EX09001-48 REV 8
1
INSTALLATION 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., 400 Captain Neville Dr., Waterbury, CT 06705
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 OR STRUCTURE 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:
203-267-7890 or 800-543-6163
HAVE THE INFORMATION LISTED BELOW BEFORE CALLING.
‘’SERIES THREE”
480 VOLT 3 PHASE DELTA
ELECTRIC INSTANTANEOUS WATER HEATER
EX09001-48 REV 8
2
Model
Number
Volts
(delta)
3 wire
Max
. Output
@ 480V
Amps
Per phase
ED020480T2T, T3,
T
3 EE
480
20kW
24
ED024480T2T, T3, T3 EE
480
24kW
29
ED032480T2T, T3, T3 EE
480
32kW
35.5
T2T OPTIONS:
S: Sanitation (Temperature - 180 degrees)
ML: Multi-lav (0.3 gpm activation, temperature set at 110 degrees)
FS: Factory Set (Temperature: Customer specified from Ambient
to180 degrees)
MODEL NUMBERS COVERED
Unless otherwise noted, all above units have the following flow rate and temperature
specifications as factory standard settings:
FLOW RATES
T2T: Turn-on 0.7 GPM / Maximum 4 GPM
T3 EE: Turn-on 0.95 GPM / Maximum 6 GPM
T3: Turn-on 1.8 GPM / Maximum 6 GPM
TEMPERATURE
T2T and T3: Standard preset 140 degrees F
T3 EE: Standard preset 90 degrees F
EX09001-48 REV 8
3
GENERAL
To obtain optimum performance and energy savings from your Eemax heater, the unit should be
located as near as possible to the point of use. The unit must only be installed in a vertical
position with the inlet and outlet at the bottom.
The power is activated by individual electronic flow switches located in each of the three heating
modules. These modules will be damaged by excessive heat; do not solder 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 three pole breaker. The maximum voltage which can be
applied across any heating module is 480 volts.
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.
The unit is supplied with 1/2” compression water fittings.
Under no circumstances use a propane or plumber’s torch on pipe which is connected to
the heater, as serious damage to the electronic flow switch will result. Do not use pipe
dope.
WARNING
Failure to ground the system may result in death or serious injury.
EX09001-48 REV 8
4
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 all 4 mounting holes of the back plate. 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.
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: 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.
EX09001-48 REV 8
5
1) The unit is supplied with ½ “ compression fittings. DO NOT USE PIPE DOPE AND DO
NOT SOLDER PIPE 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 manifold.
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.
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.
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 or two
until the water flow is continuous, free from ”gulping” and from all visible air pockets.
PLUMBING HOOK-UP
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.
7 “
Hot outlet
1/2” Compression
fitting
DO NOT
SOLDER
Cold inlet
1/2” Compression
fitting
DO NOT
SOLDER
EX09001-48 REV 8
6
ELECTRICAL HOOK-UP
WARNING
HAZARD OF ELECTRICAL SHOCK! BEFORE BEGINNING ANY WORK ON THE
INSTALLATION, MAKE SURE THE ELECTRICAL SUPPLY TO THE HEATER IS TURNED
“OFF”. FAILURE TO DO THIS COULD RESULT IN DEATH, SERIOUS BODILY INJURY,
OR PROPERTY DAMAGE.
WARNING
WATER HEATERS EQUIPPED FOR ONE VOLTAGE ONLY: CHECK THE RATING PLATE
ON THE FRONT OF THE UNIT. DO NOT USE THIS WATER HEATER WITH ANY VOLTAGE
OTHER THAN THE ONE SHOWN ON THE MODEL RATING PLATE. FAILURE TO DO SO
CAN RESULT IN DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. IF YOU
HAVE ANY QUESTIONS OR DOUBTS CONSULT YOUR ELECTRIC COMPANY.
This heater must have its own independent circuit using four wires; three live and one earth 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
RATINGS OF “ED” Series Three Electric Tankless Water Heater
THIS UNIT MUST NOT BE CONNECTED IN STAR CONFIGURATION
Temperature Rise (F°) GPM
(gallons per minute)
Model number
prefix kW Rating
Amps per phase
2 gpm 3 gpm 4 gpm
T3 and T3 EE
Only
5 gpm
T3 and T3 EE Only
6 gpm
ED020 20 24 68 46 34 27 23
ED024 24 29 82 55 41 33 27
ED032 32 35.5 110 73 55 43 36
EX09001-48 REV 8
7
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 premature failure of the heating element will occur.
To do this open all hot water fixtures one at a time for several minutes until the water flow
is continuous and free from “gulping” and from visible air pockets.
1) With inlet and outlet BALL VALVES fully open, turn on a hot water outlet.
2) Run for 3 minutes.
3) Switch on electric supply at circuit breaker panel.
4) The power indicator lights should now come on.
NOTE: At this point water temperature may not be hot. “EE” units are preset to deliver
tepid water only.
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.
6) If water does not achieve desired temperature, please call technical services.
EX09001-48 REV 8
8
TROUBLESHOOTING
SYMPTOM: NO HEAT - INDICATOR LIGHT OFF
1) ELECTRIC SUPPLY IS OFF
Turn on the main circuit breaker.
2) NO OR LOW WATER FLOW
Ensure that the minimum flow rate to turn on your heater is met, for this figure
refer to page 2 of this manual.
Also check that the inlet filter screen is clear from any debris.
3) WATER CONNECTIONS ARE REVERSED
Cold water inlet = right side, hot water outlet = left side.
4) ELEMENT BURNED OUT
TURN OFF THE MAIN BREAKER!
Using an ohmmeter test the resistance of the heating element across the two
threaded termination rods on top of the element.
See the front 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 6 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 front cover of the unit and no other.
3) ELEMENT BURNED OUT
TURN OFF THE MAIN BREAKER!
Repeat the steps from paragraph 4 above.
4 )THERMOSTAT ADJUSTMENT SCREW NOT TURNED UP
Turn the thermostat adjustment screw clockwise in small increments until the
indicator light remains on. Take care not to force the screw past it’s stop
position.
EX09001-48 REV 8
9
REPLACEMENT PARTS DIAGRAM
HEATER CORE ASSEMBLY (PLEASE SPECIFY 480 VOLTS ON ANY ORDERS)
FOR ED020 PART# EX3454
FOR ED024 PART# EX2880
FOR ED032 PART# EX2194
THERMOSTATIC
PCB
PART# EX100CV-480V
(1 required)
SLAVE PART #
EX100S-480V
(2 required)
TRIAC
PART# EX18
Contactor part #
EX08002-01
(480 volts)
L1
