LAARS NeoTherm LC NTV1700 - Install and Operating Manual - Manual (Page 85)

NeoTherm LC Boilers and Water Heaters Page 81
9.8 Installer Parameters
This is a list of all of the parameters which can be accessed using the Installer password.
Label Description How to Reach
4 mA water
temperature
If a 4 – 20 mA input is used to adjust the
setpoint, this entry sets the low limit of the
control range. (In the example shown here,
an input of 4 mA would result in a setpoint of
90°F.)
<’home’ screen> Lead Lag Master button
<Lead Lag Master screen> Configure
button <Lead Lag Master Configuration
screen> Advanced Settings button <Central
Heat screen>
20 mA
water
temperature
If a 4 – 20 mA input is used to adjust the
setpoint, this entry sets the high limit of the
control range. (In the example shown here, an
input of 20 mA would result in a setpoint of
120°F.)
<’home’ screen> Lead Lag Master button
<Lead Lag Master screen> Configure
button<Lead Lag Master Configuration
screen> Advanced Settings button<Central
Heat screen>
Anti Short
Cycle Time
This can be set to prevent the system from
cycling on and off quickly if the heat demand
is near the setpoint and changes quickly.
<’home’ screen> Select a controller <Status
Summary screen> Configure button
<Configuration Menu> Select System
Configuration <System Configuration screen>
Boiler pump
control
The Boiler pump (Pump A) can be turned
on manually, or it can be set to operate
automatically. If it is turned on, then it
remains on until the control is changed back
to Auto. In Auto mode it operates according to
the demand and overrun time.”
<’home’ screen> Select a controller <Status
Summary screen> Configuration button
<Pump Configuration> Left- or Right-
arrow buttons <Boiler Pump screen>
Control Settings button
Boiler Pump
Cycle Count
Boiler pump cycle count. Can be written to
a new value (e.g. if the pump or controller is
replaced).
<’home’ screen> Select a controller
<Status Summary screen> Configure button
<Configuration Menu> Select Statistics
Configuration line
Boiler Name This parameter allows the installer to give
each controller a unique name.
<’home’ screen> Select a controller <Status
Summary screen> Configuration button
<Configuration Menu> System ID and
Access
Burner
Cycle Count
This is incremented on each entry to Run. It
can be written to a with a new value if the
burner or controller is replaced.
<’home’ screen> Select a controller <Status
Summary screen> Configure button
<Configuration Menu> Select Statistics
Configuration line
Burner
Enable
Switch
This parameter enables or disables the burner
control. When it is off, the burner will not fire.
<’home’ screen> Select a controller <Status
Summary screen> Operation button
<Operation screen>
Burner Run
Time
This measures the time spent in the Run state.
It can be written to with a new value if the
burner or controller is replaced.
<’home’ screen> Select a controller
<Status Summary screen> Configure button
<Configuration Menu> Select Statistics
Configuration line
CH (Central
Heat) D gain
This gain is applied to the Differential term of
the PID equation for the CH loop.
<’home’ screen> Select a controller <Status
Summary screen> Configuration button
<Central Heat Configuration> Arrow keys
<Modulation screen>
CH (Central
Heat)
Enable
This parameter determines whether the Central
Heat loop is enabled or disabled. When it is
disabled, heat demand caused by the input
assigned to the CH loop is ignored. It may be
disabled to turn it off temporarily, or because
the application does not use this feature.
‘home’ screen/ Select controller/ Status
Summary screen/ Configuration button/
Central Heat Configuration/ Arrow keys/
Central Heat screen
CH (Central
Heat) Frost
Protection
Enable
The CH frost protection feature can be
enabled to run a pump (or pumps) and
possibly fire the burner whenever the CH
input sensor is too cold.
‘home’ screen/ Select controller/ Status
Summary screen/ Configuration button/
Anti-Condensation Configuration/