Chapter 4 — CFC Commissioning
Part No. 750-263 4-15
• Before proceeding, review Section 4.3 - Control Setpoints for
initial LGPS, HGPS, and CAPS settings.
Note: Close the downstream manual gas shut-off valve before
checking pressure switches and CAPS.
While performing the following safety checks, use the CB Falcon
Annunciation screen to monitor the status of the circuits involved.
P
ress <Annunciation> on the Operatio
n page to access this screen.LGPS
1. To check the Low Gas Pressure Switch, first close the upstream
manual shutoff valve (both manual shutoff valves should now be
closed).
2. Start the burner and wait 10 seconds during purge for CAPS to
be made.
3. Turn the LGPS setting to maximum.
4. Open the test cock to bleed the gas line.
5. The controller should lock out. The screen will indicate Lockout
67 ILK OFF.
6. Reset the controller and change the LGPS setting back to
minimum to proceed.
CAPS
1. Initiate burner sequence.
2. During purge cycle, set Combustion Air Proving Switch to its
maximum setting.
3. The CB Falcon should lock out on an airflow failure. The display
will show Lockout 65 Interrupted Airflow Switch OFF.
Note: If the CAPS fails to open even when set to maximum, test by disconnecting
the low-pressure line to the switch and initiating burner sequence. The switch
should now break during the purge cycle. Reconnect low-pressure side after a suc-
cessful CAPS check.
4. Following a successful CAPS check, dial the CAPS back to its
minimum setting and reset the CB Falcon.
Figure 4-9 Annunciation Screen
CAPS low pressure connection
To Next Page
Loading...
Need help?
General
