Lubrication; Cooling Section Maintenance; Replacement Parts; Troubleshooting - Trane Oxbox 14 Seer Series Installation Instructions Manual

The manufacturer recommends that a qualified installer, service
agency or the gas suppler visually inspect the burner flames for the
desired flame appearance at the beginning of the heating season and
approximately midway in heating season.
The manufacturer also recommends that a qualified installer, service
agency or the gas supplier clean the flame sensor with steel wool at
the beginning of the heating season.
WARNING
Disconnect main electrical power to the unit before attempting
maintenance. Failure to do so may result in electrical shock or
severe personal injury or death.

7.3 LUBRICATION

IMPORTANT: DO NOT attempt to lubricate the bearings on the blower
motor or the induced draft blower motor. Addition of lubricants can
reduce the motor life and void the warranty.
The blower motor and induced draft blower motor are prelubricated by
the manufacturer and do not require further attention.
A qualified installer, service agency or the gas supplier must
periodically clean the motors to prevent the possibility of overheating
due to an accumulation of dust and dirt on the windings or on the
motor exterior. And, as suggested elsewhere in these instruct ions,
the air filters should be kept clean because dirty filters can restrict air
flow and the motor depends upon sufficient air flowing across and
through it to prevent overheating.

7.4 COOLING SECTION MAINTENANCE

It is recommended that at the beginning of each cooling season a
qualified installer or service agency inspect and clean the cooling
section of this unit. The following areas should be addressed:
evaporator coil, condenser coil, condenser fan motor and venturi
area.
To inspect the evaporator coil:
1. Remove the filter access panel and the blower/evaporator coil
access panel.
WARNING
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation
resulting in fire ,electrical shock, property damage, personal
injury or death.
2. Unplug the wires from the circulating air blower and the limit control.
Remove the two screws and slide the blower out of the unit
sideways.
3. Shine a flashlight on the evaporator coil (both sides) and inspect for
accumulation of lint, insulation, etc.
4. If coil requires cleaning, follow the steps shown below.
Cleaning Condenser Coil
1. Remove screws from condenser fan grille assembly and lay grille
over on the unit top panel.
2. Remove the controls access panel and the control box cover.
3. Disconnect the outdoor fan motor wiring from the compressor
contactor and capacitor. Remove the strain relief in the bulkhead
and pull the fan motor wires through. Set grille assembly to the
side.
4. Remove the screws that secure the unit top to the unit. Remove the
top and set the unit top to the side.
5. The coil should be cleaned when it is dry. If the coil is coated with
dirt or lint, vacuum it with a soft brush attachment. Be careful not to
bend the coil fins.
6. If the coil is coated with oil or grease, clean it with a mild
detergent-and-water solution. Rinse the coil thoroughly with water.
IMPORTANT: Do not use excessive water pressure. Excessive
water pressure can bend the fins and tubing of the coil and lead to
inadequate unit performance. Be careful not to splash water
excessively into unit.
7. Go to next section for cleaning the evaporator coil.
Cleaning Evaporator
Condensate Drain, Condenser Fan, Circulation
Air Blower and Venturi
1. Remove the screws from the filter access panel and the
blower/evaporator coil access panel from the unit. Remove the
filter access panel and the blower/evaporator coil access panel.
2. The coil should be cleaned when it is dry. If the coil is coated with
dirt or lint, vacuum it with a soft brush attachment. Be careful not to
bend the Coil fins.
3. If the coil is coated with oil or grease, clean it with a mild
detergent-and-water solution. Rinse the coil thoroughly with water.
IMPORTANT: Do not use excessive water pressure. Excessive
water pressure can bend the tins and tubing of the coil and lead to
inadequate unit performance. Be careful not to splash water
excessively into unit.
4. Inspect the drain pan and condensate drain at the same time the
evaporator coil is checked. Clean the drain pan by flushing with
water and removing any matters of obstructions which may be
present.
5. Flush the drain tube with water. If the drain tube is blocked, it can
usually be cleared with high pressure water.
6. The venturi should also be inspected for items of obstruction such
as collections of grass, dirt or spider webs. Remove any that are
present.
7. Inspect the circulating air blower wheel and motor for accumulation
of lint, dirt or other obstruction and clean if necessary. Inspect the
blower motor mounts and the blower housing for loose mounts or
other damage. Repair or replace it necessary.
Re-assembly
1. Place the condenser coil protective grille back on unit and replace
all screws.
2. Place top panel back on unit and replace all screws.
3. Set condenser fan grille assembly on top of the unit with the fan on
top and the motor wires on the venturi side. Run the fan motor
wires through the bulkhead and pull wires through the hole on the
bottom of the control box on the left side and into the control box.
Reconnect fan motor wires per the wiring diagram attached to the
back of the control box cover.
4. Replace wire strain relief in bulkhead after the slack is pulled out of
the wires on the fan side. This will assure wires will not be
damaged by the fan during unit operation.
5. Turn the condenser fan grille assembly over and into the recess in
the unit top. Secure the grille to the unit with the four long #8
screws removed earlier.
6. Replace the circulating air blower, making sure that all wires are
properly reconnected per the unit wiring diagram.
7. Replace the filter and blower/evaporator coil access panels.
8. Replace the control box cover and controls access panel.
9. Restore electrical power to the unit and check for proper operation,
especially the condenser fan motor.

7.5 REPLACEMENT PARTS

Contact your local distributor for a complete parts list.
7.6 TROUBLE SHOOTING
Refer to Troubleshooting Chart included in this manual.

7.7 WIRING DIAGRAMS

Refer to the appropriate wiring diagram included in this manual.

7.8 CHARGING

Refer to the appropriate charge chart included in this manual.

7.9 BLOWER MOTOR SPEED TAPS

After determining necessary CFM and speed tap data, follow the
steps below to change speeds.
1. Remove control door.
2. Please refer to the Table 10-1 & Table 10-2 and wiring diagram for
the proper location of the wire on the speed tap block of the indoor
blower motor to obtain the speed you have chosen.
3. After adjusting the wires accordingly,replace control door.
Coil, Drain Pan,
installation & owner's manual
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