Eemax EX2412T, EX610, EX3012T, EX480, EX3512T Service manual

®

“Thermostatic”

ELECTRIC INSTANTANEOUS WATER HEATER

INSTALLATION GUIDE AND OWNERS MANUAL

WARNING

BEFORE ATTEMPTING INSTALLATION OF THIS UNIT OR MAKING ANY

ADJUSTMENTS TO THE UNIT, ALWAYS BE SURE CIRCUIT BREAKER IS OFF

TO PREVENT DANGER OF SERIOUS ELECTRIC SHOCK.

FAILURE TO GROUND THE SYSTEM MAY RESULT IN SERIOUS INJURY OR DEATH

INSTALLER/ CONSUMER RESPONSIBILITIES

READ THIS MANUAL CAREFULLY BEFORE ATTEMPTING TO INSTALL OR

OPERATE THIS WATER HEATER. IF THE SAFETY RULES ARE NOT FOLLOWED,

THE UNIT WILL NOT OPERATE PROPERLY AND IT COULD CAUSE DEATH,

SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE.

WARRANTY OF THIS WATERHEATER WILL DEPEND

ON PROPER INSTALLATION AND OPERATION. THE WARRANTY

WILL 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.

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

THE INSTALLATION MUST CONFORM WITH THE INSTRUCTIONS IN THIS

MANUAL AND LOCAL CODES, OR INTHE ABSENCE OF

LOCAL CODES, WITH THE LATEST EDITION OF THE

NATIONAL ELECTRICAL CODE. THIS PUBLICATION IS AVAILABLE FROM

YOUR LOCAL GOVERNMENT, ELECTRIC CO., PUBLIC LIBRARY, OR BY

WRITING UNDERWRITERS LABORATORIES, 333 PFINGSTEN RD.,

NORTHBROOK, IL. 60062

TEL:[phone], FAX: [phone], e-mail: [e-mail]

IF YOU REQUIRE 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 NO.___________SERIAL NO.___________INSTALLATION DATE_____

COMPRESSION

NUT

PART# EX17

TRIAC

PART # EX 18

CONTROL BOARD

EX100/240 for 240v, 208v

EX100/277 for 277V

ELEMENT CARTRIDGE

HEATER MODEL/ORDER REF. CARTRIDGE REF #

EX2412T EX610
EX3012T EX480
EX3512T EX410
EX 55T EX 1050

EX 65T EX 890

EX 75T EX 770

EX 95T EX 630

EX 8208T EX 520

EX 60T EX 1280

EX 80T EX 960

EX 90T EX 850

EX 100T EX 760

Replacement Parts for “Thermostatic” Units

INSTANT COMFORT…ENDLESS SAVINGS

COMPRESSION

SLEEVE

PART # EX16

TEMP
ADJ
KNOB

RELAY

GROUND

WIRE

GENERAL

The Eemax “Thermostatic” heater is specifically designed

to take in cold or preheated water and heat it to temperatures suitable

for the normal domestic usage up to a maximum of 1400 F. To obtain

optimum performance and energy savings, the unit should be located as

close as possible to the point of use. The unit is supplied with compression

rings and nuts suitable for direct coupling to 1/2” copper or plastic piping.
Do not use additional screwed fittings or pipe dope. Doing so will void the

warranty. DO NOT SOLDER PIPES WHILE THE UNIT IS INSTALLED

(serious damage to the electronic flow switch will result).

This heater must have its own independent circuit, using

a correctly rated breaker and

wires suitable for at least 75 oC operation.

Failure to ground this system may result in death or serious injury.

1) 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 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
element.

5) The heater should be fixed to the wall using the four mounting holes at
each corner of the backplate.

NOTE: The heater should be installed below the level of all hot water
outlets serviced by this heater.

NOTE: PRESSURE RELIEF DEVICE
This unit is not required by UL to have a Pressure and Temperature
safety 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 temperature and pressure relief valve it
should be installed on the outlet hot water pipe before the outlet ball valve.

TROUBLE SHOOTING

SYMPTOM: NO HEAT INDICATOR LIGHT OFF

1) ELECTRIC SUPPLY IS OFF
Turn on the main breaker.

2) Check the ECO (red re-set button) if tripped please call tech support

3) NO OR LOW WATER FLOW
Ensure that the minimum flow rate to switch on your heater is met.
“EX100T, 95T, 90T, 8208T” Models minimum flow rate = 0.75 gpm
“EX80T, 75T, 65T” Models minimum flow rate = 0.6 gpm
“EX60T, 55T” 2412T,3012T, 3512T Models
minimum flow rate = 0.5 gpm
Also check that the inlet filter screen is clear from any debris. This is
located in the brass inlet boss.

4) WATER CONNECTIONS ARE REVERSED
Cold water inlet = right side, hot water outlet = left side.

5) ELEMENT BURNED OUT
TURN OFF THE breaker!
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 is much greater than this value, call Eemax 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 3
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 breaker!
Repeat the steps from paragraph 4 above.