Siemens AGU2.522 Series Mounting Instructions page 19

Step 14
Step 15
Building Technologies Division
Industry Sector
Warning!
Risk of personal injury or substantial damage to property!
Ensure the extra PCB is correctly fitted (see figure Fitting the extra PCB).
Carefully place the extra PCB in the housing of the LMU74...while making certain
that the holes are located above the studs.
The 3 pins must point upward!
Warning!
Risk of personal injury or substantial damage to property!
If not correctly located, the extra PCB can damage the housing of the LMU74...
Also, in that case, the extra PCB is not detected when checking the boiler's functions.
Consequence: Malfunctions might not be detected for some time.
Figure 16: Fitting the extra PCB
Replace the LMU74... vertically from above
Ensure that no lateral force is exerted on the 3 pins
Figure 17: Replacement of LMU74...
Mounting Instructions AGU2.522...
Step-by-step mounting instructions
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CC1J7215en
11.05.2011