Siemens AGU2.522 Series User manual

CC1J7215en
11.05.2011 Building Technologies Division
Industry Sector
Extra printed circuit board AGU2.522...
for boiler management units LMU74...
Mounting Instructions
The extra printed circuit board (extra PCB) prevents premature failure of the LMU74... caused by loss of
capacitance of a capacitor.
The AGU2.522 ... and this Mounting Instructions are intended for use by OEMs which integrate the extra PCB
in their products!

2/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
HVAC Products Contents 11.05.2011

3/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Contents 11.05.2011
Contents
1Typographical conventions..............................................................................4
2Summary.........................................................................................................5
2.1 Target group of users ......................................................................................5
2.2 Supplementary documentation........................................................................5
3Safety notes.....................................................................................................6
3.1 Product liability ................................................................................................6
3.2 Mounting notes................................................................................................6
3.3 Standards and certificates...............................................................................7
3.4 Environmental compatibility.............................................................................7
4Technical data .................................................................................................8
5Dimensions......................................................................................................9
6Step-by-step mounting instructions...............................................................12
7List of figures.................................................................................................21

4/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Typographical conventions 11.05.2011
1 Typographical conventions
These Mounting Instructions contain information which must be observed to ensure
your personal safety and to prevent damage to equipment and property. The instruc-
tions are highlighted by warning triangles and arrows and are presented as follows, de-
pending on the hazard level:
Warning means that death, severe personal injury or substantial
damage to property can occur if adequate precautionary
measures are not taken.
ÖNote draws your attention to other information contained in
User Documentation, chapters or sections.
Only qualified personnel are allowed to put the extra PCB into operation. Qualified
personnel in the context of the safety-related notes contained in this Mounting Instruc-
tion are persons who are authorized to commission, ground and tag devices, systems
and electrical circuits in compliance with established safety practices and standards.
Note the following:
The extra PCB may only be used on applications described in the technical documenta-
tion and only in connection with components approved or recommended by Siemens.
The product can only function correctly and safely if shipped, stored, set up and in-
stalled correctly, and operated and maintained as specified.
Qualified personnel
Correct use

5/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Summary 11.05.2011
2 Summary
The AGU2.522… is an extra PCB used to prevent premature failure of the LMU74...
caused by loss of capacitance of a capacitor.
The extra PCB provides the following basic functions:
•Additional capacitors to compensate for potential loss of capacitance of a capacitor
•Resistor for limiting the current
•Pins to facilitate mounting and to establish electrical contact with no need for plug-
ging, screwing or soldering
•Housing to ensure protection and mechanical strength
2.1 Target group of users
•Heating engineers
2.2 Supplementary documentation
Environmental Declaration AGU2.522... ……..........................................................E7215
Environmental Declaration LMU74... / LMU75... …….............................................E7495
Extended User Manual OEM (setting lists)……........................................................I7495
Extended User Manual OEM (setting lists) Sitherm Pro…….................................I7495.1
Data Sheet LMU7................................................................................................... N7495
Basic Documentation LMU7…….............................................................................P7495
Product Range Overview LMU7…..........................................................................Q7495
User Manual LMU7…….......................................................................................... U7495
Installation Instructions released by the respective boiler manufacturer
Use
Features

6/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Safety notes 11.05.2011
3 Safety notes
To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
Warning!
Do not interfere with or modify the product!
Siemens will not assume liability for damage resulting from unauthorized interference!
3.1 Product liability
•All activities (mounting, installation, service work, etc.) must be performed by quali-
fied personnel
•Before performing any work in the connection area, disconnect the product from
mains supply (all-polar disconnection). Ensure that the plant cannot be inadver-
tently switched on again and that it is indeed dead. If not disconnected, there is a
risk of electric shock
•Ensure protection against electric shock by providing adequate protection for the
connection terminals
•Fall or shock can adversely affect the safety functions. Such products must not be
put into operation, even if they do not exhibit any damage
•After any kind of activity (mounting, installation, service work, etc.), check to ensure
that wiring is in an orderly state and that all safety functions are performed correctly
•Do not touch the 3 pins since they can cause injury
•To ensure ESD, wear an ESD wrist strap
•Do not install the extra PCB in boilers equipped with LMU75...
Siemens will not assume liability for damage resulting from unauthorized inter-
ference!
3.2 Mounting notes
Ensure the relevant national safety regulations are complied with.

7/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Safety notes 11.05.2011
3.3 Standards and certificates
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity)
- Directive for gas-fired appliances
- Low-voltage directive
- Immunity
- Emissions
- Electrical safety (chapters 12.2 and 20)
2004/108/EG
90/396/EWG
2006/95/EG
EN 61000-6-1
EN 61000-6-3
EN 60730-1
EN 60730-2-5
ISO 9001: 2010
Cert. 00739 ISO 14001: 2010 Cert. 38233
•DIN EN 60335-1
•WEEED / ROHS (Directive for Electronic Scrap / Restriction of Hazardous Sub-
stances)
3.4 Environmental compatibility
The product contains electrical and electronic components and must not be disposed of
together with domestic waste.
Local and currently valid legislation must be complied with.
Standards
Disposal

8/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Technical data 11.05.2011
4 Technical data
Degree of protection IP00 to DIN EN 60529:2000 (IP code)
IP40 (to be ensured through mounting
inside the boiler)
Safety class Parts of safety class 0
Degree of pollution 2 to DIN EN 60730
Packaging Nonreturnable, each package containing
a AGU2.522...
Dimensions 146.8 mm x 73.8 mm x 8.3 mm
Storage DIN EN 60721-3-1
Climatic conditions Class 1K2
Mechanical conditions Class 1M2
Temperature range -20...60 °C
Humidity <90% r.h. (noncondensing)
Transport DIN EN 60721-3-2
Climatic conditions Class 2K2
Mechanical conditions Class 2M2
Temperature range -20...60 °C
Humidity <90% r.h. (noncondensing)
Operation DIN EN 60721-3-3
Climatic conditions Class 3K3
Mechanical conditions Class 3M2
Temperature range 0...60 °C
Humidity <85% r.h. (noncondensing)
Vibrations EN 298 / DIN EN 60068-2
Warning!
Condensation, formation of ice and ingress of water are not permitted!
General product data
Environmental conditions

9/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Dimensions 11.05.2011
5 Dimensions
Dimensions in mm
Plastic support AGU2.522... with extra PCB
Dimensions in mm
7215m05/0511
Figure 1: Plastic support AGU2.522... with extra PCB

10/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Dimensions 11.05.2011
Extra PCB
Dimensions in mm
7215m03e/0511
Zero point
Figure 2: Extra PCB

11/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Dimensions 11.05.2011
Extra PCB assembled
Dimensions in mm
7215m04e/0511
Solder fillet hei
g
ht max. 1.5 mm
The resistor must rest
on the extra PCB!
Figure 3: Extra PCB assembled

12/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
6 Step-by-step mounting instructions
Warning!
Risk of personal injury or substantial damage to property!
Follow the step-by-step mounting instructions.
Warning!
Protective ESD measure
To ensure ESD, wear an ESD wrist strap.
Ö
Note!
Further information
Refer to Installation Instructions released by the boiler supplier (e.g. WGB15-38C).
¾Check to ensure the boiler is equipped with an LMU74...
¾Disconnect the boiler from power. If the plant is not switched off, there is a risk of
electric shock
¾Remove the boiler’s front cover
Figure 4: Removal of boiler’s front cover
Step 1
Step 2
Step 3

13/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
¾Fold down the control section
Figure 5: Control section folded down
¾Remove cover from the control section
Figure 6: Cover from control section removed
¾Put on an ESD wrist strap
Figure 7: ESD wrist strap
Step 4
Step 5
Step 6

14/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
¾Use a clip to connect the ESD wrist strap to a boiler component with good electrical
conductance and earth potential
Figure 8: Connection of ESD wrist strap to the boiler
¾Put on the ESD wrist strap, ensuring contact with your skin
¾Disconnect all cables from the LMU74...
¾Remove the fuse
Figure 9: Disconnection of cables and removal of fuse
Step 7
Step 8

15/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
¾Release the 5 snap-fasteners
¾Remove housing from the LMU74...
Figure 10: Removal of housing
¾Undo and remove the 7 fixing screws of the LMU74...
1
2
4
5
67
3
Figure 11: 7 fixing screws
Step 9
Step 10

16/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
Warning!
Protective ESD measure and protection against electric shock
When removing the motherboard, always hold it by the transformer.
Never touch the motherboard itself.
¾Remove motherboard from the housing
Figure 12: Removal of motherboard
Figure 13: Never touch the motherboard itself!
Step 11

17/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
Warning!
Risk of personal injury or substantial damage to property!
Keep motherboard in a safe place.
Motherboards that fell down must not be used again.
¾Put motherboard on plastic foam suited for ESD or store it in an ESD bag
Figure 14: Motherboard placed on plastic foam suited for ESD or stored in an ESD bag
Step 12

18/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
Warning!
Risk of personal injury or substantial damage to property!
Do not touch the 3 pins since they can cause injury.
Ensure that the 3 pins do not get damaged. Damaged pins will not be detected when
checking the boiler’s functions.
Consequence: Malfunctions might not be detected for some time.
¾Take an extra PCBs from the package
Figure 15: Package with extra PCB
Step 13

19/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
Warning!
Risk of personal injury or substantial damage to property!
Ensure the extra PCB is correctly fitted (see figure Fitting the extra PCB).
¾Carefully 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
¾Replace the LMU74... vertically from above
¾Ensure that no lateral force is exerted on the 3 pins
Figure 17: Replacement of LMU74...
Step 14
Step 15

20/21
Building Technologies Division Mounting Instructions AGU2.522... CC1J7215en
Industry Sector Step-by-step mounting instructions 11.05.2011
Reassembly:
¾Secure the LMU74... with the 7 screws
¾Replace the housing of the LMU74...
Housing must audibly click
¾Reestablish and check all cable connections
¾Take off the ESD wrist strap
¾Replace the control section’s cover
¾Fold up the control section
¾Replace the boiler’s front cover
¾Make the safety checks
¾Put the boiler into operation
Step 16