Daikin Magnitude Installation, Operation And Maintenance Manual page 37

Procedure for Changing a Setpoint
A list of setpoints along with their default value, available
setting range, and password authority can be found in the
tables under each Setpoint Screen, starting on
Follow the steps listed below in order to change a setpoint.
CAUTION
Many setpoints are interactive. Changes may have an adverse
effect on chiller operation. Only trained operators should be
allowed to change chiller setpoints.
1. Press the applicable Setpoint Group. (A complete
explanation of setpoint content of each group follows this
section.)
2. Select the desired setpoint by pressing the numbered
Setpoint Selection button.
3. Press the CHANGE button to change a setpoint value.
The Keyboard Screen will be turned on automatically to
facilitate entering the password.
4. Input the appropriate password number. (Use 100 for
operator level or 2001 for manager level. The technician
level password is only provided to Daikin Applied
technicians) There is a small delay between pressing the
keypad and recording the entry. Be sure that an asterisk
appears in the window before pressing the next number.
5. After inputting the password on the Keyboard Screen,
press ENTER to return to the Setpoint Screen. The
password will remain active for 15 minutes after initiation
and does not need to be re-entered during this period.
6. Press CHANGE again on the Setpoint Screen. The right
side of the screen will become inactive (the background
will turn blue). The Numeric Keypad and Action buttons
in the lower left-hand corner of the screen will become
active (the background will turn green).
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7. Setpoints with numeric values can be changed in two
ways:
page 36.
Some setpoints are selectable text rather than numeric
values. For example, LWT Reset Type (Setpoint 7) on
the WATER Setpoint Screen
can be "None" or "4-20 ma." The selection can be made
by toggling between choices using the UP or DOWN
button. If dashed lines appear in the setpoint window it
means that toggling in that direction can go no further,
so reverse direction. Press ENTER to enter the choice or
CANCEL to cancel the transaction.
Once CHANGE is selected, the CANCEL or ENTER
buttons must be pressed before another setpoint can be
selected.
8. Additional setpoints can be changed by selecting another
setpoint on the screen using the Setpoint Selection
buttons or by selecting an entirely new group of setpoints
using the Setpoint Group buttons.
Explanation of Setpoints
There are ten setpoint groups shown on the Setpoint Screens:
1. TIMERS, sets timers such as start-to-start, etc.
2. ALARMS, sets the limit and shutdown alarms.
3. VALVE, sets the parameters for operation of an optional
field-installed tower bypass valve.
4. TOWER, selects the method of controlling the cooling
tower and sets the parameters for fan staging/VFD.
5. MOTOR, selects motor related setpoints such as amp
limits. Also has maximum and minimum rate of change of
chilled water temperature.
6. MODES, selects various modes of operation such as
control source, multiple compressor staging, pump
staging, BAS protocol, etc.
7. WATER, sets leaving water temperature setpoint, start
and stop delta-T, resets, Templifier settings, etc.
8. INTERFACE, sets software and administrative options.
9. COMMISSION, sets parameters and component
configurations.
10. ECONOMIZER, sets available options for economizer if
unit is equipped
Each of the ten setpoint groups are detailed in the following
pages.
35
• Select the desired value by pressing the numbered
buttons on the Numeric Keypad. Press ENTER
to enter the value or CANCEL to cancel the
transaction.
• Press the UP or DOWN button to increase or
decrease the value displayed. Press ENTER
to enter the value or CANCEL to cancel the
transaction.
(Figure 49 on page
IOM 1210-7 • MAGNITUDE
o
peraTIon
48)
MODEL WMC CHILLERS
®