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Bryant
548D installation instructions
Models:
548D
1
39
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Troubleshooting
Damper Characteristics C. Optional EconoMi$er
Install
Wiring Diagram for Power Exhaust System
Dimension
Power Wiring Connections
Exhaust Air Hood Assembly
Default Potentiometer Settings
Indoor-FanPulley Adjustment
Heat Anticipator Settings
Page 39
Image 39
Page 38
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Image 39
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Contents
INSTALLATION
CONTENTS
III. Step 3 - Install Condensate Drain Line
SAFETY CONSIDERATIONS
Fig. 1 - Roof Curb Details
IV. STEP 4 - RIG AND PLACE UNIT
Fig. 3 - Condensate Drain Connection
Fig. 2 - Unit Leveling Tolerances
II. STEP 2 - FIELD FABRICATE DUCTWORK
Fig. 5 - Rigging Details
Fig. 6 - Base Unit Dimensions
Table 1 - Physical Data
A. Field Power Supply
Fig. 7 - Power Wiring Connections
V. STEP 5 - MAKE ELECTRICAL CONNECTIONS
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LEGEND AND NOTES FOR TABLES 2A AND 2B
A. Disconnect Switch
B. Field Control Wiring
D. Heat Anticipator Settings
VI. STEP 6 - ADJUST FACTORY-INSTALLEDOPTIONS
Table 3 - Heat Anticipator Settings
Fig. 10 — Defrost Board
Fig. 11 - Panel Locations
Fig. 15 - Horizontal Discharge Durablade
Fig. 14 - Durablade Economizer Installation
Economizer Installation
Fig. 12 - Outdoor-AirHood Details
Fig. 18 - Durablade Economizer Minimum
Minimum Position Setting
Position Damper Setting
Fig. 17 - Durablade Economizer Damper
Fig. 22 - EconoMi$er Component Locations
Damper Characteristics C. Optional EconoMi$er
Fig. 23 - Typical Access Panel Locations
Fig. 21 - Durablade Economizer Barometric Relief
Fig. 25 - Outdoor Air Hood Assembly
Fig. 28 - Rear EconoMi$er Flange Installation
Fig. 24 - Exhaust Air Hood Assembly
Fig. 29 - EconoMi$er Installed
Fig. 31 - EconoMi$er Sensor Wiring
Fig. 30 - EconoMi$er Wiring
Fig. 33 - Supply Air Sensor Mounting Location
Fig. 32 - Wiring Diagram for Power Exhaust System
VII. STEP 7 - ADJUST INDOOR-FANSPEED
Table 5 - Default Potentiometer Settings
Fig. 34 - EconoMi$er Control Adjustment
Potentiometers Factory Settings
Fig. 38 - Indoor-FanPulley Adjustment
Fig. 37 - Typical Belt-DriveMotor
Mounting for Size
Table 6 - indoor-FanMotor Performance
Table 7 - Fan Rpm at Motor Pulley Settings
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START-UP I. UNIT PREPARATION
V. INTERNAL WIRING
VI. REFRIGERANT SERVICE PORTS
PRE-START-UP
To Shut Off Unit
IX. ADJUST GAS INPUT
XII. SAFETY RELIEF
X. COOLING
F. Defrost
SERVICE
I. CLEANING
D. Cooling, Units With EconoMi$er
D. Filters
Fig. 39 - Cleaning Outdoor Coil
B. Outdoor Coils
C.Condensate Drain
A. Checking and Adjustment Refrigerant Charge
III.OUTDOOR FAN ADJUSTMENT Fig
Fig. 42 - Outdoor Fan Adjustment
IV. ECONOMIZER ADJUSTMENT
Fig. 45 — Cooling Charging Chart; 548D120
Fig. 44 - Cooling Charging Chart 548D102
Table 14 - Heating and Cooling Troubleshooting
TROUBLESHOOTING
Table 15 - Durablade Economizer Troubleshooting
Table 16 - EconoMi$er Troubleshooting
Fig. 46 - Typical Wiring Diagram
Fig. 46 - Typical Wiring Diagram cont
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III.START-UP
START-UPCHECKLIST Remove and Store in Job File
TEMPERATURES
I. PRELIMINARY INFORMATION
