EemaX SP2412 User manual

1
INSTALLATION GUIDE AND OWNER’S
MANUAL
“SINGLE POINT”, “FLOW CONTROLLED” and “THERMOSTATIC”
ELECTRIC INSTANTANEOUS WATER HEATERS
BEFORE ATTEMPTING ANY INSTALLATION, MODIFICATION OR SERVICE OF THIS
HEATER, MAKE SURE THE ELECTRICAL POWER IS DISCONNECTED.
Read and understand these instructions thoroughly before attempting the installation or service of this
water heater. Failure to follow these instructions can result in serious injury, death and/or property
damage. The warranty of this water heater will depend upon the proper installation according to these
instructions. Some heaters come supplied with separate faucet aerators. If supplied, the aerator must
be installed in the faucet for optimum performance. This heater must be used to heat water only and
be in a location where it is not subject to freezing temperatures. The manufacturer is not liable for any
damages resulting from improper installation or misuse.
This installation must conform to the latest requirements of the National Electrical Code and all
applicable state and local codes. This information is available through your local authorities. You must
understand these requirements before beginning this installation.
This unit is not required by UL 499 to have a Temperature and Pressure relief valve (T&P). You should
check with local codes to find out if one is required. If it is, it must be installed in the outlet hot water
pipe between the heater and the isolation valve.
IMPORTANT SAFETY INSTRUCTIONS
When using this electrical equipment, basic safety precautions should always be followed, including the
following:
READ AND FOLLOW ALL INSTRUCTIONS
A green terminal (or a wire connector marked “G”, “GR, “Ground”, or “GROUNDING”) is provided within
the control box. To reduce the risk of electric shock, connect this terminal or connector to the
grounding terminal of the electric service or supply panel with a continuous copper wire in accordance
with your local electrical code.

2
(Canadian Installations Only) Connect only to a circuit protected by a Class A
ground fault circuit interrupter. Attention: Brancher uniquement à un circuit protégé par un disjoncteur
de fuite de terre de Classe A.
(Canadian Installations Only) Do not install in a bath enclosure or shower stall or
connect to a salt-regenerated water softener or a water supply of salt water. Attention: Ne pas installer
dans une baignoire ou une cabine de douche et ne pas brancher à un adoucisseur d’eau régénéré avec
du sel ou à un approvisionnement en eau salée.
(Canadian Installations Only) Use copper conductors only. Use bonding conductor in accordance with
the Canadian Electrical Code Part I. Utilisez dez conducteurs en cuive uniquement. Utilisez des
conducteurs de mize à la masse conformement au Code Canadien de L’Électricité, Partie I.
SAVE THESE INSTRUCTIONS
GENERAL
The Eemax “Single Point”or “SP”, “ Flow Controlled”or “EX” and “Thermostatic” or “EX-T” heaters will
provide optimum performance and energy savings when located under the sink and as close as possible
to the point of hot water use. For best performance the heater should be BELOW the point of use.
Failure to do so may void the warranty. Contact your Eemax representative for further information.
“Single Point” heaters and “Flow Controlled” heaters are to be plumbed to a cold water source ONLY
and heat it with a temperature rise at flow rates as shown on the table on page 10.
“Thermostatic” heaters are the only heaters of the three outlined in this manual which have
thermostatic control. “Thermostatic” heaters accept cold or preheated water and heat it to
temperatures suitable for normal domestic usage up to a maximum of 140 degrees F. With the “S”
option, they can be used as a temperature booster for sanitation applications sometimes required for
dishwashers in commercial kitchens. Units built with the “ML” option are factory-set to a maximum
temperature of 110°f and are recommended for hand washing applications. The “ML” option is an
excellent choice for supplying hot water to sensor-type or metering faucets.

3
1) MOUNTING THE UNIT TO THE WALL
1) The heater should be mounted “under the sink” as close to the point of use as possible. “Single
Point” will have the brass fittings on the top pointing “up”. “Flow Controlled” and “Thermostatic” will
have the fittings on the bottom pointing “down”.
2) The fittings must be pointed in
the vertical direction and be at
least 16 inches below the level of
the hot water faucet. Make sure
to leave a minimum of 8 inches
service clearance at the end
OPPOSITE the fittings.
3) Remove the cover and fasten to
the wall using the four mounting
holes at each corner of the back
plate. Make sure the “UP” arrow
on the circuit board is facing “UP”.
Replace the cover.
This heater must be installed in a location where it is not subject
to freezing temperatures.

4
2) PLUMBING HOOK-UP
The heater is supplied with brass compression fittings that are compatible with either copper or plastic
pipe. “Single Point” has 3/8” fittings. Both “Flow Controlled” and “Thermostatic” units have ½” fittings.
Make sure these fittings are used for this installation. Contact your Eemax representative for further
information.
NEVER SUBSTITUTE THREADED PIPE FITTINGS USING PIPE DOPE OR TEFLON TAPE
AND NEVER SOLDER ANY PIPE CONNECTIONS WHILE ATTACHED TO THIS HEATER BECAUSE DAMAGE
TO THE HEATER WILL RESULT. DOING THIS WILL VOID THE WARRANTY.
Eemax strongly recommends that the heater be supplied directly from the main cold water line when
possible. This helps to avoid a potential water flow interruption to the heater which could lead to a
failure of the heating element.
For optimum performance, we recommend the use of isolation valves (full flow ball type) on the inlet
and outlet pipes.
1) The heater’s cold water INLET is on the
“RIGHT” and the hot water OUTLET is on the
“LEFT”. Install full flow ball valves to the inlet
and outlet pipes and run water through the inlet
pipe into a bucket to purge it of any debris.
Close the inlet ball valve.
2) Make sure the inlet filter screen is present in
the inlet fitting and the inlet and outlet pipes
are correctly aligned with the heater
connections to minimize stress on the heater.

5
3) Remove the cover. Connect the pre-assembled
inlet and outlet pipes to the heater and fully open
the inlet and outlet ball valves. Check for water
leaks. If a leak is at a compression fitting, slowly
tighten the compression nut until it stops. Replace
the cover.
4) Open the hot water faucet and run the water a
minute or two until the flow is continuous and free
of air pockets. Close the faucet and install the
aerator (if supplied). Failure to install aerator (if
supplied) will result in lower-than-expected heater
performance.

6
3) ELECTRICAL HOOK-UP
BEFORE BEGINNING ANY WORK ON THIS INSTALLATION, BE SURE THAT THE
ELECTRICAL BREAKER IS “OFF” AND THAT ALL MOUNTING AND PLUMBING WORK HAS BEEN
COMPLETED PER THESE INSTRUCTIONS.
This heater must have its own independent circuit using insulated, UL listed, 2 wire cable (2 wire plus
ground) of the appropriate size suitable for up to 75 degree C and protected by the correctly rated
circuit breaker. Refer to the chart on page 7.
FAILURE TO GROUND THE SYSTEM MAY RESULT IN SERIOUS INJURY, DEATH
AND/OR PROPERTY DAMAGE.
1) Power cable entry to the heater should be
made through one of the “knock-out” holes
located on the back plate or top/bottom ends of
the unit. Use the appropriate strain relief fitting.
2) The power leads are to be secured to the L1
and L2 or L and N connectors on the terminal
block or relay. The ground lead is to be secured
to the GND connector on the block or the green
ground wire with the wire nut.

7
3) Leave the breaker in the “OFF” position. Proceed
to the next section:
COMMISSIONING THE HEATER
ELECTRICAL SPECIFICATIONS:
"SINGLE
POINT"
"FLOW
CONTROLLED"
"THERMOSTATIC"
WIRE
SIZE
MODEL
MODEL
MODEL
VOLTS
kW
AMPS
AWG
SP2412
n/a
n/a
120
2.4
20.0
10
n/a
EX2412
EX2412T
120
2.4
20.0
12
SP3012
EX3012
EX3012T
120
3.0
25.0
10
SP3512
EX3512
EX3512T
120
3.5
29.2
10
SP3208
EX3208
EX3208T
208
3.0
14.4
14
SP4208
EX4208
EX4208T
208
4.1
19.7
12
SP8208
EX8208
EX8208T
208
8.3
40.0
8
SP35
EX35
EX35T
240*
3.5
14.6
14
SP48
EX48
EX48T
240*
4.8
20.0
10
SP55
EX55
EX55T
240*
5.5
22.9
10
SP65
EX65
EX65T
240*
6.5
27.0
10
SP75
EX75
EX75T
240*
7.5
32.0
8
SP95
EX95
EX95T
240*
9.5
40.0
8
n/a
n/a
EX012240T
240*
11.5
48.0
6
SP3277
EX3277
EX3277T
277
3.0
10.8
14
SP4277
EX4277
EX4277T
277
4.1
14.8
14
SP60
EX60
EX60T
277
6.0
22.0
10
SP80
EX80
EX80T
277
8.0
29.0
8
SP90
EX90
EX90T
277
9.0
33.0
8
SP100
EX100
EX100T
277
10.0
36.0
8
* 240V units can be used on 208V with 25% reduced temperature output.

8
4) COMMISSIONING THE HEATER
BEFORE SWITCHING THE ELECTRICAL BREAKER “ON”, MAKE SURE THE INLET AND
OUTLET BALL VALVES ARE FULLY OPEN AND WATER IS FLOWING THROUGH THE HOT WATER FAUCET
FOR A MINUTE OR TWO UNTIL THE FLOW IS CONTINUOUS AND FREE FROM AIR POCKETS. DO NOT
SWITCH THE BREAKER “ON” IF THERE IS A POSSIBILITY THE WATER IN THE HEATER IS FROZEN.
1) Make sure water is flowing through the faucet.
2) Switch “ON” the electric power supply at the breaker.
3) The power indicator light on the circuit board should
come “ON” after a delay of a few seconds.
4) Check the performance of the flow switch by opening
and closing the OUTLET BALL VALVE a few times. Keep
the INLET BALL VALVE fully “OPEN”. The power
indicator light should be “ON” ONLY when water is
flowing through the heater. Return the outlet valve to
the fully “OPEN” position.

9
5) SETTING THE TEMPERATURE
At this point, the water temperature may not be
very hot. Using the OUTLET BALL VALVE, slowly
reduce water flow until the desired temperature is
achieved. Always keep the INLET BALL VALVE fully
“OPEN”. NEVER RESTRICT THE WATER FLOW
USING THE INLET VALVE. The temperature is
proportional to the flow through the heater; the
lower the flow, the higher the temperature and
vice versa.
If water flow is TOO HOT follow the instructions below according to what model Eemax heater you
have:”Single Point/Flow Controlled” or “Thermostatic”.
“Single Point” and “Flow Controlled” heaters have
a circuit board that looks like this:
“Thermostatic” heaters have a circuit board that
looks like this:
These heaters have no
controls on the circuit
board to turn the
temperature of the
water DOWN.
Volume of water through these heaters is the way
maximum temperature is controlled. If the outlet
valve is adjusted to less than wide-open, open it
up to maximum flow. You may have to change the
faucet aerator to a larger size (0.5 GPM to 1 GPM,
for example) to reduce temperature.
The thin blue temperature adjustment shaft in the
upper left corner controls the maximum
temperature of the water. If the water is too hot:
turn the temperature adjustment shaft counter-
clockwise about 1/8 of a turn and wait 15-20
seconds. If the temperature remains too hot,
repeat this step until the desired temperature is
achieved.
Congratulations !
Your Eemax tankless electric water heater is fully installed and ready for use !

10
TEMPERATURE RISE AT SPECIFIED FLOW RATE, DEGREES F:
"SINGLE
"FLOW
POINT"
CONTROLLED"
"THERMOSTATIC"
MODEL
MODEL
MODEL
0.5
GPM
1.0
GPM
1.5
GPM
2.0
GPM
2.5
GPM
SP2412
EX2412
EX2412T
33
16
11
8
6
SP3012
EX3012
EX3012T
41
20
14
10
8
SP3512
EX3512
EX3512T
48
24
16
12
9
SP3208
EX3208
EX3208T
41
20
14
10
8
SP4208
EX4208
EX4208T
56
28
19
14
11
SP8208
EX8208
EX8208T
*
57
38
28
14
SP35
EX35
EX35T
48
24
16
12
9
SP48
EX48
EX48T
65
32
21
16
13
SP55
EX55
EX55T
75
38
25
19
15
SP65
EX65
EX65T
*
44
30
22
18
SP75
EX75
EX75T
*
51
34
26
20
SP95
EX95
EX95T
*
65
43
32
26
n/a
n/a
EX012240T
*
73
52
39
31
SP3277
EX3277
EX3277T
41
21
14
10
8
SP4277
EX4277
EX4277T
56
28
19
14
11
SP60
EX60
EX60T
*
41
27
20
15
SP80
EX80
EX80T
*
55
36
27
22
SP90
EX90
EX90T
*
61
41
31
26
SP100
EX100
EX100T
*
68
46
34
27
* Not enough water flow to activate the heater.

11
BASIC TROUBLESHOOTING
SYMPTOM: NO HEAT AND THE POWER INDICATOR LIGHT ON THE CIRCUITBOARD IS “OFF”.
1) Verify the heater is mounted to the wall correctly. “Single Point” has the brass fittings pointed
“UP”. “Flow Controlled” and “Thermostatic” have the fittings pointed “DOWN”.
2) Verify it is plumbed correctly. The cold water INLET is on the “RIGHT” and the hot water OUTLET
is on the “LEFT”.
3) No electrical power to the heater. Switch the breaker “ON”.
4) Incorrect power supply. Make sure the heater is connected to the voltage specified on the rating
label on the front cover.
5) Not enough water flow through the heater to turn the heating element “ON”. Check the inlet and
outlet ball valves to make sure they are open. Also check the inlet filter screen inside the inlet
fitting to make sure it is not plugged (see page 4). Clean or replace the aerator at the faucet.
6) Still NO HEAT? Contact Eemax. Call 203-267-7890 or 800-543-6163.
SYMPTOM: NO HEAT, LOW OR INCONSISTENT TEMPERATURE WITH INDICATOR LIGHT “ON”.
1) Water flow is too high. Reduce the water flow by slowly closing the OUTLET ball valve.
2) Incorrect power supply. Make sure the heater is connected to the voltage supply specified on the
rating label on the front cover.
3) Electrical heating element is burned out. Turn off electrical power by switching the breaker “OFF”.
Use an ohmmeter to test the resistance across the two threaded terminals at the end of the
element. The resistance varies, depending on the model of the heater, but should be less than
30 ohms. If it is much greater or fluctuating, contact Eemax for a replacement element cartridge.
If you need any assistance from our Technical Service Department, make sure you can identify this water
heater by having the model no:____________________ and serial number:_____________________.
Call 203-267-7890 or toll free: 800-543-6163.

12
PERIODIC MAINTENANCE
This heater is designed for many years of care free use. In order to maintain consistent water flow, it
may be necessary to periodically clean the faucet aerator or the filter screen located in the brass inlet
fitting at the heater.
PART NUMBERS FOR FITTINGS, AERATORS AND AERATOR ADAPTORS
COMPRESSION FITTINGS:
AERATORS:
3/8" NUT
EX68B
0.5 GPM
EX0061-0.5AER
3/8" SLEEVE
EX68C
1.0 GPM
EX0061-1.0AER
5/8" NUT for ½” pipe
EX17
5/8" SLEEVE for ½” pipe
EX16
AERATOR ADAPTORS:
MALE 13/16"-27 X MALE 55/64"-27
EX61-339
FEMALE 3/4"-27 X MALE 55/64"-27
EX61-341
FEMALE 13/16"-24 X MALE 55/64"-27
EX61-349
MALE 15/16"-27 X MALE 55/64"-27
EX61-336
MALE 11/16"-27 X MALE 55/64"-27
EX60-344
MALE M24X1/FEMALE M22X1 X MALE 55/64"-27
EX61-387
If you need any assistance from our Technical Service Department, make sure you can identify this water
heater by having the model no:____________________ and serial number:_____________________.
Call 203-267-7890 or toll free: 800-543-6163.
Eemax Inc., 400 Captain Neville Drive, Waterbury, CT 06705
Tel: [phone], Fax: [phone], email: [email protected]

13
REPAIR PARTS FOR “SINGLE POINT” AND “FLOW CONTROLLED” UNITS
“SINGLE POINT”
“FLOW
CONTROLLED”
ELEMENT
CONTROL
EMERGENCY
MODEL
MODEL
CARTRIDGE
BOARD
RELAY
CUT OFF
SP2412
EX2412
EX610
EX0183DL-30
EX250B
EX278A
SP3012
EX3012
EX480
EX0183DL-30
EX250B
EX278A
SP3512
EX3512
EX410
EX0183DL-30
EX250B
EX278A
SP3208
EX3208
EX1440
EX0183DL-30
EX254B
EX278A
SP4208
EX4208
EX1050
EX0183DL-30
EX254B
EX278A
SP8208
EX8208
EX520
EX0183DL-40
EX255B
EX278A
SP35
EX35
EX1650
EX0183DL-30
EX254
EX278A
SP48
EX48
EX1200
EX0183DL-30
EX254
EX278A
SP55
EX55
EX1050
EX0183DL-30
EX254
EX278A
SP65
EX65
EX890
EX0183DL-30
EX254
EX278A
SP75
EX75
EX770
EX0183DL-40
EX255B
EX278A
SP95
EX95
EX630
EX0183DL-40
EX255B
EX278A
SP3277
EX3277
EX260
EX0183DL-30
EX251B
EX278A
SP4277
EX4277
EX1870
EX0183DL-30
EX251B
EX278A
SP60
EX60
EX1280
EX0183DL-30
EX251B
EX278A
SP80
EX80
EX960
EX0183DL-30
EX251B
EX278A
SP90
EX90
EX850
EX0183DL-40
EX253B
EX278A
SP100
EX100
EX760
EX0183DL-40
EX253B
EX278A
CONTROL BOARD
EMERGENCY CUT OFF
RELAY
HEATING CHAMBER
(not available as a repair part)
ELEMENT CARTRIDGE (pictured
below) INSTALLS INSIDE
HEATING CHAMBER

14
REPAIR PARTS FOR “THERMOSTATIC” UNITS
EMERGENCY CUT OFF
CONTROL BOARD
RELAY
HEATING CHAMBER
(not available as a repair part)
ELEMENT CARTRIDGE (pictured below)
INSTALLS INSIDE HEATING CHAMBER
ELEMENT
CONTROL
EMERGENCY
MODEL
CARTRIDGE *
BOARD **
RELAY
CUT OFF ***
EX2412T
EX610
EX284-120
EX259B
EX278A
EX3012T
EX480
EX284-120
EX259B
EX278A
EX3512T
EX410
EX284-120
EX259B
EX278A
EX3208T
EX1440
EX284AB-240
EX255B
EX278A
EX4208T
EX1050
EX284AB-240
EX255B
EX278A
EX8208T
EX520
EX284AB-240
EX255B
EX278A
EX35T
EX1650
EX284AB-240
EX255B
EX278A
EX48T
EX1200
EX284AB-240
EX255B
EX278A
EX55T
EX1050
EX284AB-240
EX255B
EX278A
EX65T
EX890
EX284AB-240
EX255B
EX278A
EX75T
EX770
EX284AB-240
EX255B
EX278A
EX95T
EX630
EX284AB-240
EX255B
EX278A
EX012240T
EX500 PRT
EX284AB-240
EX1050-1
EX278A
EX3277T
EX260
EX284AB-277
EX253B
EX278A
EX4277T
EX1870
EX284AB-277
EX253B
EX278A
EX60T
EX1280
EX284AB-277
EX253B
EX278A
EX80T
EX960
EX284AB-277
EX253B
EX278A
EX90T
EX850
EX284AB-277
EX253B
EX278A
EX100T
EX760
EX284AB-277
EX253B
EX278A
* If heater has suffix “DI” order element with suffix “SS”
** If heater has the suffix “ML” order circuit board with suffix “ML”
*** If heater has suffix “EE” or “FS” temp below 90°f, use p/n EX278E
*** If heater has suffix “S” or “FS” temp above 140°f, use p/n EX278D

15
Eemax Inc., 400 Captain Neville Drive, Waterbury, CT 06705
Tel: [phone], Fax: [phone], email: [email protected]
Eemax CE Product Plan

16 EX07200-13 Rev D
New Model No.
Former Model
Number
Phase
Modules
Volts
Watts
SP002120CE
SP2412
1
1
120
2.4kW
SP003120CE
SP3012
1
1
120
3.0kW
SP004120CE
SP3512
1
1
120
3.5kW
SP004240CE
SP35
1
1
240
3.5kW
SP005240CE
SP48
1
1
240
4.8kW
SP006240CE
SP55
1
1
240
5.5kW
SP007240CE
SP65
1
1
240
6.5kW
SP008240CE
SP75
1
1
240
7.5kW
SP010240CE
SP95
1
1
240
9.5kW
SP003220CE
SP282*
1
1
220
2.8kW
SP004220CE
SP332*
1
1
220
3.3kW
SP006220CE
SP552*
1
1
220
5.5kW
SP007220CE
SP662*
1
1
220
6.6kW
SP009220CE
SP882*
1
1
220
8.8kW
EX004240CE
EX35
1
1
240
3.5kW
EX005240CE
EX48
1
1
240
4.8kW
EX006240CE
EX55
1
1
240
5.5kW
EX007240CE
EX65
1
1
240
6.5kW
EX008240CE
EX75
1
1
240
7.5kW
EX010240CE
EX95
1
1
240
9.5kW
EX003220CE
EX282*
1
1
220
2.8kW
EX004220CE
EX332*
1
1
220
3.3kW
EX006220CE
EX552*
1
1
220
5.5kW
EX007220CE
EX662*
1
1
220
6.6kW
EX009220CE
EX882*
1
1
220
8.8kW
EM1015
Same*
1
1
230
1.50kW
EM1024
Same*
1
1
230
2.30kW
EM1637
Same*
1
1
230
3.68kW
EM1637SP
Same*
1
1
230
3.68kW
EM2046
Same*
1
1
230
4.60kW
EM2557
Same*
1
1
230
5.75kW
EM2557SP
Same*
1
1
230
5.75kW
EM3273
Same*
1
1
230
7.36kW
EM4092
Same*
1
1
230
9.20kW
New Model No.
Former
Model
Number
Phase
Modules
kW @
240v
kW @
220v
EC004240CE
EX332T
1
1
3.9
3.3
EC006240CE
EX55T
1
1
5.5
4.6
EC007240CE
EX65T
1
1
6.5
5.5
EC008240CE
EX75T
1
1
7.5
6.3
EC010240CE
EX95T
1
1
9.5
8.0
For repair parts, see pages 13 and 14.
*Contact Eemax directly.
PRESSURE
175 kPa min
1034 kPa max