Installation Instructions
50HC
WeatherMaster
R
Series
Single Package Rooftop
Cooling Only
with Puronr (R ---410A) Refrigerant
Sizes 07, 08, 09, 11, 12
50HC 11 and 12 size units for installation in the United States contain use of Carrier's Staged
Air Volume (SAV™) 2-speed indoor fan control system. This complies with the U.S.
Department of Energy (DOE) efficiency standard of 2018.
50HC 11 and 12 size units for installation outside the United States may or may not contain
use of the SAV 2-speed indoor fan control system as they are not required to comply with the
U.S. Department of Energy (DOE) efficiency standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the
Variable Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation,
Setup and Troubleshooting manual.
NOTE: Read the entire instruction manual before starting
the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 3....................
Rated Indoor Airflow (cfm) 4.....................
INSTALLATION 9...............................
Jobsite Survey 9................................
Step 1 -- Plan for Unit Location 9..................
Roof Mount 9...............................
Step 2 -- Plan for Sequence of Unit Installation 9......
Curb--Mounted Installation 10..................
Pad--Mounted Installation 10...................
Frame--Mounted Installation 10.................
Step 3 -- Inspect Unit 10..........................
Step 4 -- Provide Unit Support 10..................
Roof Curb Mount 10.........................
Slab Mount (Horizontal Units Only) 10..........
Alternate Unit Support
(In Lieu of Curb or Slab Mount) 12.............
Step 5 -- Field Fabricate Ductwork 12...............
For Units with Accessory or Optional
Electric Heaters 12...........................
Step 6 -- Rig and Place Unit 12....................
Positioning on Curb 13.......................
Step 7 -- Convert to Horizontal and Connect Ductwork 13
Step 8 -- Install Outside Air Hood 14...............
Economizer and Two Pos itio n Damper Ho od
Pack age Removal and Setup — Factor y Option 14..
Economizer Hood and Two--Position Hood 14.....
Step 9 -- Install External Condensate Trap and Line 15...
Step 10 -- Make Elect rical Connections 15...........
Field Power Supply 15........................
Units with Factory-- Installed
Non--Fused Disconnect or HACR 16.............
Units without Factory --Installed
Non--Fused Disconnect or HACR 18.............
All Units 18................................
Convenie nce Outlets 18.......................
HACR 20..................................
Factory--Option Thru--Base Connections 20......
Units without Thru--Base Connections 20.........
Field Control Wiring 20.......................
Thermostat 20...............................
Central Terminal Board 21....................
Unit without Thru--Base Connection Kit 21.......
Heat Anticipator Settings 21...................
Electric Heaters 21............................
Single Point Boxes and Supplementary Fuses 22...
Single Point Boxes without Fuses 22............
Low--Voltage Control Connections 22............
Humidi--MiZer
R
System Control Connections 23....
Humidi--MiZer -- Space RH Controller 23........
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