Technical Guide
718445-YTG-A-0811
8 Johnson Controls Unitary Products
* Rating established with a “Wire Form” coil guard which ships as standard.
DNQ024-060 Two Stage Gas Heat
Component
Models
DNQ024 DNQ030 DNQ036 DNQ042 DNQ048 DNQ060
Nominal Tonnage 2.0 2.5 3.0 3.5 4.0 5.0
ARI COOLING PERFORMANCE
Gross Capacity @ ARI A point (MBh) 24.0 29.8 35.7 43.5 49.6 56.8*
ARI net capacity (MBh) 23.5 29.0 34.5 42.0 48.0 55.0*
EER 12.0 12.0 12.0 12.0 12.0 12.0*
SEER 14.0 14.0 14.0 14.0 14.0 14.0*
Nominal CFM 800 900 1100 1400 1500 1550
System power (KW) 2.0 2.4 2.9 3.5 4.0 4.6
Refrigerant type R-410A R-410A R-410A R-410A R-410A R-410A
Refrigerant charge (lb-oz) 3-8 3-2 3-10 4-8 4-6 5-15
ARI HEATING PERFORMANCE
Heating model D056 D056 D056 D072 D090 D090 D110 D090 D110
Heat input (K Btu) 70/45.5 70/45.5 70/45.5 90/58.5 108/70.2 108/70.2 135/87.8 108/70.2 135/87.8
Heat output (K Btu) 56/36.4 56/36.4 56/36.4 72/46.8 87/56.2 87/56.2 108/70.2 87/56.2 108/70.2
AFUE % 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0 80.0
Steady state efficiency (%) 80 80 80 80 80 80 80 80 80
No. burners 3 3 3 4 4 4 5 4 5
No. stages 2 2 22 2 2222
Temperature Rise Range (ºF) 30-60 30-60 25-55 30-60 45-75 35-65 45-75 35-65 45-75
Gas Limit Setting (ºF) 160 160 160 160 175 175 170 175 170
Gas piping connection (in.) 1/2 1/2 1/2 1/2 1/2 1/2
DIMENSIONS (inches)
Length 49 1/8 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 47 1/4
Height 33 1/2 33 1/2 33 1/2 41 1/2 41 1/2 41 1/2
OPERATING WT. (lbs.) 390 425 430 485 490 530
COMPRESSORS
Type Recip 1-spd Scroll 1-spd Scroll 1-spd Scroll 1-spd Scroll 1-spd Scroll 1-spd
Quantity 1 1 1 1 1 1
CONDENSER COIL DATA
Face area (Sq. Ft.) 7.9 11.9 11.9 15 15 15
Rows 1 1 111 1
Fins per inch 23 23 23 23 23 23
Tube diameter (in./MM) 0.71/18 0.71/18 0.71/18 0.71/18 0.71/18 0.98/25
Circuitry Type 2-pass Micro-Channel
EVAPORATOR COIL DATA
Face area (Sq. Ft.) 3.4 3.4 3.4 4.4 4.4 4.4
Rows 2 3 333 4
Fins per inch 15 13 13 16 16 13
Tube diameter 3/8 3/8 3/8 3/8 3/8 3/8
Circuitry Type Interlaced Interlaced Interlaced Interlaced Interlaced Interlaced
Refrigerant control TXV TXV TXV TXV TXV TXV
CONDENSER FAN DATA
Quantity 1 1 1 1 1 1
Fan diameter (Inch) 22 22 22 22 22 22
Type Prop Prop Prop Prop Prop Prop
Drive type Direct Direct Direct Direct Direct Direct
No. speeds 1 1 1 1 1 1
Number of motors 1 1 1 1 1 1
Motor HP each 1/4 1/4 1/4 1/3 1/3 1/3
RPM 1100 1100 1100 1100 1100 1100
Nominal total CFM 2400 2400 2400 3200 3200 3200
DIRECT DRIVE EVAP FAN DATA
Quantity 1 1 1 1 1 1
Fan Size (Inch) 10 x 8 10 x 8 11 x 10 12 x 11 12 x 11 12 x 11
Type Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal
Motor HP each 1/2 3/4 3/4 3/4 1 1
RPM Variable Variable Variable Variable Variable Variable
Frame size 48 48 48 48 48 48
FILTERS
Quantity - Size 1 - 20 x 20 x 1 1 - 20 x 20 x 1 1 - 20 x 20 x 1 2 - 20 x 12 x 1 2 - 20 x 12 x 1 2 - 20 x 12 x 1