Daikin Magnitude WME Series Installation, Operation And Maintenance Manual page 54

Table 33: In Step 3, the 'Teach' function re-adjusted the flow switch SP while flow was at the minimum desired operating flow. The
chiller will not operate at this flow because the flow switch is OPEN after performing the 'Teach' function. The benefit of the 'Teach'
function is to quickly set the setpoint within the desired operating range. Additional 'manual' adjustment of setpoint is required in
order to allow for chiller operation at this minimum flow. The '+' and '-' buttons on the face of the flow switch allow for the manual
adjustment of the SP. Pressing the '+' button reduces the flow setpoint while pressing the '-' button increases the flow setpoint.
Each button press, '+' or '-', changes the flow setpoint by 2.5 cm/s.
Step 4: Press the '+' button until LED '9' begins to flash, as
shown in Figure 71. Opening of flow switch should now occur
at approximately 80% to 90% of minimum flow.
Figure 71: Upper Range of Minimum Flow
Step 5: Once the SP is set, it is recommended that the
sensor be locked to avoid inadvertent readjustment. This
can be performed by pressing both the '+' and '-' buttons
simultaneously for 10 seconds. The indication goes out
momentarily indicating the unit is locked. To unlock, the same
procedure is performed to toggle to unlocked.
NOTE: 1. The LED window display on flow switch represents
a velocity range of 50 cm/s. The window centers on
the SP. For example, if the SP was set to 200 cm/s,
then the LED labeled '0' would represent a velocity
of 180 cm/s when lit and the LED labeled 9 would
represent a velocity of 230 cm/s when lit.
2. Each LED represents 5 cm/s, or two presses of the
'+' or '-' buttons.
3. When power is initially applied to the flow switch,
all green LEDs light and go out step by step. During
this time, the output is closed. The unit is in the
operating mode.
4. When making manual adjustments to the SP, if no
button is pressed for two seconds, the unit returns to
the operating mode with the newly set value.
IOM 1266-2 • MAGNITUDE MODEL WME CHILLERS
®
Flow below display range: The SP LED will be lit red and
the leftmost LED will be flashing green. For example, if the SP
was set to 200 cm/s, the flashing labeled '0' would indicate that
the flow was below 180 cm/s. This would be shown if no flow
through chiller or lowered than desired flow.
Figure 72: Display for Flow Below Range
Flow above display range: The SP LED will be lit amber, all
LEDs to the left and right of the SP LED will be green with the
rightmost LED flashing green. For example, if the SP was set
to 200 cm/s, the flashing LED labeled '9' would indicate that
the flow was above 230 cm/s. This may be a normal display
depending on range by which flow varies through chiller.
Figure 73: Display for Flow Above Range
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TarTup and aInTenanCe
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