Product Data Commercial Split Systems Air Conditioning ...

1 Product Data Commercial Split Systems Air Conditioning Condensing Units 6 to 20 Tons 38 AUZ07,08,12,14 Shown 38 AUZ, AUD 07-25 Single and Dual Circuit Condensing Units with Puron R-410A Refrigerant 2020 Carrier Corporation Form 38AU-7-25-04PD. Features/Benefits These dependable outdoor air cooled non-fused disconnect direct-expansion (DX) coils, a unique condensing units match Carrier's special coil coating coil protection combination of indoor-air quality fea- indoor-air handlers to meet a wide louvered hail guard tures, and is easy to install.

2 Its versatility selection of cooling solutions. and state-of-the-art features help to Efficient operation ensure economical performance of the Carrier's air-cooled air Conditioning Split Systems : These air cooled condensing units will Split system both now and in the future. provide EERs up to (tested in accor- Indoor-air quality (IAQ) features Provide a logical solution for com- dance with AHRI standard 340/360). mercial needs The unique combination of IAQ fea- This high efficiency operation will help tures in the 40 RUA Series air handlers Have rugged, dependable construction reduce overall operating cost and energy Available with single or dual refriger- help to ensure that only clean, fresh, consumption.

3 Conditioned air is delivered to the occu- ant circuits. Have cooling capability up to 125 F Controls for performance pied space. (52 C) ambient and down to 35 F dependability Direct-expansion 4 row cooling coils (2 C) ambient standard The 38AU condensing units offer prevent the build-up of humidity in the operating controls and components room, even during part-load conditions. Constructed for long life designed for performance dependabil- Standard 2-in. (51mm) disposable fil- The 38 AUZ single circuit and 38 AUD ity.

4 The high efficiency hermetic scroll ters remove dust and airborne parti- dual circuit, air cooled condensing units compressor is engineered for long life cles from the occupied space for are designed and built to last. The high and durability. The compressors cleaner air. efficient designed outdoor coil con- include vibration isolation for quiet struction allows for a more efficient operation. The high-pressure switch The pitched, non-corroding drain pan design in a smaller cabinet size that uti- protects the entire refrigeration system can be adjusted for a right-hand or left- lizes an overall reduction in refrigerant from abnormally high operating pres- hand connection to suit many applica- charge.

5 Where conditions require, spe- sures. A low-pressure switch protects tions and provide positive drainage and cial coil coating coil protection option the system from loss of charge. These prevent standing condensate. is available. Cabinets are constructed of units also include anti-short-cycling The accessory economizer can pro- prepainted galvanized steel, delivering protection, which helps to protect the vide ventilation air to improve indoor- unparalleled protection from the envi- units against compressor failure. air quality by using demand control ronment.

6 Inside and outside surfaces ventilation. When used in conjunction All units include a crankcase heater to are protected to ensure long life, good with Carrier Comfort System and CO2. eliminate liquid slugging at start-up. Each sensors, the economizer admits fresh looks, and reliable operation. Safety unit comes standard with the Comfort controls are used for enhanced system outdoor air to replace stale, recircu- Alert control system. This provides: lated indoor air. protection and reliability. Each unit uti- lizes the Comfort Alert diagnostic System Go LED indicator Fault LED indicator Economy and troubleshoot control system.

7 This The 40 RUA Series packaged air protects the units operation and pro- Compressor fault LED indicator Phase loss protection handlers provide reduced installation vides valuable diagnostic information expense and energy-efficient when required. Phase reversal protection performance. Factory-installed options Safety pressure indicator Anti-short cycle protection Quick installation is ensured by the (FIOPs) multipoise design. Units can be Certified and pre-engineered factory- Innovative Carrier 40 RUA packaged installed in either the horizontal or ver- installed options (FIOPs) allow units to air handlers are custom matched to tical configuration without modifica- be installed in less time, thereby reduc- 38 AUZ/D condensing units.

8 Tions. Fan motors and contactors are ing installed cost. Information on matching 40 RUA DX pre-wired and thermostatic expansion FIOPs include: packaged air handler follows for conve- valves (TXVs) are factory-installed on nience. See separate Product data for all 40 RUA models. low ambient controls which provide more details. The 40 RUA Series has High efficiency, precision-balanced cooling operation down to 20 F excellent fan performance, efficient ( 29 C) ambient temperatures fans minimize air turbulence, surging, and unbalanced operation, cutting operation expenses.

9 Table of contents The economizer accessory precisely controls the blend of outdoor air and room air to achieve comfort levels. Features/Benefits .. 2 When the outside air enthalpy is suit- Model Number Nomenclature .. 4 able, outside air dampers can fully AHRI Capacity Ratings .. 5 open to provide free cooling without Physical Data .. 6 energizing mechanical cooling. Base Unit Dimensions.. 10 Rugged dependability Options and Accessories .. 17 The 40 RUA series units are made to Typical Piping and Wiring Diagrams .. 20 last.

10 The die-formed galvanized steel Performance Data .. 27 panels ensure structural integrity under Electrical Data .. 52 all operating conditions. Galvanized Application Data .. 55 steel fan housings are securely mounted Guide Specifications .. 56 to a die-formed galvanized steel fan 2. deck. Rugged pillow-block bearings diameter copper tubes mechanically from horizontal to vertical operation by (40 RUA14) are securely fastened to the bonded to aluminum sine-wave fins. The simply repositioning the unit. Drain solid steel fan shaft with Split collets and coils include matched, factory-installed pan connections are duplicated on clamp locking devices.