Main
48TJ016-028 Single-Package Rooftop Units Electric Cooling/Gas Heating
Installation, Start-Up and Service Instructions
INSTALLATION
Step 1 -- Provide Unit Support
Fig. 1 -- Horizontal Supply/Return Adapter Installation
Step 2 -- Rig and Place Unit -- Do not diop unit;
A,R
CURB
ATTACH DUCT TO ROOF CURB
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Fig. 2 -- Roof Curb Details
UNIT LEVELING TOLERANCES _Fro_ edge OFuniL to horizonLaL,
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Fig. 3 -- Rigging Details
Fig. 4- Base Unit Dimensions; 48TJ016,020
Fig. 5 -- Base Unit Dimensions; 48TJ024,028
Table 1-- Physical Data
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Table 1 -- Physical Data (cont)
Step 3 -- Field Fabricate Ductwork -- Secure all
Step 4-- Make Unit Duct Connections -- Unit
Fig. 9 -- Flue Hood Location
Step 5 -- Install Flue Hood and Wind Baffle --
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Fig. 10- Combustion FanHousing Location
Fig. 11 -- Condensate Drain Details (48TJ016 Shown)
Fig. 12- Condensate Drain Piping Details
Step 7-- Orifice Change -- This unit is factory as- sembled
Table 3 -- Orifice Quantity
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Fig. 13 -- Field Gas Piping Step 9 -- Make Electrical Connections
Be certain unused wires ale capped. Failure to do somay &_magethe transformers.
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Fig. 15 -- Field Control Thermostat Wiring
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Table 5 -- Electrical Data
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Step 10 -- Make Outdoor-Air Inlet Adjust- ments
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Table 6 -- Motormaster VControl Package Usage
Step 13 --Adjust Factory-Installed Options
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Fig. 24 -- PremierLink Controller
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Fig. 25 --PremierLink TM Controls Wiring
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Fig. 29 -- Differential Enthalpy Control Wiring
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Fig. 30 -- Outdoor and Return Air Sensor Wiring Connections for Differential Enthalpy Control
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Fig. 32--EconoMiSerlVComponent Locations-- End View
Fig. 34- EconoMi$er2 Component Locations
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Fig. 35 --EconoMi$erlV Wiring
Table 11 -- Supply Air Sensor Temperature/ Resistance Values
Table 12 -- EconoMi$erlV Sensor Usage
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Fig. 38 -- Outside Air Temperature Changeover Set Points
Fig. 39 -- Return Air Temperature or Enthalpy Sensor Mounting Location
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Fig. 40 -- Enthalpy Changeover Set Points
Fig. 41 -- EconoMi$erlV Controller
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Table 13 -- 002 Sensor Standard Settings
Step 14 -- Install Humidistat for Optional MoistureMi$er TM Package-- MoistureMi$er dehu-
29
midification
Fig. 44 -- Typical MoistureMi$er Dehumidification Package Control Box
START-UP
Unit Preparation
Table 14 -- Fan Performance -- 48TJD016 (Low Heat Units)
Table 15 -- Fan Performance -- 48TJD020 and 024 (Low Heat Units)
Table 16 -- Fan Performance -- 48TJD028 (Low Heat Units)
Table 17 -- Fan Performance -- 48TJF016 (High Heat Units)
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Table 18 -- Fan Performance- 48TJF020 and 024 (High Heat Units)
Table 19 -- Fan Performance -- 48TJF028 (High Heat Units)
Table 20 -- Air Quantity Limits
Table 21 -- Accessory/FlOP Static Pressure* (in. wg) -- 48TJ016
Table 22 -- Accessory/FlOP Static Pressure* (in. wg) -- 48TJ020-028
Table 23 -- MoistureMi$er TM Dehumidification Package Static Pressure Drop (in. wg)
Table 24 -- Fan Rpm at Motor Pulley Settings*
Table 25 -- Evaporator-Fan Motor Data
Table 26 -- Evaporator-Fan Motor Efficiency
Operating Sequence
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Fig. 46 -- DX Cooling Temperature Control Example
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Fig. 49 -- Removing Heat Exchanger Ceramic Baffles and Clips
Lubrication
Evaporator Fan Performance Adjustment
(Fig. 50-52) -- Fan motor pulleys are factory set for speed
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Fig. 51 -- 48TJ016 Evaporator-Fan Motor Adjustment
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Fig. 52 -- 48TJ020-028 Evaporator-Fan Motor Section Fig. 50 -- Evaporator-Fan Pulley and Adjustment
Belt Tension Adjustment
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Main Burners
Filter Drier-
Protective Devices
Relief Devices
Control Circuit, 24-7--This
Optional Hinged Access Doors
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LEGEND AND NOTES FOR FIG. 58 AND 59
TROUBLESHOOTING
Unit Troubleshooting- Refer to Tables 27-29 and
EconoMi$erlV Troubleshooting-- See Table 30
Table 27 -- Cooling Service Analysis
Table 28 -- Heating Service Analysis
Table 29 -- MoistureMi$er TM Dehumidification Subcooler Service Analysis
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Table 30 -- EconoMi$erlV Input/Output Logic
Fig. 61 -- EconoMiSerlV Functional View
INDEX
SERVICE TRAINING
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START-UP CHECKLIST
PRE-START-UP
GENERAL [] ECONOMIZERMINIMUM VENTAND CHANGEOVERSETFINGS TOJOB REQUIREMENTS
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Table 30 -- EconoMi$erlV Input/Output Logic