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3.9
Menu – Cascade manager
The cascade manager menu has the
following sub menus:
Cascade manager
Status
Operating Mode
Settings
3.9.1
Menu – Cascade manager -
Status
On selecting status, the following sub menus
are available:
Cascade manager
Summary
Boilers
This will now show the status of the plant
cascade, and each boiler in the cascade.
3.9.2
Menu – Cascade manager –
Status – Summary
Summary shows the actual heat capacity
being generated and the target calculated
requirement.
Summary
Actual: 0%
Requested: 0%
3.9.3
Menu – Cascade manager –
Status – Boilers
Summary shows the actual operating mode
and heat capacity being generated by each
boiler, the list can be scrolled if required to
show all boilers configured:
Boilers
Boiler 1: Off, 0%
Boiler 2: Off, 0%
3.9.4 Cascde Manager - Operating
mode
The Cascade boiler sequence control can be
set to one of three control methods. Select
the field in order to scroll through the three
options.
Hours run
- The sequence changeover
is determined by the number of burner-on
hours. The hours run value can be adjusted
in the Settings menu.
Operating mode
Hours run
Done
Fixed Order
- The sequence changeover
order is fixed.
Operating mode
Fixed order
Done
Timed
- The sequence changeover is
determined by operating time period. The
period can be adjusted in the Settings
menu.
Operating mode
Timed
Done
Once selected, select Done to confirm.
Operating mode
Timed
Done
3.9.5
Menu – Cascade manager –
Settings
The settings menu will have content based
upon configuration of a Slave heat source
and the selected Cascade Operating mode.
Hours run or Timed.
All options are shown below, but not all may
be present.
Settings
Boiler modulation
Sequence on delay
Hours run
Settings
Boiler modulation
Sequence on delay
Hours run
Sequence order
Settings
Sequence on delay
Hours run
Sequence order
Timed
Settings
Hours Run
Sequence order
Timed
Ext. heat source sequence
Settings
Sequence order
Timed
Ext. heat source sequence
Settings
Timed
Ext. heat source sequence
3.9.6
Menu – Cascade manager –
Settings – Boiler modulation
Boiler modulation controls the switching
capacity set points in the cascade. Each
boiler in cascade can be switched on at the
earliest or latest modulation capacity set
point (modulation max.), as well as switched
off in the same way (modulation min.).
Boiler modulation
Modulation max.
Modulation min.
3.9.7 Modulation max
This causes the first boiler in the sequence to
modulate up to the Modulation max capacity
setting before it brings on the second boiler
in the sequence and then modulates down
to match the capacity of both. This continues
for each boiler.
Modulation max.
80%
3.9.8 Modulation min
This causes the cascade to modulate down
to the Modulation min setting on each boiler
before switching one off. This then continues
for each boiler.
Modulation min.
30%
3.9.9
Menu – Cascade manager –
Settings – Sequence on delay
This parameter sets the time delay when
bringing on boilers in sequence, this is to
allow for the boiler cascade to better match
the load during the start of a demand cycle.
Sequence on delay
10secs
3.9.10
Menu – Cascade manager –
Settings – Sequence order
The order that the boilers run in sequence
can be set, this does not affect the lead boiler
rotation. To change the order, remove the
boiler numbers in sequence by setting them
to NN and then redefine the boiler numbers
as required. By default the boiler number
follows the sequence number.
Sequence order
Seq. 1: Boiler 01
Seq. 2: Boiler 02
