Technical Guide

718432-YTG-D-0313
8 Johnson Controls Unitary Products
DEX Physical Data
Component
Models
DEX024 DEX030 DEX036 DEX042 DEX048
Nominal Tonnage 2.0 2.5 3.0 3.5 4.0
AHRI COOLING PERFORMANCE
Gross Capacity @ AHRI A point (MBH) 23.5 29.2 36.8 44.5 50.8
AHRI net capacity (MBH) 23.2 28.6 36.0 43.5 49.0
EER 12.35 12.25 12.3 12.3 12.3
SEER 15.1 15.2 15.2 15.4 15.2
Nominal CFM 800 1000 1150 1400 1600
System power (KW) 1.9 2.3 2.9 3.5 4.0
Refrigerant type R-410A R-410A R-410A R-410A R-410A
Refrigerant charge (lb-oz) 5-0 8-0 8-0 7-8 10-0
DIMENSIONS (inches)
Length 49 1/8 49 1/8 49 1/8 49 1/8 49 1/8
Width 47 1/4 47 1/4 47 1/4 47 1/4 47 1/4
Height 33 1/2 33 1/2 33 1/2 41 1/2 41 1/2
OPERATING WT. (lbs.)
Unit Weight (lbs.) 355 390 400 410 440
COMPRESSOR
Type Scroll 2-spd Scroll 2-spd Scroll 2-spd Scroll 2-spd Scroll 2-spd
CONDENSER COIL DATA
Face area (Sq. Ft.) 11.7 11.7 11.7 16.4 16.4
Rows 1 2 2 1 2
Fins per inch 20 20 20 20 20
Tube diameter (in.) 3/8 3/8 3/8 3/8 3/8
Circuitry Type Interlaced Interlaced Interlaced Interlaced Interlaced
EVAPORATOR COIL DATA
Face area (Sq. Ft.) 4.38 4.38 4.38 5.63 5.63
Rows 2 2 3 3 3
Fins per inch 15 15 15 16 16
Tube diameter 3/8 3/8 3/8 3/8 3/8
Circuitry Type Interlaced Interlaced Interlaced Interlaced Interlaced
Refrigerant control TX Valve TX Valve TX Valve TX Valve TX Valve
CONDENSER FAN DATA
Fan diameter (Inch) 22 22 22 22 22
Type Prop. Prop. Prop. Prop. Prop.
Drive type Direct Direct Direct Direct Direct
No. speeds 1 1 1 1 1
Motor HP 1/4 1/4 1/4 1/4 1/3
RPM 850 850 850 1100 1100
Nominal total CFM 1800 1800 2400 3000 3000
DIRECT DRIVE EVAP FAN DATA
Fan Size (Inch) 10 x 8 10 x 8 10 x 8 11 x 10 11 x 10
Type Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal
No. speeds 2 2 2 2 2
Motor HP 1/2 1/2 1/2 3/4 3/4
RPM Variable Variable Variable Variable Variable
Frame size 48 48 48 48 48
FILTERS
Quantity - Size 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1 2 - 22 x 14 x 1