background image

SERVICE

When servicing unit, shut off all electrical power to the
unit to avoid shock hazard or injury from rotating parts.

Cleaning —

Inspect unit interior at the beginning of each

cooling season and as operating conditions require.
CONDENSER COIL — Inspect coil monthly. Clean con-
denser coil annually and as required by location or outdoor-
air conditions.

Clean coil as follows:

1. Turn off unit power.
2. Remove and save top panel screws on condensing unit.
3. Remove condenser coil corner post. See Fig. 10. To hold

top panel open, place coil corner post between top panel
and side panel. See Fig. 11.

4. Remove bracket holding coil sections together at return

end of condenser coil. Carefully separate the outer coil
section 3 to 4 in. (75 to 100 mm) from the inner coil sec-
tion. See Fig. 12.

5. Use a water hose or other suitable equipment to flush down

between the 2 coil sections to remove dirt and debris. Clean
the outer surfaces with a stiff brush in the normal manner.

6. Reposition the outer coil section, and secure the coil sec-

tions together by reinstalling the brackets removed in
Step 4.

7. Remove the coil corner post from between the top panel

and side panel.

8. Install the coil corner post and replace all screws re-

moved in Step 2.

Lubrication

COMPRESSORS — Each compressor is charged with cor-
rect amount of oil at the factory. For additional information
on 38AKS units, refer to the Oil Charge section on page 10.

FAN MOTOR BEARINGS — Fan motor bearings are of
the permanently-lubricated type. No further lubrication is
required.

Condenser-Fan Adjustment (Fig. 13)

1. Shut off unit power supply.
2. Remove condenser-fan assembly (grille, motor, motor cover,

and fan).

3. Loosen fan hub setscrews.

Fig. 11 — Propping Up Top Panel

Fig. 12 – Separating Coil Sections

NOTE: Fan height adjustments are as follows:

UNIT

in.

mm

38AK007 (60 Hz)
All 50-Hz Units

4.50

114

All 60-Hz Units
(Except 38AK007)

6.42

163

Fig. 13 — Condenser-Fan Adjustment

Fig. 10 — Cleaning Condenser Coil

11

Summary of Contents for 38AK008

Page 1: ...ipment When working on air conditioning equipment observe pre cautions in literature and on tags and labels attached to unit Follow all safety codes Wear safety glasses and work gloves Use quenching c...

Page 2: ...rflow cfm 3800 6500 7000 6500 6500 6500 CONDENSER FAN 50 Hz Propeller Direct Drive Quantity Rpm 1 960 Diameter in 26 Motor Hp NEMA 1 3 Nominal Airflow cfm 3150 5400 5800 5400 5400 5400 CONDENSER COIL...

Page 3: ...3050 CONDENSER FAN 50 Hz Propeller Direct Drive Quantity R s 1 16 0 Diameter mm 660 Motor Hp NEMA 1 3 Nominal Airflow L s 1490 2550 2750 2550 2550 2550 CONDENSER COIL Enhanced Copper Tubes Aluminum L...

Page 4: ...SSOR MOUNTING Compressors are shipped from the factory held down by 4 bolts After unit is installed loosen each bolt until the snubber washer can be moved with finger pressure See Fig 4 Step 3 Complet...

Page 5: ...unit and ungrounded surfaces control box side 36 in 914 per NEC e Between unit and block or concrete walls and other grounded surfaces control box side 42 in 1067 per NEC 5 With the exception of the...

Page 6: ...t of electrical wire connected to unit ground lug in control compartment or conduit approved for elec trical ground when installed in accordance with NEC ANSI American National Standards Institute NFP...

Page 7: ...460 3 60 414 508 19 9 99 1 4 26 3 35 575 3 60 518 632 15 9 79 1 4 21 3 25 220 3 50 198 253 39 7 198 1 4 52 7 70 400 3 50 342 460 19 9 99 1 4 26 3 35 LEGEND CSA Canadian Standards Association FLA Full...

Page 8: ...r post See Fig 7 3 Feed wire through the raceway built into the corner post and into the 24 v thermostat connection board The 24 v thermostat connection is located on the left side of the low voltage...

Page 9: ...Weigh in 7 lb 3 kg of R 22 to start unit CHARGE COOLING Use Cooling Charging Charts Fig 8A or 8B and 9A or 9B Vary refrigerant until the conditions of the chart are met Note that charging charts are d...

Page 10: ...installed in door evaporator fan contactor to function The recom mended field supplied and installed liquid line solenoid valve will also open allowing the system to function in cooling As cooling de...

Page 11: ...o remove dirt and debris Clean the outer surfaces with a stiff brush in the normal manner 6 Reposition the outer coil section and secure the coil sec tions together by reinstalling the brackets remove...

Page 12: ...off power to unit Remove unit access panel front of unit 2 Remove refrigerant from system using refrigerant removal methods described in the Carrier GTAC II Module 5 Charging Recovery Recycling and Re...

Page 13: ...haft Tighten fan hub screws Motor not running Check power and capacitor 1 3 and 3 4 hp motor Motor bearings seized Replace motor Motor overload open Check overload rating Check for fan blade obstructi...

Page 14: ...OL Overload Relay QT Quadruple Terminal TB Terminal Block TDR Time Delay Relay TH Thermostat Heating TRAN Transformer Terminal Marked Terminal Unmarked Terminal Block Factory Wiring Field Power Wiring...

Page 15: ...IGHT Y N HAS CRANKCASE HEATER BEEN ENERGIZED FOR 24 HOURS Y N INDOOR UNIT HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE Y N ARE PROPER AIR FILTERS IN PLACE Y N HAVE FAN AND MOTOR PULLE...

Page 16: ...ENTS OIL PRESSURE 38AKS only SUCTION PRESSURE SUCTION LINE TEMP DISCHARGE PRESSURE DISCHARGE LINE TEMP ENTERING CONDENSER AIR TEMP LEAVING CONDENSER AIR TEMP EVAP ENTERING AIR DB dry bulb TEMP EVAP EN...

Reviews: