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Technical Service Bulletin:
Polypropylene Heating Canister Replacement
Models: Bosch Tronic 5000C/6000C (WH27 Model Only) Electric Tankless Water Heater
Please read this entire document prior to proceeding with any work.
WARNING:
This bulletin is intended to provide technical guidance
to a professional who is qualifi ed to work on 240V
electrical equipment. If you are not qualifi ed to work on
such equipment, please obtain the services of such a
professional.
DANGER: HAZARDOUS VOLTAGE
The electrical supply to the water heater MUST be shutoff
and isolated prior to commencing work!
NOTICE: PROPERTY DAMAGE
The water supply to the water heater must be shut off and
residual water drained prior to commencing work.
These directions assume that the product is installed in a location that
provides the installer with suffi cient access to work. If that is not the case,
it may be necessary to uninstall the water heater completely prior to
commencing work.
Part Numbers
Description
Left Heating Canister Assembly
Right Heating Canister Assembly
Table 1
Data subject to change without notice | Printed in the USA | BTC 722002312 A | 08.2021
Replacing The Right-Hand Polypropylene Canister
1.
Figure 1
2.
Part Number
7738007199
Figure 2
7738007198
3.
Remove the two Phillips screws that secure the brass outlet water connector
to the water heater's chassis (Fig.1).
Unscrew and remove the brass outlet water connector from the left black
polypropylene canister's outlet pipe (Fig.2).
Remove the two Phillips screws and washers that secure the brass inlet water
connector to the water heater's chassis (Fig.3).
Bosch Thermotechnology Corp.
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Summary of Contents for Bosch Tronic 5000C
- Page 1 Technical Service Bulletin: Polypropylene Heating Canister Replacement Models: Bosch Tronic 5000C/6000C (WH27 Model Only) Electric Tankless Water Heater Replacing The Right-Hand Polypropylene Canister Please read this entire document prior to proceeding with any work. Remove the two Phillips screws that secure the brass outlet water connector to the water heater’s chassis (Fig.1).
- Page 2 2 | Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin Remove the two screws and washers that secure the thermal cutout switch to the right brass heating element assembly (Fig.6). Figure 3 Firmly hold the clear fl ow transducer in place, and separate the brass water inlet connector from it by gently pulling it down through the water heater’s...
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Page 3: Technical Service Bulletin
Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin Figure 8 Figure 11 Remove the three screws and washers that secure the TRIAC circuit boards to the top of the right brass heating element assembly (Fig.9). 12. Remove the clear fl ow transducer by pulling it down from the polypropylene canister pipe, and remove the black temperature probe by removing two screws and pulling the component out of the black pipe (Fig.12). - Page 4 4 | Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin 14. Separate the two black canisters from each other by rotating at the joint to 17. Using the fi ve M4 fl ange nuts that were removed in Step 13, secure the disengage the connection, and then pulling them apart (Fig.14).
- Page 5 Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin Figure 22 23. Reconnect the short pink wire and the short black wire to the dual TRIAC circuit board (Fig.23). Figure 19 20. Heat sink paste was supplied with the new black polypropylene canister, apply it to the brass element assembly cap at the three locations outlined below (Fig.20).
- Page 6 6 | Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin 25. Use the two screws and washers that were removed in Step 6 to secure the thermal cut out switch back on top of the right brass heating element assembly, ensuring that ground wire is reconnected correctly (Fig.25).
- Page 7 Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin Replacing The Left-Hand Polypropylene Canister Separate the brass inlet water connection from the clear fl ow transducer by gently pulling it down through the water heater’s chassis (Fig.33). Be aware Remove the two Phillips screws that secure the brass outlet water connector that an o-ring that is located at the bottom of the fl...
- Page 8 8 | Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin Disconnect the short gray wire from the single TRIAC circuit board that is mounted to the top of the left brass heating element assembly (Fig.36). Figure 38 10. Remove the TRIAC circuit boards and bracket from the top of the left brass heating element assembly (Fig.39).
- Page 9 Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin 12. Separate the two black canisters from each other by rotating at the joint to 15. Using the fi ve M4 fl ange nuts that were removed in Step 11, secure the disengage the connection, and then pulling them apart (Fig.41).
- Page 10 10 | Tronic 5000C/6000C Polypropylene Heating Canister Replacement Technical Service Bulletin 17. Place the TRIAC circuit boards back on top of the brass element assembly, ensuring that the correct wires pass through the correct slots (Fig.46). Figure 48 20. Reconnect the short gray wire back to the single TRIAC circuit board (Fig. 49).
- Page 11 27. Run the hot water for a few minutes to ensure correct operation. If you have any questions regarding the information provided in this document, please contact the Bosch Technical Support Department by phone at 1-800-283- 3787, or via email at tankless.techsupport@us.bosch.com...