
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53390026-01 Printed in U.S.A. Form 39M-23SI Rev. C Pg 1 6-22 Replaces: 39M-20SI
Installation, Start-Up and
Service Instructions
CONTENTS
Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 3
UNIT AND COMPONENT IDENTIFICATION . . . . . . . . 4
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 89
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Rigging and Handling . . . . . . . . . . . . . . . . . . . . . . . . 89
Long-Term Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Service Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Drain Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Unit Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Internal Vibration Isolation . . . . . . . . . . . . . . . . . . . . 90
• REMOVING HOLDDOWN BOLTS, AIRFOIL, PLENUM
AND FORWARD-CURVED FANS
• ADJUSTING ISOLATOR SPRINGS
External Vibration Isolation . . . . . . . . . . . . . . . . . . . 90
Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Pier or Beam Mount . . . . . . . . . . . . . . . . . . . . . . . . . 91
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Indoor and Outdoor Unit Shipping Split (All Sizes) 92
• NON-STACKED UNITS
• STACKED UNITS
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
• MIXING BOX/INLET PLENUM/DISCHARGE
PLENUM/EXTERNAL BYPASS/RETURN FAN
• MIXING BOX/INLET PLENUM/DISCHARGE PLENUM
(BOTTOM)
• HOUSED FAN DISCHARGE CONNECTIONS (NOT
PLENUM FANS)
• BOTTOM RETURN FAN CONNECTIONS
• PLENUM FAN DUCT CONNECTIONS
• DRAW-THRU PLENUM FAN DISCHARGE
FABRICATION
Panel Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Face and Bypass Dampers . . . . . . . . . . . . . . . . . . 102
Zone Damper Section . . . . . . . . . . . . . . . . . . . . . . . 105
• ZONE DAMPER LINKAGE
Mixing Box/Filter Mixing Box Damper Linkage . . 105
• CONTROL DAMPERS
• DAMPER LINKAGE ADJUSTMENT
• LINKAGE ADJUSTMENT
• FIELD SUPPLIED AND INSTALLED ACTUATORS
Mixing Box Damper Actuators . . . . . . . . . . . . . . . . 109
Vertical Draw-Thru Units . . . . . . . . . . . . . . . . . . . . 109
STACKED Supply Fan, RETURN FAN AND EXHAUST
BOX SECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Stacked Units Turning Plenum . . . . . . . . . . . . . . . 109
Fan Sled Disassembly . . . . . . . . . . . . . . . . . . . . . . 111
Fan Sled Dimensions . . . . . . . . . . . . . . . . . . . . . . . .111
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . .116
• JUNCTION BOX CONDENSATE PREVENTION
Motor Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . .117
• SINGLE POINT POWER WIRING
• EC MOTOR FAN POWER BOX WIRING
• MOTOR OVERLOAD PROTECTION
Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
• ALIGNMENT
V-Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
• TENSION MEASUREMENT PROCEDURE
Direct Drive Fan Alignment . . . . . . . . . . . . . . . . . . .120
Fan Airflow Measurement Piezometer Ring . . . . .120
• CALCULATION WHEN USING THE PIEZOMETER
Outdoor Hoods and Louvers . . . . . . . . . . . . . . . . .120
Coil Connection Housing
(Outdoor Unit — All Sizes) . . . . . . . . . . . . . . . . .121
Power Exhaust Hood Field Installation . . . . . . . . .125
Humidifier Installation . . . . . . . . . . . . . . . . . . . . . . .128
• ASSEMBLE CONTROL VALVE ASSEMBLY
• ASSEMBLE STRAINER AND TRAP ASSEMBLY AND
VALVE ASSEMBLY
Assembly of Vertical Manifolds . . . . . . . . . . . . . . .131
Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .131
• INSTALLATION OF SINGLE HEIGHT COILS
• INSTALLATION OF STACKED COILS
Water and Steam Coil Piping Recommendations .134
• GENERAL
• WATER COILS
• STEAM COILS
Coil Freeze-Up Protection . . . . . . . . . . . . . . . . . . . .136
• WATER COILS
• STEAM COILS
• INNER DISTRIBUTING TUBE STEAM COILS
Refrigerant Piping, Direct-Expansion Coils . . . . .137
• SUCTION PIPING
Distributor Nozzle Change-Out . . . . . . . . . . . . . . . .138
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
TXV (Thermostatic Expansion Valve) . . . . . . . . . .139
• TXV LOCATION
• SOLDER TECHNIQUES
• TXV BULB LOCATION AND INSTALLATION
• EXTERNAL EQUALIZER CONNECTION
• OIL RETURN CONNECTION
• EXPANSION VALVE ADJUSTMENT
Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
• SPECIAL PIPING WITH 4 SPLITS PER COIL
• SPECIAL PIPING FOR DOUBLE-CIRCUIT COILS
Hot Gas Bypass Piping and Wiring . . . . . . . . . . . .143
Aero®
39MN,MW03-110
Indoor and Weathertight Outdoor
Air Handlers