Technical Guide

718446-YTG-B-0113
8 Johnson Controls Unitary Products
DNX024-048 Two Stage Gas Heat
Component
Models
DNX024 DNX036 DNX048
Nominal Tonnage 2.0 3.0 4.0
AHRI COOLING PERFORMANCE
Gross Capacity @ AHRI A point
(Btu)
24.6 38.4 50.0
AHRI net capacity (Btu) 24.0 37.0 48.0
EER 11.5 12.3 11.2
SEER 15.0 16.5 15.0
Nominal CFM 800 1275 1550
System power (KW) 2.1 3.0 4.3
Refrigerant type R-410A R-410A R-410A
Refrigerant charge (lb-oz) 7-8 9-12 9-8
AHRI HEATING PERFORMANCE
Heating model D056 D090 D090 D110
Heat input (K Btu) 70/45.5 108/70.2 108/70.2 135/87.8
Heat output (K Btu) 56/36.4 87/56.2 87/56.2 108/70.2
AFUE % 80.0 80.0 80.0 80.0
No. burners 3 4 4 5
No. stages 2 2 2 2
Temperature Rise Range (ºF) 30-60 45-75 35-65 45-75
Max. Outlet Air Temp (ºF) 175 175 175 175
Gas Limit Setting (ºF) 160 175 170 160
Gas piping connection (in.) 1/2 1/2 1/2
DIMENSIONS (inches)
Length 49 1/8 49 1/8 49 1/8
Width 47 1/4 47 1/4 47 1/4
Height 33 1/2 41 1/2 41 1/2
OPERATING WT. (lbs.) 440 480 500
COMPRESSORS
Type Scroll 2-spd Scroll 2-spd Scroll 2-spd
Quantity 1 1 1
CONDENSER COIL DATA
Face area (Sq. Ft.) 11.7 14.7 14.7
Rows 2 2 2
Fins per inch 20 20 20
Tube diameter (in.) 3/8 3/8 3/8
Circuitry Type Interlaced Interlaced Interlaced
EVAPORATOR COIL DATA
Face area (Sq. Ft.) 3.4 4.4 4.4
Rows 2 3 3
Fins per inch 15 16 16
Tube diameter 3/8 3/8 3/8
Circuitry Type Interlaced Interlaced Interlaced
Refrigerant control TXV TXV TXV
CONDENSER FAN DATA
Quantity 1 1 1
Fan diameter (Inch) 22 22 22
Type Prop Prop Prop
Drive type Direct Direct Direct
No. speeds 1 2 2
Number of motors 1 1 1
Motor HP each 1/4 1/3 1/3
RPM 1100 900/1100 900/1100
Nominal total CFM 2400 2400 3000
DIRECT DRIVE EVAP FAN DATA
Quantity 1 1 1
Fan Size (Inch) 10 x 8 11 x 10 11 x 10
Type Centrifugal Centrifugal Centrifugal
Motor HP each 1/2 1 1
RPM Variable Variable Variable
Frame size 48 48 48
FILTERS
Quantity - Size 1 - 20 x 20 x 1 2 - 20 x 12 x 1 2 - 20 x 12 x 1