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N
EO
T
HERM
Residential Boilers
®
APPENDIX A
SOFTWARE CONTROL FUNCTIONS
This table includes a listing of all of the control functions that can be used by the operator or installer. Functions that
require a password are indicated in the second column.
Name
PW?
Function
How to get there
Adjustable high limit
Y
The absolute high limit for the water outlet is pre-set
at the factory. If desired, you can set a lower value
here.
Quick Start
Adjustable stack limit
Y
The absolute high limit for the stack temperature
is pre-set at the factory. If desired, you can set a
lower value here.
Quick Start
Alert log
-
This displays the 15 most recent alerts.
Info/ Diagnostics/ History
Analog sensors
-
This shows the current condition of selected
sensors – temperatures, fan speed, flame signal,
etc.
Info/ Diagnostics
Anti short-cycle time
-
This feature can be set to prevent the burner from
firing and then shutting off quickly in response to a
call for heat that changes state quickly.
Info/ Advanced Setup/ System
Config./ System Config.
Base load common rate
(LL)
-
When using the Lead/ Lag system to control
multiple boilers –
As the heating load increases, this value sets the
point where the controller will fire the next boiler.
See the section on “About Lead/ Lag.”
Info/ Advanced Setup/ Lead Lag
Configuration/ LL Master Config.
Boiler pump control
Y
The boiler pump can be turned on manually, or it
can be set to operate automatically.
Info/ Test/ Manual Pump Operation
Info/ Advanced Setup/ System
Config./ Pump Config.
Boiler pump cycle count
Y
A new value can be written here if the pump or
controller is replaced.
Info/ Advanced Setup/ System
Config./ Statistics Config.
Boiler pump overrun
time
Y
This indicates how long the boiler pump will remain
on after demand from any source ends.
Info/ Advanced Setup/ System
Config./ Pump Config.
Burner cycle count
Y
This is incremented on each entry to Run. A new
value can be written here if the burner or controller
is replaced.
Info/ Advanced Setup/ System
Config./ Statistics Config.
Burner name
Y
This parameter allows the installer to give each
boiler unit a unique name.
Info/ Advanced Setup/ System
Config./ System ID and Access
Burner off inhibit time
Y
Set to “No Value.”
Info/ Advanced Setup/ System
Config./ System Config.
Burner run time
Y
This measures the time spent in the Run state.
A new value can be written here if the burner or
controller is replaced.
Info/ Advanced Setup/ System
Config./ Statistics Config.
CH setpoint
-
This setpoint is used to control the hydronic (Central
Heat) function.
Quick Start
Info/ Advanced Setup/ CH
Configuration
D gain (CH)
Y
This gain is applied to the Differential term of the
PID equation for the CH loop.
Info/ Advanced Setup/ CH
Configuration
D gain (DHW)
Y
This gain is applied to the Differential term of the
PID equation for the DHW loop.
Info/ Advanced Setup/ DHW
Configuration
D gain (LL)
Y
When using the Lead/ Lag system to control
multiple boilers –
This gain is applied to the Differential term of the
PID equation for the hydronic heating loop.
Info/ Advanced Setup/ Lead Lag
Configuration/ LL Master Config.
Содержание NEOTHERM NTH Series
Страница 4: ...LAARS Heating Systems...
Страница 24: ...Page 24 LAARS Heating Systems Figure 9 Hydronic Piping Single Boiler Zoning with Circulators...
Страница 26: ...Page 26 LAARS Heating Systems Figure 11 Hydronic Piping Multiple Boilers Zoning with Circulators...
Страница 33: ...Page 33 NEOTHERM Residential Boilers Figure 16 Control Panel Layout...
Страница 38: ...Page 38 LAARS Heating Systems Figure 19 Ladder Diagram 7 H Ladder Diagram...
Страница 67: ...Page 67 NEOTHERM Residential Boilers Figure 44 Heat Exchanger Components 68A 65 67 60 66 63 64...
Страница 68: ...Page 68 LAARS Heating Systems Figure 45 Electrical Components...
Страница 82: ...LAARS Heating Systems Notes...
Страница 83: ...NEOTHERM Residential Boilers Notes...
