Engineering Submittal Sheet

Bosch Thermotechnology Corp. reserves the right to make changes without notice due
to continuing engineering and technological advances | BTC 721008304 A | 12.2011
Bosch Thermotechnology Corporation
Londonderry, NH • Ft. Lauderdale, FL • Irvine, CA
Tel: [phone] Fax: [phone] www.bosch-climate.us
Engineering Submittal Sheet
TRONIC US3 / US6 / US7 / US9
Electric Tankless Water Heaters
Engineering Specifi cations
INSTALLATION
All aspects of installation of Water Heater Plant 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 individually
isolating shutoff valves for service and maintenance.
Unit shall be installed in close vicinity of point of use.
OPERATION
The appliance shall have a high setting with two elements
energized and an output and a low setting with one element
energized.
WARRANTY
The heating element shall carry a 5-year warranty against
leakage. All other parts and components shall carry a 1 year
warranty against defects in materials or workmanship.
Technical data
Description Unit US3 US6 US7 US9
Part number
− 7-736-500-685 7-736-500-686 7-736-500-684 7-736-500-687
Voltage supply V AC 110-120 277 240 (208) 240 (208)
Minimum circuit breaker size A 30 25 30 40
Maximum output kW 3.4 -3.0 6.0 7.2 (5.4) 9.5 (7.1)
Maximum output on low kW setting ²
)
kW − 3.0 3.6 (2.7) 4.8 (3.6)
Minimum recommended wire size AWG 10 10 10 8
Thermal effi ciency % 99 99 99 99
Water pressure range psi 10 - 150 10 - 150 10 - 150 10 - 150
Activation fl ow rate GPM 0.5 0.5 0.75 0.75
Maximum inlet water temperature ¹
)
° F ≤ 86 ≤ 86 ≤ 86 ≤ 86
Inlet / Outlet connections Inch
½” NPT ½” NPT ½” NPT ½” NPT
Weight (without water) lbs 5 5 5 5
Certifi cations
−
U
P
C
NSF/ANSI 61
®
¹
)
Do not use heater for water temperature boosting applications
²) High/Low kw settings possible within some models
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