Manuals / Carrier / Household Appliance / Heating System

Carrier 48PG20-28 specifications Shipping Rail Removal, Rigging Details, Shipping Rails

Models: 48PG20-28

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SHIPPING RAILS

SHIPPING RAILS

Fig. 2 — Shipping Rail Removal

		MAX	CENTER OF GRAVITY ( IN.)
	UNIT SIZE	WEIGHT	CENTER OF GRAVITY ( IN.)
		WEIGHT
		(LB) *	X	Y	Z
		(LB) *	X	Y	Z
	PG20	3825	66.5	36.7	31.4
	PG24	4075	66.5	37.0	31.8
	PG28	4300	70.5	37.0	35.2

DOES NOT INCLUDE ERV ( ENERGY RECOVERY VENTILATOR) OPTION.

NOTES:

1.Add 150 lb (68 kg) for domestic crating.

2.See label for unit location on roof curb.

Fig. 3 — Rigging Details

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Carrier 48PG20-28 specifications Shipping Rail Removal, Rigging Details, Shipping Rails

Contents

CONTENTS Installation, Start-Upand Service InstructionsSAFETY CONSIDERATIONS INSTALLATION Step 1 - Provide Unit Support Fig. 1 - Roof Curb Details Fig. 3 - Rigging Details Fig. 2 - Shipping Rail RemovalSHIPPING RAILS Fig. 4 - Base Unit Dimensions Table 1 - Physical Data 48PG 1750 Step 5 - Make Unit Duct Connections Fig. 5 - Alignment Hole DetailsFig. 6 - Alignment Hole Location Fig. 8 - Air Distribution - Concentric DuctStep 6 - Install Flue Hood and Inlet Hood Fig. 11 - Combustion Fan Housing LocationFig. 9 - Concentric Duct Details Fig. 10 - Flue and Inlet Hood LocationsStep 9 - Make Electrical Connections Fig. 12 - Condensate Drain DetailsFig. 13 - Condensate Drain Piping Details Fig. 14 - Field Gas PipingFig. 15 - Field Power Wiring Connections Fig. 16 - Field Control Thermostat WiringFig. 17 - Outdoor-AirHood Component Shipping LocationCOMPRESSOR 10.6 LEGEND AND NOTES FOR TABLES 4A AND 4B Fig. 18 - Outdoor-AirHood DetailsFig. 19 - Outdoor-AirHood Assembled Fig. 20 - Manual Damper DetailsFig. 22 - Bracket and Hood Positioning PRE-START-UP START-UP3.Connect pressure gage to manifold pressure tap AIRFLOW AIRFLOW AIRFLOW AIRFLOW Page AIRFLOW AIRFLOW Page AIRFLOW AIRFLOW Page AIRFLOW Page Page AIRFLOW AIRFLOW GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES Table 25 - Evaporator Fan Motor Specifications Table 24 - Operation Air Quantity LimitsHD60FK651 Table 27 - Fan Rpm at Motor Pulley Settings Fig. 25 - Temperature Changeover Set Points Fig. 24 - Sensor Locations OAT and MATTable 28 - EconoMi$er IV Sensor Usage Fig. 26 - EconoMi$er IV Wiring Fig. 27 - Enthalpy Changeover Set Points and LED Locations13B C D C B ATO x OA + TR x RA = TM Table 29 - CO2 Sensor Standard Settings Operating SequenceFig. 30 - Subcooler Operation SERVICE What to do if you smell gasLubrication Fig. 32 - Removing Heat Exchanger CeramicFig. 31 - Typical Gas Heating Section Baffles and ClipsFig. 33 - Evaporator-FanMotor Adjustment Fig. 34 - Evaporator-FanAlignment and AdjustmentCondenser-FanAdjustment Fig Table 30 - Belt Tension AdjustmentFig. 35 - Condenser-FanAdjustment Table 31 - Sensor Temperature/Resistance ValuesGas Valve Adjustment Fig. 37 - Charging Chart - 48PG20Fig. 38 - Charging Chart - 48PG24 Fig. 39 - Charging Chart - 48PG28Fig. 41 - Spark Gap Adjustment Fig. 40 - Gas ValveProtective Devices Table 32 - Altitude CompensationFig. 42 - Typical Low Voltage Control Schematic Fig. 43 - Typical Power Schematic Page Fig. 45 - Typical Component Arrangement - 48PG28 LEGEND FOR FIGTable 33 - Cooling Service Analysis TROUBLESHOOTINGLEGEND TXV - Thermostatic Expansion Valve Table 34 - Gas Heating Service Analysis PROBLEMPoor Flame Characteristics CAUSELEGEND IDM - Induced-DraftMotor Fig. 46 - IGC Control Heating and CoolingIGC - Integrated Gas Unit Controller EconoMi$er IV Troubleshooting Table 35 - IGC Board LED Alarm CodesMIXED-AIRINPUT - To check mixed-airinput Copyright 2005 Carrier Corporation Page UNIT START-UPCHECKLIST I. PRE-START-UPII.START-UP ELECTRICAL