SBM SX Series Installer's Instructions page 13

 First start-up
a) Preliminary checks:
* calibration of control unit fuses.
* ground-fault breaker operation ("TEST" button).
b) Initial settings:
* main gas valve closed.
* individual valves open.
* ground-fault breaker set to "ON".
* thermostat or programmable controller set to correct temperature setting.
c) Ignition
* manual operation
* automatic control
- open the main gas valve.
- start the heater ignition cycle.
- if the flame is not lit after 45 seconds, start a second ignition cycle
- if the flame is still not lit or goes out, refer to chapter 5
(REPAIRS).
- open the main gas valve.
- check the settings (temperature, time).
- change module programming if required.
- run a full heating and cooling cycle and check:
. ignition cycle length (45 seconds maximum).
. ignition and shut-down of heaters according to temperature settings.
13