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Electric Tankless
Water Heater
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 diffi culty following the direc ons, or
aren't sure you can safely and properly do any of this work yourself:
•
Call our Technical Assistance Hotline which is listed on your warranty. We can
help you with installa on, opera ons, troubleshoo ng, or maintenance. Before
you call, write down the model and serial number from the water heater's ra ng
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.
Table of Contents ..............................Page
IMPORTANT SAFETY INFORMATION ............................. 2
GENERAL INFORMATION ............................................... 5
INSTALLATION ................................................................. 8
OPERATION ................................................................... 11
TROUBLESHOOTING ..................................................... 13
MAINTENANCE ............................................................. 16
SERVICE/REPAIR ............................................................ 18
WIRING DIAGRAMS ..................................................... 28
APPENDIX ...................................................................... 30
Keep this manual near the water heater for future reference whenever maintenance, adjustment or service is required.
June, 2024
Installa on Instruc ons
and Use & Care Guide
Retain your original receipt as proof of purchase.
C
US
100378931_2000810930_REV. C
°F
°C
ENTER
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Related Manuals for State Water Heaters UPVS-80Y
Summary of Contents for State Water Heaters UPVS-80Y
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Page 1: Table Of Contents
Installa on Instruc ons and Use & Care Guide Electric Tankless Water Heater 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 diffi culty following the direc ons, or aren’t sure you can safely and properly do any of this work yourself: °F °C... -
Page 2: Important Safety Information
IMPORTANT SAFETY INFORMATION Read and follow all safety messages and instruc ons in this manual. Important informa on to keep... Fill out this sec on and keep this manual for reference. This is the safety alert symbol. It is used to alert you to poten al physical injury hazards. - Page 3 o reduce the risk of property dam- • Use a non-contact circuit tester to Temperature Time to Produce a confirm that power is off before age, serious injury or death, read Serious Burn working on or near any electrical and follow the precau ons below, all la- parts.
- Page 4 To reduce the risk of unusually hot wa- • Keep the water heater from becom- ter reaching the fi xtures in the house, ing wet. Immediately shut the water install Thermosta c Mixing Valves at heater off and have it inspected by each point of use.
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Page 5: General Information
GENERAL INFORMATION Introduction If you install a T&P valve, turn on drainage of both the T&P Relief Valve and the discharge pipe. The discharge the water supply to ensure that no • This manual provides information pipe must not be smaller than the water drips from it. - Page 6 General Specifications Point-of-Use: Models Wiring & Circuit Breaker See “Electrical Requirements” on page 7. Requirements Water Connections 1/2” NPT Weight 2 Chamber 4 Chamber lbs. (kg) 6 lbs. (2.7 kg) full 8 lbs. (3.6 kg) full Water Heater H 12.22” x W 7.65” x D 5.11” Dimensions* (H 31.04cm x W 19.43cm x D 12.98 cm) * Height dimension includes the distance from the bottom of the heater to the highest point of the inlet/outlet.
- Page 7 Electrical Requirements • Follow these steps to determine the electrical requirements for your water heater: 1.) Find your model number on your water heater’s rating plate. 2.) Locate the model number in the table listed below. For example, if your model is UPVA-18K, find *P**-18K. Sorted by Voltage first, then by total Wattage (KW).
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Page 8: Installation
INSTALLATION Getting Started Code Compliance include crawl space under a house or building, in the garage (in Clearances • Install and properly ground the regions prone to high humidity) unit in accordance with local Top Clearance: A minimum of and in the attic (unless the attic codes, or in the absence of local 12 inches (30.5 cm) is required has been converted to a living... - Page 9 3. Remove the screws that secure Connect the Wa- the protective cover. ter Lines 4. Remove the cover. NOTICE: Cold 5. Locate the four mounting holes • DO NOT apply heat to the water in the back plate. Locate and lines, nipples, or any fitting on the use the point-of-us mounting water heater.
- Page 10 Install Electrical 1. Be sure the electrical power to Turn on power to the water the water heater is turned OFF heater. Service at the circuit breaker panel (or 9. Verify proper operation. remove the circuit’s fuses). WARNING! Failure to observe Operating instructions are listed these warnings could lead to an Using a non-contact circuit tester,...
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Page 11: Operation
OPERATION Water Temperature Manually switching between Adjusting Water Temperature modes: Adjustment NOTICE: Water temperatures at the hot water fi xture may be lower than 1. Remove the front cover on the the water heaters set point, depending point-of-use unit by removing the on the distance from the water heaters WARNING two screws from the left and two... - Page 12 Figure 7 - Point of Use Display °F °C Temperature Units (°F or °C) One will be lit if power to the water heater is on. (adjust the set temperature) ENTER (Set) User Interface Module (UIM) Need Assistance? Call our Technical Assistance Hotline at 1-877-817-6750 . We can help you with installa on, opera on, troubleshoo ng, or maintenance.
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Page 13: Troubleshooting
TROUBLESHOOTING Error Codes for Point-of-Use Models WARNING Electric Shock Risk Contact with the electrical parts inside the water heater can result in severe injury or death from electrical shock: • Disconnect power by opening the circuit breaker(s) or removing the fuses before installing or servicing. •... - Page 14 Display Fault Description Action / Solution Code Hardware Error: Turn off power to the water heater and contact Technical Support • An issue with RPM memory is detected. • An issue with heater control circuit is found. • The user fl ash check has failed. •...
- Page 15 Display Fault Description Action/Solution Code Scale Build Up Error - 4 Chamber: Turn off power to the water heater. • Scale has built up inside chamber 3 Drain and Clean the water heater as shown in the Scale Buildup Cleaning or 4.
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Page 16: Maintenance
MAINTENANCE Routine Maintenance Accessing Heating Front View Side View (Right) Elements Routine maintenance will help your water heater last longer and function Confi rm that power is off by properly. If you cannot perform °F °C checking the wires with a these routine maintenance tasks ENTER non-contact circuit tester. - Page 17 With the element wires out Cleaning Hea ng Chamber Element of the way, use a Phillips Elements and screwdriver to remove the Alignment Notch Chambers two moun ng screws securing the element in the chamber. Place the p of a fl at head screwdriver between IMPORTANT! At least annually, the element moun ng bracket and inspect elements, chambers, and...
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Page 18: Service/Repair
SERVICE/REPAIR Servicing the Water Reinstall the hea ng elements Use a Phillips screwdriver to as described in “Element remove the four screws Heater Removal and Replacement,” securing the front cover. (pages 19 - 20). Remove the heater’s front cover. See WARNING! Figure 16. - Page 19 Replacement Parts Element Removal and Replacement The following parts may be ordered through your retailer or local If you are not comfortable replacing plumbing wholesaler: a hea ng element yourself, contact a • Heating Elements qualifi ed person. To replace the heat- •...
- Page 20 Return the heater to service NOTICE: Reference the illustra on on by follow the instructions in page 30 for a larger view of the thermis- “Returning the Water Heater tor loca ons. Back to Service’” (page 18). Turn off power to the water Turn on a nearby hot water heater.
- Page 21 Chamber Thermistor Use a Phillips screwdriver to TOP VIEW remove the screw securing (Temperature Sensor) the outlet thermistor retainer Replacement to the chamber. If you are not comfortable replacing Gently remove the outlet a thermistor yourself, have this work thermistor with a pair of needle nose pliers, grabbing done by a qualifi...
- Page 22 Properly plug the chamber With the control board and thermistor wire connector(s) triac board(s) moun ng into the control board. Make screws removed, gently pull sure the chamber thermistor wire the control board with tray away and harness connec ons are connected to down from the assembly.
- Page 23 Removing The Flow Sensor Reinstall the nipple retainer • Non-Contact Circuit Tester plate and position/seat the • Needle Nose Pliers Using a fl at head screwdriver assembly into place. See Figure • 12 inch Adjustable Crescent and/or needle nose pliers, 32, page 22.
- Page 24 With the inlet nipple retainer TOP VIEW pin removed, gently pull the inlet nipple out and away from the upper inlet tube. Installing The New Inlet Nipple Before installing the new inlet nipple, make sure the new O-ring on the upper inlet tube is properly lubricated.
- Page 25 Properly reconnect the sensor With the control board and and triac(s) to the control triac board(s) moun ng board, making sure the sensor, screws removed, gently pull triacs, and wire harness connec ons the control board with tray away and TH1 TH2 TH3 TH4 Flow are connected to the proper control...
- Page 26 Removing The Outlet Nipple body of the outlet nipple. The outlet Control Board nipple can be rotated after the retainer Replacement Locate and remove the screw pin has been installed for proper align- and washer securing the ment. See Figure 45. If you are not comfortable replacing outlet thermistor bracket to Reinstall the outlet thermistor...
- Page 27 Disconnect the chamber Installing The New Control thermistor(s), outlet thermis- Board tor, and fl ow sensor from the With the new control board in control board. If jumper is present on hand, adhere the hardwired the temperature mode, remove and leak detec on sensor in the place on new control board for the designated loca on.
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Page 28: Wiring Diagrams
WIRING DIAGRAMS The wiring diagrams for the various The wiring diagrams are listed as fol- • 4 Chamber, 4 Element, models are listed in this sec on. lows: 208/240/277 VAC, p. 29. Locate the correct wiring diagram that • 2 Chamber, 2 Element, See also “Electrical Requirements,”... - Page 29 POU 4 CHAMBER, 4 ELEMENT WIRING DIAGRAM FRONT Element 2 Element 4 Element 3 Element 1 for wiring purposes. FLOW SENSOR LED DISPLAY Input L2 L1 WIRE WIRE Input L2 L1 L2/N OPERATING FREQUENCY RANGE: 50-60 Hz USE ONLY COPPER CONDUCTOR WHEN CONNECTING TO ELECTRICAL SERVICE.
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Page 30: Appendix
APPENDIX TOP VIEW * Often referred to as a temperature sensor. OUTLET INLET Outlet Thermistor * TH1 TH2 TH3 TH4 TH-Out ENTER THERMISTOR * CONNECTIONS Control Board Thermistor TH-OUT Outlet Thermistor Connections TH-1 Chamber 1 Thermistor TH-2 Chamber 2 Thermistor TH-3 Chamber 3 Thermistor TH-4... - Page 31 POU Mounting Instructions As stated on page 8, the point-of-use (POU) models MUST be mounted in the orienta on as illustrated in Figures 2 and 3. To ensure the leak detec on sensor Visual func ons properly and eff ec vely, it is crucial the leak detec on sensor NOT be removed from the leak detec on sensor shelf.
- Page 32 6.00” (REF) Point-of-use Models Mounting Template • Electric Tankless Water Heater...
- Page 34 A.O. Smith Corporation. All Rights Reserved. Limited Warranty provided by Manufacturer.
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