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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500282-01
Printed in U.S.A.
Form 50HCQ-12-03SI
Pg 1
5-2020
Replaces: 50HCQ-12-02SI
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 2
REFRIGERATION SYSTEM COMPONENTS . . . . . . . 6
Reversing Valve and Check Valve Position . . . . . . . 6
Troubleshooting Refrigerant Pressure Problems and
Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Plan for Unit Location . . . . . . . . . . . . . . . . 8
Plan for Sequence of Unit Installation . . . 8
Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8
Provide Unit Support . . . . . . . . . . . . . . . . . 8
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Field Fabricate Ductwork . . . . . . . . . . . . . 10
• UNITS WITH ACCESSORY ELECTRIC HEATERS
Rig and Place Unit . . . . . . . . . . . . . . . . . . 10
Convert to Horizontal and Connect
Ductwork (when required) . . . . . . . . . . . . . . . . . . 11
Install Outside Air Hood . . . . . . . . . . . . . . 12
• ECONOMIZER HOOD REMOVAL AND SETUP
• TWO-POSITION DAMPER HOOD REMOVAL AND
• ECONOMIZER AND TWO-POSITION HOOD
Install External Condensate Trap and Line 14
Make Electrical Connections . . . . . . . . . 14
• UNITS WITHOUT FACTORY-INSTALLED NON-
• UNITS WITH FACTORY-INSTALLED NON-FUSED
• FACTORY-OPTION THRU-BASE CONNECTIONS
• UNITS WITHOUT THRU-BASE CONNECTIONS
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• CONTROL AND POWER WIRING DIAGRAMS
• ECONOMI$ER® X (FACTORY OPTION)
• PREMIERLINK™ (FACTORY OPTION)
• RTU OPEN CONTROLLER (FACTORY OPTION)
Adjust Factory-Installed Options . . . . . .43
• ECONOMI$ER IV OCCUPANCY SWITCH
Install Accessories . . . . . . . . . . . . . . . . .43
Check Belt Tension . . . . . . . . . . . . . . . . .44
• BELT FORCE — DEFLECTION METHOD
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .45
START-UP CHECKLIST FOR 50HCQ12 SINGLE
(REMOVE AND USE FOR JOB FILE) . . . . . . . . . .47
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, 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 qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual 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. Consult 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, 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.
50HCQ12
Single Package Rooftop Heat Pump
with Puron
®
(R-410A) Refrigerant
Summary of Contents for 50HCQ12
Page 4: ...4 Fig 2 Unit Dimensional Drawing Size 12 Units ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing Size 12 Units cont ...
Page 9: ...9 Fig 6 Roof Curb Details REV 50TM500827 ...
Page 25: ...25 Fig 42 Typical 50HCQ Control Wiring Diagram ...
Page 26: ...26 Fig 43 Typical 50HCQ Power Wiring Diagram 208 230 3 60 unit shown ...
Page 27: ...27 Fig 44 PremierLink Controller Wiring Schematic ...
Page 28: ...28 Fig 45 RTU Open Controller System Wiring Diagram ...