NeoTherm Boilers and Water Heaters
Page 71
When enabled, the Warm Weather Shutdown
feature will turn off the Central Heating
functions when the outdoor temperature
exceeds the setpoint. This prevents the system
from running when there is no need for heat.
Enable -
These options determine how quickly
the system shuts down after the outdoor
temperature rises above the setpoint. The
options are Shutdown immediately/ After
demand ends/ Disabled.
Setpoint -
If the outdoor temperature is higher than this,
the system will shut off the Lead/Lag Central
Heating functions.
13. Press the left-arrow or right-arrow until you see
the Rate Allocation screen (Fig. 92).
fig. 92 – rate allocation
As the load on the system increases, the first
boiler in the Lead/Lag chain will increase the
fan speed until it reaches a certain percentage
of the total output (the “base load”). At that
point, the controller will start the second boiler
in the lead/lag chain. See the explanation at
the beginning of this section and Fig. 51.
Base Load Common -
As the demand increases, this sets the point
at which the controller starts another burner
in the Lead/Lag chain.
To prevent short-cycling, the base load setting
should be set at the values shown in the table
below, or set to higher values.
about the “time of Day” function
If the “time of day” function is enabled, the control
system can be set to maintain different temperatures
for central heat and domestic hot water (other than
the normal setpoints) in the system at certain times of
the day. Normally this function is used to switch to
lower temperatures at night, when the central heating
or domestic hot water demand is reduced. When the
controller acting as the Lead/Lag Master receives a
time of day input, the controller shifts to the special
setpoints entered for central heat and domestic hot
water.
Number
of boilers
Installed
Base load min.
1
65%
2
50%
3
30%
4
30%
table 16 – Base load Settings
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...
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