59
Rev 2.1
then a response defined by DHW high limit response will
occur.
Outlet high limit response Lockout Read only
Outlet high limit setpoint 32 °F to 240 °F (0 °C to 115 °C) Installer
Table 4.11 – High Limit Configuration Parameters
4-25 Stack Limit Configuration Parameters
Table 4.12 displays Stack Limit configuration parameters.
Refer to 5-7 STACK LIMIT RELATED CONFIGURATION for Stack Limit parameter programming.
Parameter Comment Password
Stack limit Disabled or enable Stack limit
If set to enable, the stack connector type MUST be 10K
dual-safety NTC.
Installer
Stack limit delay 0-600 seconds (0 = Not configured)
This parameter provides the delay time for the Stack limit.
Installer
Stack limit response Recycle & delay or Lockout
If the stack temperature exceeds the stack setpoint, then
a response will occur. If the
selected response is a lockout, then the burner control
locks out.
However, if the selected response is Recycle & Delay, the
burner control recycles and holds
while waiting for a delay to expire, and after the delay it
tries again.
Installer
Stack limit setpoint -40 °F to 266 °F (-40 °C to 130 °C)
If the stack temperature reaches or exceeds the safety
limit temperature given by this parameter then the
response defined by Stack limit response will occur.
Installer
Table 4.12 – Stack Limit Configuration Parameters
4-26 Other Limit Configuration Parameters
Table 4.13 displays Other Limit configuration parameters.
Refer to 5-8 DELTA-T LIMIT RELATED CONFIGURATION for Other Limit parameter programming.
Parameter Comment Password
Delta-T limit enable Disabled or enable Delta-T limit Installer
Delta-T limit degrees No limit
If the outlet temperature exceeds the inlet temperature
and this difference exceeds the
number of degrees given by this parameter, then the
response defined by Delta-T limit response will occur.
As the temperature approaches this limit, the Stepped
Modulation Limiting function is active.
Installer
Delta-T limit delay (0 = Not configured)
This parameter provides the delay time for the Delta-T
limit.
Installer
Delta-T limit response Lockout, Recycle & delay or Recycle & delay with limit
Lockout: If the temperature difference exceeds the limit,
then a lockout will occur.
Recycle & delay: The burner control recycles with an
alert and holds while waiting for a delay to expire, and
after the delay it tries again.
Recycle & delay with limit: Same as above but with
retry limit. If limit count is reached lockout will occur.
Installer
Delta-T retry limit How many of retry will be tolerated. If demand is not
satisfied and this number of recycles has happened, then
lockout occurs.
Installer
Delta-T rate limit enable Enabling this parameter causes Stepped Modulation to
occur as Delta-T temperature limit is approached.
Installer
Delta-T inverse limit time When temperature inversion detection is enabled for a
pair of sensors, this parameter specifies a time during
which this will be tolerated.
Installer
Delta-T inverse limit response Lockout, Recycle & delay or Recycle & delay with limit
Lockout: When temperature inversion is detected, then a
lockout will occur.
Recycle & delay: The burner control recycles with an
Installer
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