Bradley Keltech HL Series User manual

Installation
Keltech Incorporated
A Subsidiary of Bradley
729 S. Grove St., Delton, MI 49046
[phone] 999 4320
Fax: [phone]
www.bradleycorp.com
215-1823 Rev. F; ECN 18-17-017
© 2018 Bradley
Page 1 of 49 3/29/2018
Keltech®HL-Series
Tankless Heater Models
Modèles de chauffe-eau
instantanés Keltech®série HL
Modelos del calentador sin
tanque Keltech®serie HL
Voltage options:
208V Single and Three Phase
240V Single and Three Phase
277V Single Phase
380V Single and Three Phase
400V Single and Three Phase
415V Single and Three Phase
480V Single and Three Phase
Choix de tension :
208 V monophasé et triphasé
240 V monophasé et triphasé
277 V monophasé
380 V monophasé et triphasé
400 V monophasé et triphasé
415 V monophasé et triphasé
480 V monophasé et triphasé
Opciones de voltaje:
208V trifásico y monofásico
240V trifásico y monofásico
277V monofásico
380V trifásico y monofásico
400V trifásico y monofásico
415V trifásico y monofásico
480V trifásico y monofásico
HL05, HL06, HL10 & L10,
HL15 & L15, HL18 & L18, HL25

2
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Table of Contents
Pre-Installation Information ...............................................................................3-4
Storage Instructions ......................................................................................4
Mounting Heater.........................................................................................5
Plumbing Installation ....................................................................................6-7
Electric Installation .......................................................................................8
Start Up Check List ......................................................................................9
Start Up ..............................................................................................10
NEMA 1 Digital Controller Operation ........................................................................11
NEMA 4/4X Digital Controller Operation .....................................................................12
Perform Operational Test No. 1 ............................................................................13
Perform Operational Test No. 2 ............................................................................13
Product Options ........................................................................................14
Maintenance ..........................................................................................15
Troubleshooting ......................................................................................16-17
Special Installation and Operating Instructions ..............................................................18-19
Table des matières
Avant l’installation.....................................................................................20-21
Entreposage ...........................................................................................21
Montage du chauffe-eau .................................................................................22
Pose de la tuyauterie ..................................................................................23-24
Installation électrique .................................................................................... 25
Liste de vérification de mise en marche......................................................................26
Mise en marche ........................................................................................27
Fonctionnement de la commande numérique NEMA 1 ..........................................................28
Fonctionnement de la commande numérique NEMA 4/4X ....................................................... 29
Essai de fonctionnement n° 1 .............................................................................30
Essai de fonctionnement n° 2 .............................................................................30
Options de produits .....................................................................................31
Entretien .............................................................................................32
Dépannage..........................................................................................33-34
Contenido
Información previa a la instalación........................................................................35-36
Instrucciones de almacenamiento ..........................................................................36
Montaje del calentador...................................................................................37
Instalación de plomería ................................................................................38-39
Instalación eléctrica .....................................................................................40
Lista de verificación para el arranque .......................................................................41
Arranque..............................................................................................42
Operación del controlador digital NEMA 1....................................................................43
Operación del controlador digital NEMA 4/4X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Realice la prueba de funcionamiento n.° 1 ...................................................................45
Realice la prueba de funcionamiento n.° 2 ...................................................................45
Opciones de productos .................................................................................. 46
Mantenimiento .........................................................................................47
Solución de problemas.................................................................................48-49

3
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
DANGER
Tipover hazard. System can crush you resulting in serious injury or death. Read and follow precautions in this
installation manual that accompanied the heater for instructions on how to safely transport and anchor heater.
Do not transport with the heater in the vertical position. This heater is top heavy and should not be placed in
the vertical position until the site is prepared to anchor to the wall.
WARNING
Read this manual BEFORE using this equipment. Failure to read and follow all safety and user information
could result in death, serious personal injury, minor burns, property damage, or damage to the equipment.
Keep this Manual for future reference. Failure to comply with proper installation and maintenance instructions
could contribute to the heater’s failure.
ASSE standard 1016, 1069 or 1070 listed devices should be used at fixtures to prevent possible injury. Severe
bodily injury including scalding, chilling, and/or death may result depending upon system water pressure
changes and/or supply water temperature changes.
For safe operation of the heater, observe all warning labels as indicated.
Water heater system under pressure. Do not open enclosure while in operation.
These heaters should never be used to provide “anti-scald” or “anti-chill” service.
Hazardous voltage inside enclosure may result in serious burns or death. Disconnect power supply before
performing any work in the enclosure.
Failure to ground this system may result in death or serious injury.
Make sure that all water supply lines have been flushed and then completely turned off before beginning
installation. Debris in supply lines can cause valves to malfunction.
CAUTION
Hot pipes! Do not touch. May cause minor burns.
NOTICE
These heaters do not provide protection from supply or outlet pipe freezing.
Consult local building and plumbing codes prior to installation. Should these codes differ from the information
in the Manual, follow the local codes. Inquire with governing authorities for additional local requirements.
Regular checking and cleaning of the heater’s internal components and check stops is necessary for maximum
life and proper product function. Periodic inspection and yearly maintenance by a licensed contractor is
required. Corrosive water conditions, and/or unauthorized adjustments or repairs could render the heater
ineffective for its intended service. Frequency of cleaning and inspection depends upon local water
conditions. For heaters with adjustable output temperatures, check and adjust as needed at initial installation
and on a quarterly basis.
IMPORTANT
Read this entire installation manual to ensure proper installation. When finished with the installation, file this
manual with the owner or maintenance department. Compliance and conformity to local codes and ordinances
is the responsibility of the installer. Product warranties may be found under “Products” on our Web site at
www.bradleycorp.com.
Separate parts from packaging and make sure all parts are accounted for before discarding any packaging
material. If any parts are missing, do not begin installation until you obtain the missing parts.
A qualified plumber or electrician should install and service this system. Install system according to these
instructions and in compliance with national and local codes.

4
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Pre-Installation Information
General Information
The Keltech Tankless Water Heater provides instant and precise temperature-controlled hot water. To insure proper
performance, install the heater according to the following installation instructions and in compliance with applicable
national and local codes.
Keltech can supply heaters for most commercial and industrial hot water applications. Flow rates and temperature
figures are important for proper sizing. If needed to meet certain temperature demands, flow control devices are
readily available. See temperature rise table for specifications. Contact KELTECH, INC. for further information on
available flow control devices.
Operation and Setup
HL-Series heaters supply an unlimited amount of hot water with specific flow and temperature rise capabilities. These
heaters are energy efficient, reliable, and provide optimum performance in the most demanding applications.
Application Specific Requirements
The HL-Series can be used in many different applications that require custom tuning for specific applications to
maximize performance of the heater.
For use in a recirculation loop, the incoming loop temperature should not exceed 140°F (60°C).
For applications utilizing quick close valves or solenoid valves, it is important to install a hammer arrestor or surge
tank close to the point of use to absorb pressure spikes.
Installation Considerations
Maximum operating pressure: 150psi (10 bar)
Standard flow activation: 0.5 gpm (1.9 lpm)
Certifications
Keltech Electric Tankless Water Heaters are certified by ETL to UL499, cETL listed to CSA-C22.2 No. 88 and third
party certified to NSF/ANSI 372.
WARNING For safe operation of the heater, observe all the warning labels as indicated.
Storage Instructions
NOTICE! Keep Keltech Electric Tankless Water Heaters stored in original packaging until installation.
Recommended storage criteria:
Store Keltech Electric Tankless Water Heaters where temperatures exceed 35ºF (2º C) at all times.
Indoor storage is required.
Minimize excessive on-site transport to reduce risk of shock and impact damage.
Packaging
Box dimensions approx: 30" x 15" x 6" (762mm x 381mm x 152mm)
All boxes must be stacked evenly and horizontally.
Safety issues related to packaging:
• Product should be transported with the care associated to packages labeled “FRAGILE” even if packaging is not
marked accordingly.
• Standard safety procedures for forklift transport and large items less than 1000lbs (454 kgs) should be followed at
all times.

5
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Mounting Heater
1
WARNING HIGH VOLTAGE SHOCK. Disconnect power supply before performing any work inside
the heater enclosure.
For best results, install heater as close as possible to the point of use.
Installation should be performed by a qualified plumber or electrician.
Long pipe runs are not recommended. A heat loss of 1°F for every 10ft (3 meters) of uninsulated
pipe can occur.
When determining a mounting location, give consideration to the location of the main electrical panel
and ensure accessibility of the cabinet enclosure cover and other plumbing for service/maintenance.
Side View - Wall Mounting Holes (NEMA 1)
ASet heater in a vertical, upright position
with the water inlet and outlet located at
top.
Depending on the application, the unit
may also be installed rotated clockwise
90° with the inlet and outlet to the right.
B
Mount heater to the wall using the (4) mounting
brackets on the back of the enclosure. Bolt the
heater to the vertical surface. Mounting holes
are designed for a maximum bolt size of 1/4"
(6mm) bolt diameter.
CInstall the pressure and temperature relief
valve on hot water outlet immediately
following the union.
NOTICE! Valve must empty into a drain.
Heater should be mounted on a vertical
surface and securely hold a minimum of
45 pounds. Use lead or plastic anchors
when mounting directly onto concrete or
block walls.
13"
(330)
2.75" (70)
13.5"
(343) 23"
(584)
14"
(356)
NEMA1 is standard on 5-18kW models.

6
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Plumbing Installation
2
B
Install one union on the water inlet side of
the heater. Install one 100 Mesh (150 micron)
Y-strainer above (upstream of) union.
Install one union on the water outlet side of
the heater. Install one P&T Relief Valve above
(downstream of) union.
For Non-Teflon heaters: with the heater lying flat,
solder one half of each union to the inlet and outlet
tubes.
Install the pressure relief valve (150 psi/10 bar)
and outlet plumbing of heater per local code
requirements and route relief valve discharge to
drain. Make sure no shutoff valve is between the
relief valve discharge and the drain. Install hammer
arrestor. Ensure plumbing is secure and not
subject to vibrations.
WARNING The heater must be lying flat
to do any soldering on the inlet or outlet
tubes. Soldering on the inlet or outlet tubes
in the upright position can damage internal
components. Damage caused by dripping
solder or flux can make your heater inoperable.
CUse 3/4" hard copper tubing or pipe as needed.
AInstall shutoff valve above (upstream of) the heater
inlet.
CAUTION To avoid damage to the electronics or
internal wiring, do not perform any brazing
or sweat soldering inside the enclosure.
NOTICE! Failure to install proper filtration may result in
a flow switch malfunction.
NOTICE! To avoid water damage, install a drain
pipe from the pressure relief valve to an
unrestricted drain per local code requirements.
If end use fixture is not at the highest point in
the plumbing loop, then an automatic air vent
valve must be added at the highest point in the
system or at any drop to eliminate trapped air.
Components Needed:
• (2) Union 3/4"
• Shutoff Valve
• Pressure and Temperature Relief Valve (150 psi/10 bar)
• Y-Strainer (100 mesh) or Inline Filter (150 microns)
• (2) Gate or Ball Type Valves
• Drain pipe
• Elbows, nipples and fittings as needed
• Water hammer arrestor (recommended)
Dimensions,
Plumbing
and Electrical
Configurations
NEMA 1 2" (51)
HL Outlet 3/4" Copper
11"
(279)
HL Inlet 3/4" Copper
1.3"
(33) 1.5"
(38)
1.3"
(33)
4.7"
(119)
1.1"
(28) Pressure Relief
Valve (if Local Code
Requires)
Outlet
Inlet, 3/4"
Copper
Inlet, 3/4"
Copper
Threaded Unions
Y-Strainer, 100 Micron
Recommended
Ball or Gate Valves
Inlet
Power Entrance
Suggested Installation
Configuration
Components provided by installer
unless otherwise specified.
Reference the product options
sections or contact your local
Bradley Representative for
product options.
L-Series heaters have 1/2" inlet and outlet and require 1/2" copper tubing.

7
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Plumbing Installation cont...
2
25-1/2"
(648)
3/4" Female
NPT Outlet 11"
(279) 3/4" Female
NPT Inlet
2-5/16"
(59)
2"
(51)
24"
(610)
14-1/2"
(368)
16"
(406)
7" (178) N4
8-3/4" (222) N4X
Dimensions,
Plumbing
and Electrical
Configurations
NEMA 4/4X
(HL Models
5-18kW)
31-1/2"
(800)
3/4" Female
NPT Outlet 11"
(279) 3/4" Female
NPT Inlet
2-5/16"
(59)
2"
(51)
30"
(762)
14-1/2"
(368)
16"
(406)
7" (178)
Dimensions,
Plumbing
and Electrical
Configurations
NEMA 4/4X
(Model HL25)

8
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Electric Installation
3
B
NEMA 1: A pre-cut hole is already sized for
conduit connection. Skip to step C.
NEMA 4/4X: Using a hole punch, cut a hole
the proper size for conduit connection; large
enough for the wire size for each heater. The
connectors need to be rated NEMA4/4X to
ensure proper sealing of the enclosure.
AFor NEMA 1 enclosures, remove the four screws
and take the bottom cover off. For NEMA 4/4X
enclosures, open the enclosure door.
CRun wires through the appropriate size conduit.
DConnect wires to the system terminal block
inside the enclosure.
EConnect the ground wire to the stud provided
with the “Ground” label beneath it.
NOTICE! Any option that requires field wiring must
be done with a wire rated for the maximum
voltage of the heater.
NOTICE! Use a three for a single phase or a four core
cable for three phase from an approved
isolating two or three pole switch or circuit
breaker to the terminal block of the heater.
NOTICE! Make sure the electrical cable is the correct
size to carry 100 % of the full load current.
See table for proper wire sizes.
WARNING Install product to rated line voltage in
accordance to current local and national
codes and regulations.
WARNING All Keltech heaters must be fused in
accordance with National Electric Code
(NEC) for the full load amperage listed
on the nameplate rating for each heater.
WARNING Failure to properly ground the unit(s) per
the National Electric Code could result in
injury or death.
ELECTRICAL SPECIFICATIONS FOR HEATER
(Single Phase)
Model Voltage Amps kWatts Min Wire
Size
HL060/480D 480 13 6 12 AWG*
HL180/480D 480 38 18 6 AWG*
HL060/415D 415 6 4 12 AWG*
HL180/415D 415 19 13 10 AWG*
HL060/380D 380 6 4 12 AWG*
HL180/380D 380 17 11 12 AWG*
HL060/277D 277 22 6 10 AWG*
HL180/277D 277 65 18 3 AWG*
HL050/240D 240 21 5 10 AWG*
HL060/240D 240 25 6 8 AWG*
HL100/240D 240 42 10 6 AWG*
HL180/240D 240 75 18 3 AWG*
HL050/208D 208 24 5 10 AWG*
HL060/208D 208 29 6 8 AWG*
HL100/208D 208 48 10 4 AWG*
HL180/208D 208 87 18 3 AWG*
* Based on the NEC Table 310.15 for 75°C insulated copper wire @ 30°C
Ambient. Aluminum wire requires larger gauges.
ELECTRICAL SPECIFICATIONS FOR HEATER
(Three Phase)
Model Voltage Amps kWatts Min Wire
Size
HL103/480D 480 13 10 12 AWG*
HL183/480D 480 22 18 10 AWG*
HL103/415D 415 10 7 12 AWG*
HL183/415D 415 19 13 10 AWG*
HL103/380D 380 10 6 12 AWG*
HL183/380D 380 17 11 12 AWG*
HL153/240D 240 36 15 6 AWG*
HL183/240D 240 43 18 6 AWG*
HL153/208D 208 42 15 6 AWG*
HL183/208D 208 50 18 4 AWG*
HL103/208D 208 28 10 8 AWG*
HL253/480D 480 30 25 8 AWG*
Not all available (optional) voltages are listed in table.
F
If unit is ordered with a D1 or DC controller option,
the DB9 connector for hookup on a standard
unit is located on the upper left/hinge side of the
cabinet. Please review the appropriate Special
Installation & Operation Instruction section for
information regarding controller programming and
wiring. Proceed to the Start Up Checklist once
the steps in the Special Installation & Operation
Instructions section have been completed or
if you do not have this option.

9
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Start Up Check List
4
Plumbing
System is set in a vertical, level, and upright position with the outlet located at the top (installing the heater on
its back, for example, will trap air in the heat exchanger). System is mounted to the wall using the (4) mounting
holes located on the back of the enclosure.
Confirm installation of shutoff valve above (upstream of) the union on the inlet connection. Confirm installation of
a Y-strainer (100 mesh screen) or inline filter (150 micron) between the inlet shutoff valve and the heater.
Pressure and temperature relief valve is installed on tepid water outlet immediately following the union. No valve
or restriction is between the relief valve and the system or the relief valve and drain. Shutoff valve is installed
after pressure and temperature relief valve on outlet if required by local or national plumbing codes.
If the hot water process is not at the highest point in the plumbing loop, then an automatic air vent valve must be
added at the highest point in the system plumbing loop to eliminate trapped air.
Electrical
Verify supply voltage matches the indicated voltage on the Serial Tag. Serial Tag is located within the heater
enclosure on the upper left corner of the back plate (mounting plate).
Appropriate conduit is installed properly, secured and sealed to unit enclosure per NEC.
Appropriate conductors for unit routed through conduit and secured to power block inside the enclosure
(See Electrical Specifications chart). All electrical is installed in accordance with national and local electrical
codes, including fuse size and rating.
Appropriate earth ground is installed to the lug provided within the enclosure.

10
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Start Up
5
ASlowly turn on water supply to the unit
with the enclosure cover open and the
circuit breaker in the off position.
CTurn off the connected process and
check the entire system to verify leak-free
installation.
DSecure the enclosure cover (standard
NEMA 1) or door (NEMA 4/4X).
EEnergize the electrical service to the unit
by switching on the two or three pole
switch or circuit breaker. Unit is now in
the ready state.
B
Slowly turn on the water outlet valve,
activate the connected process requiring
heated water (faucet, shower, etc.), then
flush the system for 5 minutes to ensure all
air is purged from the system.
NOTICE! Failure to bleed air properly
will damage elements and
cause heater malfunction.
Be sure that plumbing and electrical are complete per Start Up Check List.
WARNING Make sure the circuit breaker for the heater is OFF.
G
When startup is complete, leave the two
or three pole switch or circuit breaker
in the ON position. The digital display
should read ambient temperature and
OFF.
FTurn on the connected process; observe
output temperature rise to setpoint.
On NEMA 1 controller, set point and
output temperatures are located side
by side. On the NEMA 4/4X controller,
the top portion of temperature controller
displays output temperature, bottom
displays setpoint temperature.
NEMA 4 is standard on model HL-25.
If unit is ordered with the D1 option, the
controller is shipped with this option
deactivated. Contact the factory to get the
unlock code to activate the option.

11
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
NEMA 1 Digital Controller Operation
6
Keys and Displays Function
Setpoint Up and Down Buttons In the Home Page, adjusts the set point in the right display. In other
pages, changes the upper display to a higher or lower value, or changes a
parameter selection.
Infinity Key ∞Back to Home page
Advance Key Advances through parameter prompts
Output Indicators (1-5) Number lights indicate activity of outputs 1 through 5. A flashing light
indicates retransmit activity.
Setpoint Temperature
(Right Side Display)
Displays:
• Setpoint
• Percent Power
• Temperature units °F or °C
• Menu prompt name
• Alarm code
Output Temperature
(Left Side Display)
Displays:
• Actual process temp. of outgoing water
• Prompt parameter value
• Error code
Output
Temp. Output
Indicators
Setpoint
Temp.
Infinity
Key Advance
Key
Setpoint
Up Setpoint
Down
Output
Temp.
Setpoint
Temp. Output
Temp.
No Flow
The pre-programmed digital controller is mounted through the bezel on the enclosure door/cover. The
digital controller will be powered but the display will read OFF until water is flowing through the heater. The
display will then display the setpoint temperature (See appropriate Digital Controller Operation section for
more information).
Layout Diagram ON - Heating OFF - No Flow
Refer to table and drawings below for instructions on changing the desired set point temperature of the
controller.

12
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
NEMA 4/4X Digital Controller Operation
7
Keys and Displays Upper Display Lower Display Function
Setpoint Up Button Increases output temperature
Setpoint Down Button Decreases output temperature
Infinity Key Back to Home page
Advance Key Advances through output parameters
Output Indicators (1-5) Output 1,2,3,4 or 5 are active and operating if
these LEDs are illuminated.
Setpoint Temperature
(Lower Display)
Displays:
• Setpoint
• Percent Power
• Temperature units F or C
• Menu prompt name
• Alarm code
Output Temperature
(Upper Display)
Displays:
• Actual process temp. of outgoing water
• Prompt parameter value
• Error code
Output Indicators
Output Temp. Output
Temp. Output
Temp.
No Flow
Setpoint
Temp.
Setpoint Temp.
Setpoint Up
Setpoint Down
Advance KeyInfinity Key
EZ Key
Layout Diagram ON - Heating OFF - No Flow
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5

13
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Perform Operational Test No. 1
Perform Operational Test No. 2
8
9
BStart the water flow through the heater by
starting the process or fixture this heater is
connected to in order to activate heater.
ATurn on hot water faucet/fixture/process. The
heater should activate immediately.
DPress the up or down arrow keys to
adjust the set temperature. The controller
displays the temperature of water
measured at the outlet.
BTurn off hot water faucet/fixture/process.
The flow switch will deactivate and shut
off power to the heater.
ETest water temperature and stability at
outlet by viewing the display. Controller
displays (in red) the temperature of water
exiting the heater.
C
When flow rate reaches approximately 0.5gpm
(1.9 lpm), the flow switch recognizes this
condition and begins the heating process.
When the flow switch activates:
• The display changes from OFF to the output
temperature, verifying power supply connection
to the heating elements via the triac switches.
• Element load lights may be solid or flash
in unison as heating elements modulate
depending on the hot water demand.
• Digital temperature controller shows water
temperature. Additional programming is
not necessary.
Heater will not energize heating elements
if the inlet water temperature is equal to
or greater than the temperature set on the
digital controller .
If the water flow exceeds maximum heating capacity of the heater, the temperature of water at the outlet may be lower
than the temperature selected on the controller. See table below to determine maximum temperature rise capabilities.
Each model has precise specifications
for temperature rise capabilities.
Temperature Rise (GPM & F°)
Models 208V, 240V, 277V, 480V kW 1 gpm
ΔT °F 1.5 gpm ΔT °F 2 gpm ΔT °F 2.5 gpm ΔT °F 3 gpm ΔT °F 3.5 gpm ΔT °F 4 gpm ΔT °F 5 gpm ΔT °F 6 gpm ΔT °F 7 gpm ΔT °F
HL05 5 34 23 17
HL06 6 41 27 20
HL10 10 68 45 34 27 23 20 17
HL15 15 102 68 51 41 34 29 26
HL18 18 122 82 61 49 41 35 31
HL25 25 171 114 85 68 57 49 43 34 28 24
Temperature Rise (lpm & C°)
Models 208V, 240V, 277V, 480V kW 3.8 lpm
ΔT °C 5.7 lpm ΔT °C 7.6 lpm ΔT °C 9.5 lpm ΔT °C 11.4 lpm ΔT °C 13.3 lpm ΔT °C 15.1 lpm ΔT °C 18.9 lpm ΔT °C 22.7 lpm ΔT °C 26.5 lpm ΔT °C
HL05 5 19 13 9
HL06 6 23 15 11
HL10 10 38 25 19 15 13 11 9
HL15 15 57 38 28 23 19 16 14
HL18 18 68 46 34 27 23 19 17
HL25 25 95 63 47 38 31 27 24 19 16 13
ASet the 2 or 3 pole switch or circuit breaker to
the ON position.
Ensure the cover is on or enclosure door is
closed prior to performing this operational test.

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HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Output heating capacity is reduced on the 480V units if these heaters are installed on 415V or 380V single or three
phase.
Contact the factory to supply this information.
Satisfactory performance of the heater is dependent upon a specific flow rate vs temperature rise capability. If the
desired temperature is not achieved, please verify the following:
1. Circuit breaker is on and rated for the maximum power draw.
2. Heater is drawing the proper current for the supply voltage on all the single phase or all the three phases.
3. All phase indicator lights are lit (not flashing) indicating maximum power draw and maximum
amperage is being drawn.
4. Flow rate and temperature rise in the water heating process are compatible with the heater specifications.
5. Verify there is no additional supply of cold water entering the line downstream of the heater.
Product Options
AL High-Low Temperature Alarm: Alerts user to an over or under temperature situation.
T190 High Temperature Option: Reach and maintain temperatures as high as 190°F (88°C).
IC Temperature Lock Out: Temperature lock out at specific °F or °C.
Low Flow (L25 & L15): Options include 0.25 GPM (0.9 lpm) and 0.15 GPM (0.6 lpm) for heating water at a lower
flow as required.
D1 Control Interface: Provides 4–20ma communication interface with temperature controller.
DC Control Interface: Is an RS-485 Modbus RTU and allows Building Management Systems to view heater outlet
temperature and heater activation via BMS display as well as change the temperature set-point from the BMS.
TE2 Corrosive Fluid Protection: The TE2 option is a single layer of Xylan Fluoropolymeric coated heat exchanger
with bright annealed stainless steel elements, FDA Approved for Food Contact (use in deionized water applications).
N4X (NEMA 4X Enclosure): The optional NEMA 4X corrosion resistant enclosure is designed for harsher
environments and made from 16 gauge 304 stainless steel. The NEMA 4X enclosure can also be specified as an
upgrade with 316 stainless steel.
N4 (NEMA 4 Enclosure): The optional 18 gauge, NEMA 4 enclosure with ANSI61 gray, corrosion resistant paint.
NEMA 4 is standard on model HL-25.

15
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Maintenance
Preventative maintenance is important for optimal performance of the heater. To ensure the heater works properly,
always keep the inside of the enclosure dry. Moisture inside an enclosure increases the humidity, which condenses
on cooler surfaces. This can cause electrical problems and reduce the efficiency of enclosure insulation. To prevent
problems perform the following:
• Verify the interior of the enclosure is dry.
• Verify there are no leaks in seals of enclosure and that in high humidity environments all enclosure egresses are
properly sealed.
• Ensure plugs are in place on back side of enclosure.
• Check seals monthly during temperatures above 32°F (0°C) and weekly during temperatures below 32°F(0°C).
• Bimetal manual resets are set to trip at 175°F(79°C). If this temperature is reached, the bimetal manual reset
safeties will trip and need to be reset.
• All heaters require filtration of 150 microns or smaller to ensure proper operation.Y-strainers or additional filtration
should be verified and cleaned at least every 6 months or more often in areas where hard water sediment is
present in the water.
To clean the Y-Strainer:
1. Turn the power off at the circuit breaker panel.
2. Shut off the installer supplied cold water isolation valve to the heater.
3. Relieve pressure in the plumbing lines.
4. Position a bucket under the cold water inlet to catch any water that may still be in the pipe.
5. Loosen the plumbing connection on the Y-strainer to get to the screen.
6. Remove screen and clean out debris. Use a wire brush to clean smaller particles from the screen.
7. Once the screen is clean, put it back into the Y-strainer housing and secure the plumbing connection.
8. Before switching the power back on, bleed the air out of the lines by turning heater water supply back on and
the plumbing fixture or process farthest from the heater.
9. With the air purged, turn on all circuit breakers supplying the water heater.
• At the same time the Y-strainer or additional filtration is cleaned, it is a good practice to also check all valves
connected to the system. With no water flow through the heater, work both the inlet ball valves and the outlet gate
valves open and shut to break up any calcium deposits that may have formed from the valve being open for an
extended period of time. Power to the heater does not need to be turned off to do this.

16
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Troubleshooting for Controller
Problem Solution
No Power Verify power is on.
Turn power off. Check continuity of all internal fuses in
control transformer, heating elements or optional Fused
Disconnect circuits.
Check all field service circuit breakers or fuses.
Check system temperature limit control to make sure
it has not activated due to excessive heat exchanger
temperature or faulty sensor.
Turn power off. Check for loose or disconnected wires.
Check the incoming service connection. Voltage must
match name plate rated voltage. Labels are located on the
upper left of back plate (Serial Number Label).
Alarms do not occur. Make sure alarm set points are correct.
Make sure alarm is not latched.
Make sure alarm side settings are correct.
Make sure alarm type settings are correct.
Make sure alarm controller is not in diagnostic mode.
Alarms do not clear. Check power limit setting.
Check operation mode.
Check alarm output function.
Check temperature setting.

17
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Basic Troubleshooting
Problem Solution
The heater does not work or works intermittently. Flow switch works properly.
At the wires from the flow switch, ohm meter should read
Open without flow and Closed with flow.
Water flow through the heater is adequate to activate the
flow switch at 0.5 gpm (1.9 lpm) or at the low flow options
of 0.15 (0.6 lpm) or 0.25 (0.9 lpm) gpm.
Heater is wired with the proper breaker and wire size.
Refer to Electrical Specifications for Heater table in
section 3 for proper requirements.
Unit is receiving voltage from all 3 phases of the power
source. A load voltage reading is also helpful.
If the above steps do not solve the problem, some additional checks may be performed. Follow the
schematic to perform the following continuity checks:
High temperature bimetals (Manual Reset Safeties).
Optional ground fault breaker must be in the closed position for the unit to work.
All internal breakers must be in the ON position for the unit to work.
For additional information on Troubleshooting or other information, please call Keltech Inc. technical support at
1-800-999-4320. Please have Model No. and Serial No. available when seeking technical assistance. Serial No.
tag is located in the enclosure on the upper left hand corner of the back plate. Please record and maintain this
information at all times:
HL- Model No.
Serial No.
Turn power OFF before recording any Ohm readings.

18
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
Special Instructions and Operating Instructions
Tankless Water Heaters with Optional D1 or DC Controller Options
Pin-Out Diagram for Electrical Wiring
23434
78
DC Option Pin-Out D1 Option Pin Out
T+/R+
Signal Ground
T-/R-
Negative
+Current
Negative
+Current
The controller is shipped with the D1 option deactivated. Contact the factory to get the unlock code
to activate the option.
DC Option Pin-Out
Pin Name Description
2 T+/R+ RS-485 Transmit/Receive
Non-Inverting Input/Output
3 Signal Ground Signal Ground
4 T-/R- RS-485 Transmit/Receive
Inverting Input/Output
1, 5,
6-9
-- No Connection
D1 Option Pin-Out
Pin Name Description
3 Negative Return Current Path for
+Current, Pin 4
4 +Current Supply 4-20mA Current to
Set Heater Temperature
7 Negative Return Current Path for
+Current, Pin 8
8 +Current Supply 4-20mA Current to
Monitor Heater Temperature
1, 2, 5,
6, 9
No Connection

19
Installation HL-Series Tankless Heater
Bradley • 215-1823 Rev. F; ECN 18-17-017 3/29/2018
Table of Parameters for DC Option: RS-485 Modbus
Parameter Name Range Map 1 Map 2 Default Data Type Read/ Write HL Series Meaning
Analog Input -1999.000 to 9999.000°F
-1128.000 to 5537.000°C 360 360 -- FLOAT R Process Value
Analog Input Error None (61)
Open (65)
Fail (32)
Shorted (127)
Measurement Error (140)
Bad Calibration Data (139)
Ambient Error (9)
RTD Error (141)
Not Sourced (246)
362 362 None UINT R Process Value Sensor Error
Calibration Offset -1999.000 to 9999.000°F
-1128.000 to 5537.000°C 382 382 Factory Set FLOAT RWES Process Value Calibration
Digital in 5 Inactive (41)
Active (5) 1328 1568 -- UINT R Flow Activation
Digital out 6 Off (62)
On (63) 1042 1162 -- UINT R AL Only Alarm Status
EZ-KEY Inactive (41)
Active (5) 1368 1608 -- UINT R EZ-Key
Control Mode Active Off (62)
Auto (10)
Manual (54)
1882 2362 Auto UINT R Control Loop Mode
Heat Power 0.0 to 100.0% 1904 2384 -- FLOAT R Duty Cycle Output %
Set Point -1999.000 to 9999.000°F
-1128.000 to 5537.000°C 2172 2652 -- FLOAT R Heater Set Point
Remote Set Point No (59)
Yes (106) 2200 2680 No UINT RWES Remote Set Point Enable
Remote Set Point Type Auto (10)
Manual (54) 2202 2682 No UINT RWES Remote Set Point Control Mode
Process Value -1999.00 to 9999.000°F
-1128.000 to 5537.000°C 402 402 FLOAT R Process Value
Control Mode OFF (62)
Auto (10)
Manual (54)
1880 2360 Auto UINT RWES Control Loop Mode
Close Loop Set Point 40-160 std
40-170 T170 Option
40-180 T180 Option
40-190 T190 Option
40-200 T200 Option SPCL
2160 2640 Factory Set FLOAT RWES Heater Set Point
Open Loop Set Point 0 to 100% 2162 2642 -- FLOAT RWES Manual Mode Set Point
Display Units Fahrenheit (30)
Celsius (15)
1838 2308 °F UINT RWES Controller Display Units
Address Modbus 1-247 2482 2962 1 UINT RWE Modbus Address
Baud Rate 9600 (188)
19200 (189)
38400 (190)
2484 2964 9600 UINT RWE Modbus Baud Rate
Parity Modbus None (61)
Even (191)
Odd (192)
2486 2966 None UINT RWE Modbus Parity
Modbus Units Fahrenheit (30)
Celsius (15) 2490 2970 °F UINT RWE Communication Units
Modbus Word Order Low-High (1331)
High-Low (1330) 2488 2968 Low-High UINT RWE Modbus Word Order
Non-Volatile Save Yes (106)
No (59) 2494 2974 Ye s UINT RWE If set to yes, all values to the control will be saved from EEPROM
NOTICE! For adjusting Modbus address, baud
rate and parity, customer needs to set
on Watlow controller per Watlow manual.
Legend
uint = Unsigned 16 bit int
dint = Long 32 bit string = ACSII (8 bit per character float = IEEE 754 32 bit
RWES = Readable, Writable, EEPROM (saved), User Set (saved)

20
HL-Series Tankless Heater Installation
3/29/2018 Bradley • 215-1823 Rev. F; ECN 18-17-017
DANGER
Risque de basculement. Le système peut provoquer des blessures graves voire mortelles par écrasement. Veiller
à lire et respecter consignes de précaution figurant dans ce manuel d’installation fourni avec le chauffe-eau
pour assurer un transport et une fixation du chauffe-eau en toute sécurité. Ne pas transporter le chauffe-eau
en position verticale. Ce chauffe-eau est lourd au sommet et ne devra pas être placé en position verticale avant
d’avoir préparé l’emplacement de pose pour son ancrage au mur.
AVERTISSEMENT
Lire ce manuel AVANT d’utiliser le matériel. Tout manquement à lire et à respecter les consignes d’utilisation et
de sécurité peut entraîner la mort, des blessures graves, des brûlures mineures, des dégâts matériels ou des
dommages à l’équipement. Conserver ce manuel pour toute référence ultérieure. Tout manquement à respecter les
instructions d’installation et d’entretien peut contribuer à une défaillance du chauffe-eau.
Des dispositifs classés suivant ASSE 1016, 1069 ou 1070 devront être utilisés sur les robinets pour écarter le
risque de blessure. Les variations de pression du réseau ou de température de l’eau d’alimentation peuvent
provoquer des blessures graves voire mortelles, notamment par échaudage ou réfrigération.
Pour assurer un fonctionnement sans danger de l’appareil, respecter toutes les étiquettes de mise en garde.
Le circuit du chauffe-eau est sous pression. Ne pas ouvrir l’enceinte durant la marche.
Ne jamais utiliser cet appareil pour offrir un fonctionnement « anti-échaudage » ou « anti-réfrigération ».
La tension dangereuse à l’intérieur de l’enceinte présente un danger de brûlures graves ou de mort. Débrancher
l’alimentation électrique avant toute intervention dans l’enceinte.
Tout manquement à raccorder ce système à la terre peut entraîner la mort ou des blessures graves.
S’assurer que toutes les conduites d’arrivée d’eau ont été purgées puis correctement fermées avant de
commencer l’installation. La présence de débris dans les conduites peut entraîner un mauvais fonctionnement
des vannes.
ATTENTION
Tuyaux très chauds! Ne pas toucher. Danger de brûlures mineures.
AVIS
Ces chauffe-eau ne protègent pas contre le gel des tuyaux d’arrivée ou de sortie.
Consulter les codes du bâtiment et de la plomberie en vigueur préalablement à l’installation. Si ces codes
diffèrent des informations figurant dans le manuel, suivre les codes en vigueur. S’informer auprès des autorités
compétentes s’il existe des exigences locales supplémentaires.
Le contrôle et le nettoyage régulier des éléments internes et des clapets et robinets d’arrêt du chauffe-eau
sont nécessaires pour assurer une durabilité maximale et un fonctionnement correct du produit. Prévoir
obligatoirement des contrôles périodiques et un entretien annuel par un professionnel agréé. Les eaux corrosives
et les réglages ou réparations non autorisés peuvent empêcher le chauffe-eau de fonctionner comme prévu. La
fréquence de nettoyage et de contrôle dépend des conditions locales d’alimentation en eau. Pour les chauffe-eau
à température de sortie réglable, vérifier et ajuster le réglage comme il se doit lors de l’installation puis chaque
trimestre.
IMPORTANT
Veiller à lire ce manuel en entier pour assurer une installation correcte. Lorsque l’installation est terminée,
remettre ce manuel au propriétaire ou au service d’entretien. La mise en conformité et le respect de la
réglementation en vigueur relèvent de la responsabilité de l’installateur. Les garanties de produit figurent sous
« Products » sur notre site Web à www.bradleycorp.com.
Déballer les pièces et s’assurer qu’elles sont toutes présentes avant de jeter les emballages. Le cas échéant, ne
pas commencer l’installation avant d’avoir obtenu toutes les pièces manquantes.
Confier l’installation et l’entretien de ce système à un électricien ou un plombier qualifié. Installer le système
conformément aux présentes instructions et aux réglementations en vigueur.