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INSTALLATION INSTRUCTIONS 

AND 

OWNER’S MANUAL

ELECTRIC INSTANTANEOUS WATER HEATERS WITH 

PhD 

208 and 480 VAC three phase 32 

– 126 kW

600 VAC three phase 130-150 kW

BEFORE ATTEMPTING ANY INSTALLATION OR SERVICE OF THIS 
HEATER, MAKE SURE THE ELECTRICAL POWER IS DISCONNECTED.  
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN 
SERIOUS INJURY, DEATH AND/OR PROPERTY DAMAGE. 

Read and understand these instructions thoroughly before attempting the installation or service of this water 
heater.  This heater must be used to heat water only and be in a location where it is not subject to freezing 
temperatures.   If a water softener is used, the softener must be well-maintained and in good working order.  
Any maintenance issues with a water softener could be detrimental to the operation or longevity of your 
Eemax tankless water heater.   The manufacturer is not liable for any damages resulting from improper 
installation or misuse. The warranty of this water heater will depend upon the proper installation according 
to these instructions.  Refer to the warranty card packaged with this heater.

This installation must conform to the latest requirements of the National Electrical Code and all applicable 
state and local codes.  This information is available through your local authorities.  You must understand and 
comply with these requirements before beginning this installation.  Eemax recommends your heater be 
installed by a licensed plumber and electrician.  User instructions for the unit controls start on page 6.

This unit is not required by UL 499 to have a Temperature and Pressure relief valve (T&P).  You should check 
with local codes to find out if one is required in your area.  If it is, it must be installed in the outlet hot water 
pipe between the heater and the isolation valve. 

This heater features a user friendly digital interface for ease of operation.  Information is displayed through 
a 16 character alpha numeric LCD and is controlled by 4 simple push buttons.  The unit features silent 
operation and internal diagnostics.  The desired temperature can easily be set or altered as necessary.  Once 
the desired temperature is achieved, the control can be locked to avoid tampering. 

1

EX07200-15  Rev  3

Summary of Contents for 208 VAC

Page 1: ...according to these instructions Refer to the warranty card packaged with this heater This installation must conform to the latest requirements of the National Electrical Code and all applicable state and local codes This information is available through your local authorities You must understand and comply with these requirements before beginning this installation Eemax recommends your heater be i...

Page 2: ...al of the electric service or supply panel with a continuous copper wire in accordance with your local electrical code Do not install in a bath enclosure or shower stall or connect to a salt regenerated water softener or a water supply of salt water Use copper conductors only 2 1 MOUNTING THE HEATER TO THE WALL PAGE 3 2 PLUMBING HOOK UP PAGE 3 3 ELECTRICAL HOOK UP PAGE 4 4 COMMISSIONING THE HEATER...

Page 3: ...ated by the arrows right and fasten the heater to the wall using the mounting holes located at each corner of the back plate lower right Be sure to use appropriately rated fasteners to hold the heater in place 2 PLUMBING HOOK UP The heater is equipped with NPT brass fittings Make sure ONLY NPT fittings are used for connection to this heater Make the cold water inlet connection to the lower RIGHT f...

Page 4: ...listed wire conductors of the appropriate size suitable for up to 90 C and protected by the correctly rated circuit breaker See chart on next page Before starting any electrical work VERIFY there is no power at the heater before proceeding The power conductors are to be secured to the L1 L2 and L3 connectors on the terminal block The ground is to be secured to the GND connector to the right of the...

Page 5: ...SETPOINT TEMPERATURE in degrees F Below the display are 4 push buttons that are used to control the function of the heater Press the UP or DOWN buttons to establish your desired temperature Refer to the CONTROL FEATURES section of this manual for additional information The heater is fully installed and ready for use ELECTRICAL SPECIFICATIONS VOLTS AMPS RECOMMENDED MODEL 3 PHASE DELTA Kw PER PHASE ...

Page 6: ...SH BUTTON FLOW CHART 1 The SETPOINT TEMP or ACTUAL TEMP screen can be selected for display as the home screen Either of these screens will remain on the display when the backlight timer expires 2 There is a 5 minute time delay built into the control Regardless of which screen is being displayed after 5 minutes of inactivity the display will revert to the SETPOINT TEMP screen 3 The 4 push buttons a...

Page 7: ...ts of measure in either the ENGLISH or METRIC systems ENGLISH units are degrees Fahrenheit and gallons per minute METRIC units are degrees Celsius and liters per second Use the UP and Down buttons to select the desired units of measure 10 From the UNITS screen one press of the RIGHT button will shift the display to the SOFTWARE REVISION screen This shows the revision level of the software in the c...

Page 8: ...the lower the flow the higher the temperature and vice versa Keep the INLET BALL VALVE fully OPEN NEVER RESTRICT THE WATER FLOW USING THE INLET VALVE E1 Inlet temperature too hot to generate heat FAULT CODES F0 Thermistor out of range F1 No change in water temperature detected F2 Dry fire detected Optical Sensor Tripped F4 Excessive dry fire occurrences detected 13 The security of the heater setti...

Page 9: ...and 4 mounting screws Transformer Control Board Fuse Flow Meter Kit Hall Effect Board behind Flow Meter Triac SSR not shown Heating Element Assembly Optical Sensor Board Emergency Cut Off Contactor 9 13 The display can be turned off or on Press and hold the DOWN and RIGHT buttons for 3 seconds If the display is off it can be turned on by pressing and holding the same DOWN and RIGHT buttons for 3 s...

Page 10: ...0 01 EX08601 00 Heating Optical Element Sensor Emergency Model Triac Relay Assembly Board Cut Off Contactor AP032208 EX78002 00 EX77000 8 12 EX78001 00 EX278A KIT EX08306 02 AP041208 EX78002 00 EX77000 6 33 EX78001 00 EX278A KIT EX08306 00 AP054208 EX78002 00 EX77000 4 81 EX78001 00 EX278A KIT EX08309 00 AP064208 EX78002 00 EX77000 4 06 EX78001 00 EX278A KIT EX08309 00 AP036480 EX78002 00 EX77000 ...

Page 11: ...er If you need any assistance from our Technical Service Department make sure you can identify this water heater by having the model no ____________________ and serial number _____________________ Call 203 267 7890 or toll free 800 543 6163 Email info eemaxinc com Web www Eemax com Eemax Inc 400 Captain Neville Drive Waterbury CT 06705 11 ...

Page 12: ...Optional Class 1 Division 2 12 ...

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Page 17: ...d Connect the heat tape to an independent source of electrical power FAILURE TO ATTACH HEAT TAPE AND INSULATION TO EXPOSED INLET AND OUTLET PIPES WILL VOID THE WARRANTY 2 Set the thermostat on the enclosure heater located at the upper left corner in the enclosure to 40 70 degrees F Note Heater Fan continuously operates to recirculate air in the enclosure The heater coil will activate based on ther...

Page 18: ...ments The GFCI module is pre set from the factory to trip at 3 0A Test and reset functions are carried out automatically every 24hrs To manual test the GFCI press the test button for a min of 1 5 secs To reset a tripped GFCI cycle the power of the unit If equipped with a disconnect handle turn the handle to the OFF position then back to ON A B Test 18 ...

Page 19: ...make sure you can identify this water heater by having the model no ____________________ and serial number _____________________ Call 203 267 7890 or toll free 800 543 6163 Email info eemaxinc com Web www Eemax com Eemax Inc 400 Captain Neville Drive Waterbury CT 06705 ...

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