LAARS NeoTherm NTV (Sizes 150–850 MBTU/h) - Install and Operating Manual - Manual (Page 75)

Page 71 N eo T herm Boilers and Water heaters
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.