Buderus GB312 Series Technical Service Bulletin

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

Buderus GB312 Series Specifications

General

Fuel Type	Natural Gas, Propane
Efficiency	Up to 95%
Ignition Type	Electronic
Type	Condensing
Weight	Varies by model
Dimensions	Varies by model
Temperature Range	30°C - 85°C