Carrier 48VT(N) Interface Fan Board IFB, 48VT-AWet Coil Pressure Drop, 48VT--A

Page 18

Fig. 14 - Interface Fan Board (IFB)

48VT-- A

C9

OILL C2

D5 D3

P3 SDL

	GAS
	HEAT		HIGH	LOW		COM
	QC6	K2	QC7	QC4	K1	QC3
		K2			K1	DCR QCR	CDM/C
						DCR QCR

	RL3	C8	R1L	Q1	D2	C
	RL3	C8	R1L	Q1			24VAC/R
	RI0					QC1


				JM6
				Q3		RI2
	C4			G1JM5		RI DL
				G1JM5		RI DL	3 AMP
D6	D4			G2			3 AMP
				G2

	A7	R9	AB A15				F1
							F1

								C0
					U1
						C3	R4	RL4
		C7
							JW3
	R2	R3		R5	R6
	R2			P2
JW7	QCB			P2
	QCB

							JW2
	Y	Y	R	U	C	24VAC		JW4
	Y	Y	R	U	C	24VAC

																																										JW1			P1
																																										JW1			P1


																						SSTZ-8

																																												Y2/				Y1/
																																												W2 DH	G			Y C	R																										A09058


																					Fig. 14 - Interface Fan Board (IFB)
																Table 7 – Filter Pressure Drop Table (IN. W.C.)

	FILTER SIZE																																														CFM
	in. (mm)				500			600			700				800	900					1000							1100								1200							1300				1400		1500				1600					1700				1800		1900				2000		2100		2200			2300
	20X20X1				0.05			0.07			0.08				0.1	0.12					0.13							0.14								0.15								—				—	—				—						—				—	—				—			—	—			—
	(508X508X25)				0.05			0.07			0.08				0.1	0.12					0.13							0.14								0.15								—				—	—				—						—				—	—				—			—	—			—
	(508X508X25)

	20X24X1					—		—				—			—	0.09					0.10							0.11								0.13							0.14				0.15		0.16				—						—				—	—				—			—	—			—
	(508X610x25 )					—		—				—			—	0.09					0.10							0.11								0.13							0.14				0.15		0.16				—						—				—	—				—			—	—			—
	(508X610x25 )

	24X30X1					—		—				—			0.04	0.05					0.06							0.07								0.07							0.08				0.09		0.1				—						—				—	—				—			—	—			—
	(610X762x25)					—		—				—			0.04	0.05					0.06							0.07								0.07							0.08				0.09		0.1				—						—				—	—				—			—	—			—
	(610X762x25)

	24X36X1					—		—				—			—	—							—							—						0.06							0.07				0.07		0.08				0.09					0.09				0.10		0.11				0.12		0.13		0.14			0.14
	(610X914X25)					—		—				—			—	—							—							—						0.06							0.07				0.07		0.08				0.09					0.09				0.10		0.11				0.12		0.13		0.14			0.14
	(610X914X25)

																		Table 8 – 48VT-A Wet Coil Pressure Drop

	Unit Size																																							Standard CFM (S.C.F.M)
			500			600				700				800		900								1000												1100								1200				1300				1400						1500					1600				1700			1800		1900				2000
	24						0.06			0.07				0.08		0.09											0.1
	30													0.12		0.15											0.19									0.23								0.27
	36																										0.07									0.11								0.18				0.26				0.35
	42																																											0.04				0.07				0.1						0.15					0.21
	48																																																			0.11						0.14					0.17				0.22			0.28
	60																																																														0.1				0.17			0.23		0.31				0.36
						Table 9 – Wet Coil Air Delivery - Downflow - High Speed with 1-in. Filter and Economizer

	UNIT SIZE																																											EXTERNAL STATIC PRESSURE (in. W.C.)
													0.1			0.2											0.3															0.4					0.5					0.6										0.7					0.8				0.9				1.0
			36, 42									1612				1569											1527															1481					1451					1393										1351					1317				1278				1242
			48									2298				2239											2180															2110					2044					1951										1862					1777				1697				1591
			60									2000				1926											1825															1820					1759					1705										1634					1496				1412				1328

18

Image 18

Contents Fig. 1 - Unit 48VT-A TABLE OF CONTENTSSAFETY CONSIDERATIONS Installation InstructionsStep 1 - Check Equipment RECEIVING AND INSTALLATIONINTRODUCTION Step 2 - Provide Unit SupportFig. 2 - 48VT-A24-30Unit Dimensions 48VT--AA09146 Fig. 3 - 48VT-A36-60Unit Dimensions 48VT--AA09147 SMALL CURB Fig. 4 - Roof Curb Dimensions48VT ROOF CURB DETAILInspection ACCESS PANELS MUST BE IN PLACE WHEN RIGGINGStep 5 - Rig and Place Unit Rigging/Lifting of Unit See FigStep 6 - Connect Condensate Drain Step 7 - Install Flue HoodStep 8 - Install Gas Piping Fig. 6 - Condensate TrapFig. 7 - Sediment Trap Step 9 - Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge FIRE OR EXPLOSION HAZARD48VT--A Table 1 - Physical Data - Unit 48VT-AFig. 8 - Supply and Return Duct Opening Horizontal Duct CoversTable 3 - Heating Inputs Table 1 - Physical Data - Unit 48VT-ACont’dTable 2 - Maximum Gas Flow Capacity 48VT--AHigh-VoltageConnections Step 10 - Install Electrical ConnectionsSpecial Procedures for 208-VOperation Control Voltage ConnectionsTransformer Protection Balance Point Setting-Thermidistator HybridPRE-START-UP ThermostatStep 1 - Check for Refrigerant Leaks Step 3 - Start-upHeating and Make Adjust- mentsSTART-UP Step 2 - Unit Sequence of OperationCheck Heating Control Adjust Gas InputFig. 11 - Burner Assembly Check Gas InputNormal Operation Limit SwitchesCheck Burner Flame Airflow and Temperature RiseChecking and Adjusting Refrigerant Charge Step 4 - Start-upCooling and Make Adjust- mentsRollout Switch Indoor Airflow and Airflow AdjustmentsTable 6 - Color Coding for Indoor Fan Motor Leads Gas Heating Fan Speed Set-upContinuous Fan Operation 48VT--A48VT--A Fig. 14 - Interface Fan Board IFBTable 8 - 48VT-AWet Coil Pressure Drop Table 7 - Filter Pressure Drop Table IN. W.C48VT--A UNIT48VT--A Heating48VT--A 129548VT--A 144548VT--A 1448Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48VT-A 48VT AFig. 16 - 208/230-3-60Wiring Diagram, Unit 48VT-A 48VT--AA09209 50VT500173 REV Fig. 17 - Cooling Charging Table-Subcooling48VT--A A09099Air Filter MAINTENANCECleaning the Blower Motor and Wheel Indoor Blower and MotorFig. 18 - Blower Housing and Flue Collector Box Limit SwitchInduced Draft combustion air Blower Assembly Fig. 19 - Unit Access PanelsRefrigerant Circuit Electrical Controls and WiringOutdoor Fan Fig. 20 - Removal of Motor and Blower WheelHigh-PressureSwitch Pressure SwitchesLoss of Charge Switch Gas InputPage Fig. 24 - Refrigerant Circuit HPS - High Pressure SwitchLCS - Loss of Charge Switch AccuraterMetering De viceUNIT OPERATION AND SAFETY HAZARD TROUBLESHOOTINGSTART-UPCHECKLIST Synthetic Roof Precautionary ProcedurePURONR R-410AQUICK REFERENCE GUIDE 48VT--ASYMPTOM 48VT--ATable 12 - Troubleshooting Guide-Heating Table 13 - Troubleshooting Guide-LEDStatus Codes48VT--A TEMPERATURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO PRESSURESEdition Date 04/09 48VT--ACatalog No 48VT---05SI Replaces 48VT---04SI