Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500213-01 Printed in U.S.A. Form 50KCQ-4-6-02SI Rev. A Pg 1 11-19 Replaces: 50KCQ-4-6-01SI
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . 2
REFRIGERATION SYSTEM COMPONENTS. . . . . . . 9
Typical Unit Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reversing Valve and Check Valve Position. . . . . . . 9
Troubleshooting Refrigerant Pressure Problems and
Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Refrigerant System Pressure Access Ports . . . . . . 9
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . 10
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation. . . 10
• 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
• FOR UNITS WITH ACCESSORY ELECTRIC HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 13
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (if required) . . . . . . . . . . . . . . . . . . . . . . 14
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 15
• ECONOMIZER HOOD PACKAGE REMOVAL AND
SETUP – FACTORY OPTION
• ECONOMIZER HOOD AND TWO-POSITION HOOD
Step 9 — Units with Hinged Panels Only. . . . . . . . . 16
Step 10 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Step 11 — Make Electrical Connections . . . . . . . . . 17
• 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
• COMMERCIAL DEFROST CONTROL
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
Control and Power Wiring Diagrams . . . . . . . . . . . 25
Economi$er® X (Factory Option) . . . . . . . . . . . . . . 30
• SYSTEM COMPONENTS
• SPECIFICATIONS
•INPUTS
•OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• INTERFACE OVERVIEW
• SETUP AND CONFIGURATION
• ENTHALPY SETTINGS
• CHECKOUT
• TROUBLESHOOTING
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
• ADDITIONAL APPLICATION DATA
PremierLink™ Controller (Factory Option) . . . . . . 41
RTU Open Controller (Factory-installed Option) . . 41
• CONTROLLER OPTIONS
Step 12 — Adjust Factory-Installed Options . . . . . 42
• SMOKE DETECTORS
• ECONOMI$ER IV OCCUPANCY SWITCH
Step 13 — Install Accessories. . . . . . . . . . . . . . . . . 42
Step 14 — Check Belt Tension . . . . . . . . . . . . . . . . 42
• BELT FORCE — DEFLECTION METHOD
• BELT TENSION METHOD
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . 42
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, re-
pair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions
of cleaning coils and filters and replacing filters. All other op-
erations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions 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 safe-
ty-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 signi-
fies hazards which could result in personal injury or death.
WeatherMaker
®
50KCQ*04-06
Single Package Rooftop Heat Pump
with Puron
®
(R-410A) Refrigerant
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