Preparing The Control Unit Installation - Viessmann Vitocrossal 300 CT3 Series Installation Instructions Manual

Assembly

Preparing the Control Unit Installation

22
Vitocrossal 300, CT3 Series Installation
1. Attach the bottom of the mounting panel A with
self-tapping screws B 3.9×9.5 to the side panel.
2. Attach the mounting panel B with two self-tapping
screws B 3.9×9.5 on the back of the mounting panel
(closed side oriented towards the boiler door).
3. Hook the rear of the control unit into the hooks
on the rear wall of the panel.
4. Pull burner cables forward through the clean-out
aperture (position surplus cable lengths above the
side panel).
IMPORTANT
Control cabling may not be exactly as illustrated.
Follow Vitotronic control installation instructions
for proper cabling.
5. Attach the back of the control unit with self-tapping
screws B 3.9×30 on the back of the mounting panel
B.
6. Guide the boiler temperature sensor lead c (supplied
with the control unit) through the knockout of the
mounting panel A and through the aperture in the
side panel, and push the back of the control unit
forward through the opening (position excess leads
above the side panel).
IMPORTANT
Control cabling may not be exactly as illustrated.
Follow Vitotronic control installation instructions
for proper cabling.
CAUTION
Do not kink the capillary tubes, otherwise the sensor
function might be compromised.
7. Guide the capillary tubes through the knockout of
the mounting panel A and the side panel opening
(position excess lengths of leads above the side
panel).