Daikin DRG0361DL00001S, Service Instructions Manual

Page: 36 / 113

36
SYSTEM OPERATION
Three Phase Models Only
HOW TO USE THE FORMULA:
EXAMPLE: Line to neutral voltage of 220, 216, and 213
1) Average Voltage = 220 + 216 + 213 = 649 / 3 = 216
2) Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4
Percent voltage unbalance MUST NOT exceed 2%.
3) Percent Voltage Unbalance = 100 x = = 1.8%
4
216
400
216
3) PERCENT VOLTAGE
UNBALANCE
2) MAXIMUM VOLTAGE DEVIATIONS
FROM AVERAGE VOLTAGE
1) AVERAGE VOLTAGE
= 100 x
AIR FLOW ADJUSTMENTS
When the final adjustments are complete, the current
draw of the motor should be checked and compared to
the full load current rating of the motor. The amperage
must not exceed the service factor stamped on the motor
nameplate. The total airflow must not be less than that
required for operation of the furnace.
If an economizer is installed, check the unit operating
balance with the economizer at full outside air and at
minimum outside air.
NOTE: Never run high stage CFM below 300 CFM per ton
evaporator freezing or poor unit performance is possible.
Standard Static Drive Motor
Adjust the CFM for the unit by changing the position of
the low voltage leads on the terminal block TB1. Refer to
Appendix A for blower performance at each speed tap.
Refer to Appendix D for maximum and minimum allowed
airflow for heating and cooling.
Fan speed for G (GR), is fixed at TB1-T1 and cannot be moved.
Low Cool Y1, Yellow (YL) is movable and set to TB1-T1
Low Heat W1, White (WH) is movable and set to TB1-T2
High Cool Y2, Purple (PU) is movable and set to TB1-T3
High Heat W2, Brown (BR) is movable and set to TB1-T3
These wires can be moved together or separately and placed on any
unoccupied terminal.
NOTE: YL can be moved to taps T2-T3 as long as YL does
not share the tap with PU. WH can be moved to tap T3 as
long as WH does not share the tap with BR.
Purple wire Y2 (High Cool) and Brown wire W2 (High
Heat) are connected to TB1-T3. These wires can be moved
together or separately and placed on unoccupied terminal
T4 or T5.
High Static Drive Motor
These motors offer a higher flexibility in making airflow
adjustments. Depending on the application the motor
is set up to use motor speed taps T1 to T5 or T6 to T10.
When heat is called speed taps T6 to T10 take the place
of speed taps T1 to T5. Refer to Appendix A for blower
performance at each speed tap. Refer to Appendix D for
minimum and maximum airflow required for heating and
cooling.
Fan speed for G (GR), is fixed at TB1-T1 and cannot be
moved.
Low Cool Y1, Yellow (YL) is movable and set to TB1-T1
Low Heat W1, White (WH) is movable and set to TB1-T6
High Cool Y2, Purple (PU) is movable and set to TB1-T3
High Heat W2, Brown (BR) is movable and set to TB1-T8
These wires can be moved together or separately and
placed on any unoccupied terminal.
Note: YL can be moved to taps T2 to T3 as long as YL does
not share the tap with PU. WH can be moved to tap T7 as
long as WH does not share the tap with BR. When Heat is
called TB1-W1 will also call TB1-DH, activating the second
set of taps T6 to T10. If cooling and heating is called at the
same time heating will take priority and taps T6 to T10
will be chosen by default.
NOTE: If more than one lead is energized simultaneously,
the motor will run at the higher numerical speed tap for
both standard static and high static drive motors. For
proper operation Y2 and W2 should have a higher speed
setting than G, Y1 and W1 for both standard static and
high static drive motors.
For gas heat units, the airflow must be adjusted so that the
air temperature rise falls within the ranges given stated on
Data Plate.