.
Display shall be capable of displaying setpoint temperature in
Celsius or Fahrenheit temperature scales. Unit shall utilize a flow
meter with a 0.3 gpm activation point and manage power based on
actual flow rate and inlet temperature. Values should be processed
60 times per second. Unit shall be WQA certified lead free, certified
to UL499 and CSA22.2.