2 | Table of contents Table of contents Explanation of symbols and safety instructions 1 Explanation of symbols and safety instructions ..2 Key to symbols 1.1 Key to symbols ......2 1.2 IMPORTANT SAFETY INSTRUCTIONS .
The heater is not designed to accept inlet water temperatures above 86° F. The water heater is not designed for preheated water or recirculation applications. Contact Bosch Thermotechnology Corp. before specifying or installing the appliance in any other application.
4 | General information General information Disclaimer 2.1.1 Approval number Commonwealth of Massachusetts In the Commonwealth of Massachusetts a licensed plumber and electrician must perform the installation. Technical identification code Table 2 [EI] Electronic Instantaneous [17/27] Maximum output (kW) [E/M] Electronic / mechanical temperature control Wall hung Indoor...
General information | 7 Wiring diagram DANGER: Risk of electric shock! ▶ Always switch off the electricity supply to the unit before any intervention in the heater. Fig. 3 Internal wiring schematic for single phase WH17 unit. Tronic 6000C 6 720 646 951 (2015/04)
8 | General information Fig. 4 Internal wiring schematic for single phase WH27 unit. Function • Each heater module is protected by an electro-mechanical thermal cut-out. This cut-out will only trip in exceptional How the water heater works: circumstances. • The Tronic 6000C heats water continuously as it flows Contact Technical Support 800-798-8161 for further through the 2 heater modules.
Regulations | 9 Technical specifications Technical characteristics Units WH17 WH27 Voltage supply 2 X 240VAC (Canada 240VAC) 3 X 240VAC (Canada 240VAC) Amperage 2 X 40A (Canada 1 x 80A) 3 X 40A (Canada 1 x 120A) Maximum output 17.25kW 26.85kW Temperature control range 95 °F to 131 °F...
CIRCUIT BREAKERS ARE OFF BEFORE by a qualified person in accordance with PERFORMING ANY WORK TO THE these instructions. HEATER. ▶ Bosch Thermotechnology Corp. is not responsible for improperly installed appliances. WARNING: ▶ Indoor installation only, where it will NOT be exposed to freezing.
Installation | 11 4.2.2 Recommended minimum clearances for servicing ▶ Drill the holes and secure the heater using the four wood screws supplied. Should it be necessary to service the Tronic 6000C, observe the following clearances. These are not required clearances, but would facilitate any service work.
If water quality exceeds one or more of the values specified • Strip back the insulation on the power wires about ½ inch. below, Bosch recommends consulting a local water Connect the live wires to the terminals marked “L1” and treatment professional for water softening/conditioning “L2.”...
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Installation | 13 The WH17 requires two independent 240V AC circuits protected by two separate and independent double pole breakers (as shown) rated at 40A each. Fig. 7 WH17 terminal block connection (U.S.A. only) The WH27 requires three independent 240V AC circuits protected by three separate and independent double pole breakers (as shown) rated at 40A each.
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14 | Installation Canada Wiring - auxiliary terminal block and connections ▶ Connect the red wires from the left hand terminal of the new block to the L1 terminals in the unit. (There are two red Fitting the auxiliary terminal block (see diagram below). wires required in the WH17 and three in the WH27).
Installation | 15 Starting up ▶ For a licensed electrician, the unit has capability of displaying the flow rate on the front cover display. To do 4.6.1 Checking for leaks and purging air this, shut the circuit breakers off and remove the cover. ▶...
16 | Operation instructions For example, calculations for desired outlet temperature of Operation instructions 125F and supply voltage of 240VAC. Please look at Table 5 for derates of various supply voltages: Before using the water heater • For the WH17 unit, using the inlet valve, ensure the flow rate does not exceed 1.7 gallons/minute.
Maintenance | 17 Maintenance Draining the heater Due to the shape of the heat exchangers and connecting pipe, it is extremely difficult to get all of the water out of the heater. Follow the procedure below to best minimize the chance of freeze damage: ▶...
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18 | Maintenance Using an ohm meter to check for premature element failure On WH17 model, there is no middle element Fig. 13 Heating elements Meter probes Ohm Readings Outer to Outer 10.5 ± 0.6 Ohms Middle to Middle 11.7 ± 0.8 Ohms Inner to Inner 15.1 ±...
If the flow transducer is not spinning, remove and flush flow transducer, noting the Do's and Dont's in section 6 Maintenance. See the technical support section of www.bosch-climate.us for more detailed instruction on removing the flow transducer. No electricity at the heater or one Have a licensed electrician verify proper wiring and adequate voltage on the terminal block inside the water heater.
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20 | Troubleshooting Cold water only – Neon light off Premature element failure Have a licensed electrician Shut off power to the unit and remove cover. Use an ohm meter to verify correct resistance on each element in Section 6 Maintenance. If readings are different than listed specifications on ...
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Troubleshooting | 21 Water Temperature too Hot Temperature dial set too high Turn the temperature knob located on the front of the water heater counterclockwise for cooler temperatures. There are restrictions in the Obstructions in the water path can restrict the flow of water through the heater causing plumbing overheating.
8-738-701-729-0 Outlet 8-738-701-729-0 Table 16 For further information ask your local dealer. FOR SERVICE AND INSTALLATION QUESTIONS CALL: Tel: 800-798-8161 Fax: 603-965-7581 Bosch Thermotechnology Corporation Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Phone 800-798-8161 Fax 603-965-7581 www.boschheatingandcooling.com techsupport@bosch-climate.us...