Bryant 580J Sequence Of Operation, Electromechanical units with no economizer, Cooling, Heating

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SEQUENCE OF OPERATION

SEQUENCE OF OPERATION

General

The sequence below describes the sequence of operation for an electromechanical unit with and without a factory installed EconoMi$er IV (called “economizer” in this sequence). For information regarding a direct digital controller, see the start-up, operations, and troubleshooting manual for the applicable controller.

Electromechanical units with no economizer

Cooling —

When the thermostat calls for cooling, terminals G and Y1 are energized. As a result, the indoor fan contactor (IFC) and the compressor contactor (C1) are energized, causing the indoor fan motor (IFM), compressor #1, and outdoor fan to start. If the unit has 2 stages of cooling, the thermostat will additionally energize Y2. The Y2 signal will energize compressor contactor #2 (C2), causing compressor #2 to start. Regardless of the number of stages, the outdoor fan motor runs continuously while unit is cooling.

Heating

NOTE: Legacy Line (580J) units have either 1 or 2 stages of gas heat.

When the thermostat calls for heating, power is sent to W on the Integrated Gas Controller (IGC) board. An LED (light-emitting diode) on the IGC board turns on and remains on during normal operation. A check is made to ensure that the rollout switch and limit switch are closed. If the check was successful, the induced-draft motor is energized, and when its speed is satisfactory, as proven by the “hall effect” sensor, the ignition activation period begins. The burners will ignite within 5 seconds. If the burners do not light, there is a 22-second delay before another 5-second attempt. This sequence is repeated for 15 minutes or until the burners light. If, after the 15 minutes, the burners still have not lit, heating is locked out. To reset the control, break 24-v power to the thermostat.

When ignition occurs, the IGC board will continue to monitor the condition of the rollout switch, the limit switches, the “hall effect” sensor, as well as the flame sensor. 45 seconds after ignition occurs, assuming the unit is controlled through a room thermostat set for fan auto, the indoor fan motor will energize (and the outdoor air dampers will open to their minimum position). If, for some reason, the over-temperature limit opens prior to the start of the indoor fan blower, the unit will shorten the 45-second delay to 5 seconds less than the time from initiation of heat to when the limit tripped. Gas will not be interrupted to the burners and heating will continue. Once the fan-on delay has been modified, it will not change back to 45 seconds until power is reset to the control.

On units with 2 stages of heat, when additional heat is required, W2 closes and initiates power to the second stage of the main gas valve. When the thermostat is satisfied, W1 and W2 open and the gas valve closes, interrupting the flow of gas to the main burners.

If the call for W1 lasted less than 1 minute, the heating cycle will not terminate until 1 minute after W1 became active. If the unit is controlled through a room thermostat set for fan auto, the indoor fan motor will continue to operate for an additional 45 seconds then stop. If the over-temperature limit opens after the indoor motor is stopped, but within 10 minutes of W1 becoming inactive, on the next cycle the time will be extended by 15 seconds. The maximum delay is 3 minutes. Once modified, the fan off delay will not change back to 45 seconds unless power is reset to the control. A LED indicator is provided on the IGC to monitor operation.

Electromechanical units with an economizer

Cooling —

When free cooling is not available, the compressors will be controlled by the zone thermostat. When free cooling is available, the outdoor air damper is modulated by the EconoMi$er IV control to provide a 50_F (10_C) to 55_F (13_C) mixed air temperature into the zone. As the mixed air temperature fluctuates above 55_F (13_C)or below 50_F (10_C) dampers will be modulated (open or close) to bring the mixed air temperature back within control. If mechanical cooling is utilized with free cooling, the outdoor air damper will maintain its current position at the time the compressor is started. If the increase in cooling capacity causes the mixed air temperature to drop below 45_F (7_C), then the outdoor air damper position will be decreased to the minimum position. If the mixed air temperature continues to fall, the outdoor air damper will close. Control returns to normal once the mixed air temperature rises above 48_F (9_C). The power exhaust fans will be energized and de-energized, if installed, as the outdoor air damper opens and closes.

If field installed accessory CO2 sensors are connected to the EconoMi$er IV control, a demand controlled ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 setpoint, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor air damper will be proportionally closed. For EconoMi$er IV operation, there must be a thermostat call for the fan (G). If the unit is occupied and the fan is on, the damper will operate at minimum position. Otherwise, the damper will be closed.

When the EconoMi$er IV control is in the occupied mode and a call for cooling exists (Y1 on the thermostat), the control will first check for indoor fan operation. If the fan is not on, then cooling will not be activated. If the fan is on, then the control will open the EconoMi$er IV damper to the minimum position.

580J

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Contents 580J Product DataUnit shown with optional louvered hail guard the environmentally sound refrigerantEasy to install TABLE OF CONTENTSEasy to maintain Easy to use580J FEATURES AND BENEFITS580J MODEL NUMBER NOMENCLATURECATEGORY 580JFACTORY OPTIONS AND/OR ACCESSORIES FACTORY OPTIONS AND/OR ACCESSORIES cont 580J Table 2 – AHRI COOLING RATING TABLELEGEND NOTESAL/SS HEAT EXCHANGER 580JTable 4 - HEATING RATING TABLE - LOW NOx1 580JTable 5 – SOUND PERFORMANCE TABLE dB ---DecibelUNIT 580JCOOLING HEATINGTable 7 – PHYSICAL DATA 580JCOOLING 3 - 6 TONSTable 8 – PHYSICAL DATA Heat Anticipator setting AmpsHEATING 3 - 6 TONSTable 9 – PHYSICAL DATA 580JCOOLING 7.5 - 8.5 TONSHEATING Table 10 – PHYSICAL DATA7.5 - 8.5 TONS 580JCOOLING Table 11 – PHYSICAL DATA10 - 15 TONS 580JHEATING Table 12 – PHYSICAL DATA10 - 15 TONS 580JCURBS & WEIGHTS DIMENSIONS - 580J Fig. 1 - Dimensions 580J580J Fig. 2 - Dimensions 580J CURBS & WEIGHTS DIMENSIONS - 580J 04-07contFig. 3 - Service Clearance 580JACCESSORY CURBS & WEIGHTS DIMENSIONS - 580J 04-07contACCESSORY 580JFig. 5 - Dimensions 580J CURBS & WEIGHTS DIMENSIONS - 580J580J C101217Fig. 7 - Service Clearance CURBS & WEIGHTS DIMENSIONS - 580J 08-12cont580J Fig. 6 - 580JACCESSORY CURBS & WEIGHTS DIMENSIONS - 580J580J Fig. 8 - Roof Curb DetailsFig. 9 - Dimensions 580J-14 CURBS & WEIGHTS DIMENSIONS - 580J580J C101223CURBS & WEIGHTS DIMENSIONS - 580J 14 cont Fig. 10 - Service Clearance580J CURBS & WEIGHTS DIMENSIONS - 580J 580JC101231 CURBS & WEIGHTS DIMENSIONS - 580J 16 cont 580JC101232 CURBS & WEIGHTS DIMENSIONS - 580J 580JC10772 580J OPTIONS & ACCESSORY WEIGHTSAPPLICATION DATA Sizing a rooftop APPLICATION DATA contLow ambient applications 580J580J SELECTION PROCEDURE WITH 580J*07A EXAMPLE1I.Determine cooling and heating loads II.Make an initial guess at cooling tons1-STAGECOOLING Table 13 - COOLING CAPACITIES3 TONS 580JTable 14 – COOLING CAPACITIES 580J1-STAGECOOLING 3 TONS1-STAGECOOLING Table 15 – COOLING CAPACITIES4 TONS 580JTable 16 – COOLING CAPACITIES 580J1-STAGECOOLING 4 TONS1-STAGECOOLING Table 17 – COOLING CAPACITIES5 TONS 580JTable 18 – COOLING CAPACITIES 580J1-STAGECOOLING 5 TONS1-STAGECOOLING Table 19 – COOLING CAPACITIES6 TONS 580JTable 20 – COOLING CAPACITIES 580J1-STAGECOOLING 6 TONS1-STAGECOOLING Table 21 – COOLING CAPACITIES7.5 TONS 580JTable 22 – COOLING CAPACITIES 580J2-STAGECOOLING 7.5 TONS2-STAGECOOLING Table 23 – COOLING CAPACITIES7.5 TONS 580JTable 24 – COOLING CAPACITIES 580J1-STAGECOOLING 8.5 TONS2-STAGECOOLING Table 25 – COOLING CAPACITIES8.5 TONS 580JTable 26 – COOLING CAPACITIES 580J2-STAGECOOLING 8.5 TONS1-STAGECOOLING Table 27 - COOLING CAPACITIES10 TONS 580JTable 28 – COOLING CAPACITIES 580J2-STAGECOOLING 10 TONS2-STAGECOOLING Table 29 – COOLING CAPACITIES10 TONS 580JTable 30 - COOLING CAPACITIES 580J2-STAGECOOLING 12.5 TONS2-STAGECOOLING Table 31 – COOLING CAPACITIES12.5 TONS 580JTable 32 – COOLING CAPACITIES 580J2-STAGECOOLING 15 TONSHorizontal Power Exhaust ECONOMIZER, BAROMETRIC RELIEF AND PE PERFORMANCEFig. 14 - Horizontal Power Exhaust Performance PERFECT HUMIDITY580J Fig. 18 - Vertical Power Exhaust PerformanceFig. 15 - Barometric Relief Flow Capacity Fig. 19 - Barometric Relief Flow-Horizontal15 TonFig. 23 - Horizontal Power Exhaust Performance General fan performance notes580J 1 PHASE FAN PERFORMANCE1 PHASE 580J3 PHASE FAN PERFORMANCE cont3 PHASE Table 36 - 580J**041 PHASE 1 PHASEFAN PERFORMANCE cont 580J3 PHASE 3 PHASEFAN PERFORMANCE cont Table 40 – 580J**051 PHASE 1 PHASEFAN PERFORMANCE cont 580J3 PHASE 3 PHASEFAN PERFORMANCE cont Table 44 – 580J**063 PHASE 3 PHASEFAN PERFORMANCE cont 580J3 PHASE 3 PHASEFAN PERFORMANCE cont Table 48 – 580J**083 PHASE 3 PHASEFAN PERFORMANCE cont 580J3 PHASE 3 PHASEFAN PERFORMANCE cont Table 52 – 580J**123 PHASE 3 PHASEFAN PERFORMANCE cont 580J3 PHASE 3 PHASETable 56 – 580J*16 15 TON VERTICAL SUPPLYFactory settings Table 58 - PULLEY ADJUSTMENTFAN PERFORMANCE cont 580JTable 59 – 580J*04A ELECTRICAL INFORMATION1-StageCooling 3 TONS580J ELECTRICAL INFORMATION contTable 62 – 580J*07A 1-StageCoolingTable 65 – 580J*09A ELECTRICAL INFORMATION cont1-StageCooling 8.5 TONS580J ELECTRICAL INFORMATION contTable 68 – 580J*12D 2-StageCoolingCOMBUSTION 580JCOMBUSTION 580J580J Table 72 – MCA/MOCP DETERMINATION W/ PWRD C.O580J TABLE 68 cont. MCA/MOCP DETERMINATION W/ PWRD C.OTYPICAL WIRING DIAGRAMS Fig. 24 - 1-StageCooling Typical Power Diagram580J Fig. 25 - 2-StageCooling Typical Power Diagram 580JC08577B Fig. 26 - 1-StageTypical Wiring Diagram 580JC08524 Fig. 27 - 2-StageTypical Wiring Diagram 580JC08578 Electromechanical units with no economizer SEQUENCE OF OPERATIONElectromechanical units with an economizer Cooling —Normal Cooling SEQUENCE OF OPERATION contReheat1 Subcooling Mode - 580J04-16 Reheat2 Hot Gas Reheat Mode - 580J04-16RH2.x 580JGas Heat/Electric Cooling Packaged Rooftop GUIDE SPECIFICATIONS - 580J**04-16580J Size Range23 40 13 Panel Air Filters 23 09 93 Sequence of Operations for HVAC Controls23 81 19 Self-ContainedAir Conditioners 580J3.Unit shall be designed to conform to ASHRAE 15, 580J580J 5.Base Rail3.Standard Heat Exchanger construction 580J580J 5.Standard All Aluminum Novation Coils2.Belt-drivenEvaporator Fan 580J580J 3.Manual damper580J c.Disconnect Switch Bracket580J 21.Winter start kitCatalog No. PDS580J---10 580JPrinted in U.S.A Edition Date: 01/11
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