Hot Water on Demand Installation and Operation Guide Thermo-Pro Thermostatic Series 18kW, 21kW, 24kW 118 F º www.atmorusa.
Table of Contents Description Safety Guidelines Page Safety Guidelines...........................................................................................................................2 Technical Information......................................................................................................................3 Plumbing..................................................................................................................................... 4-5 Mounting....................
Technical Information Plumbing Electrical Specifications Thermo-Pro 18 kw 3 18,000 18 kW 240 V 3 x 30 A 3 x double-pole 75 A 3 x 8 AWG Heating elements Watts Kilowatts Voltage Circuit Breaker Amperage Breaker/Relay Total Connection Load Cable Size (minimum) Thermo-Pro 21 kw 3 21,000 21 kW 240 V 3 x 40 A 3 x double-pole 87.
Mounting 01 The mounting surface must be solid and secure. 03 Make sure the unit is level prior to securing the mounting screws. 06 07 5 02 01 05 03 Use mounting screws that are at least 1 inch in length. 04 The unit must be installed in an upright position with the water inlet and outlet at the bottom. Assembly Instructions Do not install the unit above electrical boxes or junctions. The water heater must be installed in a manner that prevents contact with combustible materials.
1 Washer Assembly Instructions 1 08 104 F º Reconnect the cable to the PCB within the unit. (Figure 3) 2 Pressure relief device 2 104 F º 118 F º 3 118 F º 4 Water Filter 18kw-24kw Note: Neutral (N) does not need to be connected. 7 L1 L2 L1 L2 L1 L2 6 5 09 Replace the front cover onto the unit and reattach it with 2 screws. (Figure 2) 11 Restore power to the unit by means of the dedicated circuit breakers on the main electrical panel.
Electrical Diagram Starting the system for the first time 2 Phase, 18kW, 21kW, 24kW H3 H2 H1 TRIAC 3 TRIAC 2 TRIAC 1 T1 TERMINAL BLOCK L1 L2 L1 L2 L1 L2 T2 T3 01 Turn the temperature knob clockwise to activate the heater to display outlet temperature. SNSR1 SNSR2 SNSR3 With water running through the unit, turn the knob to adjust the temperature. The recommended temperature setting is 118°F (48°C). A GROUND BAR FLOW SENSOR 02 03 The water heater is now ready for operation.
Operation Guide Operating Instructions for the Home Owner This electric water heater is designed to supply hot water for a house or apartment. Unlike a conventional tank storage water heater, this unit is a tankless water heater that does not store hot water. However, once you begin using the system, you will find it operates much like a conventional tank system. Tankless systems deliver hot water instantaneously on demand.
Care and Maintenance 01 03 05 Press the power switch to the OFF position. Shut off all power to the unit at the circuit breaker on the main electrical panel. 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. Failure to perform this step may cause permanent damage to the heating elements.
LIMITED WARRANTY Atmor Industries Ltd. warrants to the original owner of this instant water heater that it will be free from defects in workmanship and material for a period of two years from the date of purchase, and free from leakage for a period of seven years from the date of purchase. Should any part(s) prove to be defective during this period, Atmor will be responsible for replacement of the defective part(s) only. Atmor is not responsible for labor charges or any incidental or consequential expenses.
