EZ Tankless Supreme On Demand 8.2 GPM 165,000 BTU LPG Propane Gas Tankless Water Heater User's Manual

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EZ Tankless Supreme On Demand 8.2 GPM 165,000 BTU LPG Propane Gas Tankless Water Heater User's Manual | Manualzz



EZ Supreme

Read the installation instructions before installing the appliance.

Read the user’s instructions before powering on the appliance.


ISO9001 Certified


For your safety and the safety of others, this heater cannot be connected to an existing natural draft exhaust. Only the sealed-joint concentric intake/exhaust components made specifically for this heater can be used. There are no compromises, do not attempt to modify or substitute the exhaust/intake components of this heater! Multiple advanced redundant electrical safety devices are integrated into the electronics of this heater, they cannot be disconnected or bypassed and they are designed to detect any and all modifications and incorrect connections. These devices will prevent the heater from turning on. This heater will not run without the exhaust/intake pipe being connected.


Do not proceed with the installation of this heater until you are familiar with the concept of concentric intake/exhaust direct vent technology. This exhaust system is actually two pipes in one. Most manufacturers have switched to this technology for many reasons. Maximum efficiency and safety are two primary reasons. As this technology is relatively new, it is not uncommon for users to not understand the concepts. If you are replacing an existing tank type heater, there is no possible way to use the old exhaust pipes. It will not work, do not try! With “Direct Vent” heaters made by any manufacturer, the intake air is drawn into the heater from outdoors via one chamber or pipe, the exhaust exits via a second chamber or pipe. With the EZ SUPREME model, the intake combustion air comes from outside via the outer concentric chamber of our dual chamber pipe and the exhaust exits through the inner part of the pipe.

If you are uncertain of what this technology means to you and how it saves you energy, please read this manual thoroughly and review the information and videos on our website at these links:

Technical information: http://www.eztankless.com/resources/articles/the-ez-deluxe-tanklesswater-heater-explained/

Videos: http://www.eztankless.com/videosandphotos.html

Thank you for your purchase and putting your trust in our company.

We are here to serve you, find us on the web at: http://www.eztankless.com/

Important things to remember during installation and initial operation

1. Direct Vent pipes – Make sure both intake-exhaust pieces (the 94 degree bend and the 31inch long straight piece) are connected AND that each connection is sealed with heat sealant tape.

2. Heated Room – Be sure that the unit is being installed inside a heated room.

3. Plumbers Putty/Tape – Be careful not to over apply plumber’s putty/tape to the inlet and outlet water fitting. The putty/tape if overdone can become caught in the inlet screen and/or the inlet sensors and impellor that may adversely affect the performance of the unit. Examples are shown below. The second picture shows sediments that can be in the water. This is why we also

HIGHLY recommend having an inline water filter before the tankless water heater.

Plumbers Tape Sediments in Water

4. Direct Vent on downward angle – To prevent any condensation from dripping inside the unit, be sure to have the flue on a slight downward angle outside the home. (The elbow that turns the exhaust-intake pipe into a horizontal position is pre-bent to 94 degrees to allow for a downward slope of an additional 4 degrees).

5. Double Water Pressure – A common mistake by plumbers and amateur installers alike is to erroneously connect cold pressurized water into the home’s hot water pipes. Typically this happens at the point where the old tank-type heater is removed. On a tank-type heater there is a cold line into the heater which comes from the cold inlet water system. Then there is an outlet line from the heater into the hot water plumbing. If you are removing a tank-type heater and mounting the tankless heater at another location, please remember NOT to join-together the two water lines that were on the old tank-type heater. They must be “CAPPED-OFF”. If they are connected; all you are doing is placing pressurized cold water into your hot water plumbing system at that point. Not only will it be almost impossible for your new tankless heater to overcome the cold water blending into your hot system, there may actually be pressure coming back at the hot outlet side of your new tankless heater and it may not even run as the water will essentially be “standing still”.

(a) Think of this as a stream or river, the system can only flow one direction. If you go downstream and divert the river and guide it back to the beginning, all you have is a lake, the flow is defeated.

(b) If you divert the river into two rivers “hot and cold stream”, if you bring them back together at another point, then they are one river again. What water you may have heated is now cooled by the converging cold water returning into the flow of the river.)


Inside you will find many helpful hints on how to use and maintain your water heater properly. A little preventive care on your part can save you time and money over the life of your water heater. You’ll find many answers to common problems in the Troubleshooting

Guide. If you review the chart of Troubleshooting Tips first, you may not need to call for service.


All safety messages will use either the word “DANGER”, “WARNING”, “CAUTION” or


These words mean:

DANGER - An imminently hazardous situation that will result in death or serious injury.

WARNING - A potentially hazardous situation that could result in death or serious injury and/or damage to property.

CAUTION - A potentially hazardous situation that may result in minor or moderate injury.

NOTICE - Attention is called to observe a specified procedure or maintain a specific



Write date of purchase here:

Staple sales slip or cancelled check here. Proof of the original purchase date is needed to obtain service under the warranty.



Failure to properly install and properly vent the water heater to the outdoors as outlined in the Venting Section of the Installation Instructions in this manual can result in unsafe operation of the water heater. To avoid the risk of fire, explosion or asphyxiation from carbon monoxide, never operate this water heater unless it is properly vented and has an adequate air supply for proper operation.

Be sure to inspect the vent terminal, the air intake, and the coaxial vent system on the water heater for proper installation at initial start-up; and at least annually thereafter.

Refer to the Care and Cleaning section of this manual for more information regarding vent system inspection.


Gasoline, as well as other flammable materials and liquids (adhesives, solvents, paint thinners etc.), and the vapors they produce are extremely dangerous. DO NOT handle, use or store gasoline or other flammable or combustible materials anywhere near or in the vicinity of a water heater or any other appliance. Be sure to read and follow the labels on the water heater, as well as the warnings printed in this manual. Failure to do so can result in property damage, bodily injury or death.


Contact your local gas dealer or utility company specialist for a qualified engineer to evaluate your plans and always use a qualified technician to install the gas water heater.


The flue of this gas water heater should be installed through an external wall; the heater can’t be installed outdoors


The Direct Vent Exhaust of this heater can’t be connected to a common natural draft flue!

Please don’t install the heater in places where special chemicals are used, like the laundry or factory etc., otherwise it ma y cause internal metal corrosion and shorten the life of the heater, or even cause it to function abnormally.

Try not to install the exhaust of the heater through the wall of a room with nearby open windows as the waste gasses may flow back into the building due to drafts and wind

conditions. See above drawings, diagrams and rules for general rules of exhaust spacing in relation to openings, windows, soffits and doorways. Always check local and State code.

This is why only trained professionals should install any gas-fired device.

The heater is 115V 60 cycles and must be plugged into a ground fault protected outlet as per code. The outlet should not be directly below the heater in case of water leakage.

Never install the heater above or directly against any other electrical or gas fired device.


Drill holes on the wall affix as necessary. Use expansion bolts in the upper hole for a secure mounting. Do not mount the heater to flammable materials. See local and/or State code. Consult a professional at all times. In many locations, installation must pass the scrutiny of the local code inspector, if unsure of local rules and regulations; please be sure to verify the proper way in which to install this heater. This way you can avoid unnecessary or additional expenses.

The typical proper mounting height is (4 - 6ft above the ground)

No visible electrical wire or any electric appliance is permitted above or below the heater, the horizontal distance between the heater and any other electrical appliance should be more than 1.5 feet




1) Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the USA or the CAN/CSA B149.1

Natural Gas and Propane Installation Code in Canada.

2) Properly ground the unit in accordance with all local codes or in the absence of local codes, with the National Electrical Codes,

ANSI/NFPA 70 in the USA or CSA standard C22.1 Canada Electrical Code Part 1 in


3) Carefully plan where you intend to install your Water Heater. Ensure that your heater will have enough combustible air and proper ventilation and locate your heater where water leakage will not do damage to surrounding areas. If there is a possibility of water damage, install a suitable drain pan under the unit which will not restrict combustible airflow.

Installer must install a Pressure relief valve. Pipe the pressure relief discharge to a drain or outside environment.

4) Check the rating plate for the correct gas type, gas pressure, water pressure and electrical rating. If this unit does not match your requirements, do not install.

5) If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained technician or the Gas Company or the manufacturer.

NOTE: The installer is responsible for the correct installation of your Water Heater.

Installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter) otherwise the warranty by EZTANKLESS will be void.

6) Read the safety issues completely before installing the Water Heater.

7) This water heater is suitable for residential water (potable) heating ONLY.

DO NOT use this water heater for space heating, combination space heating/ domestic water heating, or commercial water heating applications.

8) The EZ SUPREME Water Heater is not suitable for use in pool or spa applications.

9) This unit is designed to be installed indoors using the proper vent piping to exhaust byproducts of combustion to the outside environment. Contact your dealer or EZ

TANKLESS for proper vent kits. DO NOT run this unit without OUR ORIGINAL

EQUIPMENT vent piping connected. Exhaust gasses must be expelled outside the home.

10) Maintain proper space around the unit for proper servicing and operation. Minimum clearances from combustible materials are listed below.

Top of Heater 6 inches

Back of Heater 1 inch

Front of Heater 6 inches

Sides of Heater 2 inches

Floor 12 inches

Vent/Air Intake 0 inches

Model identification information


Official EZ tankless water heater brand


Natural Gas (model for this gas type)

LP Liquid petroleum gas “propane” (model for this gas type)


When this heater is in use, there is obviously a combustion process which generates heat to make hot water. The combustion of almost all combustible materials and flammable gases of any kind typically consumes a large amount of oxygen and in turn this combustion process produces many different by-products in the smoke (exhaust) which include

Carbon Monoxide. Regardless of how clean the combustion process is, there are always exhaust gasses that are emitted at some level. Breathing too much Carbon Monoxide will cause imminent danger or even death. Therefore, the users of this heater are requested to install and use this heater strictly according to the warnings set forth in this manual to avoid possible Carbon Monoxide intoxication. The manufacturer or its authorized distributors will not be held responsible for any danger resulting from the installation and operations not in accordance with this manual. Always install a Carbon Monoxide detector in the area of any gas fired appliances. In fact, this may be the law in your State or town and failure to do so is in violation of many state and local codes.


This product can only be used after an Official EZ Tankless Direct Vent Exhaust System is installed.


This heater is not designed to be mounted in areas outdoors or unheated structures if temperatures can drop below freezing.

When the temperature of the room in which this heater is mounted drops below freezing

the residual water must be drained from this unit.



If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is equipped with a direct ignition device which automatically lights the burner. Do not try to light the burner by hand.

B. BEFORE OPERATING: Smell all around the appliance area for gas. Be sure to smell next to the floor because some gasses are heavier than air and will settle on the floor.



• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

Use only your hand to operate control keypad. Never use tools. If the keypad doesn’t work, do not try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.


This tankless water heater uses the Direct Vent Exhaust System. This is absolutely the safest and most economical ventilation method in use among tankless water heaters. This method uses a dual-chamber intake/exhaust pipe and a forced air system. This model is suitable for showering, using the sink, a clothes washing machine or even your dishwasher. This tankless water heater uses all of the safest and most efficient technologies available today, making it a leader in its class of tankless water heaters.


Since this product adopts the method of forced exhaust and fresh air supply for combustion, this air needed for combustion is completely from outdoors, and the waste gases produced by combustion are forcedly discharged to the outdoors, therefore, the air indoors won’t be consumed and polluted. This removes some of the dangerous factors related to the potential of an insufficient oxygen supply and Carbon Monoxide poisoning.

This model can be installed in the home with a horizontal exit directly to an outside wall.


Featuring fully automatic ignition that is controlled by a flow sensor, which is triggered by the movement of water when a faucet or water tap is opened.


Water volume and gas flow are regulated independently, allowing for a very accurate control of the desired pre-set water temperature.


The burner and heat exchanger are designed by using an advanced combustion theory, incorporating features of high efficiency and clean and complete combustion performance.


In order to meet the needs of well users and those living at high altitudes, we specially designed a low water pressure ignition for this product.


Computer controlled ignition and water flow sensor allow for maximum efficiency.


Multiple safety protection devices. For example, in case of a sudden flame out or lack of water supply or electrical power, the systems provide an instantaneous automatic shut-off.


”Set it and forget it” technology. Set your EZ SUPREME tankless water heater to the desired temperature and the computer controlled system will keep the flowing water at a constant temperature, no matter the change in water flow.

(NOTE: Within the limits of the design and specified GPM capacity)


Design includes easy to operate LCD display of temperature settings, which can be adjusted using the simple “+” and “-“ buttons.

(NOTE: Normal bath water temperature is a b o u t 1 0 5 ° F just for your reference.)


This product’s safety features are lab tested. Please be careful and follow all State and

Local regulations and codes when installing and using your tankless water heater.



No manufacturer builds a tankless heater that can hold sediment and mineral deposits inside. Tank type heaters often have deep sediment loads that build up over years and accumulate in the bottom of the tank. By design, there is no place in a tankless heater for this accumulation of sediments and minerals. Over time, your tankless heater will become less and less efficient unless you address the issue of water quality. This must be done at the time of installation. Even though you may have city water, there may still be unacceptable levels of sediment and minerals that can harm your tankless heater in a short period of time. Consideration of care for your water heater must include evaluation of your water quality. If the water quality exceeds the target levels provided in this table, to prevent build-up of sediment and minerals in the interior of your heater, you must pre-treat or condition the incoming water supply with a filter and/or softener system.





Gas type


Rated gas pressure

Nominal heat input (temperature rise 25


C) Qn

Gallons per minute rating

Application water pressure

Energy Factor

Min. start water pressure

Electricity power supply

Maximal input power

Over current protection fuse

Insulation grade

Electricity and water protection grade

Ignition method

Temperature control method

Temperature display

Overall dimensions

Packing dimensions

Gas-fired tankless water heater



Natural Gas or LPG


LPG (0.46) (11"wc)/NG (0.29) (8"wc) kW 50 (164,000 btu)

G/min 6.4 GPM @ 45 degree rise (F) psi 20 ~ 100 PSI

.84 psi 20

V, Hz 115V

~ 6 0Hz

W 48

V, A 125V, 2A

Class I


Water controlled auto- pulse ignition

Gas proportional valve auto-control

In Celsius (see conversion chart below)


D 6.5” – W 15.0” – H 28.0”

inches 10.0" x 16.5" x 28.0”

Pipe joint

Gas inlet

Water inlet

Water outlet

Exhaust duct

G3/4 USA

G3/4 USA pipe thread

G3/4 USA pipe thread

Φ120mm (external), Φ80mm (internal)


Read the technical instructions before installing the gas water heater . Installation by trained

professionals only.

Read the user ’s instruction manual before lighting the appliance.



Q - I don't have any hot water when I open the tap!

A - Make sure there is gas, water and electricity to the Water Heater (the power is turned on and the gas is turned on)

Q - When I was using the hot water, the water got cold!

A - If you adjusted the flow from the tap to lessen it, you may have gone below the minimum flow required. The Water Heater requires a minimum flow rate to operate (see specification page for flow rate of your unit). If you mix the water with a tap and attempt to get a temperature well below the temperature being controlled by the unit, it may drop the flow below the desired minimum flow rate. Simply decrease the temperature supplied by the Water Heater at the control panel or increase your total flow.

Q - White smoke comes out of the exhaust!

A - During colder weather when the exhaust temperature is hotter than the air, the exhaust fumes condense producing white steam.

Q - When I open a hot tap. I do not immediately get hot water!

A - Hot water must travel through your plumbing from the Water Heater to the faucet.

The time period for hot water to reach your fixture is determined by the amount of water in your plumbing system between your water heater and the fixture, water pressure, flow rate of fixture in use, etc.

Q - After I turn off the hot water tap, the fan on the Water Heater continues to run!

A - The fan is designed to be on for a few seconds after the flow of water stops. This is to ensure constant water temperatures during rapid starting and stopping, as well as exhausting any residual gas flue products from the unit.



NOTE: All specifications are subject to change without notice.

(EZ-SUPREME manual - March 2012)


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