Trane OA1D OA2D OA3D (Indirect Gas-Fired/Electric Heat) Manuel De Maintenance
Installation
28
OAU-SVX01E-EN
Note: All field installed wiring must conform to NEC
guidelines as well as State and Local codes.
Verify that the power supply available is compatible with
the unit’s nameplate ratings. The available supply power
must be within 10 percent of the rated voltage stamped on
the nameplate. Use only copper conductors to connect the
power supply to the unit.
the unit’s nameplate ratings. The available supply power
must be within 10 percent of the rated voltage stamped on
the nameplate. Use only copper conductors to connect the
power supply to the unit.
Main Unit Power
Standard Wiring
The electrical service must be protected from over current
and short circuit conditions in accordance with NEC
requirements. Protection devices must be sized according
to the electrical data on the nameplate.
and short circuit conditions in accordance with NEC
requirements. Protection devices must be sized according
to the electrical data on the nameplate.
1.
Location of the applicable electrical service entrance is
illustrated in
illustrated in
. Complete the unit’s power wiring
connections onto either; the main terminal block HTB1
inside the unit control panel, the factory mounted non-
fused disconnect switch (UCD) or circuit breaker (UCB),
or the electric heat non-fused disconnect switch. Refer
to the customer connection diagram that shipped with
the unit for specific termination points.
inside the unit control panel, the factory mounted non-
fused disconnect switch (UCD) or circuit breaker (UCB),
or the electric heat non-fused disconnect switch. Refer
to the customer connection diagram that shipped with
the unit for specific termination points.
2. Provide proper grounding for the unit in accordance
with local and national codes.
Use the following checklist in conjunction with the
checklist in
checklist in
to ensure
that the unit is properly installed and ready for operation.
Voltage Imbalance
Three phase electrical power to the unit must meet
stringent requirements for the unit to operate properly.
Measure each leg (phase-to-phase) of the power supply.
Each reading must fall within the utilization range stamped
on the unit nameplate. If any of the readings do not fall
stringent requirements for the unit to operate properly.
Measure each leg (phase-to-phase) of the power supply.
Each reading must fall within the utilization range stamped
on the unit nameplate. If any of the readings do not fall
Table 6.
OA3D Unit
MBh
Pipe Connection (in.)
300
3/4
350
1
400
1
500
1
600
1-1/4
700
1-1/4
800
1-1/4
1000
1-1/4
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.
of conductors. Failure to use copper conductors could
result in equipment damage.
WARNING
Proper Field Wiring and Grounding
Required!
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Verify that the correct size and number of filters are in
place.
place.
Inspect the interior of the unit for tools and debris and
install all panels in preparation for starting the unit.
install all panels in preparation for starting the unit.
Check all electrical connections for tightness and
“point of termination” accuracy.
“point of termination” accuracy.
Verify condenser airflow is unobstructed.
Verify that the condenser and indoor fans turn freely
without rubbing and are properly tightened on the
shafts.
without rubbing and are properly tightened on the
shafts.
Check motor mounting bolts and inlet cone for
tightness. Free spin wheel by hand to check for proper
alignment of motor, wheel, and inlet cone. Record
motor nameplate amps at unit-rated voltage.
tightness. Free spin wheel by hand to check for proper
alignment of motor, wheel, and inlet cone. Record
motor nameplate amps at unit-rated voltage.
Check proper indoor fan wheel rotation. Wheel
housing will be marked to indicate direction of proper
rotation.
housing will be marked to indicate direction of proper
rotation.
With access doors closed and secured, operate
blower at 100 percent speed. Check amp readout of
amps output to indoor fan at VFD display to confirm
operation within motor amp capacity.
blower at 100 percent speed. Check amp readout of
amps output to indoor fan at VFD display to confirm
operation within motor amp capacity.
WARNING
Live Electrical Components!
During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.
troubleshooting of this product, it may be necessary to
work with live electrical components. Have a qualified
licensed electrician or other individual who has been
properly trained in handling live electrical components
perform these tasks. Failure to follow all electrical
safety precautions when exposed to live electrical
components could result in death or serious injury.