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Bulletin Number: TBG-19 | Model: GB312 Series Boilers
Technical service bulletin
BIM Module Change Procedure
Tools Needed
•
Drill
•
Riveting tool
•
Phillips head screwdriver
•
30T Torx screwdriver or angle torx
•
BIM Module Change Procedure
1. Disconnect ignition transformer by unplugging the ignition
cables (Fig. 1, pos. A) and the power supply cable (Fig. 1,
pos.B). Loosen two torx screws and remove transformer
(Fig. 1, pos. C).
B
2. Disconnect grounding cable under cable cover of SAFe control
(Fig. 2). Press both plastic clamps of SAFe control cover on
backside of metal holding plate (Fig. 3) and pull complete
SAFe control loose from holding plate (pay attention to wiring
of control).
Figure 1
C
A
Figure 2
3. Unscrew screws No. 20 (installation & maintenance manual
page 109) and remove holding plate together with the old BIM
programming module (Fig. 4).
4. Drill out rivet which fixes BIM module to metal plate (Fig. 5).
Figure 3
Figure 4
Figure 5
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Summary of Contents for Buderus GB312 Series
- Page 1 Bulletin Number: TBG-19 | Model: GB312 Series Boilers Technical service bulletin BIM Module Change Procedure Tools Needed Figure 3 • Drill • Riveting tool • Phillips head screwdriver • 30T Torx screwdriver or angle torx • BIM Module Change Procedure 1. Disconnect ignition transformer by unplugging the ignition cables (Fig. 1, pos. A) and the power supply cable (Fig. 1, pos.B). Loosen two torx screws and remove transformer (Fig. 1, pos. C). Figure 1 3. Unscrew screws No. 20 (installation & maintenance manual page 109) and remove holding plate together with the old BIM programming module (Fig. 4).
- Page 2 Bulletin Number: TBG-19 | GB312 Series Boilers Technical service bulletin 5. Remove old BIM module and insert new module. Secure Figure 9 BIM module with new rivet (included in shipment) and adequate riveting tool (Fig. 6). Figure 6 7. Reassemble SAFe control by reconnecting the grounding cable (Fig. 2) and attaching the SAFe control over the new BIM module on the holding plate. SAFe cover Plastic latches (Fig. 10, pos. A) must snap into the holding plate mounts (Fig. 10, pos. B). 6. Reassemble holding plate (pay attention to the small bended fan support sheet (Fig. 7, pos. A) which should be Figure 10 located on the metallic fan motor mount (Fig. 8, pos. A; see also page 109). Fasten screws 20 (IM page 20; see also Fig. 9). Figure 7 8. Reinstall transformer and secure with two torx screws (Fig. 1, pos. C). 9. Reconnect the ignition transformer by plugging in the connection / ignition cables (Fig. 1) Figure 8 Bosch Thermotechnology Corp.
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