Hot Water on Demand Electric Tankless Water Heaters ThermoPro Series Models: AT-910-18TP, AT-910-24TP, AT-910-27TP, www.atmorusa.
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.
Table of Contents 1. Safety Guidelines-------------------------------------------------------------------------------------- 4 2. About Your Atmor Electric Tankless Water Heater------------------------------------------------- 4 3. Selecting an Installation Location-------------------------------------------------------------------- 5 4. Mounting the Water Heater-------------------------------------------------------------------------6-7 5.
1. Safety Guidelines Read this manual thoroughly before installing and using the instant water heater. Failure to comply with the safety, installation or operating instructions will void the product warranty. The product manufacturer and the product distributor will not be liable for any damages or injury caused by failure to comply with the installation and operating instructions specified in this manual or by improper use of the product.
Temperature Exposure Time Resulting in Scalding 120°F (49°C) 5 minutes of exposure 122°F (50°C) 3 minutes of exposure If you have small children, disabled, or elderly persons in your home, you may require a setting of 120°F (49°C) or lower to ensure their safety. Water temperature is regulated by the knob on the front of the water heater 3. Selecting an Installation Location • This Water Heater is designed for indoor installation only.
4. Mounting Your Water Heater 1. The instant water heater must be secured to solid mounting surface with four screws (minimum 1” (25.4mm) long). 2. Make sure the unit is level before fastening the screws. 3. The unit must be installed in an upright position with the water inlet and outlet at the bottom of the unit. Do not install with connections on top or the sides. 4. Do not install the unit above electrical boxes or junctions. 5.
Recommended clearances: 12” (304.8mm) above and below the heater 6” (152.4mm) in front of and to the sides of the heater CAUTION: Keep any flammable materials at least 24” (609.6mm) away from the water heater and hot water outlet pipe. 5. Plumbing Requirements and Precautions • Follow all plumbing instructions carefully. This product must be installed in accordance with all national, state, provincial, and local plumbing codes.
• It is recommended to install a manual shut-off valve (ball valve) on the inlet and outlet of the water heater to create a convenient shut-off point if future maintenance or servicing is required. • Before connecting the pipes to the water heater, it is crucial to flush the lines to eliminate all the plumbing paste or residue in the lines caused by any welding or soldering.
7. Electrical Requirements and Precautions Manufacturer recommends that this product be installed in accordance with all applicable national, state, provincial, and local electrical codes. Consult a qualified and licensed electrician if you have questions or are unsure about anything relating to codes for this product. The heater must be connected to a dedicated circuit breaker on the main electrical panel.
8. Electrical Installation STEP 1: Take the wire pair and connect to the breaker. Be sure that the breaker is connected to one black wire and one red wire. Be sure the power to the unit is shut off using the dedicated circuit breakers in the main electrical panel. STEP 2: Run the correct set of power cable wires from the circuit breaker in the main electrical panel to the water heater by utilizing a suitable wire gauge which meets all applicable electrical codes for the size of the breaker.
Electrical Specifications by Heater Input Item # kW AT-910-18TP AT-910-24TP AT-910-27TP 18 24 27 Power Rates Item # AT-910-18TP AT-910-24TP AT-910-27TP Max Amps 75 A 100 A 112.5 A 240V 18,000 Watts 24,000 Watts 27,000 Watts Required Breaker Req.
9. Flow Rate The chart below indicates maximum temperature rise for a given flow rate Item # kW AT-910-18TP 18 AT-910-24TP 24 AT-910-27TP 27 INLET GROUND WATER TEMP 30°F 40°F 50°F 4.1 GPM 3.06 GPM 3.52 5.2 GPM 3.95 GPM 3.52 GPM 5.4 GPM 4.15 GPM 3.65 GPM Based on 105°F Output Water Temp GPM = Gallon Per Minute 60°F 2.04 GPM 3.3 GPM 3.4 GPM 70°F 1.75 GPM 2.4 GPM 2.7 GPM 10. Operation Guide Operating your new tankless water heater is like using any traditional water heating system.
Water Quality: The quality of water must be taken into consideration when installing and maintaining the water heater. Water conditions that do not comply with the recommended levels can damage the water heater. Atmor reserves the right to deny any warranty claim for damage resulting from water conditions that deviate from the levels specified in the table below.
When air is introduced into the plumbing system, follow the steps below to ensure the unit can safely resume operation. 1. Shut off all power to the unit at the circuit breaker on the main electrical panel. 2. Perform the maintenance or servicing tasks. 3. Open one or more hot water faucets and allow water to run through the unit for several minutes to purge any air from the heater and water lines This step must be performed before turning on power to the heater.
Starting the system for the first time 1. With the water running through the unit, turn the temperature knob clockwise to activate the heater. 2. Turn the knob to adjust the temperature.The recommended temperature setting is 118°F (48°C). Freezing Temperatures If the ambient temperature falls below 32°F (0°C), protect the heater from potential damage. Power off the unit using the dedicated circuit breaker on the main electrical panel.
13. Troubleshooting Before calling for service, check the troubleshooting list of common issues. If you are unable to resolve a problem, contact your locally authorized distributor. PROBLEM POSSIBLE CAUSE ISSUE Power outage or No hot faulty wiring. water and display do NOT light up No hot water and display DOES light up Water is heated, but not hot enough. 16 SOLUTION Check the power supply. Check the circuit breakers. Make sure the breakers at main electrical panel are ON.
Water is heated, but not hot enough. Voltage less than 240 Volts The computer chips in your tankless water heater are programmed with the expectation that your incoming line voltage is 240 volts. If you have less than 240 volts [i.e. 208V or 220V], it may affect the reading on your water heater’s digital display and cause it to read slightly higher than the actual output temperature. To compensate for this, increase the setting on your water heater if you need or want hotter water.
14. Reset Unit As with all electrical appliances, it is crucial to first shut off all power to the unit directly at the fuse or breaker box before attempting to reset this 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.
LIMITED WARRANTY For service, repair or any questions regarding your water heater, call the appropriate 800 number listed within this section. Please DO NOT return the product to the place of purchase. Also, DO NOT mail the product back to the manufacturer, nor bring it to a service center without proper instructions and permission from one of our representatives. The terms of this warranty are solely subject to the original owner and are at no time transferable.
P.N.
