eemax “three module, single phase” water heaters
Contents
1. Teflon tape only TY No pipe dope Figure 1B Pipe support Outlet Isolating Ball Valve throttle open just enough to obtain adequate flow of hot water PLUMBING HOOK UP 1 The unit is supplied with 34 NPT fittings Figure 3 USE THESE DO NOT USE PIPE DOPE AND DO NOT SOLDER TO THE INLET OR OUTLET 2 Take care to ensure that the pipes are correctly aligned with the inlet and outlet bosses in order to avoid excessive stress on the heater body molding NOTE When soldering pipe joints remove heater from the wall Serious damage can occur if any soldering is done while pipes are connected to the heater When tighten the fittings make sure to secure the fitting inside the heater to make a tight connection Run water through the supply pipe to remove all debris from the pipe before connecting the heater Failure to do so could cause damage to the flow switch 3 Install isolating valves full flow ball valve type on both inlet and outlet pipes This allows unit to be isolated for maintenance purposes Fig 1B 4 When all plumbing is complete fully check the system for water leaks at all the plumbing connections If a leak is present take corrective action Fully open both inlet and outlet BALL VALVES Run all the hot water outlets fed by this heater one at a time for a minute or two until the water flow is continuous free from gulping and from all visible air pockets NPT NPT 342. FITTING 7 FITTING DO NOT SOLDER DO NOT SOLDER SOLDER DO 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 ELECTRICAL HOOK UP WARNING BEFORE BEGINNING ANY WORK ON THE ELECTRICAL INSTALLATION BE SURE THE SWITCH AT MAIN BREAKER PANEL IS OFF TO AVOID ANY DANGER OF ELECTRICAL SHOCK Three Module Single Phase heaters are manufactured to the following specifications Figure 4 MODEL TYPE OUTPUT kW VOLTAGE AMPERAGE EX230 22 5 240 3x32 AMPS EX280 28 0 240 3x39 AMPS SPECIAL Units rated of 240 V can operate at 208 V with reduced output The output will vary in accordance with the following ratios volts 208 volts 240 volts output ratio 5 1 0 This unit must have its own independent circuits using 3 SETS of UL listed 2 conductor and ground core copper wire cable of the appropriate size protected by 3 separate and independent correctly rated Double Pole Breakers 220 240 V see Figures 4 and 5 Wire entry into the unit must be made through the 4 holes provided in the flange on the backplate The live wires should be connected to the slots in the terminal block marked L1 and L2 The ground lead must be connected to the slot marked GND GROUND MUST BE BROUGHT TO THE GROUND AT THE CIRCUIT BREAKER PANEL ig Circuit Breaker Panel Figure 5 ircui
3. the 140 F setting you could now open up the outlet ball valve slightly to achieve a higher rate of flow When the indicator light is on continuously the unit is emitting full power When it is pulsing the unit is modulating the power to achieve the temperature set by means of the temperature adjustment screw THE TEMPERATURE CONTROLLING POTENTIOMETER IS A PRECISION COMPONENT ADJUST GENTLY AND DO NOT TURN BEYOND THE MIN AND MAX STOP POINTS MAXIMUM SETTING MINIMUM SETTING ALL HEATERS In order to obtain good control at single lever mixer type faucets single spout the cold water supply to the faucet should be restricted to give approximately the same flow rate of cold water to the faucet as the hot water coming from your Eemax heater The simplest method of doing this is by partially closing the cold water valve under the sink as long as this does not shut off pressure to your Eemax heater MAXIMUM TEMPERATURE RISE CHART F FLOW RATE GAL PER MIN 4 3 12 25w aa st al 38 00 65 te7 96 rel 56 TROUBLESHOOTING SYMPTOM A NO HEAT INDICATOR LIGHT OFF 1 ELECTRIC SUPPLY IS OFF Turn on the THREE main circuit breakers 2 NO OR LOW WATER FLOW Ensure that the minimum flow rate to switch on your heater is met T2T Models minimum flow rate 0 75 gallons per minute Also check that the inlet filter screen is clear from any debris This is located
4. EEMAX THREE MODULE SINGLE PHASE WATER HEATERS ELECTRIC INSTANTANEOUS WATER HEATER INSTALLATION GUIDE AND OWNERS MANUAL MODELS COVERED EX230T2T 208 240V EX280T2T 208 240 V SPECIAL V WARNING READ THE GENERAL SAFETY SECTION BEGINNING ON THE INSIDE COVER AND THEN THIS ENTIRE MANUAL BEFORE INSTALLING OR OPERATING THIS WATER HEATER IF YOU DON T FOLLOW THE SAFETY RULES THE UNIT WILL NOT OPERATE PROPERLY AND IT COULD CAUSE DEATH SERIOUS BODILY INJURY AND OR PROPERTY DAMAGE READ ALSO THE ENCLOSED WARRANTY CARD WARRANTY OF THIS WATER HEATER WILL DEPEND ON PROPER INSTALLATION AND OPERATION THE WARRANTY SHALL BE VOID IF THE DESIGN HAS BEEN ALTERED IN ANY WAY WHATSOEVER THE MANUFACTURER OF THIS HEATER WILL NOT BE LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE TO COMPLY WITH THE INSTALLATION AND OPERATING INSTRUCTIONS OUTLINED ON THE FOLLOWING PAGES THE INSTALLATION MUST CONFORM WITH THE INSTRUCTIONS IN THIS MANUAL ELECTRIC COMPANY RULES AND THE LOCAL CODES OR IN THE ABSENCE OF LOCAL CODES WITH THE LATEST EDITION OF THE NATIONAL ELECTRICAL CODE THIS PUBLICATION IS AVAILABLE FROM YOUR LOCAL GOVERNMENT OR PUBLIC LIBRARY OR ELECTRIC COMPANY OR BY WRITING UNDERWRITERS LABORATORIES 333 PFINGSTEN ROAD NORTHBROOK IL 60062 IF YOU REQUIRE ANY HELP OR HAVE ANY QUESTIONS RELATING TO THE INSTALLATION OR PERFORMANCE OF THIS HEATER PLEASE CALL OUR TECHNICAL SERVICE DEPARTMENT TOLLFREE 1 800 543 6163 HAVE THE INFORMATION LIS
5. TED BELOW BEFORE CALLING SERIAL NO MODEL NO INSTALLATION DATE 1 REV 8 08 GENERAL SAFETY The Eemax three Module Single Phase heater is specifically designed to take in cold water and heat it to temperatures suitable for normal domestic usage up to a maximum of 140 F 60 C To obtain optimum performance and energy savings the unit should be located as near as possible to the point of use Thermostatic models indicated by the letters T2T or T3 after the model number these models and only these can be fed with pre heated water and be used to boost temperature The unit is supplied with 3 4 NPT pipe connections Under no circumstances use a blow torch on pipe which is connected to the heater Serious damage to the electronic flow switch will result Carefully use Teflon tape ensuring no debris enter the heater Do not use pipe dope Also ensure that the pipes are clear of installation debris before fitting the heater THIS HEATER MUST HAVE THREE DEDICATED INDEPENDENT 208 240V CIRCUITS USING CORRECTLY RATED WIRES AND CIRCUIT BREAKERS WARNING FAILURE TO GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY WARNING IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE CAN CAUSE DEATH SERIOUS BODILY INJURY OR PROPERTY DAMAGE REFER TO THIS MANUAL FOR ASSISTANCE OR CONSULT THE LOCAL ELECTRIC UTILITY FOR FURTHER INFORMATION WARNING WATER HEATERS EQUIPPED FOR ONE VOLTAGE ONL
6. Y THIS WATER HEATER MAY BE EQUIPPED FOR ONE VOLTAGE TYPE ONLY CHECK THE RATING PLATE ON THE FRONT COVER OF UNIT FOR THE CORRECT VOLTAGE DO NOT USE THIS WATER HEATER WITH ANY OTHER VOLTAGE OTHER THAN THE ONE SHOWN ON THE MODEL RATING PLATE FAILURE TO USE THE CORRECT VOLTAGE CAN CAUSE PROBLEMS WHICH CAN RESULT IN DEATH SERIOUS BODILY INJURY OR PROPERTY DAMAGE IF YOU HAVE ANY QUESTIONS OR DOUBTS CONSULT EEMAX OR YOUR ELECTRIC COMPANY WARNING HAZARD OF ELECTRICAL SHOCK BEFORE REMOVING THE COVER OR SERVICING THE WATER HEATER MAKE SURE THE ELECTRICAL SUPPLY TO THE WATER HEATER IS TURNED OFF FAILURE TO DO THIS COULD RESULT IN DEATH SERIOUS BODILY INJURY OR PROPERTY DAMAGE MOUNTING THE UNIT 1 The unit should be mounted as close to the point of use as possible Do not install the heater above a faucet or point of use because the siphoning effect may drain the heater which can cause premature element burn out 2 This unit must only be mounted in a vertical position with the water fittings located at the bottom of the unit Mounting other than in the vertical position WILL cause element burn out and cause permanent damage to the water heater 3 The cold water inlet is on the right hand side and the hot water outlet is on the left hand side Under NO circumstances can these be reversed 4 Leave a minimum of 8 above the unit for easy replacement of the element 5 The heater should be fixed to the wall using all f
7. in the brass inlet boss 3 WATER CONNECTIONS ARE REVERSED Cold water inlet right side hot water outlet left side 4 ELEMENT BURNED OUT TURN OFF THE THREE MAIN CIRCUIT BREAKERS Using an ohmmeter test the resistance of the heating element across the two threaded termination rods on top of the element The resistance reading should be under 10 ohms If the resistance AN i is much greater than this value call Eemax for a replacement element 5 ECO TRIPPED High Limit Thermostat TURN OFF THE THREE MAIN CIRCUIT BREAKERS Reset by pushing in red button on each heater module SYMPTOM B 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 9 for temperature rise at various flow rates 2 INCORRECT POWER SUPPLY Make sure that the unit is connected to the voltage supply specified on the rating label on the the front cover of the unit and no other 3 ELEMENT BURNED OUT TURN OFF THE THREE MAIN CIRCUIT BREAKERS Repeat the steps from paragraph 4 above 4 THERMOSTAT ADJUSTMENT SCREW NOT TURNED UP Models T2T only Turn both thermostat adjustment screws clockwise in small increments until the indicator light s remains on Take care not to force the screw past it s stop position See page 9 for example 5 ECO TRIPPED High Limit Thermostat TURN OFF THE THREE MAIN CIRCUIT BREAKERS Reset by pushing in red button on each heater modu
8. le 10 EEMAX REPLACEMENT PARTS DIAGRAM 66 1 0 REPLACEMENT HEATER CORE ASSEMBLY EX770 7 5kW 240V j EX230 EX630 9 5 KW 240 V d EX280 ECO High Limit Thermostat Push to Reset CONTROL BOARDS 0 To 3 Independent circuit breakers EEMAX INC 353 Christian Street Oxford CT 06478 Tel 203 267 7890 11
9. nd is the forth heating module T2T MODELS a Switch on the power to the first unit The power indicator light should illuminate b Switch on the power to the second unit again the power indicator lights should illuminate Note These lights should pulse On and Off at first and after about 20 30 seconds it should stay fully on c Switch on the power to the third unit again the power indicator lights should illuminate Note This light should pulse On and Off at first and after about 20 30 seconds It may not Stay fully on d Use the OUTLET ball valve to gradually reduce the water flow until the power indicator light on the third unit begins to pulsate The water temperature should now be approximately 140 F e The thermostat is now set and the water temperature will always be the same when the indicator light is pulsing f Increasing water flow above the flow rate at which the thermostatic control is no longer effective will reduce the water temperature For T2T Models a lower temperature is required turn the temperature adjustment screw s counter clockwise about 1 8 of a turn See Figure Wait 15 20 seconds and check the temperature at the fixture Repeat this process until the desired temperature has been achieved For T2T models try to adjust both temperature adjustment screws by about the same amount so that the lights pulse at the same rate If you have reduced the temperature considerably from
10. our mounting holes of the backplate Unit weight is approximately 15 lbs Use an appropriate fastener for this weight For the unit to be mounted against hollow walls suggest using steel wall anchors with the correct grip range and 6 32 screw size minimum NOTE The heater should be installed below the level of all hot water outlets serviced by this heater NOTE PRESSURE AND TEMPERATURE RELIEF VALVE These units are not required by UL to have a Pressure and Temperature Relief Valve PTRV You should check with local codes to find out if one is required in your area If local codes require the use of a temperature and pressure relief valve it should be installed on the outlet hot water pipe before the outlet ball valve Figure 2 Showers and the whole house cabin or condo Lavatory MODEL EX230T2T Shower Output 22 5 kW 240 volts 17 kW 208 volts aT MODEL EX280T2T Output 28kW 240 volts 21kW 208 volts Hot outlet Cold inlet About 0 85 2 5 GPM at showering temperature Best used when operating one outlet at a time MINIMUM 87 CLEARANCE ABOVE UNIT rE MOUNTING HOLES LUG TERMINALS AT RELAYS ELECTRICAL HOOK UP 208 240 V GROUND LUGS Figure 1A MINIMUM 87 CLEARANCE ABOVE UNIT Union Threaded type Teflon tape only No pipe dope a Inlet isolating valve Union a ball valve Always leave fully Threaded type open when unit is in service
11. t Breaker Pane 3 Separate and independent correctly rated Double pole breakers 208 240 Volts DANGER FAILURE TO GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY 7 IV COMMISSIONING YOUR HEATER 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 ELSE PREMATURE FAILURE OF THE ELEMENT WILL OCCUR TO DO THIS OPEN ALL HOT WATER OUTLETS ONE AT A TIME FOR A MINUTE OR TWO UNTIL THE WATER FLOW IS CONTINUOUS AND FREE FROM GULPING AND FREE FROM VISIBLE AIR POCKETS 1 Open fully both inlet and outlet valves at the heater 2 Open any hot water outlet in the system If the outlet is a single lever mixer type turn to the hottest position Run for one minute to clear all the air from the system 3 Slowly close OUTLET ball valve until the water flow from the faucet just starts to reduce NOTE This process has two effects One any air in the system will be purged out Two the heater units will be pressurized at the supply pressure This will prevent the elements free from air pockets while energized Note Keep water flowing while carrying out the procedures outlined below Flowrate should be at 2 3 gallons per minute to ensure all 4 modules to activate GO TO APPROPRIATE SECTION FOR YOUR MODEL NOTE For the following sections the first unit is the right hand heating module and the second unit is the right center far left ha
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