Viessmann Vitodens 100-W User manual

Installation Instructions
for use by heating contractor
Burner Mixture Damper Replacement, Part No. 7374 870
for Vitodens 100-W, type WB1A boilers
Safety and Installation Requirements
Please ensure that these instructions are read and understood before commencing installation. Failure to comply with the
instructions listed below can cause product/property damage, severe personal injury, and/or loss of life.
Working on the equipment
The installation, adjustment, service
and maintenance of this product must
be done by a licensed professional
heating contractor who is qualified
and experienced in the installation,
service, and maintenance of hot water
boilers. There are no user serviceable
parts on the boiler, burner or control.
Ensure main power supply to
equipment, the heating system, and all
external controls has been deactivated.
Close main gas supply valve. Take
precautions in both instances to avoid
accidental activation of power during
service work.
Ensure that the installation
literature of other applicable
components is referenced.
Enclosure Removal
Please file in Service Binder
1. Remove the screw at the top of
boiler A.
2. Press down on springs at bottom
of boiler Band remove the front
enclosure panel C.
3. Flip control console down D.
4. Shut off the secondary side of
the boiler and isolate the boiler
from the system.
Note:
The boiler is still filled with water.
5730 003 v1.1 02/2009

2
CAUTION
To avoid damage to the burner, do
not lay burner on its cylindrical
burner tube.
Failure to heed this caution may
cause damage to the burner tube,
which may lead to improper
operation.
Mixture
Damper
Location
Burner Removal
5. Disconnect electrical cables from
gas valve Eand ignition
transformer unit F.
6. Remove connection hose Dfrom
air pressure switch.
7. Loosen the fitting Con the gas
connection pipe.
8. Loosen four screws B, remove
burner and disconnect all electrical
cables from blower motor A.
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3
Burner Disassembly and Mixture Damper Replacement
9. Remove two screws 2and
remove mixture damper 3located
between burner chassis 1and
fan motor 5.
10. Remove mixture damper and
discard.
11. Install newly supplied mixture
damper. See picture below (rotate
180°).
12. Reassemble the burner in reverse
order with new burner gasket.
IMPORTANT
Ensure that mixture damper 3is
correctly positioned. See Attention
below. Check mixture damper for free
movement (opens up in the direction
of the air flow).
2 44.3 inch-pounds (5 Nm)
For tightening, use a calibrated torque
wrench.
IMPORTANT
Perform gas leak testing. Use new
gaskets, if needed.
13. Check the gas connections for
leaks.
Ensure tab of flapper is pointing downward!
5730 003 v1.1 02/2009
ATTENTION
WRONG!!CORRECT!!
1
2
3
5

4
Printed on environmentally friendly (recycled and recyclable) paper.
Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island • 02886 • USA
1-800-288-0667 • Fax [phone]
www.viessmann-us.com • [email protected]
Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario • N2V 2G5 • Canada
1-800-387-7373 • Fax. [phone]
www.viessmann.com • [email protected]
5730 003 v1.1 02/2009 Technical information subject to change without notice.
Burner Removal
14. Replace electrical cables from fan
motor A, mount burner, and
diagonally tighten 4 torque screws
B(approx. 3 ft.lbs/4 Nm using a
calibrated torque wrench).
15. Insert new gasket and tighten the
fitting Con the gas connection
pipe.
16. Insert air pressure switch
connection pipe Donto the gas
valve “OUT” connector (P2 on the
switch).
17. Replace electrical cables from gas
valve E, and ignition transformer
unit F.
18. Open gas shutoff valve and switch
on power supply.