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C1
Appendix C
Quick Start Guide
YORK Solution AirMod and Curbpak VFD Start-Up Checklist
A. Reference Material
1. AYK550 Installation and Operation Manual, YORK Form
100.41.03 ..........................................................................................
2. Wiring schematic located inside panel door. ...................................
B. Pre-Installation Checks
1. Verify drive model number and nameplate data to what was
ordered. ............................................................................................
2. Verify voltage being applied is the same for:
a. Drive Package ...........................................................................
b. Power Line .................................................................................
c.
Motor being operated by the drive ...........................................
3. Record Motor Data to use in Group 99
a. Voltage: 208, 230, 380, 460 .....................................................
b. Frequency: 50 Hz, 60 Hz ..........................................................
c.
Motor full-load current: _____ FLA .........................................
d. Motor full-load speed: _____ RPM .........................................
e. Motor power (HP x .746) _____ kW or HP .............................
4. Verify the drive output current FLA is equal to or greater than the
motor(s) being driven by it. ...............................................................
5. Check Motor Wiring.
a. A disconnect (if supplied by others) between the drive and motor
should be interlocked to the drives safety interlock to prevent
nuisance tripping. ......................................................................
b. Do not apply power factor correction capacitors be-
tween the drive output and the motor. .....................................
c.
Two-speed motor must be wired permanently for full
speed. ........................................................................................
d. Y-Delta motors must be wired permanently for RUN. .............
e. Part winding motors must be wired permanently for
RUN. ..........................................................................................
f.
Verify all motor lead connections are tight and wire
insulation is not nicked or cut. Loose connections or
cut wire insulation can cause overcurrent or ground
fault trips in the drive. ................................................................
C. Installation Checks
1. Branch circuit protection must be provided for the drive. Drive pack-
age with bypasses that come with an integral main fused discon-
nect are sized to protect the drive package on circuits suitable of
not more than 100,000 amps rms at 480VAC max. ........................
2. Environmental Concerns
a. Clean: Keep construction debris out of drive and/or cabinet.
b. Dry: maximum 95% relative humidity noncondensing ...................
c. Cool: 32
°
F - 104
N3R outdoor weatherproof and have factory cooling provisions
from the AHU). Confirm air flow into cabinet. .............................
d. Elevation: 3300 feet above sea level w/o derate .......................
e. Warm: If the AirMod is to operate below 32
ambient space heater. .................................................................
3. Mounting
a. N1 AirMods are wall-mounted or AHU mounted, vertical
with 4" space required on sides and top for cooling. .......................
b. N3R CurbPaks are AHU factory-mounted for outdoor
applications. .................................................................................
c. Solution styles are AHU factory mounted. .................................
4. Wiring
a. Separate grounded metal conduits must be provided for in
put power, output power, and control wiring. Failure to pro-
vide separate conduits could result in disruption of other elec-
trical devices due to harmonics and RFI/EMI generated by
the drive. ......................................................................................
Appendix C
°
F Ambient temperature. (CurbPak drives are
°
F, install an enclosure
AYK550-UH User's Manual
b. On Solution CurbPak and AirMod drives with bypasses, the
interlock and remote run commands are at 120VAC po-
tential. See wiring diagram in drive enclosure for con-
nection detail. ...............................................................................
c. Use conduit knockouts provided. Avoid metal shavings
in the drive enclosure. .................................................................
d. Protect signal wires from noise. Be sure to use shielded
and properly grounded signal wires. Noisy input signal
wires can cause erratic drive operation. .....................................
e. Ground each drive package individually. ....................................
f. Double check input and output wiring for correct
termination. .................................................................................
g. Double check all electrical connections. Loose wiring can
cause nuisance tripping, over current trips, single phase
trips, and component failure. ......................................................
h. Safeties and remote run command must be wired as indicated
on wiring diagrams. .....................................................................
i. On drive only applications, all connections must be dry
contact connections on the drive logic board. ............................
j. A 0-10VDC or 4-20mA remote speed signal must be
wired onto AI1 and AGND on drive logic board. ....................
k. Configure speed signal using dip switches on logic board. ......
5. Programming
Apply power to drive. ........................................................................
a. Drives are preprogrammed for YORK defaults and the HVAC Hand-
Auto Macro. Only minimal field programming is required. .............
b. Using the soft keys of the Keypad, verify or change as required
the following parameters on page 17. ........................................
6. Operational Test
(Before proceeding, confirm system is safe to run at full speed.)
a. Toggle VFD-OFF-Bypass to VFD. Press HAND Key on AYK550
panel, use the up/down keys to increase speed. Verify rotation
of fan/motor. If fan/motor is running backwards, power down drive
by opening disconnect and change U
leads .............................................................................................
b. Check fan/motor rotation in bypass mode by "bumping" motor using
VFD-OFF-Bypass Switch. If fan/motor is running backwards in
bypass mode, remove power from AirMod by opening disconnect
and change L
and L
at incoming disconnect switch. ...................
1
2
c.
Once rotation has been verified in both VFD mode and Bypass mode,
place the AirMod in VFD mode and verify operation in "HAND AND
AUTO" mode using the AYK keypad. The drive will follow an exter-
nal speed reference when placed in Auto mode and will follow speed
commands from the keypad up/down arrows while in Hand mode.
Use the Hand mode to ramp up the fan/motor to full speed. During
ramp up, check for system vibration or resonant points. See Group
25 to program critical skip frequency. ..............................................
d. At full speed and load, measure drive input voltage and output volt-
age between phases, a voltage balance of less than 5V per phase
is desired. Measure drive input and output current between phases,
a current balance of less than 5% per phase is desired. ...............
e. After the above steps are performed, the drive can be placed in
AUTO mode for normal remote operation. ......................................
and V
at drive output motor
2
2
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