Viessmann 7826 987, 7826 988 Installation Instructions Manual

Installation Instructions

for use by heating contractor

Replacement of Control Console

for Vitodens 100-WB1A

, Part No. 7826 987, 7826 988

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.

Please file in Service Binder

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.

Remove front cover panel and expose 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.

It is not permissible to perform service
work on any component parts ensuring
safe operation of the heating system.
When replacing parts, use original
Viessmann or Viessmann approved
replacement parts.

Ensure that theVitodens 100
Service Instructions are
referenced.

C

A

1. Remove the screw at the top of
boiler .

2. Press down on springs at bottom
of boiler and remove the front
enclosure panel .

3. Flip control console down .

D

7826 988 II CA 03/2009

B

Removing the control unit

1. Flip control unit down and out

towards you. The control unit is held
in place with a spring loaded clip A.

A

2. Slide unit to the left to remove.

IMPORTANT

The control unit has labels and stickers
containing important information. Read
and follow their respective instructions.

3. Tilt down the control to remove back

cover (shield).

4. Release tabs on both sides of the
console.

2

5. Expose wiring connectors.

Removing the control unit (continued)

6. Remove connectors.

7. Cut cable tie from the base.

8. Remove complete control console

from the base (left side first).

3