Page 1
TRONIC ES2.5, ES4, ES8
2 ½”
5 ”
3
8
Point-of-Use Electric
Mini-Tank Water Heaters
ES2.5-ES4 Dimensions
Engineering
Submittal
Sheet
ES8 Dimensions
”1
”¾
3
1
¾ NPT MALE
”½6
13 ¾”
3¾”
11. 4”
IN
M
OFF
AL
E
ID
2½”
MAX
3½”
½ NPT male
Models ES8 (Vertical installation)
”1
2½”
”6.71
6¼”
10 ¾”
13 ½”
9”
3½”
4SE5.2SE
14 ½”
8½”
4½”
17.6”
14 ½”
8½”
1 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 723008301 A | 12.2013
4½”
Models ES8 (Horizontal installation)
”6.7
1
Tel: 1-800-798-8161 Fax: 1-603-965-7581 www.bosch-climate.us
17.6”
F
F
O
MAX
IN
M
ID
E
A
L
E
L
A
M
T
PN¾”
”4.
11
”
3
1”
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
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TRONIC ES2.5, ES4, ES8
Point-of-Use Electric Mini-Tank Water Heaters
Engineering Specifi cations
Water heater shall be a Model TRONIC ES2.5, ES4 or, ES8
Installation shall consist of ___Model TRONIC ES2.5 electric minitank water heaters as distributed by Bosch Thermotechnology
Corp. and 98% thermal effi ciency. Supply voltage shall be 110 -
120VAC with a heating capacity of 1440 Watts.
Installation shall consist of ___Model TRONIC ES4 electric minitank water heaters as distributed by Bosch Thermotechnology
Corp. and 98% thermal effi ciency. Supply voltage shall be 110 -
120VAC with a heating capacity of 1440 Watts.
Installation shall consist of ___Model TRONIC ES8 electric minitank water heaters as distributed by Bosch Thermotechnology
Corp. and 98% thermal effi ciency. Supply voltage shall be 110 -
120VAC with a heating capacity of 1440 Watts.
The electric mini-tank water heaters shall be UL listed for the US
and Canada and UPC certifi ed.
CONSTRUCTION
Water heater shall be electrically powered with compact minitank design for point-of-use operation and an effi ciency rating
of 98%. Tank shall be glass-lined and insulated for thermal
retention. Unit shall be protected by a tough plastic housing.
Tank shall be rated for maximum working pressure not less than
150 psig. Water heater shall be equipped with a pressure relief
valve and a magnesium anode rod for protection against tank
corrosion. Water connections for inlet and outlet shall be ½” NPT
male for ES2.5 and ES4. Water connections for inlet and outlet
shall be ¾” NPT male for ES8.
The controls shall be a wired thermostat with temperature
selector and a high temperature safety cut-out. A red light shall
indicate when the unit is powering the heating element.
INSTALLATION
All aspects of installation of electric mini-tank water heater
shall be in strict accordance with manufacturer’s instructions.
Materials shall conform to all manufacturer’s recommendations
including electrical connections and wiring.
Water heater piping shall be fi eld constructed of materials as
specifi ed. Water heater shall be installed with water shutoff
valves for service and maintenance.
MODE OF OPERATION
The heater shall include integral factory wired thermostat to
control all operation and energy input. Control of outlet water
temperature shall be set through an internal set point with
a fi eld adjustment of 65 to 145 degrees F. Heater shall be
capable of maintaining the temperature set point +/- 3 degrees
F by supplying power to the 1440 Watt heating element.
WARRANTY
The inner tank shall carry a 8 year warranty. All other parts and
components shall carry a 1 year warranty against defects in
materials or workmanship.
2 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 723008301 A | 12.2013
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
Tel: 1-800-798-8161 Fax: 1-603-965-7581 www.bosch-climate.us
Page 3
TRONIC ES2.5, ES4, ES8
Point-of-Use Electric Mini-Tank Water Heaters
Technical Data
Description Unit ES8 ES4 ES2.5
Part number − 7736500902
Thermal Effi ciency % 98 98 98
Volts VAC 110 - 120 110 - 120 110 - 120
Amps Ω 12 12 12
Wire Type − Hard Wired Plug-In Plug-In
Tank Volume GAL 7.1 4 2.7
Heating Capacity Watts 1440 1440 1440
Recovery Rate @ 90°F Rise GPH 6.8 6.8 6.8
Temperature Range ° F 65 - 145 65 - 145 65 - 145
Max Operating Pressure psi 150 150 150
Weight lbs 29.5 17.3 15.5
Water Fittings ° F ¾” Male NPT ½" Male NPT ½” Male NPT
Relieve Valve − Included Installed Installed
Certifi cations
−
7736500901 7736500900
NSF/ANSI 61
U
P
C
®
Installation Example 1 - Booster Application
Cold
Instant
hot water
to faucet
Hot
F
OF
M
A
X
IN
M
L
A
E
ID
Long pipe run from hot water source to faucet
Front view
Water
Heater
Hot
Hot Cold
3 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 723008301 A | 12.2013
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
Tel: 1-800-798-8161 Fax: 1-603-965-7581 www.bosch-climate.us
Page 4
TRONIC ES2.5, ES4, ES8
Point-of-Use Electric Mini-Tank Water Heaters
Installation Example 2 - Point-Of-Use Application
Hot
F
F
O
M
A
X
IN
M
L
A
E
ID
Cold
Front view
Installation Example 3 Domestic Hot Water Recirculation Application
Hot
Sensor
Cold
4 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 723008301 A | 12.2013
Hot
F
F
O
M
A
X
IN
M
L
A
E
D
I
Cold
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
Tel: 1-800-798-8161 Fax: 1-603-965-7581 www.bosch-climate.us
Page 5
TRONIC ES2.5, ES4, ES8
Point-of-Use Electric Mini-Tank Water Heaters
ES2.5 & ES4 Components
1
6
5
ES8 Components
5
8
2
Components Legend
3
1 Temperature & pressure relief valve, ¾ NPT male
2 Cold water inlet ½ NPT male
MAX
F
OF
ID
E
IN
A
M
L
4
3 Thermostat
4 Temperature & pressure relief valve discharge line to drain
5 ¾ NPT female tapping for relief valve
6 Hot water outlet ½ NPT male
1
Components Legend
6
F
F
O
MAX
IN
M
ID
E
A
L
3
4
1 Temperature & pressure relief valve, ¾ NPT male
2 Cold water inlet ¾ NPT male
3 Thermostat
4 Temperature & pressure relief valve discharge line to drain
5 ¾ NPT female tapping for relief valve
6 Hot water outlet ¾ NPT male
7
7 ¾ NPT male plug
8 ¾ NPT female tapping for tap
2
5 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 723008301 A | 12.2013
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
Tel: 1-800-798-8161 Fax: 1-603-965-7581 www.bosch-climate.us
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