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Electric Tankless

Water Heater

Keep this manual near the water heater for future reference whenever maintenance, adjustment or service is required.

Retain your original receipt as proof of purchase.

IMPORTANT SAFETY INFORMATION ............................. 2
GENERAL INFORMATION ............................................... 5
INSTALLATION ............................................................... 11
OPERATION ................................................................... 15
TROUBLESHOOTING .................................................... 17
SERVICE ......................................................................... 22
WIRING DIAGRAMS ..................................................... 29
APPENDIX ...................................................................... 34

Table of Contents ..............................Page

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°C

ENTER

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ENTER

PLEASE DO NOT RETURN THIS UNIT TO THE
STORE.

Read this manual and the labels on the water heater before you install,
operate, or service it. If you have di

ﬃ

culty following the direc ons, or

aren’t sure you can safely and properly do any of this work yourself:

• Call our Technical Support Hotline:

United

States: 1-877-817-6750

Canada:

1-800-265-8520

  We can help you with installation, operations, troubleshooting, or
  maintenance. Before you call, write down the model and serial number from
  the water heater’s data plate.

• Incorrect

installa on, opera on, or service can damage the water heater, your

house and other property, and present risks including

fi

re, scalding, electric

shock, and explosion, causing serious injury or death.

0618

100306524_2000558984 (REV. A)

Installa on Instruc ons
and Use & Care Guide

1
2
3
...
»

Содержание RPV series

Страница 1: ...e you install operate or service it If you have di culty following the direc ons or aren t sure you can safely and properly do any of this work yourself Call our Technical Support Hotline United State...

Страница 2: ...t remove any permanent instruc ons labels or the data plate from either the outside of the water heater or on the inside of the access panels Keep this manual near the water heater DANGER Read and fol...

Страница 3: ...he tap Mixing valves are available at your local hardware store or from your plumbing supplier Follow the manufacturer s instructions for installation and adjustment of the valves For all models the t...

Страница 4: ...r heater s cover is in place This cover keeps debris from entering and potentially being ignited and helps keep any internal fires from spreading Keep the water heater from becom ing wet Immediately s...

Страница 5: ...emperature and pressure relief valve T P valve However some local codes do require the installation of a T P Valve If a T P valve must be installed install it on the hot outlet pipe according to the v...

Страница 6: ...Figure 7 page 16 Component Identification Four Chamber Models R4L C4L R4M C4M Inlet Thermistor connects to TH IN INLET L1 L2 TH 1 TH 3 TH 4 Intermediate Thermistor connects to TH 1 TH 2 TH IN L1 L2 TH...

Страница 7: ...es the distance from the bottom of the heater to the highest point of the inlet outlet Width dimension includes the mounting tabs on the left hand and right hand sides two and four chamber models NOTE...

Страница 8: ...sorted by Voltage then by Wattage per Element Model Recommended Breaker Size Amps Voltage Number of Elements Wattage per Element KW Current per Breaker Amps Recommended Wire Size AWG Element Type P 2...

Страница 9: ...AWG This model may used with a 208 VAC supply Use of 208 VAC may require different breaker and or wire sizes Follow all code requirements Two Chamber Models For potable water heating only Not for spac...

Страница 10: ...Breaker Amps Recommended Wire Size AWG Element Type 4 280 X5 70 amps each 2 cirucits 208 4 7 67 31 6 Single 4 180 E5 40 amps each 2 circuits 240 4 4 5 37 50 8 Single 4 220 E5 50 amps each 2 circuits...

Страница 11: ...lumbing heating and air conditioning codes during installation 1 Choose a Location Your water heater is designed to be installed indoors only Locate your water heater in a clean dry area that is as cl...

Страница 12: ...the four mounting holes in the back plate If you have a two or four chamber model there are two mounting tabs on each side of your water heater 6 Two or four chamber water heaters only Apply one stand...

Страница 13: ...ape NOTICE Failure to purge air from the water lines can leave air pockets causing damage to the heating elements when power is applied 4 Install Electrical Service WARNING Failure to observe these wa...

Страница 14: ...tage wiring size ampacity circuit breaker rating and type are correct Refer to Electrical Requirements which starts on page 8 Label all breakers connections to the water heater 6 Ensure that all air h...

Страница 15: ...erature turn the knob to the right clockwise Use a small flat blade screwdriver to turn the knob The water temperature set point can be adjusted within a range of 90 F 32C and 140 F 60 C Two or four c...

Страница 16: ...d Celsius 1 Press and hold the DOWN button for five seconds See Figure 7 2 The F or C LED will illuminate and the 7 segment LED will display the temperature set point in the appropriate units F C ENTE...

Страница 17: ...ensor Failure The 22 code would be displayed like this 2 2 2 red flashes pause two red flashes pause green flash A er you iden fy the code locate its descrip on and solu on in the table Flash Code Seq...

Страница 18: ...ature rise water is not being heated su ciently Check elements Check temperature sensors Check wiring and circuit breakers Verify proper heater sizing If necessary reduce the unit tem perature from ma...

Страница 19: ...n water runs uninterrupted from the hot water fixture turn on power to the water heater E04 Moisture leak detected in heater Turn o power and water supply to the water heater Contact Technical Support...

Страница 20: ...Temperature Sensor Replacement on page 25 E20 Inlet thermistor shorted Replace the temperature sensor that is listed in the le hand column See Thermistor Temperature Sensor Replacement on page 25 E21...

Страница 21: ...is cold Flow is too high Reduce flow High temperature limit switch may be tripped Verify if limit switch is tripped Reset if tripped The circuit breaker s may be tripped Check power panel Reset break...

Страница 22: ...ff Some models are connected to more than one branch circuit Disconnect all branch circuits before servicing unit Check wires with a non contact circuit tester to make sure power is o When you are fin...

Страница 23: ...ter use C Disconnect the green ground wire from the heating element See Figure 14 It is secured with a spade connector Pull it straight up from the element to slide it off the terminal Figure 14 Eleme...

Страница 24: ...sing See above Grommets Outlet Inlet Flat 7 Two or four chamber water heaters only 7 1 Drain the two or four chamber water heater A Remove all six screws that secure the access plate beneath the eleme...

Страница 25: ...r and pipes If a T P valve is installed operate it manually several times to allow any trapped air to escape 10 Check for water leaks Correct any leaks that are found NOTICE Do not restore power until...

Страница 26: ...nlet thermistor TH 1 Intermediate thermistor TH 2 Outlet thermistor Thermistor Connections Often referred to as a temperature sensor L1 L2 TH 1 TH 2 TH IN Intermediate Thermistor connects to TH 1 Outl...

Страница 27: ...s cool WARNING Be sure the water runs cool before draining the water heater to reduce the risk of scalding 3 Close the inlet valve to the water heater but leave the hot water faucet open to relieve pr...

Страница 28: ...estore power until the circuit board and components are completely dry If water has dripped anywhere inside the heater dry it with a hair dryer or compressed air Be sure to dry behind the circuit boar...

Страница 29: ...S ONLY WHEN CONNECTING TO ELECTRICAL SERVICE GRND L2 L1 Ground G R N GRN RED BLK GRN Power Supply RED BLK GRN RED BLK The wiring diagrams for various models are listed in this sec on Locate the one th...

Страница 30: ...t RED BLK RED BLK Element RED BLK GRN BLK RED GRN RED BLK USE COPPER CONDUCTORS ONLY WHEN CONNECTING TO ELECTRICAL SERVICE BLK RED GRN Relay 1 Relay 2 GRND L2 TH IN TH AUX TH OUT Moisture Sense Level...

Страница 31: ...ement 2 Element 1 L2 L1 BLK BLK BLK BLK RED RED RED RED RED BLK BLK BLK RED RED BLK RED BLK RED RED RED BLK BLK BLK RED USE COPPER CONDUCTORS ONLY WHEN CONNECTING TO ELECTRICAL SERVICE NOTICE 16 kW an...

Страница 32: ...K RED RED RED RED RED BLK BLK BLK RED RED BLK RED BLK RED RED RED BLK BLK BLK RED USE COPPER CONDUCTORS ONLY WHEN CONNECTING TO ELECTRICAL SERVICE L2 L1 BLK RED BLK BLK CIRCUIT BREAKER A CIRCUIT BREAK...

Страница 33: ...y 3 Relay 5 Relay 7 Display Ground RED BLK GRN Element 1 Element 3 Element 4 Element 2 Element 4 Element 2 Element 1 Element 3 L2 L1 L2 L1 BLK BLK BLK BLK BLK BLK BLK BLK RED RED RED RED RED RED RED R...

Страница 34: ...Your Water Heater page 12 NOTICE Read Minimum Clearances Figure 2 page 11 before you start 1 Complete the installa on steps on pages 11 and 12 Stop when you have completed step 7 on page 12 2 Secure b...

Страница 35: ...e toward the right as shown in Figure 27 page 34 4 Return to page 12 to complete the water heater installation Internal water heater components are represented by hidden lines D Surface Water Heater C...

Страница 36: ...Copyright 2018 A O Smith Corpora on All rights reserved...

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