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MOUNTING THE UNIT

1) The unit should be mounted as close to the point of use as possible.

2) This unit must only be mounted in the 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.

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 elements.

5) The heater should be fixed to the wall using screws in the four mounting holes at each corner

of the backplate.

6) The unit should be installed in the plumbing system in such a way that there is no tendency

for the unit to be starved of water: for example: by an excessive 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. 

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.

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Summary of Contents for EX180TDI

Page 1: ... EX320TDI EX240TDI EX180TDI 480 277 Volts only INSTALLATION GUIDE AND OWNERS MANUAL E X ema TM PLEASE TAKE THE TIME TO READ NOT ONLY THIS MANUAL BUT ALSO THE WARRANTY CARD ENCLOSED WARRANTY OF THIS WATER HEATER WILL DEPEND ON CORRECT INSTALLATION AND OPERATION THE WARRANTY SHALL BE VOID IF THE DESIGN OR STRUCTURE OF THE WATER HEATER HAS BEEN ALTERED IN ANY WAY WHATSOEVER THE MANUFACTURER OF THIS W...

Page 2: ...any pipes that are in contact with the heater Also ensure pipes are 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 four pole breaker The maximum voltage which can be applied across any heating module is 277 volts WARNING Improper installat...

Page 3: ... the unit for easy replacement of the elements 5 The heater should be fixed to the wall using screws in the four mounting holes at each corner of the backplate 6 The unit should be installed in the plumbing system in such a way that there is no tendency for the unit to be starved of water for example by an excessive draw off of cold water just before the unit Also do not fit an unrestricted hot wa...

Page 4: ... 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 a minute ...

Page 5: ...ive neutral and one ground of the appropriate rating protected by the correctly rated three pole breaker DANGER 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 ON...

Page 6: ...nt 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 DO...

Page 7: ...BE ON WHEN WATER IS FLOWING THROUGH THE UNIT For expected temperature 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 t...

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: ...UST BE GROUNDED This heater is only suitable for 4 wire 3 phase connection with a maximum of 277 volts across each element REPLACEMENT PARTS DIAGRAM THERMOSTATIC PCB PART EX100 DI HEATER CORE ASSEMBLY FOR EX180 T3 DI PART EX1280 DI FOR EX240 T3 DI PART EX960 DI FOR EX320 T3 DI PART EX720 DI TRIAC PART EX18 9 ...

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