Crown Boiler PHNTM080, Installation And Operation Instructions Manual

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2) Current Priority Screen:
a) Current Demand - The demand to which the boiler is currently responding. If more than one demand is present, it is the
#) %## %# )& &’!‚ "‡&
b) Setpoint - The temperature that the boiler is currently trying to achieve.
c) Supply (or Header) Temperature - The actual water temperature at the current setpoint location (either the boiler
#&\&& %#&&&'# '& #"% Š`
d) Setpoint Source - Should always read “Local S.P.” in the applications covered by this manual.
3) Boiler Temperatures Screen:
a) Supply - Current water temperature at boiler supply sensor.
b) Return - Current water temperature at boiler return sensor.
c) Stack ƒ"% )
d) Header - Current header sensor temperature. This temperature will only be visible if the header was selected as the
#"% Š
4) Burner Status Screen:
a) Burner Status - Indicates what the burner system is currently doing. Typical Burner Status include:
+ Standby - Burner is not needed because there is no call for heat or the target temperature has been reached.
+ Standby Delay - Burner is needed, but is being temporarily held off (generally due to a soft lockout - see
Diagnostics section).
+ Safe Start-up ƒ" # % % % (
+ Drive Purge - Waiting for blower to reach pre-purge speed.
+ Prepurge ƒ' %#' &%%# #_Œ`
+ Drive Light-off - Waiting for blower to prove that it is at the proper ignition fan speed.
+ Pre-ignition test - Test the safety relay and verify that downstream contacts are off.
+ Pre-ignition ƒœ% { % ' #%))## ’‚ %
+ Direct ignition ƒ] ## % % {&\#%))&##~
for ignition period is 4s .
+ Running ƒ„ %
+ Post-Purge - Blower is running after the burner shuts off to clear the combustion chamber of residual gasses. Post
purge time is 30s.
+ Lockout - Boiler is in a hard lockout (see Diagnostic Section).
b) Active Fault _) '## `ƒˆ)# & ' ## #
Touching this indicator takes the user to the Diagnostic Menu. See Section XIV for more information.
c) Hold Delay (Visible only during soft lockout) - Indicates remaining time before next ignition sequence.
d) Flame Signal ƒ& #%## % ‡" ƒ