Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480421-01 Printed in U.S.A. Form No. 48FC-8-14-02SI Rev. A Pg 1 3-24 Replaces: 48FC-8-14-01SI
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . 11
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . 11
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . 11
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 13
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 13
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (When Required) . . . . . . . . . . . . . . . . . 14
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 15
• ECONOMIZER HOOD PACKAGE REMOVAL
(FACTORY OPTION)
• ECONOMIZER HOOD SETUP
Step 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 16
Step 10 — Install Gas Piping . . . . . . . . . . . . . . . . . . 16
• FACTORY-OPTION THRU-BASE GAS CONNECTIONS
Step 11 — Install External Condensate
Trap and Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Step 12 — Make Electrical Connections . . . . . . . . . 20
• FIELD POWER SUPPLY
• FIELD POWER WIRING CONNECTION
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• UNITS WITHOUT FACTORY-INSTALLED
NON-FUSED DISCONNECT
• FIELD WIRING COMPLIANCE
• CONVENIENCE OUTLETS
• ALL UNITS
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• HUMIDI-MIZER® CONTROL CONNECTIONS
• TYPICAL UNIT WIRING DIAGRAMS
Integrated Gas Controller . . . . . . . . . . . . . . . . . . . . . 31
Humidi-MiZer Dehumidification System
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
• NORMAL COOLING
• DEHUM/MECH COOLING (SUBCOOLING) MODE
• DEHUMIDIFICATION (HOT GAS REHEAT) MODE
• REHEAT CONTROL
EconomizerONE (Factory Option) . . . . . . . . . . . . . .35
• ECONOMIZER SETTINGS
•WIRING
• SETUP AND CONFIGURATION
• INSTALLING OPTIONAL HH57LW001 SINGLE
OUTSIDE AIR ENTHALPY SENSOR
• CHECKOUT
• TROUBLESHOOTING
SystemVu™ Controller (Factory Option) . . . . . . . . .56
• SMOKE DETECTORS
• COMPLETING INSTALLATION OF RETURN-AIR
SMOKE SENSOR
• ADDITIONAL APPLICATION DATA
Step 13 — Adjust Factory-Installed Options . . . . . .57
• SMOKE DETECTORS
• ECONOMIZERONE OCCUPANCY SWITCH
Step 14 — Install Accessories . . . . . . . . . . . . . . . . .57
Step 15 — Fan Speed Set Up . . . . . . . . . . . . . . . . . .57
• UNITS WITH ELECTRO-MECHANICAL CONTROLS
• UNITS WITH SYSTEMVU™ CONTROLS
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol . When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
WeatherMaker
®
48FC 08-14
Single Package Rooftop with
Gas Heat/Electric Cooling
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