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11

Installation 

C2N Series Tankless Heater

Bradley • 

215-1821 Rev. B; ECN 16-17-005 

5/3/2016

Output heating capacity is reduced if these heaters are installed on 415V, 400V or 380V 3-ph . 
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 3 phases .
3 .  All 3 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 

GF (Ground Fault):

 Detects electrical leakage from external sources to protect equipment, electronics, and the heat 

exchanger from being damaged in the event of a power fault . After turning on water, then power, test ground fault:

1 .  Press GF Test button .  
2 .  Watch for ground fault light to illuminate and Bank Ready light(s) to shut off . The Ground Fault system is active 

and in working order .  

3 .  Press the GF Reset button, hold for 2 seconds and release to reset ground fault .

FDS Fused Disconnect:

 Internal fused disconnect interlocks with enclosure door when energized, prohibiting access 

to a live cabinet . Select the FDS option for an additional level of safety and convenience at the heater location .

T190 High Temperature Option:

 Reach and maintain temperatures as high as 190°F (88°C) .

D1 Control Interface:

 Provides 4–20ma communication interface with temperature controller .

TE & TE2 Corrosive Fluid Protection:

 The TE option is a PFA Teflon

®

 coated heat exchanger with bright annealed 

stainless steel elements,FDA Approved (use for deionized water or mild corrosive fluid applications) . Similar to TE, 
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) .

EXP2 (Explosion Proof Purge System):

 Keltech's EXP2 option makes heaters compliant for classified areas; 

Class I Division 2, Groups A, B, C, D, Temp Code: T5 . The Purge System requires a supply of clean instrument air or 
inert gas (provided by installer) . This supply maintains a positive internal pressure and prevents the enclosure from 
filling with flammable gases, dusts or vapors from the ambient environment . Complete installation provided in this 
manual .

Low Flow (L5):

 0 .50 GPM (1 .9 lpm) option for heating water when lower flow rates are required .

N4X (NEMA 4X Enclosure):

 Corrosion resistant enclosure made of stainless steel and ideal for harsh environments .

If a trip occurs under normal operation DO NOT RESET Ground Fault without evaluation and 
service. 

Normal state is Ground Fault light OFF, Bank Ready lights ON.

Summary of Contents for C2N363/380D

Page 1: ...ls C2N36 C2N50 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: ... 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 NOTIC...

Page 3: ...zing 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 150 psi 10 bar Standard flow activation 0 75 gpm 2 8 lpm Certifications Keltech Electric Tankless Water Heaters are certified by ETL to UL499 UL50E CSA22 2 No 88 and NFPA 496 for hazardous lo...

Page 4: ...o the vertical surface Vertical surface must support 150 lbs or more Optional Leg Kit Use the floor mounting template on the side of the crate to help with alignment Secure heater by bolting each leg to the floor using 3 8 10mm 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 i...

Page 5: ...10 B 3 3 8 86 8 203 8 3 4 222 Optional Fused Disconnect Suggested Location for Power Entrance Provided By Installer LOAD L LOAD R READY TEST FAULT RESET GROUND FAULT TEMPERATURE CONTROLLER R 1 2 3 4 5 Outlet To Drain Inlet P T Relief Valve Threaded Unions Y Strainer Recommended Suggested Installation Configuration Components provided by installer unless otherwise specified Reference the product op...

Page 6: ...stranded 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 SPECIFICATIO...

Page 7: ...ef 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 vo...

Page 8: ... 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 I When startup is complete...

Page 9: ... output temperature Setpoint Down Button Decreases output temperature Infinity Key Back to Home page Advance Key Advances through parameter prompts Auto Man Off C r71 Turns Control Loop On Manual Off XX X h Pr1 Heater Power no AUt1 Autotune Contact Factory 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 are illuminat...

Page 10: ...the inlet water temperature is equal to or greater than the temperature set on the digital controller Perform Operational Test No 2 8 A Turn on hot water faucet fixture process The heater should activate immediately B Turn off hot water faucet fixture process The flow switch will deactivate and shut off power to the heater If the water flow exceeds maximum heating capacity of the heater the temper...

Page 11: ...fused disconnect interlocks with enclosure door when energized prohibiting access to a live cabinet Select the FDS option for an additional level of safety and convenience at the heater location T190 High Temperature Option Reach and maintain temperatures as high as 190 F 88 C D1 Control Interface Provides 4 20ma communication interface with temperature controller TE TE2 Corrosive Fluid Protection...

Page 12: ...very 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 conne...

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 75gpm 2 8 lpm standard If the abo...

Page 14: ...e Purge gas compressed air inlet 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 458mm of enclosure 3 The EXP2 p...

Page 15: ...losure 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 gene...

Page 16: ...uirements 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 Option EXP2 System 1 Open the air or gas supply shutoff valve 2 Adjust the Flow Control...

Page 17: ...alarms 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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