CleaverBrooks CFC-500 Operation, Service And Parts Manual page 216

CB FALCON
Parameter Name
CH TOD setpoint This Setpoint is used when the time-of-day input is on. If the ODR function is active, this
Setpoint provides one coordinate for the shifted (because TOD is on) outdoor reset curve,
as described for the CH Outdoor Reset parameter.
DBI time None, 4 sec, 10 sec, 15 sec
Delta-T degrees If the outlet is hotter than the inlet temperature by the amount given by this parameter, the
response defined for the Delta-T Limit Response will occur. Stepped Modulation Limiting will
occur as the temperature approaches this limit.
Delta-T delay This parameter provides the delay time for the Delta-T limit.
Delta-T enable This parameter enables or disables the entire delta-T limit function.
Delta-T exch/outlet Disable, Enable Delta-T, Enable Inversion Detection, Enable Delta-T and Inversion
enable Detection.
Delta-T inlet/exch Disable, Enable Delta-T, Enable Inversion Detection, Enable Delta-T and Inversion
enable Detection.
Delta-T inlet/outlet Disable, Enable Delta-T, Enable Inversion Detection, Enable Delta-T and Inversion
enable Detection.
Delta-T inverse limit This provides the time limit during which inverted temperature is tolerated when one of the
time two inverse detection option is enabled.
Delta-T inverse limit If temperature inversion detection is enabled and it persists for the time given by the Delta-
response T inverse limit time, then the response described by this parameter occurs.
The delay time used is the time specified by the Delta-T delay and the retry limit is the count
specified by the Delta-T retry limit.
Delta-T rate limit Disable then no modulation limiting occurs as the delta-T threshold is approached.
enable Enable, then the Stepped Modulation Limiting feature is active for Delta-T.
Delta-T response If the temperature difference exceeds the limit and Recycle && delay is selected then the
burner control recycles and holds while waiting for a delay (see the Delta-T Limit Delay
parameter) to expire.
Delta-T retry limit If either the Delta-T response or the Delta-T inverse limit response specify a retry limit, then
any recycles due to reaching the corresponding response threshold are counted. If this
count ever exceeds the "n" value, then a lockout occurs.
DHW This parameter enables or disables anti-condensation for the DHW sensor.
anticondensation
enable
DHW If DHW anti-condensation is enabled, has priority, DHW is firing the burner, and the outlet is
anticondensation below the temperature given by this parameter then the firing rate set to the Maximum
setpoint modulation rate until the temperature exceeds this by 4 degrees F.
DHW Connector Designates the Sensor type connected to the control for proper reading.
Type
DHW D gain This gain applied to the Differential term of the PID equation for the DHW loop.
DHW demand The source of DHW loop control can be specified to use different inputs.
switch
DHW enable This parameter determines whether the DHW loop is enabled or disabled. It may be
disabled to turn it off temporarily or because the application does not use this feature.
DHW forced rate For DHW demand, if the DHW forced rate time is non-zero, then the firing rate will be held
at the rate specified here during that time. This parameter is also needed as the starting
point for Slow State, even if the forced rate time is zero.
DHW forced rate For DHW demand, if this time is non-zero then, upon entry to Run, the firing rate will be held
time at the DHW forced rate.
DHW frost overrun This time indicates how long the DHW pump should continue to run after DHW frost
time protection pump demand ends.
DHW frost The DHW frost protection feature can be enabled to turn the DHW pump and possibly fire
protection enable the burner whenever the DHW input sensor is too cold.
DHW high limit This parameter enables or disables the DHW high limit function. It must be disabled when
the DHW input is used as a switch to indicate DHW demand.
750-265
Table 47. Parameter Glossary.
Short Description
92
Ref. Page
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44
43
43
43
43
44
44
44
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44
50
50
20
34
34
19
48
48
42
42
49