Daikin Magnitude WME Series - Page 54

IOM 1266-2 • MAGNITUDE
®
MODEL WME CHILLERS 54 www.DaikinApplied.com
sTarTup and MaInTenanCe
Table 33: In Step 3, the ‘Teach’ function re-adjusted the ow switch SP while ow was at the minimum desired operating ow. The
chiller will not operate at this ow because the ow switch is OPEN after performing the ‘Teach’ function. The benet 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 ow. The ‘+’ and ‘-’ buttons on the face of the ow switch allow for the manual
adjustment of the SP. Pressing the ‘+’ button reduces the ow setpoint while pressing the ‘-’ button increases the ow setpoint.
Each button press, ‘+’ or ‘-‘, changes the ow setpoint by 2.5 cm/s.
Step 4: Press the ‘+’ button until LED ‘9’ begins to ash, as
shown in Figure 71. Opening of ow switch should now occur
at approximately 80% to 90% of minimum ow.
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 ow 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 ow 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.
Flow below display range: The SP LED will be lit red and
the leftmost LED will be ashing green. For example, if the SP
was set to 200 cm/s, the ashing labeled ‘0’ would indicate that
the ow was below 180 cm/s. This would be shown if no ow
through chiller or lowered than desired ow.
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 ashing green. For example, if the SP was set
to 200 cm/s, the ashing LED labeled ‘9’ would indicate that
the ow was above 230 cm/s. This may be a normal display
depending on range by which ow varies through chiller.
Figure 73: Display for Flow Above Range