Carrier 09DC User Manual download pdf

Carrier

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9AB,09DC

Air-Cooled Condensers

DESCRIPTION

Capacities to 10 Tons

9AB Air-Cooled Condensers available in nominal

capacities of 5, 7% and 10 tons are designed for verti

cal installations with horizontal air flow. They may be

located in any area having unobstructed air circula

tion; the low silhouette permits installation in varied

ground or roof locations. Each unit consists of a direct

drive motor (or motors), fan (or fans), fan guards,

motor mounts, condenser coil with integral subcooling

circuit, wind deflector, and electrical junction box.

Weather Armor* enclosures (which are also provided

for 09DC016) have a baked enamel finish which pro

vides maximum weather protection.

Capacities 15 Tons and Over

09DC Air-Cooled Condensers are available in 15-,

20-, 25-, 30- and 40-ton sizes. The 25-, 30- and 40-ton

sizes are designed for use in multiples to give capacities

of 50, 60 and 80 tons. Each size has three direct drive

fans, three motors and motor mounts, three guards,

a junction box, and a condenser coil with integral sub

cooling circuit. The 20-, 25-, 30- and 40-ton units, all

using vertical air flow, may have 2 or 3 circuits, each

with an integral subcooling circuit. Each circuit may

be used as a separate condenser for a single system.

Double-weight, hot dipped, galvanized steel enclosures

give maximum protection.

FEATURES

• Multiple Fans and Motors provide inexpensive, re

liable system control in intermediate seasons. Standby

protection is provided in case one fan motor fails.

• Subcooling permits greater liquid lift in vertical

risers without liquid flashing. Special coil circuiting

cools liquid refrigerant below the saturated condensing

temperature, extending system capacity without in

creasing motor horsepower.

• Direct Drive Fans require no tensioning device or

pulleys. Alignment problems, belt maintenance, and

friction loss are eliminated.

• Three Types of Head Pressure Control (Accessory)

are available to maintain a refrigeration load by hold-

ing a minimum head pressure and reducing condenser

capacity at low outdoor temperatures.

1. Motormaster Electronic Control (9AB6, 8, 12 and

09DC016, single-phase) modulates condenser fan

motor speed from zero to full rpm.

2. Fan Cycling Control cycles one fan (9AB8, 12) or

two fans (09DC) for control during intermediate

seasons.

3. Head Pressure Control Damper (09DC024, 084),

mounted below unit at the uncontrolled fan section,

further reduces capacity.

• Winter Start Control — Optional package permits

start-up of compressor regardless of low temperatures.

•SINGLE FEATURE SHEET AVAILABLE

Form 9AB, 09DC-2P

1 2 3 4 5 6

Summary of Contents

Page 1 - 9AB,09DC

Carriers io 80 Tons: .¿'K 5:-K , wci"' i/''9AB,09DCAir-Cooled CondensersDESCRIPTIONCapacities to 10 Tons9AB Air-Cooled Con

Page 2 - 1/2-024,028

PHYSICAL DATAUNIT9 AB09DC09DC05409DC06409DC0846 8 12 016024028034 044(T wo 028’s)(Two034*s)(Two044’s)RATING (tons)*6.8 10.5 13.815.822.128.035.8 46.7

Page 3 - Example (Minimum Charge)

CONDENSER RATINGS TYPICAL ARRANGEMENTS(Two-Module Condensers)la. Select minimum or optimum charge ratings.Use optimum charge when compressor, con

Page 4 - — CONDENSER CONTROL

General — Efficient operation of evaporator expansion valves requires a 90 F minimum condensing temperature for 100% compressor capaci

Page 5

SCHEMATIC WIRING —HEAD PRESSURE CONTROL208/230/ i TO fUSED DISCONNECT ТШЙЙОЗТЙТ i i208/230 VTO FUSED DISCONNECTCOMMON FOR ALL WIRINGJiNTERLOCKED [FC

Page 6 - GUIDE SPECIFICATIONS

ELECTRICAL DATA (60-cycle)FANS FLAUNITVOLTSPHASENo.Hp(ea)9AB6208/23011V32 1*9AB8208/23012T otal1V32.1*208/2301/32.49AB12208/2301 2T Ota 11V32.1*208/23

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Carrier 09DC User Manual

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Summary of Contents

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