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HONEYWELL SMARTVFD THREE CONTACTOR BYPASS ASSEMBLIES
3. Refer to SmartVFD user manual "Specification for
Wiring Terminals" for proper power and control wire
sizing information.
4. Terminate input three phase power wiring to line side of
main fused disconnect. Refer to bypass panel
schematic.
5. Terminate three phase motor wiring to motor terminals
"T1", "T2", "T3". Refer to bypass panel schematic.
6. Terminate VFD control wiring to proper terminal in
bypass panel. Refer to bypass panel schematic.
7. If equipped with Auto bypass, leave jumper J2 on
bypass panel terminals 4 & 5 for auto bypass operation.
Remove jumper J2 for manual bypass operation.
8. Leave jumper J1 on bypass panel terminals 1 & 3 if fire/
smoke/safety shutdown is not uses. If this shutdown is
used, remove jumper J1 and terminate to bypass panel
terminals 1 & 3.
9. Refer to schematic for typical wiring.
10. IMPORTANT: Use only copper wire with 167
minimum.
OPERATION
1. Make sure bypass panel and motor are properly
grounded
2. Make sure all connection points are tight, including all
bypass panel connection points.
3. Make sure all safeties (customer option) are connected
and in working order.
4. Double check correct voltage is being applied and
power and motor wiring are terminated in the correct
place.
5. Verify motor FLA does not exceed VFD output amp
rating and bypass starter overload relay setting dial.
6. Set bypass starter overload relay adjustment dial to
motor FLA.
7. Verify building automation system is ready for start,
stop, speed command; all wires are terminated in the
correct location.
8. Make sure all personnel, debris, etc are clear.
Before applying power, verify main input disconnect
handle is in the "OFF" position; "Bypass/Off/Test/VFD"
selector switch is in the "OFF" position.
1. Apply input power, check three phase voltage on line
side of main disconnect switch.
2. Turn main disconnect handle to "ON" position.
3. Turn "Bypass/Off/Test/VFD" selector switch to "Test"
position. Enter all appropriate parameters in "Startup
Wizard" and all motor nameplate data. See SmartVFD
manuals.
4. Turn "Bypass/Off/Test/VFD" selector switch to "VFD"
position. Press "LOC/REM" button and program correct
parameters for local (keypad) control. See SmartVFD
manuals. Check motor rotation.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
(1)
5. Turn "Bypass/Off/Test/VFD" selector switch to "Off"
position. Wait for motor to stop. Turn selector switch to
"Bypass" position then back to "Off" position. Do not
leave the motor running in "Bypass" position. Check
motor rotation.
(1)
°
°
F (75
C)
Bypass panel "Bypass/Off/Test/VFD" selector switch has
four operating positions:
1. VFD: Device directs power to VFD first, then to the
motor. VFD controls the motor as it would without the
bypass panel.
2. OFF: Device stops power. Power reaches neither the
motor nor the VFD.
3. TEST: Device directs power to VFD only. This allows for
VFD calibration, adjustments, and diagnostics.
4. BYPASS: Device directs power to motor only. No power
reaches the VFD. The motor operates at full speed with
full power.
AUTO BYPASS EQUIPPED
1. AUTO BYPASS CONTROL: Bypass panel will
automatically switch motor over to bypass starter if VFD
faults. Bypass can also be selected remotely via contact
closure on bypass panel terminals 6 & 7. Jumper J2 on
bypass panel terminals 4 & 5 must remain in place for
auto bypass operation. Removing jumper J2 sets
bypass panel to: "Manual Bypass" – will not
automatically switch to bypass upon a VFD fault.
Bypass would need to be selected by turning "Bypass/
Off/Test/VFD" selector switch to "Bypass" position.
2. VFD is pre-programmed at bypass manufacturing
facility for "Auto Bypass" operation.
® U.S. Registered Trademark
© 2012 Honeywell International Inc.
62-2028—01
M.S. 02-12
Printed in United States
If motor is rotating backwards in VFD mode,
shut down power, lock out power source, wait
until VFD stored energy has dissipated, switch
incoming motor wires on the "T1" and "T2"
terminals in the bypass panel, or motor wires
"T1" and "T2" in the motor junction box. Re-
energize power and check rotation again.
If motor is rotating backwards in Bypass
mode, shut down power, lock out power source,
test incoming voltage on incoming line power
wiring to line side of main disconnect switch.
Once it is established that power is shut down,
swap incoming wires on "L1" and "L2" of main
disconnect switch. Re-energize power and check
rotation again.
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