Black and Decker BD36DWH User Manual

0 (0)

Electric Tankless Water Heaters

Model

BD-36-DWH

temp 118ºF

www.bdwaterheaters.com

Important Safety Guideline

THIS INSTRUCTION MANUAL SHOULD BE SAVED FOR FUTURE REFERENCE.

Definitions: Safety Alert Symbols and Words

This instruction manual uses the following safety alert symbols and words to alert you to hazardous situations and your risk of personal injury or property damage.

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

(Used without word) Indicates a safety related message.

NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.

WARNING: PLEASE READ THIS INSTRUCTION MANUAL THOROUGHLY AND COMPLETELY BEFORE INSTALLATION & USE. FAILURE TO DO SO COULD CAUSE DAMAGE TO PROPERTY, SERIOUS INJURY OR DEATH, AND VOID YOUR WARRANTY.

Please contact us directly, should you have any questions regarding your unit. We are available MondayFriday, 9AM-5PM EST at:

Phone: 1-844-746-6688

Email: info@bdwaterheaters.com

WARNING: Cancer and Reproductive Harm -

www.P65Warnings.ca.gov.

AVERTISSEMENT: Cancer et Troubles de l'appareil reproducteur -

www.P65Warnings.ca.gov.

ADVERTENCIA: Cáncer y Daño Reproductivo -

www.P65Warnings.ca.gov.

For California residents / Pour les résidents de la Californie / Para residentes en California

2

Table of Contents

 

1.

Safety Guidelines-------------------------------------------------------------------------------------

04

2.

About Your Black+ Decker Electric Tankless Water Heater----------------------------------

04-05

3.

Selecting an Installation location--------------------------------------------------------------------

05

4.

Mounting Your Water Heater--------------------------------------------------------------------

06-07

5.

Plumbing Requirements and Precautions-----------------------------------------------------

07-08

6.

Plumbing Installation---------------------------------------------------------------------------------

08

7.

Electrical Requirements and Precautions----------------------------------------------------------

09

8.

Electrical Installation-----------------------------------------------------------------------------

10-11

9.

Flow Rate --------------------------------------------------------------------------------------------

12

10.

Operation Guide----------------------------------------------------------------------------------

12-13

11.

Care and Maintenance--------------------------------------------------------------------------

13-14

12.

User Interface/Controls--------------------------------------------------------------------------

14-15

13.

Troubleshooting----------------------------------------------------------------------------------

16-17

14.

Reset Unit---------------------------------------------------------------------------------------------

18

Before Installing

By installing this product, you acknowledge the terms of the manufacturer’s warranty and authorized dealer’s return policy. Once the heater is installed, do not return the product to the place of purchase. If you have any questions regarding the warranty or the product return policies, please contact us by phone or email.

3

1. Safety Guidelines

Please read this manual thoroughly before installing & using the instant water heater. Failure to comply with the safety, installation or operating instructions will void the product warranty. Manufacturer and distributor of the product will not be liable for any damage or injury caused by the failure to comply with the installation and operating instructions specified in this manual or the improper use of the product. Ensure that this product is installed in accordance with the national, state or local electrical and plumbing codes applicable to your area, and as specified in our instructional guide to get the best performance from your Instant Water Heater.

This product has more than one power connection source. Do not attempt to install, clean, inspect, disassemble, service or repair the water heater without shutting off all the power sources to the unit on the main electrical panel using the circuit breaker.

WARNING: Failure to adhere might result in severe injury or death. The water heater must be installed in compliance with all national, state, provincial and local electrical and building regulations. We recommend that you consult a qualified electrician and a qualified plumber if you have questions about anything relating to codes or regulations for this product.

This product is intended for household and indoor use only. Do not immerse in water.

The breaker used to power this unit must be grounded by means of the electrical panel.

The heater must be directly connected to dedicated circuit breakers on the main electrical panel.

Do not install the heater where it may be subjected to direct sunlight, rain, splashing water, moisture/humidity or freezing temperatures.

This unit is intended for heating water only. Do not attempt to use the unit for heating any other kind of liquid.

2. About Your Black+ Decker Electric Tankless Water Heater

Congratulations on making the decision to purchase one of the best and finest Instant Water

Heaters currently available in the market today! Your new Instant Water Heater features advanced water flow rate and temperature sensors which are designed to modulate power to the heating elements to maintain a user-selected output water temperature range for 36 KW: 86°F (30°C) to 140°F (60°C) (subject to the temperature of the incoming water).

 

 

WARNING: When selecting the water temperature setting of your Instant Water Heater’s

 

 

 

 

 

thermostat, factors such as safety and energy conservation should be considered. Continuous

 

exposure of the skin to water temperatures above 120°F (49°C) can result in severe burns or

 

death. The maximum temperature to be set on this Instant Water Heater’s thermostat is 140°F

 

(60°C). Always take precaution to feel the water before bathing or showering to make sure the

 

temperatures are not too hot. You are required to read and comply with the Time/Temperature

4

Relationship Chart on the following page to determine the right water temperature for your home.

 

 

 

• Children, disabled and elderly are at high risk of being scalded.
• See instruction manual before setting your desired hot water temperature
• Always feel water before bathing or showering

Time/Temperature

Exposure for more than 5 minutes

Relationship in Scalds

 

120°F (49°C)

 

122°F (50°C)

Around 3 minutes of exposure

You may require a 120°F (49°C) or lower thermostat setting to prevent contact with “HOT” water, if you have small children, disabled, or elderly persons in your home. The temperature of the water is regulated by the electronic control on the front of the water heater.

3. Selecting an Installation Location

• This Water Heater is designed for indoor installation only.

• It should not be installed in a location where it might be subjected to freezing temperatures as the freezing of the water

in the Water Heater can lead to severe and irreversible damages which are not covered under your warranty.

The Water Heater should not be placed in a location that is difficult to access.

Ensure that the water heater, as well as the power supplies and water connections, are out of reach of children as the outlet water pipe can get very hot and touching can lead to injury.

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 underwater 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.

Do not install in areas which can be damaged due to leakage from the Water Heater. However, safety measure such as suitable drip pan or an active water leak detector and shutoff valve should be installed in such areas that cannot be avoided.

Item #

Unit dimensions (inches)

Weight (lbs)

Connections

BD-36-DWH

23.23 x 4.53 x 14.77

16.23

3/4”

WARNING: Water heaters are heat producing appliances. In order to avoid damage, injury or death, there shall be no materials stored against the water heater and proper care shall be taken to prevent unnecessary contact (especially by children) with the water heater. UNDER NO CIRCUMSTANCES SHALL FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT THINNER BE USED OR STORED IN THE VICINITY OF THIS WATER HEATER OR ANY LOCATION FROM WHICH FUMES COULD REACH THE WATER HEATER.

5

4. Mounting Your Water Heater

1.Your tankless water heater should be secured to a solid mounting surface with four screws, (minimum 1” (25.4mm) long).

2.Ensure that the unit is level before fastening the screws in place.

3.The unit must be installed in an upright position with the water inlet and outlet at the bottom of the unit. Do not install inversely with connections facing up or sideways with connections facing right or left.

4.Do not install the unit above electrical boxes or junctions.

5.The water heater must be installed in a manner that prevents contact with flammable liquids and gases. Keep these flammable materials at least two feet away from the heater and the hot water outlet pipe. The water heater and the hot water outlet pipe must be secured, and out of children’s reach to prevent tampering with controls or contact with an extremely hot pipe.

6.If installing the heater on an upper floor or attic, make sure installation complies with the local codes. Install a drip pan with drainage, or a leak detector and automatic shutoff valve, to prevent damage in case of any leakage.

a.Remove the appliance cover. (Heater cover) (figure 3)

b.Mount the unit on the wall with 4 screws at the marked points (figure 4)

c.Make sure the unit is leveled horizontally, with water inlets and outlets at the bottom

(fig.5)

temp

118ºF

Fig. 3

 

Fig. 4

Do not install upside down or on its side

Water

Pre-Filter

Fig. 5

Fig. 6

6

Fig. 7

Recommended clearances: 12” (304.8mm) above and below the heater 6” (152.4mm) in front of and to the sides of the heater

CAUTION: Please keep any flammable materials at least 24” (609.6mm) away from the water heater and hot water outlet pipe.

5.Plumbing Requirements and Precautions

Please follow all plumbing instructions carefully. This product must be installed in accordance with all national, state, provincial, and local plumbing codes. We recommend consulting with your municipality or a qualified plumber if you have questions relating to plumbing codes for your area prior to installing.

The plumbing installation must be completed before the electrical installation.

• DO NOT solder any pipe with the unit connected to the pipe. The

 

Do not solder any

heat from soldering may cause damage to the flow sensor. Doing so

piping to the unit’s

will void the warranty.

Connection points

The use of a temperature pressure relief valve (T&P) is not required for most installations because the tankless water heater does not use a

storage tank. UL Standard 499 does not require that a pressure relief valve is used, although it may be needed to meet installation codes in

your area. In such cases, the pressure relief valve should be installed in accordance with local codes. It is important to ensure that the unit

is operating correctly, and that air is purged from the valve prior to installing the water heater.

• A T&P valve is recommended for added safety when connecting to plumbing rated Metal,

Flex or High-Temperature CPVC piping.

 

NOTE: A pressure relief valve is required for installations in the Commonwealth of

 

Massachusetts and State of Kentucky. Please check your local installation codes

 

for any special requirements.

 

• The plumbing installation requires piping that can withstand pressure up to 8 BAR.

 

• The maximum operating water pressure for this unit is 150PSI / 10BAR. Residential plumbing

 

systems with unstable pressure or pressure above 5 BAR require the application of a pressure

 

reduction valve set to 4-5 BAR for optimal performance.

 

• The water supply flow rate must be at least 0.5 Gallons per Minute (GPM) to ensure proper

 

operation.

 

• Flexible water hoses are recommended to be used with your water heater when installing

 

your water heater. When connecting the inlet water pipe to the unit, 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. Do not over-tighten the water inlet and outlet connections to avoid

7

severe internal damage to the water heater.

We recommend the installation of a manual shut-off valve (ball valve) on the inlet and outlet of the water heater to create a convenient shut-off point if future maintenance or servicing is required. Before connecting the pipes to the water heater, it is highly essential to flush the lines to eliminate all the plumbing paste or residue in the lines caused by any welding or soldering.

All the water pipes within 3 feet (1 meter) of the inlet and outlet connections are recommended to be rated for high-temperature applications with 150°F (66°C) minimum.

Before proceeding to the electrical installation, run water through the unit for several minutes to flush out any air bubbles from the water line.

6.Plumbing Installation

STEP 1: Thoroughly flush cold supply line of debris.

STEP 2: Connect the HOT WATER line to the water heater OUTLET. The water heater outlet can be seen on the left side of the heater when facing the unit. Connect the COLD-WATER line to the water heater marked COLD WATER INLET which is located on the right side when facing the unit.

* Pre-heated water can be connected to the cold water inlet, where this unit will act as a booster.

STEP 3: After tightening both fittings at the water heater, several hot water faucets should be opened to allow the flow of water through the water heater for at least 2 to 3 minutes. This process purges all the air from the water lines and MUST be performed before turning on the power at the unit.

FAILURE TO FOLLOW THIS STEP MIGHT CAUSE PERMANENT DAMAGE TO THE HEATING

ELEMENTS. (The power to the heater should be turned off and the air purged out of the lines before turning the power on anytime maintenance is performed on the water heater or the homes plumbing system, as air might have been introduced into the plumbing pipes.)

STEP 4: Carefully inspect all connections, units, and the pressure relief device for leaks after the plumbing installation is completed. If there are no leaks present, you can proceed to the electrical installation.

CAUTION: If you detect a water leak from the water heater at this point, turn off the water supply at the shut off valve on the unit’s incoming water supply and contact us at 1-844-746-6688.

Plumbing Specifications

Minimum water flow to activate the unit

0.5 gpm

Working pressure

0.5–10 BAR (7–150 psi)

Tested pressure (maximum)

20 BAR (290 psi)

Water connections

3/4” NPT

8

7. Electrical Requirements and Precautions

Manufacturer recommends that this product be installed in accordance with all applicable national, state, provincial, and local electrical codes. Consult a qualified and licensed electrician if you have questions or are unsure about anything relating to codes for this product. The heater must be connected to a dedicated circuit breaker on the main electrical panel.

WARNING: As with all electrical appliances, it’s crucial to first shut off all power to the unit directly at the fuse or breaker box before attempting to install, repair or disassemble this water heater. Ensure that the breaker is shut off. SERIOUS BODILY INJURY OR DEATH COULD OCCUR

IF YOU IGNORE THIS WARNING.

CAUTION: All wiring (wire gauge), as well as circuit protection (breaker), 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 lead to property damage, 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 (check heater specification details below).

Before installing this tankless water heater, ensure that sufficient electrical power is available in the home to handle the maximum amperage load of the applicable heater.

IMPORTANT NOTES:

36kW heater requires 3 set of wire and ground (see wiring diagram on page 11)

Please see electrical specifications by heater input and wiring diagram on the page 11 for additional electrical information.

9

8. Electrical Installation

STEP 1: Take the wire pair and connect to the breaker (see wiring diagram). Be sure that the breaker is connected to one black wire and one red wire. Be sure the power to the unit is shut off using the dedicated circuit breakers in the main electrical panel.

STEP 2: Run the correct set of power cable wires from the circuit breaker in the main electrical panel to the water heater by utilizing a suitable wire gauge which meets all applicable electrical codes for the size of the breaker. Then, connect the power cable to the block terminal within the water heater.

STEP 3: Unit requires a ground conductor for the incoming circuit.

STEP 4: DOUBLE CHECK the electrical connections and ensure the wire connections are correct, tight and secure. It’s important to confirm that the right breaker size and wire gauge has been used and that the unit has been connected to a ground in accordance with applicable codes. Be sure to reattach the front cover of the unit with two screws.

STEP 5: Ensure that all the air has been purged from the water lines before turning on power to the unit. Refer to STEP 3 in the plumbing installation section. Restore power to the unit through the dedicated circuit breaker in the main electrical panel.

It is crucial to follow the wire connection as shown and ensure all connections are made correctly for proper operation of the unit. The unit will not operate correctly, even though it turns on and otherwise appears to function, if you mix up one set of wire with another.

10

Electrical Specifications by Heater Input

 

 

 

 

 

 

 

 

 

 

 

 

Item #

kW

Max

 

Required Breaker

Req. Wire Size

 

 

 

Amps

 

 

 

 

 

 

BD-36-DWH

36

150

 

4 x 40A Double Pole

4 x 8/2 AWG with Ground

Power Rates

 

 

 

 

 

 

 

 

 

Item #

 

 

240V

 

220V

 

208V

 

BD-36-DWH

 

36,000 Watts

 

30,250 Watts

 

27,040 Watts

 

Wiring Diagram for BD-36-DWH

Terminal Block in Unit

L1

L2

L1

L2

L1

L2

L1

L2

L1

L2

L1

L2

L1

L2

L1

L2

240V

 

240V

 

240V

 

240V

8/2 AWG

 

 

 

 

 

 

 

8/2 AWG

8/2 AWG

8/2 AWG

Unit Requires 10 AWG ground wire - one for each 240V circuit

Your tankless water heater is now installed and ready to use! Follow the General Operating Instructions to complete the setup.

11

9. Flow Rate

The chart below indicates maximum temperature rise for a given flow rate

 

 

INLET GROUND WATER TEMP

 

 

Item #

kW

30°F

40°F

50°F

60°F

70°F

BD-36-DWH

36

6.2

5.15

4.4

3.9

3.1

 

 

Based on 105°F Output Water Temp

 

 

10. Operation Guide

Operating your new tankless water heater is similar to using any traditional water heating system. However, it is essential that you carefully read all setup procedures, 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.

This electric water heater is designed to supply hot water. The unit contains heating elements within, capable of heating water quickly on-demand for as long as you need it. 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 understand it works like a conventional tank system.

Tankless system delivers hot water instantaneously on demand. Since a tankless system does not waste energy continually when heating water, i.e. idly sitting and losing heat in a storage tank, it provides significant energy savings than a conventional water heater.

With your new system, as soon as you turn on the hot water faucet, the demand for hot water is detected by a flow sensor, and the high-power heating elements are activated. Sensors continually monitor the water flow rate and measured the incoming and outgoing water temperature. Data is transmitted to the system logic controls, which determines the exact amount of power required by heating elements to heat the water to your desired temperature.

It is essential to keep in mind that all tankless water heaters are subject to a maximum flow rate. If this flow rate is exceeded, the heater will not be capable of sufficiently heating water.

Also keep in mind that conventional tank heaters are set to high temperatures to prevent running out of hot water quickly, and thus a large amount of cold water needs to be mixed in to reach a comfortable level for washing and showering. Since this unit heats water on demand, it is designed to heat to a lower temperature. This means you only need to mix in a small amount of cold water or none at all.

Your hot water supply may also be affected by the incoming water temperatures as the season differs. During winter, if the incoming water temperature is frigid, you might not be able to run multiple hot water outlets at the same time as compared to the summer. However, you can run showers back-to-back without having to wait for the water to heat.

Water Quality: One of the things which should be taken into consideration when installing and maintaining the water heater is the quality of water. Water conditions outside the recommended 12 levels outlined below are not permitted and can damage the water heater. We reserve the right to deny any warranty claim regarding damage suffered due to use in water conditions that are not

in accordance with the table below. The water must be treated, and the heater flushed regularly when this product is installed in an area that is known to have hard water that causes scale buildup to prevent damage to the heat exchanger and heating elements. We recommend that a water treatment device or water softener should be installed to maintain optimal performance of the water heater in hard water areas.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chart for Recommended Water Quality levels

 

 

 

pH

Total

Free

Total

Aluminum

Chloride

Copper

Iron

Manganese

Zinc

 

 

Dissolved

CO2

Hardness

 

 

 

 

 

 

 

 

Solid (TDS)

 

 

 

 

 

 

 

 

 

6.5

Up to

Up to

Up to

Up to

Up to

Up to

Up to

Up to

Up

 

-

500

500

200

0.2

250

1.0

0.3

0.05

to 5

8.5

mg/L

mg/L

mg/L

mg/L

mg/L

mg/L

mg/L

mg/L

mg/L

 

11. Care and Maintenance

To ensure maximum performance of your water heater and to reduce the risk of a water leak, we recommend the following maintenance:

The water heater has minimally required maintenance procedures. Periodic inspections and tests are always recommended for signs of damage or failure. Any damage, cracks, leakage or weakness should be addressed and fixed immediately. Do not over tighten any of the connections. Over tightening the connection points could cause severe internal damage to the unit.

Remember that water heated at higher temperatures produces scale buildup much faster than at lower temperatures. Having manual shut-off/maintenance valves installed on the inlet and outlet of the water heater will allow access to flush the unit with a descaling solution. We recommend routine maintenance once a year or once every six months if the water supply has an unusually high level of mineralization (hard water)

Clean the pre-filter on the inlet water side once every six months. Wash lightly to remove any debris.

When any form of maintenance is carried out on the water heater or the home’s plumbing system that may introduce air into the plumbing pipes, it is crucial to power off the water heater and purge the air out of the lines before allowing the unit to power up.

FAILURE TO DO SO COULD RESULT IN PERMANENT DAMAGE TO THE HEATING ELEMENT AND VOID YOUR WARRANTY.

When air is introduced into the plumbing system, follow the steps below to ensure the unit can safely resume operation.

1.Shut off all power connections to the unit at the circuit breaker on the main electrical panel.

2.Perform the maintenance or servicing tasks.

3.Open one or more hot water faucets and allow water to run through the unit for several 13

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 complete this step may cause permanent damage to the heating elements.

4.Reconnect power to the unit at the circuit breaker on the main electrical panel. Press and switch the ON position.

5.With the water running through the unit, check and reset the temperature if necessary. The recommended temperature setting is 118°F (48°C).

12. User Interface/Controls

Power

Press button, the display will turn on

Press button again, the display will turn off

Setting the Output Water Temperature

To set the temperature, first turn on a hot water faucet and allow water to run through the heater. The digital display lights up and shows the current temperature setting.

To increase or lower the temperature setting,

press

increase the temperature or

to

decrease the temperature.

 

Pressbutton to raise the

temperature (up to 140°F / 60°C) or Pressbutton to lower the

temperature (as low as 86°F / 30°C)

temp 118ºF

Temperature can be set to any temperature from 86°F (30°C) to 140°F (60°C).

A comfortable temperature for bathing and showering is between 105°F (41°C) and 110°F (43°C).

The recommended temperature setting is 118°F (48°C), which will deliver hot water for all household needs at a maximum water flow rate.

CAUTION: A higher temperature setting is not recommended, as it can cause severe scalding injuries to children and elderly persons. Higher temperatures also produce more scale buildup in water heating devices.

14

Starting the system for the first time

1.Press button, to activate the heater to display outlet temperature.

2.With the water running through the unit, pressor to adjust the temperature.

Freezing Temperatures

If the ambient temperature falls below 32°F (0°C), protect the heater from potential damage. Power off the unit using the dedicated circuit breaker on the main electrical panel. Open a faucet slightly to cause water to flow continuously through the device at a very low rate, without heating. Restore power to the unit when temperature condition is normal.

If the water inside the heater freezes, it can cause damage that is not covered by warranty. If you suspect water has frozen within the unit, do not turn it on until you are sure the frozen water has melted, and there are no leaks in the unit. It is recommended to contact a qualified electrician or the manufacturer for service in this situation.

temp 118ºF

Digital temperature display Temperature setting Buttons

Power Button Cold water inlet

Hot water outlet

(to be connected to the main hot water pipe)

15

13. Troubleshooting

Before calling for service, check the troubleshooting list of common issues.

If you are unable to resolve a problem, contact your locally authorized distributor.

 

 

 

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSE

 

 

SOLUTION

 

 

ISSUE

 

 

 

 

 

 

No hot

Power outage or

Check the power supply. Check the circuit breakers.

 

 

water and

faulty wiring.

 

 

 

 

 

Make sure the breakers at main electrical panel are ON.

 

 

display do

 

You may have a faulty breaker or unit may be wired

 

 

NOT light up

 

incorrectly.

 

 

 

 

Make sure the shutoff valve on the unit’s incoming water

 

 

 

 

supply line is fully open.

 

 

 

The flow rate needed

Increase the flow rate from the water supply source.

 

 

 

to activate the heating

 

 

 

 

 

 

Clean the filter screen on the unit’s water inlet.

 

 

 

element (0.5 gpm) has

 

 

 

 

 

 

not been reached.

 

 

 

 

 

No hot

Reset the unit

Refer to manual (Page 18) for diagram of reset points.

 

 

water and

 

 

 

Make sure to shut all power on your breaker panel

 

 

display

 

 

 

 

 

 

before attempting to reset unit. All resets must be

 

 

DOES light

 

 

 

 

pressed.

 

 

up

 

 

 

Potential internal part

Please call us for further technical assistance.

 

 

 

 

 

 

failure

 

 

 

 

 

Water is

The water flow rate

Reduce the water flow rate at the faucet or slightly close

 

 

heated,

exceeds the heating

the shutoff valve on the unit’s incoming water supply line

 

 

but not hot

capacity of the heater.

to reduce the water flow rate.

 

 

enough.

 

 

 

 

 

 

Voltage less than 240

The heating elements on your water heater are designed

 

 

 

Volts

for 240 volts. When used with a lower voltage, they

 

 

 

 

produce less heating power. You may need to upgrade

 

 

 

 

to a larger input heater.

 

 

 

Crossed Wires.

If it’s a new installation, double check the wiring to

 

 

 

 

confirm that it is correct.

 

 

 

Temperature setting is

Increase the temperature setting on the unit.

 

 

 

too low.

 

 

 

 

 

 

Water pressure is less

Make sure the shutoff valve is fully open, and the water

 

 

 

than 0.5 BAR (7 psi).

supply line is not blocked.

 

 

 

Mixing too much cold

You do not need to mix as much cold water with your

 

 

 

water

tankless water heater compared to when you use a

 

 

 

 

conventional water heater. You may also have an anti-

 

 

 

 

scald feature on your faucet that is mixing cold water.

 

 

 

 

These types of faucets can usually be adjusted to reduce

 

 

 

 

the amount of cold water mixed.

 

 

 

Thermal loss due to

As the hot water from the heater runs through the hot

 

 

 

long pipe run.

water delivery system to your faucet, some heat will be

 

 

 

 

lost especially if it has long distance to travel or the pipes

 

 

 

 

are cold. This is normal. You can compensate for this by

 

 

 

 

increasing the setting on your water heater if you need/

16

 

 

 

want hotter water.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water is

Voltage less than 240

The computer chips in your tankless water heater are

heated,

Volts

programmed with the expectation that your incoming line

but not hot

 

voltage is 240 volts. If you have less than 240 volts [i.e.

enough.

 

208V or 220V], it may affect the reading on your water

 

 

heater’s digital display and cause it to read slightly higher

 

 

than the actual output temperature. To compensate

 

 

for this, increase the setting on your water heater if you

 

 

need or want hotter water.

Water is too

The water flow rate

Increase the flow rate at the water outlet.

hot.

through the heater is

 

 

too slow.

 

 

Temperature setting is

Switch to a lower temperature setting.

 

too high

 

 

Water Temperature at

Check for too little flow, or if the set point temperature is

 

faucet is too hot.

too high. This could possibly indicate a possible internal

 

 

part failure. Call us for technical assistance.

Heater

Power outage or

Check the power supply. Check the circuit breakers.

shuts off

faulty wiring.

 

If the problem persists, please call us for further technical

during use.

 

assistance.

Water stops

Possible Blockage in

Make sure the main water line valve is fully open, and

flowing.

water pipes or hoses.

there are no obstructions in the water supply line.

Water

Water pressure has

Increase the flow rate from the water supply source.

temperature

dropped below a

 

varies from

minimum level.

 

hot to cold

 

 

during use.

 

 

17

Black and Decker BD36DWH User Manual

14. Reset Unit

As with all electrical appliances, it is crucial to first shut off all power to the unit directly at the fuse or breaker box before attempting to reset this water heater.

WARNING: SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE THIS WARNING.

Locate the four reset button locations as shown below and press all buttons. If you hear a “click,” the unit has reset. If you find that the unit needs to be reset quite often, please call our customer service for further assistance. Proceed to turn on your breakers and power on the unit.

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