Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500199-01 Printed in U.S.A. Form 50KC-4-6-02SI Pg 1 11-18 Replaces: 50KC-4-6-01SI
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 1
MODEL NUMBER NOMENCLATURE
AND DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . 2
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
JOBSITE SURVEY . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . 6
• ROOF MOUNT
Step 2 — Plan for Sequence of
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . 6
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Provide Unit Support. . . . . . . . . . . . . . . . 7
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . 9
• FOR UNITS WITH ACCESSORY ELECTRIC
HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . 9
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 8 — Install Outside Air Hood . . . . . . . . . . . . 11
• ECONOMIZER HOOD PACKAGE REMOVAL AND
SETUP — FACTORY OPTION
• ECONOMIZER HOOD ASSEMBLY
Step 9 — Units with Hinged Panels Only. . . . . . . 12
Step 10 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 11 —Make Electrical Connections . . . . . . . 13
• FIELD POWER SUPPLY
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT
• ALL UNITS
• CONVENIENCE OUTLETS
• FACTORY-OPTION THRU-BASE CONNECTIONS
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
Humidi-MiZer
®
Control Connections . . . . . . . . . .19
• HUMIDI-MIZER — SPACE RH CONTROLLER
Control and Power Wiring Diagrams . . . . . . . . . .18
EconoMi$er
®
X (Factory-Installed Option) . . . . . .29
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . .38
PremierLink™ Controller (Factory Option) . . . . .38
RTU Open Controller (Factory-Installed
Option). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Controller Options . . . . . . . . . . . . . . . . . . . . . . . . .38
• LOW AMBIENT
Step 12 — Adjust Factory-Installed Options . . . .39
Step 13 — Install Accessories. . . . . . . . . . . . . . . .39
Step 14 — Check Belt Tension . . . . . . . . . . . . . . .39
Evaporator Coil Metering Devices . . . . . . . . . . . .40
Pre-Start and Startup . . . . . . . . . . . . . . . . . . . . . . .40
UNIT START-UP CHECKLIST. . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The quali-
fied installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the indi-
vidual instructions packaged with the kits or accessories
when installing.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly
and follow all warnings or cautions attached to the unit. Con-
sult local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA70, National Electrical Code
(NEC); in Canada, CSA C22.1) for special requirements.
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, CAU-
TION, 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 sig-
nifies 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 dam-
age. NOTE is used to highlight suggestions which will result
in enhanced installation, reliability, or operation.
50KC04-06
Single Package Rooftop Cooling Only
with Puron
®
(R-410A) Refrigerant
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