Contents
Main
Installation, Start-Up and Service Instructions
CONTENTS
SAFETY CONSIDERATIONS
39LA,LB,LC,LD,LF,LG,LH03-25 Indoor Air-Handling Units
INTRODUCTION Unit Identification
39L C 10 GK C H E A C G - A
Page
PREINSTALLATION
Rigging (Fig. 5)
Suspended Units
Service Clearance
Condensate Drain
Fig. 4 Service Area Requirements
DIMENSIONS (ft-in.)
DIMENSIONS (mm)
Table 1 Physical Data
Page
INSTALLATION Mixing Box
Condensate Drain
Table 3 Recommended Actuators
DIMENSIONS (ft-in.)
Fig. 10 Mixing Box Duct Connections
Inlet Guide V ane (IGV) Actuators
Install Fan Motor
Install Sheaves on Motor and Fan Shafts
Install V -Belts
Fig. 15 Fan Belt Tension Data
Fig. 16 Fan Section Label
Deflection = (Belt Span) 64 Deflection = 16 64
Fig. 14 Sheave Alignment
NOTICE
REPLACEMENT PARTS
Water and Steam Coil Piping Recommendations
Coil Freeze-Up Protection
Page
Fig. 19 Dripping Steam Supply to Condensate Return
Fig. 20 Multiple Coil High Pressure Piping
Fig. 22 Condensate Lift to Overhead Return
Fig. 21 Multiple Coil Low Pressure Piping Gravity Return
Refrigerant Piping, Direct-Expansion (DX) Coils (Fig. 23)
Table 4 Hot Water Coil Circuiting Data
Table 5 Chilled Water Coil Circuiting Data
Fig. 23 Typical Direct-Expansion Row Split Coil
Table 5 Chilled Water Coil Circuiting Data (cont)
Table 6 Steam Coil Connection Sizes
LEGEND NOTE: Connection sizes are MPT - inches.
DDouble Circuit FFull Circuit HHalf Circuit QQuarter Circuit
Page
Table 7 Direct Expansion Coil Circuiting Data
Table 7 Direct Expansion Coil Circuiting Data (cont)
Table 8 Distributor Part Numbers
Table 9 Side Connector (Hot Gas Bypass) Data
DIMENSIONS (in.)
Fig. 27 Expansion Valve Piping
Fig. 28 Distributor and Hot Gas Bypass Auxiliary Side Connector
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Page
Electric Heater s
Page
Table 10 Electric Heater Data
LEGEND
Discharge Modification
START-UP Check L ist
SERVICE General
Fan Motor Replacement
Coil Cleaning
Winter Shutdown (Chilled W ater Coil Only)
Field-Installed Coils (39LA,LD Only)
Coil Removal
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Page
Page
Changing Coil Hand
Filters
Fan Shaft Bearing Removal
Table 12 Filter Data
*Only 2-in. filters are available on size 03.
Fig. 43 Filter Arrangement, 2-in. and 4-in. Flat
SIZE 21
SIZE 25
Fan and Shaft Remo v al (Fig. 44)
Lubrication