2The coil is protected with anenhanced coil guard. With spacing of3/8 in. and construction of coated 12gage wire, the guard helps to protectfrom inclement weather (hail),vandalism, and incidental damage.Totally Enclosed Fan Motor — Meansgreater reliability under adverse weatherconditions and dependable performancefor many years. The permanent-split-capacitor type motor was designed foroptimum efficiency. The motor wastested and qualified under extremeconditions to ensure the greatestreliability.Unit Design — Copper tube andenhanced aluminum fin coil are designedfor optimum heat transfer. Vertical airdischarge carries sound and hotcondenser air up and away from adjacentpatio areas and foliage. Heat pump styledrain pan allows for easy removal ofwater, dirt and leaves.Application Versatility — The 38TUAcan be combined with a wide variety ofevaporator coils and blower packages toprovide quiet, dependable comfort. Unitcan be installed on a roof or at groundlevel.External Service Valves — Both servicevalves are brass, back seating type withsweat connections. Valves are externallylocated so refrigerant tube connectionscan be made quickly and easily. Eachvalve has a service port for ease ofchecking operating refrigerant pressures.Easy Serviceability — One accesspanel provides access to electricalcontrol box and compressor. Removal ofwire dome gives access to fan motor andremoval of the top gives access to thecoil. All models are equipped with acompressor terminal plug.Pressure Switches — All units areequipped with high and low pressureswitches.Additional Compressor Protection—Each compressor is protected withinternal temperature- and current-sensitive overloads.Safety — All units are designed andmanufactured in accordance withUnderwriters Laboratories (UL 1995)safety standard for heating and coolingequipment.Standard Features — All units areequipped with the Tech 2000 SilencerSystem consisting of energy efficient fanand motor, advanced sound hood, andcompressor vibration isolator plate.Units are also equipped with high- andlow-pressure switches and a crankcaseheater.3-Phase Monitor Board — Controlboard that monitors the electrical phaseand prevents operation if wiredincorrectly.Model number nomenclature38TUA 024Deluxe Split-System Air ConditionerNominal Capacity024 — 24,000 Btuh (7.0 Kw) 048 — 48,000 Btuh (14.1 Kw)036 — 36,000 Btuh (10.6 Kw) 060 — 60,000 Btuh (17.6 Kw)7 4 3PackagingSeriesElectrical7 — 230-1-509 — 400-3-50Quality AssuranceREGISTERED QUALITY SYSTEMSystem Design1. Intended for outdoor installation with free air inlet and outlet. Outdoor fan external static pressure available is less than0.01-in. wg.2. Minimum outdoor operating air temperature without low-ambient operation accessory is 55°F (12.8°C).3. Maximum outdoor operating air temperature is 125°F (51.7°C).4. For reliable operation, unit should be level in all horizontal planes.5. Maximum elevation of indoor coil above or below base of outdoor unit is: indoor coil above = 50 ft (15.24m), indoor coilbelow = 150 ft (45.72m).6. For interconnecting refrigerant tube lengths greater than 50 ft (15.24m) or 20 ft (6.1m) vertical differential, consult theResidential Split-System Long-Line Application Guideline available from equipment distributor.7. Crankcase heater required when interconnecting refrigerant tube length exceeds 50 ft (15.24m).8. If any refrigerant tubing is buried, provide a minimum 6 in. (152mm) vertical rise to the valve connections at the unit.Refrigerant tubing lengths up to 36 in. (912mm) may be buried without further consideration. For buried lines longer than3 ft (912mm), consult your local distributor.9. Use only copper wire for electric connection at unit. Aluminum and clad aluminum are not acceptable for the type ofconnector provided.10. Mix-matches of indoor coil capacity more than 1 size larger than outdoor unit capacity may result in inadequate indoorcomfort.11. Do not apply capillary tube indoor coils to these units.