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THREE PHASE THERMOSTATIC

ELECTRIC INSTANTANEOUS WATER HEATER

MODELS: EX360T12, EX480T12, EX720T12, EX960T12

(208 volts only)

INSTALLATION GUIDE AND OWNERS MANUAL

WARNING

BEFORE ATTEMPTING INSTALLATION OF THIS UNIT OR MAKING ANY ADJUSTMENTS
TO THE UNIT ALWAYS BE SURE MAIN CIRCUIT BREAKER IS OFF TO PREVENT DANGER

OF SERIOUS ELECTRIC SHOCK.

MODEL :

SERIAL NO :

INSTALLATION DATE :

ELEMENT RESISTANCE:               OHMS

SWITCH ON FLOW RATE:              GPM

OPERATING TEMPERATURE
MIN:                                MAX:

Eemax Inc., 353 Christian Street, Oxford, CT 06478

1

INSTALLER/ CONSUMER RESPONSIBILITIES

PLEASE TAKE THE TIME TO READ NOT ONLY THIS MANUAL BUT ALSO THE

WARRANTY CARD ENCLOSED. WARRANTY OF THIS HEATER WILL DEPEND ON PROPER
INSTALLATION, OPERATION,  AND REQUIRED MAINTENANCE. THE WARRANTY SHALL BE
VOID IF THE DESIGN ORSTRUCTURE OF THE WATER HEATER HAS BEEN ALTERED IN 
ANY WAY WHATSOEVER. THE MANUFACTURER OF THIS WATER HEATER WILL NOT BE
LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE TO COMPLY WITH THE INSTALLATION
AND OPERATING INSTRUCTIONS OUTLINED ON THE FOLLOWING PAGES.

IF YOU REQUIRE ANY HELP OR HAVE ANY QUESTIONS RELATING TO THE

INSTALLATION OR PERFORMANCE OF THIS HEATER, PLEASE CALL OUR TECHNICAL
SERVICE DEPARTMENT TOLL-FREE:

1-800-543-6163

HAVE THE INFORMATION LISTED BELOW BEFORE BEFORE CALLING.

Summary of Contents for EX360T12

Page 1: ...ESPONSIBILITIES PLEASE TAKE THE TIME TO READ NOT ONLY THIS MANUAL BUT ALSO THE WARRANTY CARD ENCLOSED WARRANTY OF THIS HEATER WILL DEPEND ON PROPER INSTALLATION OPERATION AND REQUIRED MAINTENANCE THE WARRANTY SHALL BE VOID IF THE DESIGN ORSTRUCTURE OF THE WATER HEATER HAS BEEN ALTERED IN ANY WAY WHATSOEVER THE MANUFACTURER OF THIS WATER HEATER WILL NOT BE LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE ...

Page 2: ... clear of installation debris before fitting the heater otherwise the flow switches could jam in the on position The unit must be connected to its own individual electric circuit protected by a suitably rated three pole breaker The maximum voltage which can be applied across any heating module is 208 volts WARNING Improper installation adjustment alteration service or maintenance can cause DEATH S...

Page 3: ...ve draw off of cold water just before the unit Also do not fit an unrestricted hot water draw off point below the heater as this will tend to empty the heater by siphoning 3 NOTE ALL MOUNTING AND PLUMBING MUST BE COMPLETE BEFORE YOU PROCEED WITH ELECTRICAL HOOK UP TEST THE INSTALLATION FOR LEAKS BEFORE CONNECTING THE ELECTRICAL SUPPLY Hazardous Locations Nonincendive Type Installation 1 The unit i...

Page 4: ...3 Install isolating valves full flow ball valve type on both inlet and outlet pipes This allows unit to be isolated for maintenance purposes see Fig 1 4 When all plumbing is complete fully check the system for water leaks at all plumbing connections If leak is present take corrective action Fully open both inlet and outlet ball valves Run all hot water outlets fed by this heater one at a time for ...

Page 5: ...es three live and one ground of the appropriate rating protected by the correctly rated three pole breaker WARNING FAILURE TO GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY IMPORTANT BEFORE SWITCHING ON THE POWER AT THE MAIN CIRCUIT BREAKER PANEL MAKE SURE THAT THE HOT WATER CIRCUIT IS FREE OF AIR POCKETS OR PREMATURE FAILURE OF THE ELEMENT WILL OCCUR TO DO THIS OPEN ALL HOT WATER OUTLETS...

Page 6: ...point water temperature may not be hot 5 Using the OUTLET BALL VALVE slowly reduce water flow until desired temperature is achieved at hot water outlet NOTE The water temperature is regulated by the flow through the heater The lower the flow the higher the temperature and vice versa MINIMUM SETTING MAXIMUM SETTING THE TEMPERATURE CONTROLLING POTENTIOMETER IS A PRECISION COMPONENT ADJUST GENTLY AND...

Page 7: ...ure rise at various rates of flow see chart 8 It is possible that drawing off cold water at comparatively high rates of flow elsewhere in the building at the same time that the heater is working could cause premature element failure Care should be taken not to starve the unit of cold water To prevent this from happening open fully the main valve on the cold supply to the building and throttle back...

Page 8: ...ont cover of this manual for the correct value If the resistance is much greater than the correct value call your supplier for a replacement element SYMPTOM NO HEAT OR LOW TEMPERATURE WITH INDICATOR LIGHT ON 1 WATER FLOW TOO HIGH Reduce the water flow by using an outlet ball valve See page 5 for temperature rise at various flow rates 2 INCORRECT POWER SUPPLY Make sure that the unit is connected to...

Page 9: ...1 Turn off main circuit breaker Q2 Remove front cover from heater Q3 Inspection of heater bodies and distribution manifold for water leaks Q4 Inspection of fuses 50 amp each Q5 Inspection of 12 heater elements see page 10 for element ohms Q5 Inspection of coarse inlet filter screen is clear from any debris Q6 Turn on main circuit breaker note unit has live electrical Q7 Carefully perform steps M1 ...

Page 10: ...SPECIFY 208 VOLTS ON ANY ORDERS FOR EX360 T12 PART EX1440 14 4 Ohms FOR EX480 T12 PART EX1080 10 8 Ohms FOR EX720 T12 PART EX720 7 2 Ohms FOR EX960 T12 PART EX540 5 4 Ohms 10 THERMOSTATIC PCB PART EX100F cont TRIAC PART EX18 Contactor part EX256 208 volts ...

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