Velocity Shadow Series, Installation And Operating Instructions Manual

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10) If the boiler is to be converted to propane (LP gas), start-up and adjust throttle as described in Appendix A.
11) Start the boiler using the lighting instructions on page 61 . With the boiler powered up, and with no call for heat, the display
will “boot up” as shown in Figure 11.2a for a period of 1-2 minutes. Once a call for heat is present, the demand code will
alternately flash with the outlet temperature. (Figure 11.2b)
12) The boiler should attempt to fire approximately 30 seconds after a call for heat appears. With the upper front cover removed
from the boiler, this try for ignition will appear as an audible spark (lasting approximately 4 seconds) and an audible click
from the gas valve. Upon initial start-up, the gas train will be filled with air. Even if the gas line has been completely purged
of air, it may take several tries for ignition before a flame is established. If the boiler does not light after six tries for ignition,
it will enter a “Hold” and will wait for one hour before attempting another ignition sequence. This “Hold” can be reset by
interrupting power to the boiler for a few seconds. Once a flame has been established for the first time, subsequent calls for
burner operation should result in a flame on the first try.
13) If there is a problem that appears before the first trial for ignition, or if the boiler fails to light after six tries for ignition, the
display will alternately flash the outlet temperature and a “hold code” (Fig. 11.2c). This code is 110 in the case of failure to
light after 5 retries for ignition. For more information, and a complete list of Hold codes, see Part XIV of this manual.
14) Inspect the flame visible through the window. On high fire the flame should be stable and mostly blue (Fig.11.3). No yellow
tipping should be present; however, intermittent flecks of yellow and orange in the flame are normal.
15) Check the inlet gas pressure. Verify that the inlet gas pressure is between the upper and lower limits shown on the rating
plate with all gas appliances on and off.
BEFORE OPENING VENT.
ATTACH 1/4" ID CLEAR
TUBING TO HOSE BARB
AND ROUTE TO SAFE PLACE
AWAY FROM CONTROLS
MANUAL AIR VENT
FIGURE 11.1: LOCATION OF MANUAL AIR VENT