LAARS Heating Systems
Page 90
Label
Description
How to Reach
Lead lag off
hysteresis
When the Lead/Lag function is enabled, the
control system will not shut off the boilers until
the temperature at the System sensor rises to the
Lead/Lag CH setpoint plus a hysteresis value
(normally about 10°F).
Home screen/ View Lead/Lag button/
Lead/Lag screen/ Lead/Lag Master
button/ Lead/Lag Master screen/
Configure button/ Lead/Lag Master
Configuration screen/ Advanced Settings
button/ Left- or Right- arrow buttons/
Modulation screen.
Lead lag on
hysteresis
When the Lead/Lag function is enabled, the
control system will not fire the boilers until the
temperature at the System sensor drops to the
Lead/Lag CH setpoint minus a hysteresis value
(normally about 10°F).
If Lead/Lag enabled –
Home screen/ View Lead/Lag button/
Lead/Lag screen/ Lead/Lag Master
button/ Lead/Lag Master screen/
Configure button/ Lead/Lag Master
Configuration screen
Lead lag P
gain
This is part of the damping function
(“Proportional”) used when the controller
interprets the input from the System sensor.
Home screen/ View Lead/Lag button/
Lead/Lag screen/ Lead/Lag Master
button/ Lead/Lag Master screen/
Configure button/ Lead/Lag Master
Configuration screen/ Advanced Settings
button/ Left- or Right- arrow buttons/
Modulation screen
Lead/Lag
Slave Enable
Select Enable Slave for Built-in Lead/Lag
Master. Be sure this is turned on for each
controller in the system.
Home screen/ Select controller/ Status
Summary screen/ Configuration button/
Configuration screen/ Select line for LL
Slave Configuration/ Lead/Lag Slave
Configuration screen
Lead/
Lag Slave
Sequence
Order
Enter the position of this Slave in the sequence.
Be sure to enter this for each Slave in the
system.
Home screen/ Select controller/ Status
Summary screen/ Configuration button/
Configuration screen/ Select line for LL
Slave Configuration/ Lead/Lag Slave
Configuration screen
Lead/
Lag Slave
Modbus
Address
Each slave must have a unique Modbus address.
Be sure to enter this for each controller in the
system.
Home screen/ Select controller/ Status
Summary screen/ Configuration button/
Configuration screen/ Select line for LL
Slave Configuration/ Lead/Lag Slave
Configuration screen
Lead/Lag
Outdoor
Reset Enable
Enable = Outdoor Reset feature turned on
Home screen/ View Lead/Lag button/
Lead/Lag screen/ Lead/Lag Master
button/ Lead/Lag Master screen/
Configure button/ Lead/Lag Master
Configuration screen/ Advanced Settings
button/ Left- or Right- arrow buttons/
Outdoor Reset screen
Lead/Lag
Outdoor
Reset
low water
temperature
This parameter is used as the normal setpoint
above the point where Outdoor Reset stops
adjusting for a higher outdoor temperature (the
Max. Outdoor Temperature value)
Home screen/ View Lead/Lag button/
Lead/Lag screen/ Lead/Lag Master
button/ Lead/Lag Master screen/
Configure button/ Lead/Lag Master
Configuration screen/ Advanced Settings
button/ Left- or Right- arrow buttons/
Outdoor Reset screen
Summary of Contents for NTV1000
Page 2: ......
Page 35: ...NeoTherm Boilers and Water Heaters Page 31 Fig 20 Ladder Diagram...
Page 36: ...LAARS Heating Systems Page 32 Fig 21 Wiring Diagram...
Page 37: ...NeoTherm Boilers and Water Heaters Page 33...
Page 51: ...NeoTherm Boilers and Water Heaters Page 47 Fig 52 Connection Terminals...
Page 130: ...LAARS Heating Systems Page 126 Fig 140 Machine Frame and Rear Panel 13 3 PARTS ILLUSTRATIONS...
Page 131: ...NeoTherm Boilers and Water Heaters Page 127 Fig 141 Front Panel and Covers...
Page 132: ...LAARS Heating Systems Page 128 Fig 142 Burners and Combustion Chambers...
Page 134: ...LAARS Heating Systems Page 130 Fig 145 Electronic Components...
Page 135: ...NeoTherm Boilers and Water Heaters Page 131 Fig 146 Condensate Trap Fig 147 Control Bezel...
Page 136: ...LAARS Heating Systems Page 132 Fig 148 Flow Switch...
Page 137: ...NeoTherm Boilers and Water Heaters Page 133 This page intentionally left blank...