Carrier 48/50AJ manual

Table 57 — Staging Sequence without Hot Gas Bypass — 48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027

	STAGE		SEQUENCE 1				SEQUENCE 2
	STAGE	0	1	2	3	0	1	2	3
		0	1	2	3	0	1	2	3
	COMP		Compressor Status				Compressor Status
	A1	OFF	ON	ON	ON	OFF	OFF	OFF	ON
	A2	OFF	OFF	OFF	ON	OFF	ON	ON	ON
	B1	OFF	OFF	ON	ON	OFF	OFF	ON	ON
	UNIT		Unit Capacity 48/50A				Unit Capacity 48/50A
	020	0%	30%	70%	100%	0%	30%	70%	100%
	025	0%	33%	67%	100%	0%	33%	67%	100%
	027	0%	33%	67%	100%	0%	33%	67%	100%

Table 58 — Staging Sequence with Hot Gas Bypass — 48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027

STAGE									SEQUENCE 1														SEQUENCE 2
STAGE		0					1			2				3	4			0		1			2				3	4
		0					1			2				3	4			0		1			2				3	4
COMP								Compressor Status														Compressor Status
A1			OFF				ON*			ON				ON		ON		OFF		OFF			OFF				OFF		ON
A2			OFF				OFF			OFF				OFF		ON		OFF		ON*			ON				ON		ON
B1			OFF				OFF			OFF				ON		ON		OFF		OFF			OFF				ON		ON
UNIT								Unit Capacity 48/50A														Unit Capacity 48/50A
020		0%					10%			30%				70%	100%			0%		10%			30%				70%	100%
025		0%					17%			33%				67%	100%			0%		17%			33%				67%	100%
027		0%					17%			33%				67%	100%			0%		17%			33%				67%	100%
*With Minimum Load Valve ON.
							Table 59 — Staging Sequence without Hot Gas Bypass —
							48/50A3,A5030-060 and Multi-Stage 48/50A2,A4030-060

STAGE									SEQUENCE 1														SEQUENCE 2
STAGE			0				1			2				3	4			0		1			2				3	4
			0				1			2				3	4			0		1			2				3	4
COMP								Compressor Status														Compressor Status
A1			OFF				ON				ON			ON		ON		OFF		OFF			ON				OFF		ON
A2			OFF				OFF			OFF				ON		ON		OFF		ON			OFF				ON		ON
B1			OFF				OFF				ON			ON		ON		OFF		OFF			ON				ON		ON
B2			OFF				OFF			OFF				OFF		ON		OFF		OFF			OFF				ON		ON
UNIT								Unit Capacity 48/50A														Unit Capacity 48/50A
030			0%				25%			50%				75%	100%			0%		25%			50%				75%	100%
035			0%				20%			50%				80%	100%			0%		20%			50%				70%	100%
040			0%				25%			50%				75%	100%			0%		25%			50%				75%	100%
050			0%				25%			50%				75%	100%			0%		25%			50%				75%	100%
060			0%				25%			50%				75%	100%			0%		25%			50%				75%	100%
			Table 60 — Staging Sequence with Hot Gas Bypass — 48/50A3,A5030-060

STAGE								SEQUENCE 1															SEQUENCE 2
STAGE		0			1			2			3			4		5		0		1		2			3		4		5
		0			1			2			3			4		5		0		1		2			3		4		5
COMP								Compressor Status														Compressor Status
A1			OFF		ON*			ON			ON			ON		ON		OFF		OFF		OFF			OFF		OFF		ON
A2			OFF		OFF			OFF			OFF			ON		ON		OFF		ON*		ON			ON		ON		ON
B1			OFF		OFF			OFF			ON			ON		ON		OFF		OFF		OFF			OFF		ON		ON
B2			OFF		OFF			OFF			OFF			OFF		ON		OFF		OFF		OFF			ON		ON		ON
UNIT								Unit Capacity 48/50A														Unit Capacity 48/50A
030		0%			10%			25%			50%			75%		100%		0%		10%		25%			50%		75%		100%
035		0%			7%			20%			50%			80%		100%		0%		7%		20%			50%		70%		100%
040		0%			14%			25%			50%			75%		100%		0%		14%		25%			50%		75%		100%
050		0%			16%			25%			50%			75%		100%		0%		16%		25%			50%		75%		100%
060		0%			18%			25%			50%			75%		100%		0%		18%		25%			50%		75%		100%

*With minimum load valve ON.

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Image 45

Carrier 48/50AJ specifications Staging Sequence with Hot Gas Bypass 48/50A3,A5030-060

Contents

Contents Controls, Start-Up, Operation, Service and Troubleshooting Safety Considerations Contents Basic Control Usage GeneralSeries Product Line Sents pressing Enter to move into the next level Scrolling Marquee System Pilot User Interface Test START-UP Fan Performance 48AJ,AK027,030 and 48A2,A3025-030 Units Fan Performance 48AJ,AK020,025 and 48A2,A3020 Units Fan Performance 48AJ,AK036 Units Fan Performance 48AJ,AK,A2,A3035 Units Fan Performance 48AJ,AK041 Units Fan Performance 48AJ,AK,A2,A3040 Units Fan Performance 48AJ,AK051 Units Fan Performance 48AJ,AK,A2,A3050 Units Fan Performance 50AJ,AK020,025 and 50A2,A3020 Units Fan Performance 48AJ,AK,A2,A3060 Units Fan Performance 50AJ,AKA2,A3035 Units Fan Performance 50AJ,AK027,030 and 50A2,A3025-030 Units Fan Performance 50AJ,AK,A2,A3040 Units Fan Performance 50AJ,AK036 Units Fan Performance 50AJ,AK,A2,A3050 Units Fan Performance 50AJ,AK041 Units Fan Performance 50AJ,AK,A2,A3060 Units Fan Performance 50AJ,AK051 Units Fan Performance 48AW,AY027,030 and 48A4,A5025-030 Units Fan Performance 48AW,AY020,025 and 48A4,A5020 Units Fan Performance 48AW,AY036 Units Fan Performance 48AW,AY,A4,A5035 Units Fan Performance 48AW,AY041 Units Fan Performance 48AW,AY,A4,A5040 Units Fan Performance 48AW,AY051 Units Fan Performance 48AW,AY,A4,A5050 Units Fan Performance 50AW,AY020,025 and 50A4,A5020 Units Fan Performance 48AW,AY,A4,A5060 Units Fan Performance 50AW,AY,A4,A5035 Units Fan Performance 50AW,AY027,030 and 50A4,A5025-030 Units Fan Performance 50AW,AY,A4,A5040 Units Fan Performance 50AW,AY036 Units Fan Performance 50AW,AY,A4,A5050 Units Fan Performance 50AW,AY041 Units Fan Performance 50AW,AY,A4,A5060 Units Fan Performance 50AW,AY051 Units Air Quantity Limits 48AJ,AK,AW,AY,A2,A3,A4,A5 Motor Limitations Air Quantity Limits 50AJ,AK,AW,AY,A2,A3,A4,A5 Controls Quick StartPage Indoor Air Quality IAQ Options Service Test MLV Service Test Demand Controlled Ventilation Control Third Party Control Controls Operation Expansion Range CCN Point Operating Modes Display Table Hvac TYP = 6 SPT-2 STG TYP = 3 TSTAT-MULTI Unit Configuration Expansion Range Units CCN Point DefaultsThere will be no MAT calculation Under Configuration→UNIT Machine Dependent Configurations Supply Air Reset ConfigurationSetpoints Cooling Configuration Are VAV occupied cooling offsets under Setpoints Advanced Scroll Temperature Protection Label Cool Mode Evaluation LV.T Cool/Heat Set Point Offsets Configuration Stage Sequence 48/50AJ,AW020-027 Stage Sequence 48/50AJ,AW030-060Stage Sequence Staging Sequence with Hot Gas Bypass 48/50AK,AY030-060 Stage Sequence 48/50A2,A4020-027Stage Sequence 48/50A2,A4030-060 Staging Sequence with Hot Gas Bypass 48/50A3,A5030-060 PCT = MAT EDT/ C.CAP Run Status Mode Trip Helper Expansion Range Units CCN Point Write Status Run Status Cool Display Inputs→GEN.I→DL.S1 Inputs→GEN.I→DL.S2 Control will not attempt to learn MAT over time Expansion Range Units CCN Point Default Demand Limit Configuration FAN Relay 48/50A Unit Size Condenser Fan Staging Occupied Heating Enable OC.EN This configuration Heating Configuration Uhsp Expansion Range Units CCN Default Point Ohsp Expansion Units CCN Point Mode Trip Helper Table Staged Gas Heat 48AJ,AK,AW,AY Units Staged Gas ConfigurationUnit Size Unit Model no Relay Output Stage Staged Gas Heat 48A2,A3,A4,A5 Units Hvac mode = Tempering Vent IGC LED IndicatorsLED Indication Error Code CapacityPage Static Pressure Control Configuration As an example, the static pressure reset limit SP.LM = Fan Status Monitoring Static Pressure Reset Related Points Fan Status Monitoring ConfigurationDirty Filter Switch Points Outdoor Enthalpy Changeover None Custom Changeover Curve Example Economizer Configuration Table Tstat 2 Stage SPT Multi-StagingSPT 2 Stage Economizer Run Status Table Building Pressure Configuration Power Exhaust Staging BP.CF =PE.A PE.B PE.C Expansion Range CCN Write Point Status PID Indoor Air Quality Control The indoor air quality Will be turned off when DAQ is below the DAQ Fan Off Set Described above when DAQ is above the DAQ Fan On SetTrol can also be set up to respond to a discrete IAQ input IQ.A.F = 2 Fan On Occupied/Unoccupied IAQ IAQ Purge Configuration → IAQ → IAQ.P → IQ.PG Dehumidification Configuration Indoor Air Quality Configuration Temperature Compensated Start This logic is Carrier Comfort Network CCN System ItExpansion Range Units CCN Point Expansion Range Units Point Default CCN Configuration Sensor Trim Configuration Alert Limit Configuration Discrete Switch Logic Configuration The SW.LG Switch Logic Configuration Time Clock ConfigurationDisplay Configuration Remote Switch Configuration Remote Switch Logic Configuration OpenClosed Time Clock Configuration Troubleshooting Problem Solution Compressor does not RUN Cooling Service AnalysisCompressor Stops on High Pressure Compressor Cycles on LOW Pressure System is Noisy Unit Operates TOO Long or ContinuouslyCompressor Loses OIL Frosted Suction Line Gas Heating Service Analysis Electric Heat Service AnalysisProblem Cause Remedy IGC Service Analysis Logic 5K Thermistor Temperature vs. Resistance SCT Sensors English 5K Thermistor Temperature vs. Resistance SCT Sensors SI 143 Pressure Voltage Psig Drop Pressure Voltage Psig Pressure Voltage Psig Drop 175 503 PCT = MAT EDT/C.CAP Auto View of Run Status Display Table Economizer Run Status Display TableExpansion Range Units Point Write Status Cooling Information Display Table Mode Trip Helper Display TableCCN/Linkage Display Table Compressor Run Hours Display Table Software Version Numbers Display Table Time Guard Display TableExpansion Range Units Point Write Status Tmgd Expansion Range Units Point Write Status Vers P051 Alert and Alarm Codes CEM Check for welded contactor Verify CS wiring T122 Circuit a High Saturated Suction Temperature Page Page At Configuration→UNIT→SENS→FLT.S Major System Components Factory-Installed Components 102 103 104 105 Typical Auxiliary Control Box Wiring Schematic 106 ~~~ ~~~~ 107 108 109 110 111 112 113 Typical Power Schematic 48/50A2,A3,A4,A5060 Unit Shown 114 Typical Controls Option Wiring Schematic Typical Small Chassis Component Location Size 020-035 Units 115 Typical Large Chassis Component Locations Size 036-060 Units 116 117 118 Main Control Board MBB Inputs and Outputs 119 Economizer Control Board ECB1 Inputs and Outputs VAV Control Board ECB2 Inputs and Outputs 120Outputs Sfanvfd 121 Staged Gas Control Board SCB Inputs and Outputs Controls Expansion Board CEM Inputs IGC Board Inputs and Outputs122 Terminal Function 123 W2 G 124Board SW1 SW2 SW3 SW4 ECB1 ECB2 SCB CEM 125 Field Connection Terminal Strips IME 126 127 CIDHvac 128 Service Gas Heat Section Details Manufacturer Lubricant Lubrication Belt Tension Adjustment To adjust belt tension Evaporator Fan Service and ReplacementEvaporator-Fan Motor Replacement 131 Round Tube, Plate Fin Unit Charge Condenser-Fan Adjustment132 Unit Refrigerant Size Liquid 133 Charging Chart 48/50A2,A3,A4,A5020 with R-410A Refrigerant 134 27 Ton Mchx Circuit a Charging Chart 135 Charging Chart 48/50A2,A3,A4,A5030 with R-410A Refrigerant 136 Charging Chart 48/50A2,A3,A4,A5035 with R-410A Refrigerant Charging Chart 48/50A2,A3,A4,A5050 with R-410A Refrigerant Charging Chart 48/50A2,A3,A4,A5040 with R-410A Refrigerant 138 Charging Chart 48/50A2,A3,A4,A5060 with R-410A Refrigerant Main Burner Removal Gas Valve Part Number EF33CW271 140 Mode RUN Status 141 Appendix a Local Display Tables 142 Description Range Units CCN Point Default 143 Mode Inputs 144 Mode Configuration →BP.SP 145 →SC.OV→SPT.O 146 147 Mode Time Clock 148 Appendix B CCN Tables Appendix B CCN Tables Status Display Tables149 Display Name Range Units Point Name Write Status Temps 150Tstat Uinputs 151 Name Range Units Point Name Default Schedovr Config TablesName Range Units Point Name Default Allm 152 153 SERVICE-CONFIG Tables Name Range Units Point Name Default Heat 154Trim 155 Name Range Units Point Name Default Swlg ALARMS02 ALARMS03 ALARMS04 ALARMS05 Compresr Display Name Range Units Point Name Write Status ALARMS01156 Dmandlim 157 Maintenance Display TablesDisplay Name Range Units Point Name Write Status Econmin Ecdiag 158 159 160 Appendix C VFD Information Table a VFD Terminal Designations161 Table B VFD Configurations Appendix C VFD InformationOver Ride Fig. C Standard Display Example Appendix C VFD Information Appendix C VFD Information 166 Table C Fault Codes Replace the cooling fan Restore power Table D Alarm CodesTable E Maintenance Intervals 167 Fig. D Main Fan Replacement Frame Sizes R1-R4 169 Fig. F Internal Enclosure Fan Replacement Appendix D Mode Selection Process 171 Appendix E UPC Open Controller Table B Baud Selection Table Table a SW3 Protocol Switch Settings For MS/TP172 DS8 DS7 DS6 DS5 DS4 DS3 Table C MS/TP Wiring Recommendations Appendix E UPC Open Controller173 174 Wiring Specifications Recommended Vendors and Part NumbersRmcorp CMP RUN LED Error LED Status Table E LED Status Indicators175 LED Status Network Points List Bacnet Point Name Read Units Default Range Object ID176 Object Name Point 177 Appendix E UPC Open Controller Network Points List 178 179 Bacnet Point Name Read Units Default Range Object ID Only 180 181 182 183 Index Copyright 2010 Carrier Corporation Expansion Range Default Entry Controls SET Point and Configuration LOG CL-2 CL-3 CL-4 CL-5 PRE-START-UP Unit START-UP Checklist