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279550-YIM-A-0207

Unitary Products Group

23

Main Burner Operation

High Heat Warm-up

Two stage models run high heat for the first 60 seconds 
following Pilot Flame Stabilization period regardless of W2 
demand. If W2 is not energized at the end of this 60 second 
period the control de energizes the high gas output and steps 
the inducer to low speed. If W2 is energized the control remains 
on high heat.

There is no high heat warm-up on single stage models.

Low Heat

The control board keeps the pilot gas valve, main gas valve and 
induced draft motor energized while continuously monitoring 
the call for heat, low pressure switch, and flame status.

If the call for heat (W1) is lost, the control de-energizes the gas 
valve and begins post purge.

If low pressure switch opens, the control de-energizes the gas 
valve and begins pressure switch proving mode. 

If flame is lost, the control de-energizes the gas valve within 2.0 
second and counts the flame loss. If flame has been lost more 
than 16 times within the same call for heat, the control board 
locks out flashing “5” on the LED. If flame has been lost less 
than 16 times, the control attempts re-ignition after a 300 
second inter-purge period.

High Heat

If the W2 terminal was energized more than 1 second before 
W1 at the start of the call for heat, and remains continuously 
energized through the call for heat, the control considers it to be 
connected to a single stage thermostat and implements a 10 
minute Auto staging feature. The 2nd stage thermostat call is 
ignored until 10 minutes into steady heat (9 minutes after high 
heat warm-up ended).

The control recognizes a call for 2nd stage heat when W2 is 
energized (connected to “R”). The control energizes the high 
gas output and induced draft motor on high speed.

If the call for 2nd stage heat goes away and the 1st stage call 
remains, the control de energizes the high gas valve, drops 
inducer speed to low, and returns to low heat operation.

Response to loss of W1, low pressure switch, and flame are 
identical to low heat operation.

Post Purge

The control board runs the induced draft motor for a 30 second 
post-purge period, and then de-energizes 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 Delay

The control board de-energizes the indoor blower motor after a 
delay time as selected by movable shunt (60, 90, 120 or 180 
seconds). Blower timing begins when the thermostat is satisfied 
or heat cycle was interrupted. The control returns to standby 
when the blower off delay is complete.

If the thermostat call for heat returns before the blower off delay 
is complete, the control begins an ignition sequence with pre-
purge while the blower off delay continues.

Lockout

While in lockout, the control board keeps the pilot gas valve, 
main gas valve and induced draft motor de-energized.

Lockouts due to failed ignition or flame losses may be reset by 
removing the call for heat (W1) for more than 1 second, but less 
than 20 seconds, or by removing power from the control for 
over 0.25 seconds. The control will automatically reset lockout 
after 60 minutes.

Lockouts due to detected internal control faults will reset after 
60 minutes or power interruption.

High Temperature Limit Switch

Any time the high temperature limit switch is open the control 
board will run the indoor blower motor on heat speed, the 
inducer (on high speed for 2 stage models), de-energize the 
gas valve, and flash “6” on the LED. When the high temperature 
switch closes, the control will restart the ignition sequence 
beginning with pre-purge.

Rollout Switch

If the rollout switch opens for more than 0.25 seconds, the 
control board will run the inducer (on high speed for 2 stage 
models) for a post-purge period, immediately de-energize the 
gas valve, and flash “7” on the LED. The blower output will be 
energized during an open rollout condition.

If the rollout switch closes, the control shall remain locked out 
until power removed or “W” is removed. 

Rollout switch lockout shall not reset automatically.

Power Interruptions

Power interruptions of any duration shall not cause lockout or 
any operation requiring manual intervention.

Flame present with Gas off

If flame is sensed for longer than 4.0 seconds during a period 
when the gas valve should be closed, the control will enter 
lockout flashing “8” on the LED. The control will turn on the 
inducer blower while the flame is present.

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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