516 01 3604 04
7/2020
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 1
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
Refrigerant System Pressure Access Ports . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 1 — Plan for Unit Location . . . . . . . . . . . . 8
Step 2 — Plan for Unit InstallationSequence . . 8
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . 8
Step 4 — Provide Unit Support . . . . . . . . . . . . . 8
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
Step 5 — Field Fabricate Ductwork . . . . . . . . . 10
• UNITS WITH ACCESSORY ELECTRIC HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . 10
Step 7 — Convert to Horizontal and Connect
Ductwork (when required) . . . . . . . . . . . . . . 11
Step 8 — Install Outside Air Hood . . . . . . . . . 12
• ECONOMIZER HOOD REMOVAL AND SETUP
• TWO-POSITION DAMPER HOOD REMOVAL AND
• ECONOMIZER AND TWO-POSITION HOOD
Step 9 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Step 10 — 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$er® X (Factory Option) . . . . . . . . . . 27
• ECONOMIZER MODULE WIRING DETAILS
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . 40
• COMPLETING RETURN AIR SMOKE SENSOR
• 2-SPEED INDOOR FAN MOTOR SYSTEM WITH
VARIABLE FREQUENCY DRIVE (FACTORY-IN
Step 11 — Adjust Factory-Installed Options . 40
• ECONOMI$ER IV OCCUPANCY SWITCH
Step 12 — Install Accessories . . . . . . . . . . . . 41
Step 13 — Check Belt Tension . . . . . . . . . . . . 41
• BELT FORCE — DEFLECTION 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, 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.
RHH120
Single Package Rooftop Heat Pump
with R-410A Refrigerant
