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CLE Series Tankless Heater

 Installation

10/2/2015 

Keltech • 

215-1822 Rev. A; ECN 140011

DANGER

Tip over 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 the heater to the wall or the legs to the floor.

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.

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.

ASSE standard 1071 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.keltech-inc.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.

Summary of Contents for CLE18

Page 1: ...s CLE18 CLE25 Voltage options 600V 3 phase 480V 3 phase 415V 3 phase 400V 3 phase 380V 3 phase Table of Contents Pre Installation Information 2 3 Storage Instructions 3 Mounting Heater 4 Plumbing Installation 5 Electric Installation 6 Start Up Check List 7 Start Up 8 Digital Controller Operation 9 Operational Tests 10 11 Product Options 11 Maintenance 12 Troubleshooting 12 13 Special Installation ...

Page 2: ...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 ...

Page 3: ... by ETL to UL499 UL50E CSA22 2 No 88 and NFPA 496 Heaters are compliant to NEC NFPA 70 and Canadian Electrical Code C22 1 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 Heate...

Page 4: ...he side of the crate to help with alignment Secure heater by bolting each leg to the floor using 3 8 anchor bolts C Install the pressure and temperature relief valve on hot water outlet immediately following the union NOTICE Valve must empty into a drain For best results install heater as close as possible to the point of use Installation should be performed by a qualified plumber or electrician L...

Page 5: ... 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 Y Strainer 100 mesh or Inline Filter 150 microns 2 Gate or Ball Type Valves Drain pipe Water hammer arrestor recommende...

Page 6: ...ded machine tool wire from an approved isolating 3 pole switch or circuit breaker 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 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 ELECTRICAL SPECIFICATIONS FO...

Page 7: ... 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 tepid 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 vo...

Page 8: ...eed air properly will damage elements and cause heater malfunction Be sure that plumbing and electrical are complete per Start Up Check List NOTICE If your heater is mounted in an area where freezing temperatures are possible an ENHT Freeze Protection Option should be specified Heaters must be powered at all times to be Freeze Protected If continuous power is not possible do not allow the heater t...

Page 9: ...n CLE models Infinity Key Back to Home page Advance Key Advances through parameter prompts Auto Man Off C r71 Turns Control Loop On Manual Off disabled on CLE models XX X h Pr1 Heater Power disabled on CLE models no AUt1 Autotune Contact Factory disabled on CLE models C or F C_F1 Change Temperature Units from F to C Output Indicators 1 5 Output 1 2 3 4 or 5 are active and operating if these LEDs a...

Page 10: ...r display on controller goes from off to setpoint temperature Located on the panel is a 18kW or 25kW green ready light When illuminated the safety circuit is engaged and ready for use 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 ...

Page 11: ...onnection point for DCS monitoring In the event of a power interruption or ENHT system failure when internal enclosure temperatures reach 40 F 4 4 C or lower the unit will notify a facilities control monitoring system that the unit is unable to maintain freeze protection Regardless of state of power to the unit this warning notifies maintenance personnel and provides an opportunity to correct the ...

Page 12: ...peratures above 100 F 38 C causing the manual reset safeties to trip Reset bimetal manual safeties and lower heat trace temperature to below 100 F 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 c...

Page 13: ...cal Specifications Table in Step 3 for proper requirements 2 Unit is receiving voltage from all 3 phases of the power source A load voltage reading is also helpful 3 Verify the functionality of the flow switch 4 At the wires from the flow switch read Open without flow and Closed with flow 5 Water flow through the heater is adequate to activate the flow switch at 0 75 gpm standard IMPORTANT Turn po...

Page 14: ...et fitting here EXP2 Installation Notes 1 Any tubing conduit or fittings connected to the Pressurized Enclosure PE must conform to local codes for flammability ratings 2 All egress into PE must be plugged and properly sealed to minimize leakage of purge air Use hazardous location sealing fittings suitable for Class I locations within 18 of enclosure 3 The EXP2 purge system option is a continuous f...

Page 15: ...osure and the protective gas supply The alarm actuator shall be mechanical pneumatic or electrical Electrical alarms and electrical alarm actuators shall be approved for the location in which they are installed No valves shall be permitted between the alarm actuator and the enclosure Intrinsically Safe IS Installation 1 Electrical equipment connected to associated apparatus should not use or gener...

Page 16: ...NFPA496 requirements No valves may be fitted between the Expo Technologies system and the alarm switch WARNING Never turn on the power without purging first unless you have proved the interior of the PE is gas free and checked that the Pressurized indicator is green Commissioning Test Commissioning Continuous Flow Keltech Options EXP2 System 1 Open the air or gas supply shutoff valve 2 Adjust the ...

Page 17: ...larms function correctly Check the Relief Valve and any other Spark Arrestors Remove any debris or corrosion or replace the Spark Arrestor Check the condition of the air supply filter element Clean or replace it as necessary Periodic Maintenance Every 18 24 months At least every two years the following additional checks are recommended Apparatus Heater Purge Systems Alarms etc is suitable for the ...

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