Laars NTV1000 - Page 87

NeoTherm LC Boilers and Water Heaters
Page 83
Label Description How to Reach
CH (Central
Heat)
Setpoint
This setpoint is used when the time-of-day input
is off. If the outdoor reset function is active, this
setpoint provides one coordinate for the outdoor
reset curve. See the section for the CH Outdoor
Reset parameter.
If Lead/Lag enabled –
<’home’ screen> Lead/Lag Master button
<Lead/Lag Master screen> Congure
button <Lead/Lag Master Conguration
screen>
CH (Central
Heat) “Time
of Day”
Setpoint
This setpoint is used when the time-of-day input
is on. If the outdoor reset function is active,
this Setpoint provides one coordinate for the
shifted outdoor reset curve, because the time-
of-day switch is on. See the section for the CH
Outdoor Reset parameter.”
If Lead/Lag enabled –
<’home’ screen> Lead/Lag Master button
<Lead/Lag Master screen> Congure
button <Lead/Lag Master Conguration
screen>
DHW
(Domestic
Hot Water) D
Gain
This gain applied to the Differential term of the
PID equation for the DHW loop.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration screen>
DHW
(Domestic
Hot Water)
Enable
This parameter determines whether the
Domestic Hot Water loop is enabled or disabled.
When it is disabled, the demand caused by the
DHW sensor is ignored. It may be disabled to
turn it off temporarily or because the application
does not use this feature.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration screen>
DHW
(Domestic
Hot Water)
has priority
over CH
(Central
Heat)
This parameter determines the priority of
Domestic Hot Water vs. Central Heat call-for-
heat, when both of these are enabled and active.
(The DHW priority also may shift for a period
of time, as specied by DHW Priority time and
method parameters.)”
<’home’ screen> Lead Lag Master <Lead
Lag Master screen> Congure button
<Lead Lag Master Conguration screen>
Advanced Settings button/ Left- and
Right- arrow buttons <Domestic Hot
Water screen>
DHW
(Domestic
Hot Water) I
gain
This gain applied to the Integral term of the PID
equation for the DHW loop.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration>
DHW
(Domestic
Hot Water)
off hysteresis
The off hysteresis is added to the Domestic Hot
Water Setpoint to determine the temperature at
which the DHW burner demand turns off.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration screen>
DHW
(Domestic
Hot Water)
on hysteresis
The on hysteresis is subtracted from the
Domestic Hot Water Setpoint to determine the
temperature at which the DHW burner demand
turns on.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration>
DHW
(Domestic
Hot Water) P
gain
This gain applied to the Proportional term of the
PID equation for the DHW loop.
<’home’ screen> Select a controller
<Status Summary screen> Congure
button <Domestic Hot Water
Conguration screen>
DHW
(Domestic
Hot Water)
priority
override time
If this parameter is non-zero then a Domestic
Hot Water demand will shift its priority vs.
other demand sources according to the specied
time. The priority override timing is reset when
demand from the DHW source turns off.
<’home’ screen> Lead Lag Master button
<Lead Lag Master screen> Congure
button <Lead Lag Master Conguration
screen> Advanced Settings button
<Domestic Hot Water screen>