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 di culty following the direc ons, or °F °C ENTE R United States: 1-877-817-6750 Canada: 1-800-265-8520 We can help you with installation, operations, troubleshooting, or maintenance.
SAFETY IMPORTANT SAFETY INFORMATION Read and follow all safety messages and instruc ons in this manual. This is the safety alert symbol. It is used to alert you to poten al physical injury hazards. Obey all safety messages that follow this symbol to avoid possible property damage, serious injury or death. Do not 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.
o reduce the risk of property damage, serious injury or death, read and follow the precau ons below, all labels on the water heater, and the safety messages and instruc ons throughout this manual. General Requirements unit in accordance with local codes, or in the absence of local codes, with the current edition of the National Electrical Code: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canadian Electrical Code, Part 1 in Canada. heating, and air conditioning codes during installation.
SAFETY precau ons are par cularly important. According to a na onal standard, American Society of Sanitary Engineering (ASSE 1070), and most local plumbing set point should not be used as the sole means to regulate water temperature and avoid scalds. Properly adjusted Thermosta c Mixing Valves installed at each point of use set point to a higher se ng without increasing the risk of scalds.
GENERAL INFORMATION Introduction the rating plate which is attached to the side panel of the water heater. instructions completely before installing this product. or questions regarding this equipment, consult the manufacturer or its local representative. This appliance is an on-demand, electric tankless water heater. It is designed to efficiently supply endless hot water for your needs. manually two or three times to purge the trapped air from the top of the valve.
Component Identification: Two-Chamber Models (R2V, C2V) GENERAL INFO OUTLET INLET HEATING ELEMENTS NOTICE: The user interface is described in Figure 7, page 16. Intermediate Thermistor * (connects to TH-1) TH-1 TH-2 TH-IN Thermistor* Connections TH-IN Inlet thermistor TH-1 Intermediate thermistor TH-2 Outlet thermistor Access Plate (for draining) L1 L2 * Often referred to as a temperature sensor.
General Specifications Wiring & Circuit Breaker Requirements Water Connections Weight lbs. (kg) Water Heater Dimensions* * Point-of-Use: RPV, CPV Two Chamber: R2V, C2V Four Chamber: R4L, C4L, R4M, C4M 8 lbs. (3.6 kg) 13 lbs. (5.9 kg) 20 lbs. (9 kg) (H 42.2cm x W 16.5cm x D 18.3 cm) (H 45.1 cm x W 29.2 cm x D 15.6 cm) (H 46 cm x W 43.2 cm x D 15.6 cm) Height dimension includes the distance from the bottom of the heater to the highest point of the inlet/outlet.
GENERAL INFO Electrical Requirements Follow these steps to determine the electrical requirements for your water heater: 2.) Locate that model number in one of the tables listed below. For example, if your model is RPVA-24-K, find *P**-24-K in the appropriate table. Models within each table are sorted by Voltage first, then by Wattage per Element (KW). Follow the requirements listed for your model. Point-of-use models are listed below. Two-chamber models: page 9. Four-chamber models: page 10.
Point-of-Use Models NOTICE: Models sorted by Voltage, then by Wattage per Element. Model Recommended Breaker Size Voltage (Amps) * Number Wattage Current per of per Element Breaker Elements (KW) (Amps) Recommended Wire Size* (AWG) Element Type *P**-40-Y 15 277 1 4 14.44 14 Single *P**-60-Y 25 277 1 6 21.66 10 Single *P**-73-Y 30 277 1 7.3 26.35 10 Single *P**-90-Y 40 277 1 9 32.49 8 Single All wiring/conductors must be rated for 90°C or greater.
GENERAL INFO Four-Chamber Models (Single Phase) For potable water heating only. Not for space heating. NOTICE: Models sorted by Voltage, then by Wattage per Element. Model Recommended Breaker Size Voltage Number of Elements Wattage per Element (KW) (Amps) Current per Breaker (Amps) Recommended Wire Size* Element Type (AWG) *4**-280-X 70 amps each (2 cirucits) 208 4 7 67.31 6 Single *4**-180-E 40 amps each (2 circuits) 240 4 4.5 37.
INSTALLATION Getting Started electrical wires that will enter the heater from the side. Clearances Bottom Clearance: At a minimum, maintain a bottom clearance of 8 inches (20.3 cm) for single chamber models or 15 inches (38.1 cm) for 2- or 4-chamber models. Do not store any items underneath the water heater. See Figure 1 or Figure 2. Top Clearance: A minimum of 12 inches (30.5 cm) is required for removal and maintenance of heating elements and to provide access for plumbing connections.
clearances are observed. Do not store any items underneath the water heater, and do not store flammable liquids or other flammable materials near the water heater. This is important for safety and future service. See underneath condensate lines. INSTALLATION protection against water damage, is recommended to be installed under the water heater in case of leaks. In addition, you may install an active water leak detector with a shutoff valve which can turn off the water supply in the event of a leak.
the heater. The second wrench must be used fittings securely because they are designed to turn freely. are recommended for your installation. 1. Make sure that the water supply is turned off. 2. Connect the hot water line to the hot outlet of the water heater. (Figure 4.) 3. Connect the cold water line to the cold inlet of the water heater. (Figure 4.) 4. Open the valve on the main water line to supply water to the heater. 5.
(ampacity) and circuit breaker ra ng/type are correct for this water heater. If you marked the board and connector during earlier steps, align the marks when plugging the connector in. NOTICE: The electrical requirements for your model are which starts on page 8. INSTALLATION 4. NOTICE: The plug must be oriented correctly. If you plug it in backwards, it will not cause damage, but the display will not work.
OPERATION Water Temperature Adjustment WARNING Scalding Risk This water heater can make water hot enough to cause severe burns instantly, resulting in severe injury or death. Before a emp ng to adjust the temperature instruc ons are not clear, contact a qualied service technician. To adjust your temperature se ng, refer to one of the following procedures. turn the temperature adjustment knob as described below. This knob can be found at the top of the circuit board next to the plumbing connecons.
Figure 7. To toggle between Fahrenheit and 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.
TROUBLESHOOTING Error Codes for Point-of-Use Models If you have a two- or four-chamber model, see page 19. 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. Some models are connected to more than one branch circuit, and more than one disconnect switch may be required to de-energize the equipment.
Flash Code Sequence Description Action / Solution 1-8 Leak detected. Shut o all power to the water heater. Check for water leaks. Correct any leaks found. Dry the leak sensor (Figure 8), then dry the circuit board completely before restoring power. 2-1 Tank is not full of water. Ensure that the heater is lled with water and that there is no air trapped inside.
Error Codes for Two and Four Chamber Models If you have a point-of-use model, see page 17. 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. Some models are connected to more than one branch circuit, and more than one disconnect switch may be required to de-energize the equipment.
Display Description E14 4-Chamber models only: Outlet thermistor open (TH-4). E20 Inlet thermistor shorted. E21 Shorted thermistor. E22 Action / Solution 1. 2. 3. 4. 5. Turn o power to the water heater. Check the connec ons of the thermistor in ques on. Disconnect the thermistor, then reconnect it. Turn on power to the water heater. Does the error code reoccur? If yes, turn o power and replace the thermistor that is listed in the le 2- and 4-Chamber models: TH-1 shorted.
General Troubleshooting The following chart provides an overview of basic troubleshooting. Symptom water is being used. Hot water supply is warm, but it does not get hot. Hot water supply is cold. Corrective Action Cold water used causes reverse flow through water heater. Install check valve on outlet. Unit has been in standby for an extended period with no hot water use. NORMAL OPERATION. Unit will activate as needed to maintain a reference temperature to ensure quick start-up on next use.
SERVICE WARNING! Electric Shock Risk Servicing should be performed on this water heater only after it has been disconnected from the power supply circuit(s). Failure to do so can result in severe injury or death from electrical shock: circuit breaker or removing the fuses before installing or servicing. more than one branch circuit, and more than one disconnect switch may be required to de-energize the equipment.
5 cover, then place a bucket under the water heater to catch any water that spills. Figure 13. Point-of-use models: Grommet Orienta on Outlet Inlet NOTICE: If you have a two- or four-chamber model, you must cable from the control board. When you plug it back in later, it must be oriented correctly. (See Figure 5, page 14.) We recommend marking the connector and board with a marker. You will then be able to align the marks. If you have a point-of-use water heater, go to step 6.
C.) Secure the element by installing and tightening the retaining nut (Figure 14, page 23). Do not overtighten. D.) Secure the red and black wires onto the top of the heating element. Use the two screws that you removed earlier. E.) Reconnect the green ground wire B.) Reinstall the top plate and secure it with the two screws that you removed earlier. (See Figure 12, page 23.) C.) Go to step 8 on page 25. one access plate Figure 17.
7.3 Install the new element: A.) Insert the new element into its water heater opening. Make sure that the O-ring is positioned properly. (See Figure 20.) 11 Check wires with a non-contact circuit tester to make sure power is o . When you are nished, be sure all covers are secured to reduce the risk of re and electric shock. A.) Two- or four-chamber water heaters only: Take the connector and plug it into the control board.
Figure 22. Thermistor loca ons (Point-of-use models) OUTLET Figure 24.
5 6 Remove the thermistor by turning it counter-clockwise with a 1/2-inch open end wrench. Install the new thermistor in the opening by turning it clockwise with a 1/2-inch open end wrench. Draining the Water Heater WARNING! Working on an energized circuit can result in severe injury or death from electrical shock. Turn power off. Some models are connected to more than one branch circuit. Disconnect all branch circuits before servicing unit.
G.) Reinstall the inlet and outlet water lines to the water heater. H.) Go to step 7. 6 Two- or four-chamber water heaters only: Drain the two- or four-chamber water heater: A.) Remove all six screws that secure the access plate beneath the element (at the bottom of the water heater). See Figure 26. B.) Remove the access plate and allow the water to drain into the bucket. C.) Clean the access plate and both seals. D.) Make sure that both seals are seated properly, then reinstall the access plate.
WIRING DIAGRAMS The wiring diagrams for various models are listed in this sec on. Locate the one that corresponds with your model. VAC (see below). VAC, p. 33. 240/208 VAC, p. 30. NOTICE: The correct wiring diagram for your model can be found on the inside page 8. p. 30. VAC (other than 16kW, 18kW, or 14kW/208V), p. 31. The wiring diagrams are listed as follows: VAC (16 kW, 18kW and 14kW/208V only), p. 32. (see below).
1 Chamber, 1 Element, 277 VAC 1 Chamber, 1 Dual Element, 240/208 VAC GRN GRN Level Detect Moisture Sense RED Relay 1 Control Board TH-IN RED RED BLK Element RED BLK TH-AUX BLK 3-Pin Conn. RED BLK Relay 1 RED TH-IN Level Detect Moisture Sense Relay 2 BLK RED RED TH-AUX Relay 1 3-Pin Conn.
Moisture Sense BLK Relay 2 Relay 3 BLK RED BLK RED Relay 1 Element 2 RED Element 1 RED Element 1 BLK BLK BLK Element 2 2 Chamber, 2 Element, 240/208 VAC RED RED Relay 4 BLK Power Supply RED BLK RED TH-IN RED TH-2 RED RED BLK TH-1 BLK Level Detect BLK RED BLK RED BLK GRN Ground Display L1 L2 USE COPPER CONDUCTORS ONLY WHEN CONNECTING TO ELECTRICAL SERVICE. DIAGRAMS NOTICE: 16 kW and 18 kW two-chamber models DO NOT use this congura on.
Moisture Sense BLK Relay 2 Relay 3 BLK RED BLK Relay 1 Element 2 RED Element 1 RED Element 1 BLK BLK BLK Element 2 2 Chamber, 2 Element, 240/208 VAC Used ONLY with the following two-chamber models: RED RED Relay 4 Power Supply BLK DIAGRAMS BLK RED BLK GRN Ground RED RED BLK RED TH-IN RED BLK RED TH-2 BLK RED BLK TH-1 BLK Level Detect RED L1 BLK L2 RED BLK Display L1 L2 CIRCUIT BREAKER A CIRCUIT BREAKER B USE COPPER CONDUCTORS ONLY WHEN CONNECTING TO ELECTRICAL S
Moisture Sense BLK Relay 2 Relay 4 BLK RED BLK RED BLK RED Relay 1 Element 4 RED Element 3 RED Element 2 RED Element 1 RED Element 1 BLK Element 2 BLK BLK Element 3 BLK BLK Element 4 4 Chamber, 4 Element, 240/208 VAC RED RED Relay 3 Level Detect BLK TH-1 Relay 6 RED Relay 5 BLK BLK Relay 8 TH-3 Power Supply RED BLK RED BLK TH-IN RED RED TH-4 BLK RED RED BLK GRN Ground RED Relay 7 BLK RED TH-2 J7 BLK RED BLK Display L1 L2 L1 L2 CIRCUIT BREAKER A CIRCUIT BR
APPENDIX: HORIZONTAL MOUNTING OF POU MODELS As stated on page 12, point-ofuse (POU) models may be mounted horizontally. Note the following: Figure 27. Horizontally-mounted POU water heater: horizontally, it must be mounted with brackets (provided). The nipples must face toward the right as shown in Figure 27. models cannot be mounted horizontally. They must be mounted vertically (nipples facing upward). Figure 28. 12. NOTICE: (Figure 2, page 11) before you start.
Set the water heater on the brackets, base plate down, and secure it with four sets of bolts and nuts. See Figure 30 and Figure 31. 3 NOTICE: Ensure that the nipples face toward the right as shown in Figure 27, page 34. 4 Return to page 12 to complete the water heater installation. Figure 30. Internal water heater components are represented by hidden lines. Surface Water Heater Components Base Plate Bolts (X4) (Bolt heads face upward) Figure 31.
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