Buderus GB312 Series Reference manual

Technical service bulletin
BIM Module Change Procedure
Bulletin Number: TBG-19 | Model: GB312 Series Boilers
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).
Figure 1
A
B
C
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 2
Figure 3
3. UnscrewscrewsNo.20(installation&maintenancemanual
page109)andremoveholdingplatetogetherwiththeoldBIM
programmingmodule(Fig.4).
Figure 4
4. DrilloutrivetwhichxesBIMmoduletometalplate(Fig.5).
Figure 5

Bulletin Number: TBG-19 | GB312 Series Boilers Technical service bulletin
Datasubjecttochangewithoutnotice|BTC431002101A|02.2010 Buderus
BoschThermotechnologyCorp.
50WentworthAve
Londonderry,NH03053
Tel:(603)552-1100
Fax:(603)584-1681
www.buderus.net
5. RemoveoldBIMmoduleandinsertnewmodule.Secure
BIMmodulewithnewrivet(includedinshipment)and
adequaterivetingtool(Fig.6).
Figure 6
6. Reassembleholdingplate(payattentiontothesmall
bendedfansupportsheet(Fig.7,pos.A)whichshouldbe
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
A
Figure 8
A
Figure 9
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).
Figure 10
A
B
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)