CB FALCON
750-265
82
Setpoints
TIME OF DAY
The Time of Day has one sources of control: a switch contact.
Closed TOD is an on condition; open, then TOD is off.
OUTDOOR RESET
The outdoor reset for the LL CH functions are implemented as
described for a stand-alone CH loop.
Each of the loops which implements outdoor reset and boost
has its own parameters. The parameters used by the LL
master are:
•
LL setpoint
•
LL CH TOD setpoint
•
LL CH ODR minimum outdoor temperature: degrees or
None
•
LL CH ODR maximum outdoor temperature: degrees or
None
•
LL CH ODR low water temperature: degrees or None
Demand and Rate
ON/OFF HYSTERESIS
Includes hysteresis shifting at turn-on, turn-off.
LEAD LAG PID
The behavior of the Lead Lag PID function is identical to the
behavior of the stand-alone CH PID function. The same gain
scalers and algorithms are used.
Table 40. Setpoint Parameters.
Parameter
Comment
LL CH Setpoint source
Local, S2 4-20mA
If the setpoint source is Local then the Falcon control's local setpoint system is used.
This setting enables the normal use of the CH setpoint, CH TOD setpoint, and the CH
outdoor reset parameters and functions.
If the setpoint source is S2 4-20mA then the setpoint is determined by the 4-20mA input on
S2, and the two parameters described below. If the 4-20mA signal goes out of range or is
invalid, and this persists for a specified time, then the setpoint source reverts to “Local”. In
this case once it has gone to “Local”, it remains that way until the 4-20mA signal is stable
again.
LL CH 20mA Water Temperature
CH 4mA Water Temperature
Temperature or None
These provided the 20mA and 4mA temperatures for the interpolation curve. If either of these
have the None value, are invalid, are out of range, or are too close for interpolation, an alert is
issued and the setpoint reverts to “Local” when it is selected as 4-20mA.
LL CH setpoint
Degrees or None
This setpoint is used when the time-of-day input is off. If the ODR function is inactive then the
setpoint is used as-is.
If the ODR function is active then this setpoint provides one coordinate for the outdoor reset
curve.
LL CH TOD setpoint
Degrees or None
This setpoint is used when the time-of-day input is on. If the ODR function is inactive then the
setpoint is used as-is.
If the ODR function is active then this setpoint provides one coordinate for the shifted
(because TOD is on) outdoor reset curve.
LL CH ODR minimum water
temperature
Degrees or None
This specifies the minimum outdoor reset setpoint for the LL master. If the outdoor reset
function calculates a temperature that is below the temperature specified here, then this
parameter's temperature will be used.
If this parameter is invalid or None then the outdoor reset function will be inhibited and will not
run: if it is enabled then an alert is issued.
Table 41. On/Off Hysteresis Parameters.
Parameter
Comment
LL off hysteresis
LL on hysteresis
Degrees or None
The LL hysteresis values apply to all setpoint sources. The behavior of the hysteresis
function is identical to the behavior of the stand-alone CH hysteresis function, except:
•
where stand-alone CH hysteresis uses the on/off status of a single burner, the LL
hysteresis uses the on/off status of all slave burners: this status is true if any slave burner
is on, and false only if all are off.
•
where stand-alone CH hysteresis uses time of turn-on and turn-off of a single burner, the
LL hysteresis uses the turn-on of the first slave burners and the turn-off of the last slave
burner.
Summary of Contents for CFC-1000
Page 35: ...Section 2 Installation Part No 750 263 2 21 Figure 2 23 Gas Piping ...
Page 47: ...Section 2 Installation Part No 750 263 2 33 Figure 2 41 Electrical Connection Diagram ...
Page 49: ...Section 2 Installation Part No 750 263 2 35 Figure 2 43 CFC Wiring Diagram dual fuel units ...
Page 50: ...Section 2 Installation 2 36 Part No 750 263 ...
Page 70: ...Section 3 Stack and Intake Vent Sizing and Installation 3 20 Part No 750 263 ...
Page 102: ...Section 4 CFC Commissioning 4 32 Part No 750 263 ...
Page 108: ...Section 5 Service and Maintenance 5 6 Part No 750 263 ...
Page 113: ...Section 6 Parts Part No 750 263 6 5 Figure 6 3 Casing Table 6 5 Casing parts ...
Page 117: ...Section 6 Parts Part No 750 263 6 9 Figure 6 7 Electrical assemblies single fuel ...
Page 123: ...APPENDIX A CB FALCON CONTROLLER ...
Page 124: ......
Page 244: ...CB FALCON 750 265 120 ...
Page 245: ...APPENDIX B CB FALCON PLUG IN MODULE ...
Page 246: ......
Page 250: ......
Page 251: ...APPENDIX C GAS VALVE ...
Page 252: ......
Page 269: ...APPENDIX D CB FALCON MODBUS COMMUNICATION ...
Page 270: ......