Crown Boiler BWF Series, Supplement Manual

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TABLE 10b.4: OPERATING MODE PARAMETERS
Parameter # Description Meaning
bt Boiler Temperature Current boiler water temperature measured by the control’s sensor.
SP Boiler water set point
Current target temperature (always the same as the high limit setting unless
Crown outdoor reset card option is installed).
HL High Limit Set point
Boiler will stop firing if boiler water temperature exceeds this value (Circulator/s
will continue to operate)
HdF
High Limit Differential
If high limit setting is reached, boiler water temperature will need to drop by this
amount before boiler will again fire during the same call for heat.
tt Heat Request Status Shown as either ON or OFF. Indicates whether there is a call for heat.
dh DHW Request Status
Shown as either ON or OFF. Indicates whether there is a call for domestic
hot water (DHW). Note that if the dh zone on the S9361A is used as a second
heating zone (see Table 10b.5), this parameter will be shown as OFF and tt will
be shown as ON when this zone calls for heat.
FLA Flame Current Flame rectification signal (uA)
run Run Time Hours
Total amount of time gas valve has been open (burner firing) since control was
new (hours, starting from 1).
CyC Boiler Cycles Total number of burner cycles on the control
Err Error Number
Present only if the control has detected a problem. See Table 13.0 for a list of
error codes and suggested corrections.
TABLE 10b.5: ADJUSTMENT MODE PARAMETERS
Status # Description
Factory
Setting Permissible Range
HL High Limit Set point 180F 140-220F
dF
High Limit Differential 15F 10-30F
Or Circulator overrun 0 min 0-10 minutes
PP Thermal Purge time 2 min 2-20 minutes*
St Thermal Purge Start Temp 140F 140-180F
Pt DHW Priority ON ON or OFF
dh Use of Second Zone dh
dh (dhw)
or
tt2 (2nd heating zone).
rst Reset N/A
OFF or
Momentary ON
F-C Temperature Units F F or C
bAc Exit Adj. mode N/A N/A
* Thermal purge time may be reduced to 0 minutes if Crown outdoor reset card is installed.