EcoSmart ECOS 12, ECOS 18, ECOS 27 - Water Heaters Manual

SIZING GUIDE

Please use the chart below to see how many gallons per minute your tankless water heater can produce with your incoming water temperature. The gallons per minute is calculated assuming 105°F outlet temperature.

FLOW REGULATOR

OPTIONAL
To ensure the optimal temperature output and overall performance of your tankless water heater you may require a flow regulator. These flow regulators are installed on the outlet connection of your tankless water heater and limit the maximum volume coming out of your unit to a specified flow rate to prevent the exit temperature from becoming too cool. To learn more about flow regulators or find out how to purchase one for your tankless water heater visit parts.eemax.com, use the flow regulator part number from the table below.

INLET WATER TEMPERATURE

*Selection based on inlet temperature above and outlet temperature of 105°F

Steps for Choosing a Flow Regulator

1. Find your model in the chart below.
2. Choose the column with the inlet water temperature closest to your geographical location.
3. Take the letter matching your zone and model number and match it with the corresponding flow regulator on the right.

BEFORE INSTALLATION

PLEASE READ THESE INSTRUCTIONS THOROUGHLY AND COMPLETELY PRIOR TO INSTALLATION & USE. FAILURE TO FOLLOW INSTRUCTIONS COULD CAUSE PROPERTY DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.

By installing this product, you acknowledge the terms of the manufacturer's warranty. Once the heater is installed, do not return product to the place of purchase. If you have any questions regarding the warranty or product return policies, please contact:

Inspect all components.
The contents of your box should include one of the following units:

REQUIRED TOOL LIST

	Electric drill for pre-drilling holes
	Phillips and Flat head screwdrivers
	Tape measure/ruler
	1/2" dielectric unions - 12 kW
	¾" dielectric unions - 18/27 kW
	1/2" shut off valves - 12 kW
	¾" shut off valves - 18/27 kW
	Adjustable wrench
	Pipe cutter (may be beneficial)
	Pencil
	Level

PRODUCT SPECIFICATIONS

SELECTING AN INSTALL LOCATION

This product is designed to be installed indoors only. You may install your unit in an outdoor location so long as it is mounted in a suitable enclosure that protects it from rain, splashed water, direct sunlight, debris, and insects.
DO NOT install this product in a location where it may be subjected to freezing temperatures. If the water inside your tankless water heater freezes, it can cause severe and permanent damage that is not covered under your warranty.
DO NOT locate the water heater in a location that is difficult to access.
Make sure that the water heater and hot water outlet pipe are out of reach of children, so they are unable to tamper with the temperature controls or injure themselves by touching the hot water outlet pipe. The outlet water pipe can get very hot.
This product does NOT require venting.
Avoid installing your tankless water heater in a location prone to excessive humidity, moisture, or dust, or in an area where it may be splashed with water or other liquids. DO NOT install under water pipes or air conditioning lines that might leak or condense moisture that could then drip onto the heater. DO NOT install above electrical boxes or junctions.

The water heater should not be located in an area where leakage will result in damage to the area adjacent to it or to lower floors of the structure. Where such areas cannot be avoided, it is recommended that a suitable catch pan, adequately drained, be installed under the water heater.

MOUNTING YOUR DEVICE

Your tankless water heater should be secured to the mounting surface with 4 screws (minimum 1-inch long) using the built-in mounting brackets on each side of the heater. Make sure that the mounting surface is solid and secure and ensure that the unit is level prior to securing the screws. For ease of installation and servicing, we recommend that this product be installed in an upright position with the inlet and outlet water connections at the bottom of the unit.

Required Clearances:

12kW - 7 inches top and bottom

18kW - 12 inches top only

27kW - 14 inches top only

Combustible materials should be kept at least 24 inches away from your water heater and the hot water outlet pipe.

PLUMBING INSTALLATION

Please follow all plumbing instructions carefully. We recommend that this product be installed by a licensed and qualified plumber in accordance with all applicable national, state, provincial, and local plumbing codes.

INSTALLATION INSTRUCTIONS

1. Make sure the inlet filter screen is present in the inlet fitting and the inlet and outlet pipes are correctly aligned with the heater connections to minimize stress on the heater.

Do not over-tighten plastic fittings.

2. Connect the plumbing to your water heater. The rule of thumb for installing tapered threaded fittings is finger tight plus 1/2 to 1 turn with a wrench. Do not tighten more than 2 turns past finger tight. Use 1 1/2 turns of Teflon tape going clockwise around the thread, leaving the first 2 threads un-covered to avoid contaminating the water flow into the heater.
3. Fully open the inlet and outlet ball valves. Test with flow and without. Check the system for water leaks at all plumbing connections. If a leak is present at the NPT threads, slowly tighten the female NPT fitting up to 2 turns past finger tight. If still leaking, remove female NPT to check for damage or contamination. Replace Teflon tape before threading NPT back on.
   1. Do not solder any pipes with unit connected to pipes – heat from soldering may damage the flow sensor. Doing so will void the warranty.
   2. This automatic tankless water heater is equipped with both computer-controlled and electro- mechanical auto resetting thermostat switches for high-limited temperature protection. Since this product does not use a storage tank, the use of a temperature pressure relief valve (T&P) is not required for most installations. UL Standard 499 does NOT require that a pressure relief valve be used. However, a T&P valve may be required to meet installation codes in your area. If one is required, install the pressure relief valve in accordance with local codes and ensure that it operates correctly and that air is purged from the valve prior to installing the water heater. When connecting to Flex or High Temperature CPVC pipe, we recommend that a T&P valve be used for added safety. Please note: Installations in the Commonwealth of Massachusetts and State of Kentucky require a pressure relief valve. Please check your local installation codes for any special requirements.
   3. The maximum operating water pressure is 150 PSI. If the water pressure is higher, a pressure reducing valve must be installed on the main incoming water supply line prior to installing the electric tankless water heater.
   4. Flexible water heater hoses are recommended to be used with your water heater as part of the installation. When connecting the inlet water pipe to the unit, make sure to use a wrench to hold the unit's connection, and another wrench to tighten, so that the flow sensor on the unit will not be loosened or damaged. Serious internal damage to the water heater can occur if the inlet or outlet connections are over tightened or if solder connections were made.
   5. We recommend that a manual shut-off valve (ball valve) is installed on the inlet and outlet of the water heater so that there is a convenient shut-off point available in the event that future maintenance or servicing is required. It is extremely important to flush the lines to eliminate all plumbing paste or residue in the lines caused by any welding or soldering before connecting pipes to the water heater.

ELECTRICAL REQUIREMENTS

A ground terminal (or a wire connector marked "G", "GR", "Ground", or "GROUNDING") is provided within the enclosure. To reduce the risk of electric shock, connect this terminal or connector to the grounding terminal of the electric service or supply panel with a continuous copper wire in accordance with your local electrical code.

WIRING DIAGRAM

ELECTRICAL INSTALLATION

Manufacturer recommends that this product be installed by a licensed and qualified electrician in accordance with all applicable national, state, provincial, and local electrical codes. As with all electrical appliances, under no circumstances should you attempt to install, repair or disassemble this water heater without first shutting off all power to the unit directly at the fuse or breaker box. Make sure to shut off all breakers. SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING.

All wiring (wire gauge) and circuit protection (breakers) 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 result in property damage and/or 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 hydronic heating applications be sized to a minimum of 125% of the maximum current rating of the heater (see model specifications below for details).

Before installing this product, ensure that the home has sufficient electrical power available to handle the maximum amperage load of the applicable model.

Model 12 kW requires 1 set of wire and ground (see wiring diagram)
Model 18 kW requires 2 sets of wire and ground (see wiring diagram)
Model 27 kW require 3 sets of wire and ground (see wiring diagram)

Please see electrical specifications by model and wiring diagram above for additional electrical information.
Each set of wires must be connected to its own individual double pole breaker.

INSTALLATION INSTRUCTIONS

1. Take each wire pair and connect them to one breaker (see wiring diagram). Make sure that each breaker is connected with one black wire and one red wire
2. Using a suitable wire gauge that meets all applicable electrical codes for the size of the breakers used, run the correct sets of wire from the home's main breaker panel to the tankless water heater.
3. A separate ground conductor for each incoming circuit is required.
4. DOUBLE CHECK the electrical connections to make sure they are correct and that all wire connections are tight and secure. Also confirm that the correct breaker size and wire gauge has been used and confirm that the unit has been connected to a ground in accordance with applicable codes.
5. Confirm that all the air has been purged from the water lines prior to turning on power to the unit. Refer to STEP 2 in the plumbing installation section.

Ensure that you have made the correct connections. You must follow the wire connection as shown to ensure proper operation of the unit. If you mix up one set of wires with another, the unit will not operate correctly even though it turns on and otherwise appears to function properly.

The water heater is now installed and ready to use! Follow the General Operating Instructions to complete the setup. We highly recommend that this is done with the homeowner present.

GENERAL OPERATING INSTRUCTIONS

Operating your new tankless water heater is similar to using any traditional water heating system. However, it is very important that you carefully read all of the setup procedures and operating instructions and tips to ensure the maximum performance and energy savings from your new water heater. We recommend that all members of the household read these General Operating Instructions.

How your new water heater works: Your tankless water heater does not store hot water like a traditional tank-type water heater. It contains high powered heating elements that are capable of heating water on-demand. As soon as you turn on a hot water faucet, a sophisticated flow sensor recognizes that you have turned on the water. This sensor measures flow rate while another sensor measures the incoming water temperature. This information is transmitted continually to the computer logic controls which decide how much power to send to the heating elements to heat the water to your desired temperature. Once the water faucet is turned off your water heater will turn off as well.

USER INTERFACE

Removing the cover to change the temperature set point exposes electrical shock and burn hazards, which can cause INJURY or DEATH. Adjustment should only be done by a licensed plumber or electrician.

Hotter water increases the potential for Hot Water SCALDS.

BEFORE SWITCHING THE ELECTRICAL BREAKER "ON", VERIFY THE INLET AND OUTLET BALL VALVES ARE FULLY OPEN AND WATER IS FLOWING THROUGH THE HOT WATER FAUCET FOR A MINUTE OR TWO UNTIL THE FLOW IS CONTINUOUS AND FREE FROM AIR POCKETS. DO NOT SWITCH THE BREAKER "ON" IF THERE IS A POSSIBILITY THE WATER IN THE HEATER IS FROZEN.

COMMISSION HEATER

Upon power on, the software revision screen is displayed, then the power selection screen (12, 18, 27 kW).
The next screen represents the SAFE title, then "-1.5"G is displayed. This is a counter that represents the volume of water in gallons remaining to pass through the unit before the unit is considered commissioned.
At this point, water needs to be turned on.
After the counter reaches "0.0", the temperature setpoint screen is displayed. At this point, the unit is commissioned and will heat water upon demand.
Temperature adjustable range: 60°F – 140°F

CHANGING SETPOINT TEMPERATURE

To INCREASE temperature, tap the "+" button repeatedly, or hold the "-" down to INCREASE the temperature quickly.
To DECREASE temperature, tap the "-" button repeatedly, or hold the "-" down to DECREASE the temperature quickly.

Hold " " pressed for 3 seconds to access the Settings menu.
To return to home screen press " " and hold for 3 seconds (will automatically return to home screen after 60 seconds of inactivity).

INITIAL STARTUP SCREEN FLOW

MAINTENANCE

To ensure maximum performance of your water heater and to reduce the risk of a water leak, we recommend the following maintenance:
Inspect the connections on the inlet and outlet of the water heater at least on an annual basis for any signs of damage or failure. Any signs of damage, cracks, leakage or weakness should be addressed. Take care not to over tighten the connections. Serious internal damage to your water heater can occur if you over tighten the water heater connections at the unit.

As with all electrical appliances, under no circumstances should you attempt to install, repair or disassemble this water heater without first shutting off all power to the unit directly at the fuse or breaker box. SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING.
When any maintenance is performed on the water heater or the home's plumbing system that may introduce air into the plumbing pipes, it is important to turn the power off to the water heater and purge the air out of the lines before allowing the unit to power up. FAILURE TO DO SO COULD CAUSE PERMANENT DAMAGE TO THE HEATING ELEMENT AND VOID YOUR WARRANTY.
If you have a water supply with a high level of mineralization (hard water), you should increase the frequency of your maintenance.

FLUSHING THE WATER HEATER
Flushing the heat exchanger is a complicated procedure that should only be performed by a qualified service technician.

NOTE:
Improper maintenance WILL VOID water heater warranty.

Figure 1 – Flushing the Water Heater

1. Disconnect electrical power to the water heater.
2. Close the shutoff valves on both hot water outlet and cold water inlet lines (V1 and V2). See Figure 1.
3. Connect one hose (D1, Figure 1) to the valve (V3) and place the free end in a bucket. Connect one of the hoses (D3) to the circulation pump outlet and the cold water inlet line to valve V4. Connect the other hose (D2) to the circulation pump inlet and place the free end in the bucket.
4. Pour tankless water heater cleaning solution into the bucket. Ensure the cleaning solution is approved for potable water systems. Place the drain hose (D1) and hose D2 to the pump inlet in the cleaning solution.
5. Open service valves (V3 and V4) on the hot water outlet and cold water inlet lines.
6. Turn on the circulation pump. Operate the pump and allow the cleaning solution to circulate through the water heater for at least 1 hour at a rate of 4 gallons per minute. This will remove any possible harmful scale deposits.
7. Rinse the cleaning solution from the combination water heater as follows:
   1. Remove the free end of drain hose D1 from the bucket.
   2. Close service valve V4 and open shutoff valve V2.
   3. Do not open shutoff valve V1.
   4. Allow water to flow through the water heater for 5 minutes.
   5. Close shutoff valve V2.
8. Disconnect all hoses.
9. Remove the cold water inlet filter from the water heater and clean out any residues.
10. Reinsert the filter and ensure the filter cap is securely tightened.
11. Open a hot water faucet. Run the water heater continuously for five minutes to ensure all cleaning solution is purged from the system. Check for leaks and ensure the water heater is operating properly.
12. Connect electrical power to the water heater.

TROUBLESHOOTING GUIDE

Please call or email our customer experience and technical support team for any help you may need.

The following table represents some of the most common technical support questions.

ERROR CODES

SPARE PARTS

IMPORTANT SAFETY INFORMATION

READ ALL INSTRUCTIONS BEFORE USING
When installing or using any high voltage electrical appliance, basic safety precautions should always be followed. Under no circumstance should you attempt to clean, install, inspect, repair, disassemble or otherwise service this water heater, without first shutting off all power to the unit directly at the circuit breaker box. SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING.

THIS PRODUCT SHOULD BE INSTALLED BY A QUALIFIED ELECTRICIAN AND A QUALIFIED PLUMBER IN ACCORDANCE WITH ALL NATIONAL, STATE, PROVINCIAL AND LOCAL ELECTRICAL & PLUMBING CODES.

PLEASE READ THESE INSTRUCTIONS THOROUGHLY AND COMPLETELY PRIOR TO INSTALLATION & USE. FAILURE TO DO SO COULD CAUSE PROPERTY DAMAGE, SERIOUS INJURY, OR DEATH.

Product Registration is required to obtain warranty service. Incomplete Warranty Registrations will not be accepted. Product Warranties are void without receipt of Warranty Registration information within 30 days of receipt and installation of Product

HOW TO REGISTER YOUR PRODUCT
Warranty requires product registration. To register, complete the registration form by scanning the QR Code. For additional support contact:
EcoSmart 877-474-6473

SAFETY

WATER TEMPERATURE SAFETY SETTING
Safety and energy conservation are factors to be considered when selecting the water temperature setting of water heater's thermostat. Water temperatures above the 125°F can cause severe burns or death from scalding. Be sure to read and follow the warnings outlined on the label pictured below. This label is also located on the water heater near the thermostat access panel.

Table courtesy of Shriners Burn Institute

The chart shown above may be used as a guide in determining the proper water temperature for your home.

Water temperature over 125°F can cause severe burns instantly or death from scalds.
Children, disabled and elderly are at highest risk of being scalded.
See instruction manual before setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available, see manual.

Notice: To protect against injury, you should install a mixing valve in the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in branch supply lines. Such valves are available from your local plumbing supplier.

Households with small children, disabled, or elderly persons may require a 120°F or lower thermostat setting to prevent contact with "HOT" water. The temperature of the water in the heater is regulated by the electronic control on the front of the water heater. To comply with safety regulations, the thermostat was set at 120°F/49°C before the water heater was shipped from the factory.

LIMITED WARRANTY INFORMATION

Manufacturer's National Service Department | 400 Captain Neville Dr. Waterbury, CT 06705
EcoSmart 877-474-6473

Documents / Resources

References

• http://parts.eemax.com

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