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Important Safety Guideline

SAVE THIS INSTRUCTION MANUAL FOR FUTURE REFERENCE.

Definitions: Safety Alert Symbols and Words

This instruction manual uses the following safety alert symbols and words to alert you to hazardous

situations and your risk of personal injury or property damage.

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in

death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result

in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in

minor or moderate injury.

(Used without word) Indicates a safety related message.

NOTICE: Indicates a practice not related to personal injury which, if not avoided, may

result in property damage.

WARNING

: READ THIS INSTRUCTION MANUAL THOROUGHLY AND COMPLETELY

BEFORE INSTALLATION AND USE. FAILURE TO DO SO COULD CAUSE DAMAGE TO PROPERTY,

SERIOUS INJURY OR DEATH, AND VOID YOUR WARRANTY.

Contact service directly if you have any questions regarding your unit
Monday- Friday, 9AM-5PM EST
Phone: 1-888-783-6082
Email: [email protected]

WARNING: Cancer and Reproductive Harm –

www.P65Warnings.ca.gov.

AVERTISSEMENT: Cancer et Troubles de l’appareil

reproducteur – www.P65Warnings.ca.gov.

ADVERTENCIA: Cáncer y Daño Reproductivo –

www.P65Warnings.ca.gov.

For California residents / Pour les résidents de la Californie / Para residentes en California

Summary of Contents for AT-910-18TP

Page 1: ...www atmorusa com Electric Tankless Water Heaters ThermoPro Series Models AT 910 18TP AT 910 24TP AT 910 27TP Hot Water on Demand ...

Page 2: ...oderate injury Used without word Indicates a safety related message NOTICE Indicates a practice not related to personal injury which if not avoided may result in property damage WARNING READ THIS INSTRUCTION MANUAL THOROUGHLY AND COMPLETELY BEFORE INSTALLATION AND USE FAILURE TO DO SO COULD CAUSE DAMAGE TO PROPERTY SERIOUS INJURY OR DEATH AND VOID YOUR WARRANTY Contact service directly if you have...

Page 3: ...l Installation 10 9 Flow Rate 12 10 Operation Guide 12 13 11 Care and Maintenance 13 14 12 User Interface Controls 14 15 13 Troubleshooting 16 17 14 Reset Unit 18 Before Installing By installing this product you acknowledge the terms of the manufacturer s warranty and authorized dealer s return policy Once the heater is installed do not return the product to the place of purchase If you have any q...

Page 4: ...d indoor use only Do not immerse in water Each breaker used to power this unit must be grounded by means of the electrical panel The heater must be connected directly to dedicated circuit breakers on the main electrical panel Do not install the heater where it may be subjected to direct sunlight rain splashing water moisture humidity or freezing temperatures This unit is intended for heating water...

Page 5: ...e unit below water pipes or air conditioning lines where it is susceptible to leaking or dripping water or other liquids Do not install the unit above electrical boxes or junctions If possible avoid installation in a location that could be damaged due to leakage from the water heater Install a drip pan with drainage or an active leak detector and automatic shutoff valve to prevent damage in case o...

Page 6: ...pipe The water heater and the hot water outlet pipe must be secured and out of children s reach to prevent tampering with controls or contact with an extremely hot pipe 6 If installing the heater on an upper floor or attic make sure installation complies with the local codes Install a drip pan with drainage or a leak detector and automatic shutoff valve to prevent damage in case of any leakage 7 U...

Page 7: ...be installed in accordance with local codes It is important to ensure that the unit is operating correctly and that air is purged from the valve prior to installing the water heater A T P valve is recommended for added safety when connecting to plumbing rated metal flex or high temperature CPVC piping NOTE A pressure relief valve is required for installations in the Commonwealth of Massachusetts a...

Page 8: ... the cold water inlet where this unit will act as booster STEP 3 After tightening both fittings on the water heater turn on several hot water faucets to allow water to flow through the water heater for at least 2 to 3 minutes This process purges all the air from the water lines and must be performed before turning on the power at the unit FAILURE TO PERFORM THIS STEP COULD CAUSE PERMANENT DAMAGE T...

Page 9: ...gauge as well as circuit protection breaker must comply with the U S National Electrical Code NEC in the USA or the Canadian Electrical Code CEC in Canada Failure to do so could lead to property damage personal injury and void your warranty Note The Canadian Electrical Code generally requires that all supply wires and corresponding circuit protection used for domestic hot water heating and hydroni...

Page 10: ...P 4 DOUBLE CHECK The electrical connections and ensure the wire connections are correct tight and secure It s important to confirm that the right breaker size and wire gauge has been used and that the unit has been connected to a ground in accordance with applicable codes Be sure to reattach the front cover of the unit with four screws STEP 5 Ensure that all the air has been purged from the water ...

Page 11: ...208V AT 910 18TP 18 000 Watts 150 125 Watts 13 520 Watts AT 910 24TP 24 000 Watts 20 166 Watts 18 026 Watts AT 910 27TP 27 000 Watts 22 687 Watts 20 280 Watts Your tankless water heater is now installed and ready to use Follow the General Operating Instructions to complete the setup Wiring Diagram for AT 910 18TP AT 910 24TP AT 910 27TP Terminal Block in Unit Circuit Breakers Unit Requires 10 AWG ...

Page 12: ...sitting and losing heat in a storage tank it provides significant energy savings than a conventional water heater With your new system as soon as you turn on the hot water faucet the demand for hot water is detected by a flow sensor and the high power heating elements are activated Sensors continually monitor the water flow rate and measure the incoming and outgoing water temperature Data is trans...

Page 13: ... leak the following maintenance is recommended The water heater has minimal maintenance requirements Periodically inspect and test the heater for signs of damage or failure Any damage cracks leakage or weakness should be addressed and fixed immediately Do not over tighten any of the connections Over tightening the connection points could cause severe internal damage to the unit Remember that water...

Page 14: ...to the right clockwise to activate the heater The display will light up Turn the knob all the way to the left counterclockwise to turn off the heater Setting the Output Water Temperature To set the temperature turn on a hot water faucet and allow water to run through the heater Turn the knob clockwise to activate the heater and display the outlet temperature To raise the temperature setting turn t...

Page 15: ...flow continuously through the device at a very low rate without heating Restore power to the unit when temperature condition is normal If the water inside the heater freezes it can cause damage that is not covered by warranty If you suspect water has frozen within the unit do not turn it on until you are sure the frozen water has melted and there are no leaks in the unit It is recommended to conta...

Page 16: ...ter Reduce the water flow rate at the faucet or slightly close the shutoff valve on the unit s incoming water supply line to reduce the water flow rate Voltage less than 240 Volts The heating elements on your water heater are designed for 240 volts When used with a lower voltage they produce less heating power You may need to upgrade to a larger input heater Crossed Wires If it s a new installatio...

Page 17: ...r outlet Temperature setting is too high Switch to a lower temperature setting Water Temperature at faucet is too hot Check for too little flow or if the set point temperature is too high This could possibly indicate a possible internal part failure Call us for technical assistance Heater shuts off during use Power outage or faulty wiring Check the power supply Check the circuit breakers If the pr...

Page 18: ... water heater WARNING SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING Locate the three reset button locations as shown below and press all buttons If you hear a click the unit has reset If you find that the unit needs to be reset quite often please call our customer service for further assistance Proceed to turn on your breakers and power on the unit ...

Page 19: ...water heater or part is not available the manufacturer s liability is limited to the cost of the water heater or 1 000 00 whichever is less The manufacturer is not an insurer and the original owner should purchase insurance to cover damage to property or belongings The original owner agrees to waive their right to jury trial or to participate in a class action Also the original owner agrees to wai...

Page 20: ...Notes P N 196183J ...

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