Install Instructions

90 103448-08- 9/16
Figure 36: Burner Flame
it may take several tries for ignition before a ame is
established. If more than 2 tries for ignition are needed,
it will be necessary to press the reset button to restart
the boiler. Once a ame has been established for the
rst time, subsequent calls for burner operation should
result in a ame on the rst try.
I. Check Burner Flame
Inspect the ame visible through the window. On high
re the ame should be stable and mostly blue (Figure
36). No yellow tipping should be present; however,
intermittent ecks of yellow and orange in the ame 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
Asphyxiation Hazard. The outlet pressure for
the gas valve has been factory set and requires
no eld 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. For LP Gas, perform procedure as described in
Paragraph R “Field Conversion From Natural Gas to LP
Gas” before starting Paragraph L “Checking/Adjusting
Gas Input Rate”.
For natural gas, proceed to Paragraph L
“Checking/Adjusting Gas Input Rate”.
L. Perform Combustion Test
WARNING
Asphyxiation Hazard. 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.
WARNING
Any gas valve adjustments (throttle and/or offset)
specied herein and subsequent combustion
data (%O
2
, %CO
2
, CO ppm) collection must
be performed using a calibrated combustion
analyzer.
Failure to use combustion analyzer could result
in property damage, personal injury or loss of life.
IX. System Start-up (continued)
Status Control Action
Initiate Power-up
Standby Delay
This state is entered when a delay is
needed before allowing the burner control
to be available and for sensor errors.
Standby
Boiler is not ring. There is no call for
heat or there is a call for heat and the
temperature is greater than setpoint.
Safe Startup
Tests ame circuit then checks for ame
signal.
Drive Purge
Driving blower to purge rate setting and
waiting for the proper fan feedback.
Prepurge
Purges the combustion chamber for the
10 second purge time.
Drive Light-off
Driving blower to light-off rate setting and
waiting for the proper fan feedback.
Pre-ignition
Test
Tests the safety relay and veries that
downstream contacts are off.
Pre-ignition
Energizes the igniter and checks for
ame.
Direct
Ignition
Opens main fuel valve and attempts
to ignite the main fuel directly from the
ignition source.
Running
Normal boiler operation. Modulation rate
depends on temperature and setpoint
selections and modulating control action.
Postpurge
Purges the combustion chamber for the
30 second purge time.
Lockout
Prevents system from running due to a
detected problem and records fault in
Lockout History.