Engineering
Submittal
Sheet
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 722008305 A | 07.2015
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.boschheatingandcooling.
TRONIC 6000C WH17 & WH27
Electric Tankless Water Heaters
1 of 5
Engineering Specifi cations
Water heater shall be a Model TRONIC 6000C WH17 or, WH27.
Installation shall consist of ___Model TRONIC 6000C WH17
electric tankless water heaters as distributed by Bosch
Thermotechnology Corp. and 97% thermal effi ciency. Supply
voltage shall be 240VAC (208VAC, 220VAC) with a maximum
output of 17.25kW.
Installation shall consist of ___Model TRONIC 6000C WH27
electric tankless water heaters as distributed by Bosch
Thermotechnology Corp. with a thermal effi ciency of 97%. Supply
voltage shall be 240VAC (208VAC, 220VAC) with a maximum
output of 26.85kW.
The tankless water heaters shall be UL listed for the US and UPC
certifi ed.
CONSTRUCTION
Water heater shall be electricity powered with compact tankless
design for whole house operation and an effi ciency rating of 97%.
Primary heat exchanger shall be made from composite material
and the elements shall be made from -sheathed copper. Unit shall
be protected by a tough sheet metal housing. Heat exchanger
shall be rated for maximum working pressure not less than 150
psig. Water heater shall be equipped with a fl ow turbine. Water
connections for inlet and outlet shall be ¾” NPT male.
The controls shall contain an external set point temperature
selector, display screen and a high temperature safety cut-out.
The controls shall not compensate for heat loss, pipe run, and
other factors affecting the outlet temperature at end use. Unit
shall be equipped with a fl ow turbine and a temperature sensor
for constant output temperature. A red light shall indicate
when the unit is powering one or more elements.
INSTALLATION
All aspects of installation of 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 individual
isolating shutoff valves for service and maintenance.
MODE OF OPERATION
The heater shall include integral factory wired operating
controls to control all operation and energy input. Control of
discharge water temperature shall be set through an internal
set point with a fi eld adjustment of 95 to 131 degrees F. Heater
shall be capable of maintaining the temperature set point +/- 3
degrees F. This shall be accomplished by switching or pulsing
the power to the electrical elements.
WARRANTY
The heating modules shall carry a 5 year limited warranty.
All other parts and components shall carry a 2 year limited
warranty against defects in materials or workmanship.
Overview and Certifi cations
®
U
P
C
LOW-LEAD
®
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 722008305 A | 07.2015
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.boschheatingandcooling.com
TRONIC 6000C WH17 & WH27
Electric Tankless Water Heaters
Technical Data
Description Unit WH17 WH27
Part number − 7736503050
7736503051
Voltage supply VAC 240 240
Amperage A 2 x 40 3 x 40
Maximum output kW 17.25 26.85
Maximum output at 220V kW 15.00 22.50
Maximum output at 208V kW 13.00 20.00
Minimum recommended wire size AWG 8 8
Thermal effi ciency % 97 97
Temperature control range ° F 95 - 131 95 - 131
Maximum inlet water temperature* ° F ≤ 86 ≤ 86
Water pressure range psi 15 - 150 15 - 150
Minimum fl ow rate GPM 0.6 0.8
Inlet / Outlet connections Inch
¾ NPT ¾ NPT
Weight (without water) lbs 20 22
Certifi cations
−
®
U
P
C
LOW-LEAD
®
* Do not use heater for water temperature boosting applications
Display Screen
The display screen is defaulted to display set-point
temperature in Imperial Units. The set-point temperature can
be adjusted with use of the external set-point temperature
selector.
For a licensed electrician, the display can be adjusted to
display fl ow rate and can be changed to Metric units. These
changes are made by a licensed electrician by making the
appropriate adjustments on the dipswitch, as shown.
Display DIP Switch
[1] Metric units °C & liters per min
[2] Display Temp
[3] American units °F & GPM
[4] Display Flow
2 of 5
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 722008305 A | 07.2015
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.boschheatingandcooling.com
TRONIC 6000C WH17 & WH27
Electric Tankless Water Heaters
3 of 5
Dimensions
15¼"
12½"
4½"
12⅝"
2½"
3½"
6⅛" 5¾"
1¾"
Cold
Water
Inlet
Hot
Water
Outlet
12⅝"
END/SIDE VIEW
Not to Scale
FRONT VIEW
Not to Scale
BOTTOM VIEW
Not to Scale
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 722008305 A | 07.2015
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.boschheatingandcooling.com
TRONIC 6000C WH17 & WH27
Electric Tankless Water Heaters
Water Heating Capacity Data
Temperature
Rise °F
Flow Rate GPM
WH17 WH27
35 2.3 3.5
45 2.3 3.5
55 2.1 3.3
65 1.8 2.8
75 1.6 2.4
90 1.3 2.0
Water Heating Capacity Curve
10 20 30 40 50 60 70 80 90
Temperature rise (°F)
8
100 110
7
6
4
3
2
1
0
5
Flow
Rate
(GPM)
WH27
WH17
4 of 5
Clearances
Description Unit Minimum clearance
Top clearance A Inch
12
Bottom clearance B Inch 6
Front clearance C Inch 12
Side clearance D Inch 0
Front View
D D
Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 722008305 A | 07.2015
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.boschheatingandcooling.com
TRONIC 6000C WH17 & WH27
Electric Tankless Water Heaters
5 of 5
Installation Example
TRONIC
WH17 or WH27
Hot Cold
Symbols
Service
valves
Sink
Standard tub fixture
Flow direction
Note: Cold water piping to fixtures not shown for clarity purposes.
Components
A Heating module
B Heating element assembly
C Heating module P.C.B’s
F Temperature sensor
G Terminal block (CANADA ONLY)
H Flow transducer
I Control PCB
J Cold water inlet
K Hot water outlet
L Display PCB
M Display DIP switch
Components Legend
D Double pole thermal cut-off (WH27)
Single pole thermal cut-off (WH17)
E 6 position terminal block (WH27)
4 position terminal block (WH17)
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1
-
2
-
3
-
4
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5
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