Optional Accessories - La Spaziale S1 Vivaldi II Owner's Manual

5. Once you are convinced that the expansion valve is properly calibrated, readjust the
rotary pump pressure by unscrewing "B" to reach your preferred pressure - normally in the
range of 8.2 to 9.0 bar. Then tighten lock nut "A".
Notes:
1) Make small adjustments, then turn the pump on and check. Don't attempt any of
these adjustments while the pump is on.
2) The term expansion valve is somewhat of a misnomer as this device is really the
overpressure valve for the group boiler. The steam boiler has its own dedicated valve.

9 Optional Accessories

Drain Kit
Programmable Timer
Use this link to download the installation and programming guide for this device:
http://s1cafe.com/s1v2/images/Vivaldi%20Timer%20Instructions.pdf
S1 Vivaldi II Owner's Manual
Page 27