CB FALCON
45 750-265
Heat Exchanger High Limit
A temperature limit may be imposed on the exchanger
temperature.
T-Rise degrees per second limit Degrees or None
For any input that has T-rise detection enabled, this parameter provides the maximum rate of
temperature increase that will be allowed. If the temperature increases at a rate greater than
this, and this rate of increase persists for 4 seconds then the response specified by T-rise
response occurs.
T-Rise response Lockout, recycle & delay, Recycle & delay with retry limit
Specifies response should “T-Rise degrees per second limit” is exceeded.
T-rise delay mm:ss or None
Specifies the delay time that occurs whenever a recycle occurs due to a T-rise event and the
specified response includes “Recycle...” The burner will remain in the Standby Hold condition
until the delay expires.
T-rise retry limit n
If the “T-rise response” specifies 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.
Table 19. T-Rise Parameters. (Continued)
Parameter Comment
Table 20. Heat Exchanger High Limit Parameters.
Parameter Comment
Heat exchanger high limit Disable, Enable
This enables/disables temperature rise detection for the heat exchanger sensor S9 (J9
terminal 6).
If this selection is “Enable” then the Stack Connector Type must be either “10K single non-
safety NTC” or “12K single non-safety NTC.” If this condition is not met then a lockout occurs
because the exchanger input requires using the Stack sensor as two separate sensors. Stack
being S8 (J9 terminal 4) and heat exchanger being S9 (J9 terminal 6).
Heat exchanger high limit
setpoint
Temperature or none
Provides the setpoint at which a response occurs if “Heat exchanger high limit” function is
enabled.
Heat exchanger high limit
response
Lockout, recycle & delay, Recycle & delay with retry limit
Specifies response should “Heat exchanger high limit setpoint” threshold is reached.
Heat exchanger high limit delay mm:ss or None
Specifies the delay time that occurs whenever a recycle occurs due to a Heat exchanger high
limit event and the specified response includes “Recycle...” The burner will remain in the
Standby Hold condition until the delay expires.
Heat exchanger retry limit n
If the “Heat exchanger high limit response” specifies a retry limit, then any recycles due to
reaching the heat exchanger high limit threshold are counted. If this count ever exceeds the
“n” value, then a lockout occurs.
Heat exchanger T-rise enable Enabled, Disabled
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