EemaX Series Twelve Installation instructions

EemaX
“SERIES TWELVE”
ELECTRIC INSTANTANEOUS WATER HEATER
FOR EMERGENCY SAFTEY EQUIPMENT
INSTALLATION AND OWNERS MANUAL
REQUIRED MANTENANCE
WARNING
BEFOREATTEMPTING INSTALLATION OF THIS UNIT OR MAKING ANYADJUSTMENTS
TO THE UNITALWAYS 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 BUTALSO 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 BEENALTERED IN
ANY WAY WHATSOEVER. THE MANUFACTURER OF THIS WATER HEATER WILLNOT 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 CALLING.

Model Number Volts
(delta)
3 wire
Max . Output
@ 480V Amps Per phase
ED079480T12EDS 480 79kW 96
ED096480T12EFD 480 96kW 116
ED108480T12EFD 480 108kW 130
ED126480T12EFD 480 126kW 152
ED138480T12EFD 480 138kW 166
EFD: Eye Face Drench
For combination Eye/Face Drench Shower
First stage minimum activation 4 gpm (1/2 kW rating)
Second stage activation 15 gpm (full power)
MODEL NUMBERS COVERED

GENERAL
The Eemax “Series twelve” water heater is specifically designed to take in
cold or pre-heated water and heat it to temperatures suitable for emergency equipment,
With a maximum output temperature of 90°which complies with ANZI Z358.1.
To obtain optimum performance and energy savings, 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 twelve heating modules. These 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 1-1/4” NPT pipe connections and a Y strainer for the inlet side.
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.
WARNING
Failure to ground the system may result in death or serious injury.
2

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 WILLcause 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 six mounting holes of the backplate. Unit
weight is approximately 70 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: 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.
3
NOTE
ALL MOUNTING AND PLUMBING MUST BE COMPLETE BEFORE YOU PROCEED
WITH ELECTRICAL HOOK-UP. TEST THE INSTALLATION FOR LEAKS BEFORE
CONNECTING THE ELECTRICALSUPPLY.
Hazardous Locations -Nonincendive Type Installation
1) The unit is mounted in an approved NEMA4 Enclosure.
2) Non-incindive for Class I, Division 2, GroupsA, B, C&D. Temperature class: T5 (212 °F)
3)As to installation, refer to the National Electrical Code and NFPA 70. For locations C1, Div.2
refer to section 501-4 (wiring methods) and 501-10 (utilization equipment) respectively.
Note: If ignition atmosphere is <T5 class, or if other classifications are required, another method of
compliance would be “Purged and Pressurized”. This is the process of supplying an enclosure
with a protective gas at a sufficient flow and positive pressure to reduce the concentration of
any flammable gas or vapor initially present to an acceptable level. For further information, see
ANSI/NFPA496-1998, Purged and Pressurized Enclosures for Electrical Equipment.

1) The unit is supplied with NPT fittings., USE THESE; 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 connectingthe
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. (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 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
ELECTRICALSUPPLY.
7 “
Hot outlet
1-1/4” NPT
fitting
DO NOT
SOLDER
Cold inlet
1-1/4” NPT
fitting
DO NOT
SOLDER
4

ELECTRICAL HOOK-UP
WARNING
HAZARD OF ELECTRICAL SHOCK! BEFORE BEGINNING ANY WORK ON THE
INSTALLATION, MAKE SURE THE ELECTRICALSUPPLY 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 WITHANY 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 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 POWERAT 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
ONE AT A TIME FOR A MINUTE OR TWO UNTIL THE WATER FLOW IS CONTINUOUS AND
FREE FROM “GULPING”AND FROM VISIBLEAIR POCKETS.
RATINGS OF “ED” Series Twelve Electric Tankless Water Heater
Units are set for a max temperature of 90°F
THIS UNIT MUST NOT BE CONNECTED IN STAR CONFIGURATION
5
Temperature Rise (F°) GPM (gallons per minute)
Model number prefix kW Rating
Amps per
phase 4 gpm 6 gpm 15 gpm 20 gpm
ED079 79 55 67 45 36 27
ED096 96 67 82 55 44 33
ED108 108 75 92 61 49 37
ED126 126 88 108 71 57 43
ED138 138 166 117 78 63 47

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 minute.
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.
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 the technical service department.
6

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 switch on your heater is met,
for this figure refer to the front cover of this manual.
Also check that the inlet filter screen is clear from any debris.
3)WATER CONNECTIONSARE 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 5
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 MAIN BREAKER!
Repeat the steps from paragraph 4 above.
4)THERMOSTATADJUSTMENT 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.
8

REQUIRED MAINTENANCE PROCEDURE
To Be Performed by Qualified Personnel
MONTHLY CHECKS
M1) Ensure main circuit breaker is on.
M2) Open outlet valve(s) to run water thru unit. Ensure that the
minimum flow rate to switch on your heater is met, for this
figure refer to the front cover of this manual.
M3) Check outlet temperature for desired setting.
QUATERLY CHECKS
Q1) 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 thru M3 with cover removed, observe
each module for an indicator light.
Q8) Turn off circuit breaker
Q9) Install front cover, then turn on main circuit breaker.
9

REPLACEMENT PARTS DIAGRAM
HEATER CORE ASSEMBLY (PLEASE SPECIFY 480 VOLTS ON ANY ORDERS)
FOR ED079 PART# EX3491 34.91 Ohms
FOR ED096 PART# EX2880 28.8 Ohms
FOR ED108 PART# EX2560 25.6 Ohms
FOR ED126 PART# EX2194 21.94 Ohms
10
THERMOSTATIC
PCB
PART# EX100CV-480V
SLAVE PART #
EX100S-480V
TRIAC
PART# EX18
Contactor part #
EX08002-01
(480 volts)