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279550-YIM-A-0207

Unitary Products Group

27

Adjustment of Temperature Rise

After about 20 minutes of high heat operation, determine the 
furnace temperature rise. Take readings of both the return air 
and the heated air in the ducts about six feet from the furnace 
where they will not be affected by radiant heat.

The temperature rise (or temperature difference between the 
return air and the heated air from the furnace) must lie within 
the range shown on the rating plate and the data in Tables 9 
and 11.

After the temperature rise has been determined, the CFM can 
be calculated as follows:

Direct Drive Blower

All units have direct drive, constant CFM blower motors.

Checking Gas Heat Input

Natural Gas

1.

Turn off all other gas appliances connected to the gas meter.

2.

With the furnace turned on, measure the time needed for 
one revolution of the hand on the smallest dial on the 
meter. A typical gas meter usually has a 1/2 or a 1 cubic 
foot test dial.

3.

Using the number of seconds for each revolution and the 
size of the test dial increment, find the cubic feet of gas 
consumed per hour from Table 19.

If the actual input is not within 5% of the furnace rating with 
allowance being made for the permissible range of the regulator 
setting, replace the orifice spuds with spuds of the proper size.

NOTE: 

To find the BTU input, multiply the number of cubic feet 
of gas consumed per hour by the BTU content of the gas 
in your particular locality. (Contact your gas company for 
this information since it varies widely from city to city.)

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Table 19: Gas Rate Cubic Feet Per Hour

1

1.

EXAMPLE

: By actual measurement, it takes 38 seconds for the 

hand on the 1-cubic foot dial to make a revolution with just a 
100,000 BTUH furnace running. Using this information, locate 
38 seconds in the first column of Table 19. Read across to the 
column headed “1 Cubic Foot,” where you will see that 95 cubic 
feet of gas per hour are consumed by the furnace at that rate. 
Multiply 95 x 1050 (the BTU rating of the gas obtained from the 
local gas company). The result is 99,750 BTUH, which is close 
to the 100,000 BTUH rating of the furnace.

Seconds for

One Rev.

Size of Test Dial

1/2 cu. ft.

1 cu. ft.

10

180

360

12

150

300

14

129

257

16

113

225

18

100

200

20

90

180

22

82

164

24

75

150

26

69

138

28

64

129

30

60

120

32

56

113

34

53

106

36

50

100

38

47

95

40

45

90

42

43

86

44

41

82

46

39

78

48

37

75

50

36

72

52

35

69

54

34

67

56

32

64

58

31

62

60

30

60

Summary of Contents for AFFINITY DNX024

Page 1: ...e Gas Heat 10 8 Typical Field Control Wiring Diagram Single Stage Thermostat Two Stage Gas Heat 11 9 Typical Field Control Wiring Diagram Two Stage Thermostat Single Stage Gas Heat 11 10 Typical Field...

Page 2: ...chanical codes Before performing service or maintenance operations on unit turn off main power switch to unit Electrical shock could cause personal injury Improper installation adjustment alteration s...

Page 3: ...lectrical Code ANSI NFPA No 70 Latest Edition 2 National Fuel Gas Code ANSI Z223 1 Latest Edition 3 Gas Fired Central Furnace Standard ANSI Z21 47a Latest Edition 4 Local building codes and 5 Local ga...

Page 4: ...ent Location Direct Drive Condenser Fan Motor Highly Efficient Enhanced Copper Tube Aluminum Fin Evaporator Coil Highly Efficient Enhanced Copper Tube Aluminum Fin Condenser Coil Decorative Protective...

Page 5: ...d proper unit operation Rigging And Handling Exercise care when moving the unit Do not remove any packaging until the unit is near the place of installation Rig the unit by attaching chain or cable sl...

Page 6: ...ensions Size Tons Weight lbs Center of Gravity 4 Point Load Location lbs Shipping Operating X Y A B C D 024 2 0 445 440 20 24 5 127 93 93 127 036 3 0 445 440 20 24 25 126 91 93 129 048 4 0 505 500 20...

Page 7: ...A B 024 33 1 2 18 1 4 036 048 41 1 2 23 1 8 Table 5 Unit Clearances1 2 1 A 1 clearance must be provided between any combustible material and the supply air duct work 2 The products of combustion must...

Page 8: ...Figure 4 Dimensions Front and Bottom Figure 5 Dimensions Back and Bottom 5217 6 6833 12 287 137 211 7 21 2 92 7 211 12 287 21 16 7 5 1 137 92 7 211 12 287 6 5 7851 5 23 1 1 27720 5 7851 5 23 1 1 2772...

Page 9: ...r information concerning rear and bottom supply and return air duct openings Roof Curb On applications when a roof curb is used the unit must be positioned on the curb so the front of the unit is tigh...

Page 10: ...6 The wiring entering the cabinet must be provided with mechanical strain relief A fused disconnect switch should be field provided for the unit If any of the wire supplied with the unit must be repl...

Page 11: ...WG wire should be used for all field installed 24 volt wire PROGRAMMABLE THERMOSTAT ONLY SINGLE STAGE THERMOSTAT UNIT CONTROL BOARD TERMINAL STRIP 24 VOLT TRANSFORMER NOTE HEAT ANTICIPATOR SHOULD BE S...

Page 12: ...T AT 0 35 AMPS FOR ALL MODELS Table 6 Electrical Data Size Tons Volt Compressors each OD Fan Motors each Supply Blower Motor MCA1 Amps 1 Minimum Circuit Ampacity Max Fuse2 Breaker3 Size Amps 2 Maximum...

Page 13: ...IMENSIONS 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...

Page 14: ...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 are...

Page 15: ...ld be followed in all cases unless superseded by local codes or gas company requirements Refer to Tables 7 and 8 The heating value of the gas may differ with locality The value should be checked with...

Page 16: ...80 370 80 43 90 170 350 90 40 84 160 320 100 38 79 150 305 Table 8 Propane LP Gas Pipe Sizing Chart1 1 Maximum capacity of pipe in thousands of BTU per hour based upon a pressure drop of 0 5 inch wate...

Page 17: ...a Propane Conversion Accessory Model 1NP0807 for 2 Ton unit with 33 1 2 tall cabinet and Model 1NP0808 for 3 and 4 Ton units with 41 1 2 tall cabinets Available On Models Input Capacity Mbh 2 2 Heati...

Page 18: ...Y1 COOL A 900 198 233 272 313 358 406 458 512 569 Y1 COOL B 760 166 190 222 262 310 366 431 503 584 Y1 COOL C 830 180 210 245 286 332 384 441 503 571 Y1 COOL D 970 221 260 302 344 388 434 481 530 579...

Page 19: ...xternal Static Pressure Inch Water Gauge 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 Watts Watts Watts Watts Watts Watts Watts Watts Watts 024 2 0 Cool Low Y1 COOL A 600 100 122 145 169 194 221 249 279 310 Y1...

Page 20: ...332 375 419 463 509 555 602 649 High Y1 Y2 COOL A 1550 586 640 696 752 810 869 929 991 1053 Y1 Y2 COOL B 1400 466 513 561 611 663 715 770 826 882 Y1 Y2 COOL C 1600 630 687 745 804 864 926 988 1052 11...

Page 21: ...l climate in your area Place the DELAY jumper tap on the CFM selection board on the appropriate pin setting Factory Set Gas Heat CFM The blower speed required for gas heat is different than for coolin...

Page 22: ...r heat ends Pre purge The control board monitors the low pressure switch and ensures it remains closed during pre purge If the pressure switch opens the control goes back to pressure switch proving mo...

Page 23: ...the inducer If a call for heat occurs during post purge the control finishes the post purge drops inducer out to re prove open pressure switch before continuing with the heat cycle Heat Blower Off Del...

Page 24: ...e operation 5 Auxiliary Limit Switch ALS This control is located inside the heat exchanger compartment and is set to open at 160 F It is a manual reset switch If ALS trips then the primary limit LS ha...

Page 25: ...sition 9 Replace the control access panel 10 Turn on all electric power to the unit 11 Set the thermostat to the desired setting 12 If the unit will not operate follow the instructions To Turn Off Gas...

Page 26: ...forward turn at an angle and pull back 3 Burners are now accessible for service Pilot Instruction To adjust the pilot flame Figure 19 Proper Flame Adjustment 1 Remove the pilot adjustment cover screw...

Page 27: ...of the furnace rating with allowance being made for the permissible range of the regulator setting replace the orifice spuds with spuds of the proper size NOTE To find the BTU input multiply the numb...

Page 28: ...279550 YIM A 0207 28 Unitary Products Group Typical Wiring Diagrams Typical DNX024 Cooling Unit with Single Stage Gas Heat 208 230 1 60 volt Wiring Diagram...

Page 29: ...279550 YIM A 0207 Unitary Products Group 29 Typical DNX024 Cooling Unit with Two Stage Gas Heat 208 230 1 60 volt Wiring Diagram...

Page 30: ...279550 YIM A 0207 30 Unitary Products Group Typical DNX036 048 Cooling Unit with Single Stage Gas Heat 208 230 1 60 volt Wiring Diagram...

Page 31: ...279550 YIM A 0207 Unitary Products Group 31 Typical DNX036 048 Cooling Unit with Two Stage Gas Heat 208 230 1 60 volt Wiring Diagram...

Page 32: ...279550 YIM A 0207 32 Unitary Products Group Typical DNX036 048 Cooling Unit with Single Stage Gas Heat 208 230 3 60 volt Wiring Diagram...

Page 33: ...279550 YIM A 0207 Unitary Products Group 33 Typical DNX036 048 Cooling Unit with Two Stage Gas Heat 208 230 3 60 volt Wiring Diagram...

Page 34: ...279550 YIM A 0207 34 Unitary Products Group Typical DNX036 048 Cooling Unit with Single Stage Gas Heat 460 3 60 volt Wiring Diagram...

Page 35: ...279550 YIM A 0207 Unitary Products Group 35 Typical DNX036 048 Cooling Unit with Two Stage Gas Heat 460 3 60 volt Wiring Diagram...

Page 36: ...g cylinders and recovery equipment must be dedicated for use on R 410A systems only Manifold sets must be at least 700 psig high side and 180 psig low side with 550 psig retard All hoses must have a s...

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