HTP ELP-199 User Manual
Page 64
64
LP-294 REV. 2.20.14
CASCADE SETTINGS
Start Differential
to System Setpoint
9
o
F
Allows the installer to set the system setpoint differential. Default is 9
o
F. Range: 1
– 15
o
F.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Stop Differential
to System Setpoint
5
o
F
Prevents the system from overshooting temperatures by stopping all boilers once the stop
differential is met. Default is 5
o
F. Range: 1
– 15
o
F.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Next Boiler
Start Delay time
_3min
If the system setpoint temperature (minus start differential) is not reached, or the first boiler has too
high a modulation range, the next boiler is started after a certain delay time.
Default is 3 minutes. Range: 1
– 15 minutes.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Last Boiler
Stop Delay time
_3min
If the boilers operate at the minimum switching rate and the system setpoint temperature is too
high, this option determines when the last boiler will stop. Default is 3 minutes. Range: 1
– 15
minutes.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Max increased
Boiler Offset
10
o
F
Maximum boiler offset temperature above the system setpoint used by the intelligent PID
cascading controller to meet system setpoint. Default is 10
o
F. Range: 0
– 36
o
F.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Min decreased
Boiler Offset
20
o
F
Minimum boiler offset temperature below the system setpoint used by the intelligent PID cascading
controller to meet system setpoint.
Default is 20
o
F. Range: 0
– 36
o
F.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Delay Factor for
Boiler Offset
2
Time factor is mul
tiplied with “next boiler start delay time” and determines when the intelligent PID
cascading controller becomes active. Default is 2. 0 = Disabled.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Next Boiler
Start Rate
80
When this modulation range is reached by one or more boilers, the next boiler is started after the
“next boiler start delay time”.
Default is 80. Range: 10
– 100.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Last Boiler
Stop Rate
40
When this modulation range is reached by one or more boilers, the last boiler is stopped after the
“last boiler stop delay time”. Default is 30. Range: 10 – 100.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Boiler
Rotation Interval
1 day
The first boiler is changed after the rotation interval “1 – 5 days”. If set to “0” no rotation occurs. If
one boiler is dedicated to DHW, it will always be the last boiler in the rotation interval. Default is 1
day. Range: 0
– 30 days.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
Boilers for DHW
Boiler Address All
This option is used to select boilers dedicated to DHW. Options:
ALL = CH and DHW are connected in parallel
2
– 16 = Certain boilers are dedicated to DHW
Default is ALL. Range: All, 1
– 16.
Pressing the
▼ or ▲ keys allows the Installer to view and/or adjust more data or return to the previous screen.
CASCADE SETTINGS
System Pump
Post Pump Time
30sec
Selects the time the system pump will run after burner stop. Default is 30 seconds.
Range: 1
– 90 seconds.
Pressing the
▲ key allows the Installer to return to the previous screen.
Table 29
– Installer Menu – Cascade Settings Screens