Burnham ALPINE Installation, Operation And Service Instructions page 87

Xi. System Start-up (continued)
Control Action
Status
Power-up
Initiate
This state is entered when a delay is
Standby Delay needed before allowing the burner control
to be available and for sensor errors.
Boiler is not firing. There is no call for
heat or there is a call for heat and the
Standby
temperature is greater than setpoint.
Test flame circuit then checks for flame
Safe Startup
signal.
Driving blower to purge rate setting and
Drive Purge
waiting for the proper fan feedback.
Purge the combustion chamber for the 10
Prepurge
second purge time.
Driving blower to light-off rate setting and
Drive Light-off
wait for the proper fan feedback.
Test the safety relay and verify that
Pre-ignition
downstream contacts are off.
Test
Energize the igniter and check for flame.
Pre-ignition
Open main fuel valve and attempt to ignite
Direct
the main fuel directly from the ignition
Ignition
source.
Normal boiler operation. Modulation rate
Running depending on temperature and setpoint
selections and modulating control action.
Purge the combustion chamber for the 30
Postpurge
second purge time.
Prevent system from running due to a
Lockout detected problem and record fault in
Lockout History.
H.
Purge Air From Gas Train
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 more than 5 tries for ignition are needed,
it will be necessary to press the reset button to restart
the boiler. Once a flame has been established for the
first time, subsequent calls for burner operation should
result in a flame on the first try.
I.
Check Burner Flame
Inspect the flame visible through the window. On high
fire the flame should be stable and mostly blue (Figure
52). No yellow tipping should be present; however,
intermittent flecks of yellow and orange in the flame are
normal.
J.
Check Gas Inlet Pressure
Check the inlet pressure and adjust if necessary. Verify
that the inlet pressure is between the upper and lower
limits shown on the rating plate with all gas appliances
on and off.
WaRning
The outlet pressure for the gas valve has been
factory set and requires no field adjustment. This
setting is satisfactory for both natural gas and
propane. attempting to adjust the outlet pressure
may result in damage to the gas valve and cause
property damage, personal injury or loss of life.
K.
Perform Combustion Test
Boilers are equipped with Flue Temperature Sensor
installed into:
• Flue sensor port of boiler CPVC/PVC two-pipe
vent system connector (floor standing build)
- See Figures 5 and 13.
• Flue sensor port of vent elbow, located inside air
box behind access panel (wall hung build) - see
Figure 6B.
• Flue sensor port of boiler concentric vent collar
(floor standing build) - see Figure 14.
Remove Flue Temperature Sensor and insert the
analyzer probe through Flue Temperature Sensor
silicon cap opening, or if required, remove also the Flue
Temperature Sensor silicon cap and insert the analyzer
probe directly into flue sensor port. Reinstall the sensor
and the cap upon combustion testing completion.
) and CO at both high and low fire.
Check CO (or O
2 2
The boiler may be locked into high of low fire as
follows:
1. To lock the boiler in high fire enter the Manual
control screen by first entering the Adjust screen. To
access the Adjust screen, touch the Adjust button,
then Login using the contractor password "076".
Press Save and then select the adjust button. Enter
the Manual Control button and select "High".
Allow the boiler to operate for approximately 5
minutes before taking combustion readings.
2. To lock the boiler in low fire select "Low" from
the Manual Control screen. Allow the boiler to
operate for approximately 5 minutes before taking
combustion readings.
3. Normal modulation of the boiler will only occur
after the "Auto" button is selected in the Manual
Control screen.
Typical CO readings are shown in Table 23.
2
WaRning
Each alpine Series boiler is tested at the factory
and adjustments to the air fuel mixture are
normally not necessary. improper gas valve or
mixture adjustments could result in property
damage, personal injury, or loss of life.
8