thermomate ES150 Electric Mini Tank Water Heaters Instructions

Electric Mini Tank Water Heaters
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THERMOMATE ES150 & THERMOMATE ES250 & THERMOMATE ES400 & THERMOMATE ES700
Instructions / Installation Manual

IMPORTANT SAFETY INSTRUCTIONS

WARNING
When using electrical appliances, basic safety precautions to reduce the risk of fire, electric shock, or injury to persons should be followed, including:

1. READ ALL INSTRUCTIONS BEFORE USING THIS WATER HEATER.

2. This water heater must be grounded. Connect only to properly grounded outlet. See “GROUNDING INSTRUCTION” found on page 10.

3. Install or locate this water heater only in accordance with the provided installation instructions.

4. Use this water heater only for its intended use as described in this manual.

5. Do not use an extension cord set with this water heater. If no receptacle is available adjacent to the water heater, contact a qualifed electrician to have one properly installed.

6. As with any appliance, close supervision is necessary when used by children.

7. Do not operate this water heater if it has a damaged cord or plug, if it is not working properly, or if it has been damaged or dropped.

8. This water heater should be serviced only by qualified service personnel.
   Contact nearest authorized service facility for examination, repair, or adjustment.

9. Do not use surge protectors or multi-outlet adaptors with this water heater.

SAVE THESE INSTRUCTIONS
The thermomate and/or distributor is not responsible for damages caused by improper installation, or by non-observance of the instructions in this manual.
A qualified, licensed technician must always install the water heater and conduct all subsequent service work and or maintenance.
IMPORTANT
THE TANK COMPLETELY FULL WITH WATER AND HAVE WATER FLOW- ING FROM THE HOT WATER FAUCET BEFORE ACTIVATING POWER TO THE HEATER FOR THE FIRST TIME OR DAMAGE WILL RESULT.

Technical Data

Model| THERMOMATE
ES150| THERMOMATE
ES250| THERMOMATE
ES400| THERMOMATE
ES700
---|---|---|---|---
Capacity (Gallons)| 1.| 3.| 4.0| 7.
Voltage (VAC)| 120| 120| 120| 120
Power @ 120 VAC (Watts)| 1440| 1440| 1440| 1440
Max. Water Pressure (PSI)| 150| 150| 150| 150
Weight (empty) (LBS.)| 11.0| 15.| 20.| 27.
Amperage (Amps)| 12| 12| 12| 12
Phases| 1| 1| 1| 1

THERMOMATE ES150/THERMOMATE ES250/THERMOMATE ES400/THERMOMATE ES700 General information
The thermomate mini tank water heaters can be used in most under the counter, point of use applications. The thermomate models are designed to supply hot water for all hand washing and kitchen sinks in a residential, commercial or industrial environment.
The thermomate mini tank water heaters are slow recovery, small reservoir, not intended for showers or filling tubs.
Thermomate models can replace traditional central hot water heaters thereby conserving water and reducing energy waste. Thermomate models can also be plumbed in series with the central water heater and act as a booster.
The thermomate mini tank water heaters are light weight, compact and designed for easy installation. Thermomate models can be wall mounted with included hardwares or floor mounted.
The THERMOMATE ES150, THERMOMATE ES250, THERMOMATE ES400 and THERMOMATE ES700 are designed to operate at 150PSI maximum water pressure. Install a pressure relief valve if your water pressure is greater than 150PSI.
CAUTION
Thermomate cannot be responsible for the damage caused by improper installation or by failure to follow instructions in this manual. Comply with the installation instructions before connecting to electrical outlet.
CAUTION
The thermostats on this water heater have been set at the factory to 125°F (51.7°C) or lower to reduce the risk of scald injury;
Locate the front panel and temperature adjustment knob on the water heater.
The recommended starting setpoint is identified on the dial as 125°F (51.7°C).
The red indicator at the center of the display will illuminate when the water is heating. When the water in the tank is at the desired temperature, the red indicator will NOT be illuminated. If you choose a higher temperature, Be sure to read and follow the warnings outlined on the label below. This label is also located on the water heater near the top of the tank.
Thermostatic Mixing Valves located at each point-of-use are particularly important to help avoid scalding.

Temperature| 120°F (49°C)| 125°F (52°C)| 130°F (54°C)| 135°F (57°C)| 140°F (60°C)| 145°F (63°C)| 150°F (66°C)| 155°F (68°C)
---|---|---|---|---|---|---|---|---
Time to Produce a Serious Burn| More than 5 minutes| 1-1/2 to2 minutes| About 30 seconds| About 10 seconds| Less than 5 seconds| Less than 3 seconds| About 1-1/2 seconds| About 1 seconds

CAUTION
Hydrogen gas builds up in a hot water system when it is not used for a long period ( two weeks or more). Hydrogen gas is extremely fammable. If the hot water system has not been used for two weeks or more, open a hot water faucet for several minutes at the kitchen sink before using any electrical and most distant sink being served by this water heater before using any electrical appliance connected to the hot water system. Do not smoke or have an open flame or other ignition source near the faucet while it is open.
WARNING
Installer should review the contents of this manual with the owner upon completion of the installation, and the manual should remain with the owner and placed in a location close to the water heater.

Technical Description

There are 4 thermomate mini tank models, 1.3, 2.5, 4.0 and 6.5 gallon model.
The pressure vessel (water tank) is welded, glass lined steel and is equipped with an anode rod. The water heater is equipped with a thermostat and a high temperature limit switch. A temperature pressure relief valve is supplied with the unit.

Installation Instructions

THERMOMATE ES150/ THERMOMATE ES250/ THERMOMATE ES400/THERMOMATE ES700
The installation must be completed by a licensed professional. All state and local codes must be adhered to. Thermomate will not be liable for any damag- es because of failure to comply with these installation instructions or because of improper installation performed by an unqualified installer.
Choose a location
That allows ease of access for maintenance or servicing, ideally installed at least 9” clearance at the top from the ceiling, cabinet, or any adjacent walls.
Wall mounting
Fasten the supplied mounting bracket to the wall. Use screws that are suitable for the wall material and the weight of the water heater filled to capacity (THERMOMATE ES150=22.0 Ibs, THERMOMATE ES250=37.5 Ibs, THERMO- MATE ES400=53.0 Ibs, THERMOMATE ES700=81.6 Ibs). Hang the water heater on the bracket and pull downwards on the water heater to ensure that both “fingers” of the bracket are seated in the mounting slots.
Confirm your water piping orientation (hot and cold) before wall mounting.
Only install in vertical position. The water heater can sit on the floor in a tray with a drain.
Confirm water piping orientation before finalizing on floor. Again, only install in vertical position! thermomate models THERMOMATE ES150, THERMO- MATE ES250, THERMOMATE ES400 and THERMOMATE ES700 can be installed under the sink.

Plumbing Connections

Connect the cold-water inlet pipe to the inlet nipple (marked with a blue ring) and the hot water outlet pipe to the outlet nipple (marked with a red ring).
IMPORTANT
If water pipes are copper or bronze, use dielectric connections to prevent corro- sion. Failure to provide dielectric insulation may result in premature tank or nipple failure and may void your warranty. Ensure that the water heater is installed in a level position. Install a shut off valve on the cold- water side of the water heater. The valve is for servicing and the valve should be in the open position when the water heater is in operation. In order to protect the water heater from heat damage due to soldering, solder a piece of tubing to a t hreaded union fitting before screwing the union to the tank.
Do not apply heat directly to inlet or outlet connections.

Temperatures & Pressure Relief Valve

CAUTION
To reduce the risk of excessive pressures and temperatures in this water heater, Install the Temperature and Pressure protective equipment required by local codes and no less than a combination temperature and pressure relief valve certified by nationally recognized testing laboratory that maintains periodic inspections of production of listed equipment or materials, as meeting the requirements for relief valves and Automatic Gas shutoff devices for Hot water supply systems ANSI 121.22. This valve must be marked with a maximum set pressure not to exceed the marked maximum working pressure of the water heater (150 PSI).
Install the T/P valve into an opening provided and marked for this purpose in the water heater,and Orient it or provide tubing so that any discharge from the valve exits only within 6 inches above, or at any distance below the structural foor, and does not contact any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances.
T/P valve discharge pipe

1. Must not be smaller in diameter than the outlet diameter of the valve, or have any reducing couplings.
2. Must not be plugged or blocked.
3. Must be made of suitable material for hot water.
4. Must not be over 15” in length.
5. Must not have more than two elbows.
6. Must terminate at an adequate drain.
7. Must not have a shut off valve between relief valve and tank or relief valve and termination of discharge.

Closed system thermal expansion
Periodic discharge of the T/P relief valve or failure of the element gasket may be due to thermal expansion in a closed water supply system. The water utility supply meter may contain a check valve, back flow preventer or water pres- sure reducing valve which will create a closed water system. During the heating cycle of the water heater, the heated water expands causing pressure inside the water heater to increase. The T/P relief valve may discharge hot water under these conditions which results in a loss of energy and a build up of lime on the relief valve seat.
To prevent this from happening, there are two recommenda-tions

1. Install a diaphragm-type domestic hot water expansion tank (suitable for potable water) on the cold-water supply line. The expansion tank must have a minimum capacity of 1.5 U.S. gallons for every 50 gallons of stored water.
2. Install a 150 PSI pressure relief valve in the cold-water supply line. Make sure the discharge of this valve is directed to an open drain and protected from freezing. Contact your local water utility or plumbing inspector for information on how to control this situation. Never plug the outlet of the relief valve.

Filling The Water Heater

CAUTION
Before plugging in the water heater power cord into an outlet, be sure that the system is completely charged with water and all air is removed.
Before connecting the power, fill the tank and system with water and check for leaks. To be sure that all air is out of the water system, open the hot water faucets on your fixtures until constant water flows. Any air remaining in the tank will cause the water heater element to fail.
Filling the water heater

1. Open the hot water faucet.
2. Open the cold-water supply valve.
3. When continuous water flows out of the faucet, the tank is filled.
4. Close the hot water faucet.
5. Check entire system for leaks.

Electrical Connections

To be certain that all of the air is out of the water heater, open the hot water faucet on your fixtures until constant water flows from them. If air remains in the tank, the element will be damaged when the electric cord is plugged in.
GROUNDING INSTRUCTION – Connect the water heater to a grounded outlet. The water heater is fitted with a power cord that is intended to plug into a grounded 120 V/AC receptacle. Adhere to all pertinent State and local codes. Install the correct size circuit breaker into the master panel. The thermomate mini tank water heater was manufactured and wired in accor- dance with UL requirements.
The water heater is equipped with an overheat limiting device with a manual reset. Also known as the temperature high limit, this device has been factory installed to interrupt the power supply in the event of a thermostat failure.
This water heater is designed for 120V service-Do not connect to any other voltage. Failure to use proper voltage may result in personal injury and/or property damage. If the supplied electrical power cord is either dam- aged or not long enough, do not use an extension cord. Have a licensed electrician replace the power cord.

Instructions For Use

Congratulations! You are now ready to use your water heater. Run the hot water at a nearby sink and evaluate the hot water temperature. Make any temperature adjustment using the section below:
Setting the thermostat
The water heater is equipped with an adjustable thermostat that once set will automatically control water temperature. The red indicator lamp remains illuminated while the water is being heated. If the water in the tank is at the desired temperature the lamp will not be illuminated.
The temperature adjusting knob will increase the temperature by turning the knob clockwise and decrease the water temperature by turning the knob counter clockwise.
When not being used for a lengthy period of time, you can conserve energy by reducing the water temperature setting.
Setting the freeze protection
When the water heater is not being used for an extended period of time and there is a risk of freezing, either unplug and drain the water heater or turn the thermostat knob to the snowflake position to guard against freezing. This position will keep the internal water temperature above the freezing point.

Maintenance Instructions

Do not attempt to repair this water heater yourself. Call a service person (plumber or electrician) for service assistance. Always unplug the power supply cord when the water is turned off or when servicing or draining the water heater.
Before calling for service, first confirm that the water heater is properly filled and that 120V/AC power has not been interrupted.
WARNING
Before servicing or cleaning the water heater, disconnect the power cord from the electrical outlet.
Note: For most maintenance operations, the water heater will need to be drained. In all cases before draining first unplug the power cord.
Draining and removing the water heater

1. Unplug the water heater.
2. Open a hot water faucet to let hot water run out. Allow water to flow until water is no longer hot.
3. Turn off the cold-water supply to the water heater.
4. Close the hot water faucet.
5. Disconnect the water heater from both the hot and cold-water connections.
6. If possible siphon out remaining water.
7. Carefully detach the water heater from the wall.
8. Tilt the water heater to drain remaining water out of the heater.

Removing the heating element

1. Unplug water heater power cord and drain (see previous paragraph).
2. Remove cover.
3. Remove all the line wires from the heating element.
4. Unscrew the heating element retaining nuts.
5. Remove the element.

Descaling the heating element:
Scale deposits can affect the heating capability of the element. Heavy scale can even cause the element to burn out. The element can be descaled chemi- cally or manually.

1. Remove the heating element (see previous paragraph).
2. To descale chemically, soak the heating element in white vinegar or other descaling solution and then rinse well with fresh water.
3. To descale manually, let element dry and then using a non-metallic brush similar to a tooth brush; brush the residue from the element. Avoid damaging the surface of the element.
4. Reinstall the element and gasket.
5. Refill tank with water before plug in the power cord.

Replacing the heating element

1. Unplug and drain the water heater (see page 11).
2. Remove heating element noting original positions of all connections.
3. Install new element with gasket making sure the new element and gasket are positioned correctly.
4. Tighten retaining nuts and make the wire connections to their original locations.

Changing the thermostat

1. Unplug water heater power cord from the electrical outlet.
2. Drain and remove the water heater. (see page 11)
3. Remove the bottom panel of the water heater and remove the panel.
4. Remove thermostat knob and unscrew two retaining screws. It may be necessary to pry the knob off the thermostat spindle. Now remove front panel.
5. Disconnect the push-pull wire connectors on the thermostat noting which connector goes to which terminal. Terminals are marked.
6. Remove the thermostat probe from the well.
7. Install new thermostat, attach wires and tighten screws.

Resetting the high limit switch
For various reasons the high limit safety shut off switch will occasionally shut the water heater down. This shut down will occur when water temperatures exceed 140°F(60°C). Power is automatically turned off to the heating element.
The shut off device may activate as a result of a power outage or an electrical storm.
Note: Do not attempt to reset the high limit switch without first allowing the water heater to cool down the high temperature water inside the heater.
WARNING
Do not tamper with the reset button to override overheating shut down.

1. Unplug water heater power cord from the electrical outlet.
2. Drain and remove the water heater. (see page 11)
3. Remove six screws retaining the bottom panel of the water heater and remove the panel. Locate the high limit reset button.
4. Depress the small red button in the center of the junction box, replace the bottom panel and place the water heater back into service.

Note: A lower temperature setting saves energy and reduces the risk of scalding.
CAUTION
Call a technician if the high limit needs to be reset frequently.

Troubleshooting

Problem: Water does not get hot

1. Make sure the power supply is on and working.

2. If light does not turn on, check that the reset button is pushed in; follow steps from previous section.

3. If the indicator light is illuminated, but water temperature does not get hot at the sink, test for a plumbing cross over as follows; shut off cold water supply to water heater and open hot water tap. There should be no water flowing.
   Any continuous flow indicates a cross over which will affect the temperature and will need to be corrected.

4. If there is no crossover, then replace the heating element (see previous sections).

Problem: Indicator light not on

1. If the light does not turn on, but water gets hot, check for faulty bulb.
2. Check reset button; follow steps from previous section.

Problem: Water is too hot

1. Turn the temperature knob counter clockwise to a lower temperature setting.

If temperature does not lower within 60 minutes, then replace thermostat.
Problem: Water is not hot enough

1. Under Instructions for Use, see “Setting the thermostat”.

Problem: Water is leaking

1. Unplug water heater power cord from the 120V/AC outlet.
2. Check water fittings and T&P fitting in the top of the tank.
3. Remove cover and inspect heating element gasket.

Thermomate Mini Tank Water Heaters-Limited
Three (3) Years Warranty Coverage
Thermomate warranties this water heater to the Owner (hereinafter “Owner”) of the water heater at the original installation location against defects in material and workmanship for the periods specified below.

Warranty Period

1. When a failure of the inner tank of a thermomate mini tank water heater, installed in a single family, residential application and exposed to normal usage (not including recirculating applications), occurs within three (3) years from the date of the original installation and is supplied with potable water, deemed not to be hard water, and such failure is proven to be a result of a defect in material or workmanship or within one (1) year if used as part of a recirculating application or in a non-single family residential application, or with hard water, thermomate will furnish to such owner a new water heater of the then prevailing comparable model.
2. If any component part (other than the inner tank) is proven to be defective in material or workmanship within one (1) year from date of original installation in a single family, residential application used with potable water deemed not to be hard water or within one (1) year if used as part of a recirculating system, or with hard water, or if used in other than a single family residential dwelling, thermomate will furnish the Owner with a replacement of the defective part(s).
3. Verification of Date of Original Installation- When Owner can not verify or document the original date of installation, the warranty period begins on the date of manufacture marked on the tag affixed to the water heater.

Exclusions

1. This limited warranty shall be the exclusive warranty made by the thermomate and is made in lieu of all other warranties, expressed or implied (whether written or oral), including, but not limited to, warranties or merchantability and fitness for a particular purpose.

2. The thermomate shall not be liable for any incidental, consequential, special or contingent damages or expenses arising, directly or indirectly, from any defect in the water heater or the use of the water heater.

3. The thermomate shall not be liable for any water damage arising, directly or indirectly, from any defect in the water heater component part(s) or from its use.

4. Thermomate shall not be liable under this warranty if:
   a) The water heater or any of its component parts has been subject to excessive water pressure, misuse, abuse, alteration, neglect or accident, or
   b) The water heater has not been installed in accordance with the applicable local plumbing, electrical and/ or building code(s) and/or regulation(s), or
   c) The water heater has not been installed in accordance with the printed thermomate’s instructions, or
   d) The water heater is not continuously supplied with potable water, otherwise described as dry firing
   e) The water heater is exposed to conditions resulting from floods, earthquakes, winds, fire, lightning or circumstances beyond the control of the thermomate
   f) The water heater is installed by non-qualified personnel.

5. The owner and not the thermomate nor his agent/representative shall be liable for and shall pay for all field charges for labor or other expenses incurred in the removal and/or repair of the water heater or any expense incurred by the Owner in order to repair the water heater.

Some states do not allow the exclusion or limitation of incidental or conse- quential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may vary from state to state.
IMPORTANT
Owner should retain this document.
Note: Most tank water heaters eventually leak. Your thermomate water heater should be installed in such a manner that if it should leak, the resulting flow of water will not cause damage to the area in which it is installed.
How the owner can secure service assistance or make a warranty claim

1. Owner should contact the dealer who sold the water heater covered by this warranty or

2. Owner should submit the warranty claim directly to thermomate at the address listed below, and they will arrange for the handling of the claim.

3. Whenever a warranty service request is made, be sure to include Proof of
   Purchase, the water heater model number and the date of manufacture, date of installation, Dealer’’s name and the watts and voltage.

4. When returning the water heater or component part(s), they must be individually tagged and definite with Returned Goods Authorization # issued by thermomate and shipped prepaid to thermomate at the address below.

Schematic Disassembly & Parts List

| Spare parts| QTY
---|---|---
1| Power indicate light| 1
2| Panel| 2
3| Front cover| 1
4| Thermal cut-out| 1
5| Panel fix screw| 2
6| Flange nut| 5
7| T shape screw| 5
8| Heating element| 1
9| Tank component| 1
10| Back cover| 1
11| Injection hole cover| 1
12| Rivet|
13| Red pipe circle| 1
14| Blue pipe circle| 1
15| Blue protect cover| 1
16| Red protect cover| 1
17| Water inlet pipe| 1
| Spare parts| QTY
---|---|---
18| Water outlet pipe| 1
19| Plastic sleeve| 2
20| Magnesium anode| 1
21| Heating element| 1
22| Rubber stopper| 1
23| Cross srew| 1
24| Thermostat| 1
25| Power cord press plate| 1
26| Fix screw| 2
27| Fix screw| 2
28| Fix screw|
29| Screw cover| 2
30| Thermostat button| 1
31| Power cord| 1
32| Power plug| 1
33| Inside connect wire| 1

1(844) 334-4203
www.thermomate.com
support@thermomate.com
8350 Patriot Blvd STE B, North Charleston, SC 29420

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