Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480268-01 Printed in U.S.A. Form 48TC-17-30-V-05SI Pg 1 8-19 Replaces: 48TC-17-30-V-04SI
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Job-Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . 17
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . . 17
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 4 — Provide Unit Support. . . . . . . . . . . . . . . . . 17
• ROOF CURB MOUNT
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 22
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 22
• POSITIONING ON CURB
Step 7 — Install Outside Air Hood (Factory-
Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Step 8 — Install Flue Hood and Combustion Air
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 9 — Install Gas Piping. . . . . . . . . . . . . . . . . . . . 24
• GAS SUPPLY LINE
• FACTORY-OPTION THRU-BASE CONNECTIONS
Step 10 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Step 11 — Make Electrical Connections . . . . . . . . . 27
• FIELD POWER SUPPLY
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• TO FIELD INSTALL THE NFD SHAFT AND HANDLE:
• ALL UNITS
Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . . . 29
• INSTALLING WEATHERPROOF COVER
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
Humidi-MiZer® Control Connections . . . . . . . . . . . . 31
• HUMIDI-MIZER – SPACE RH CONTROLLER
EconoMi$er® X (Factory-Installed Option) . . . . . . . 33
• PRODUCT DESCRIPTION
• SYSTEM COMPONENTS
• SPECIFICATIONS
•INPUTS
•OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• S-BUS SENSOR WIRING
• CO2 SENSOR WIRING
• INTERFACE OVERVIEW
• USER INTERFACE
•KEYPAD
• MENU STRUCTURE
• SETUP AND CONFIGURATION
• TIME-OUT AND SCREENSAVER
• ENTHALPY SETTINGS
• TWO-SPEED FAN OPERATION
• CHECKOUT
• TROUBLESHOOTING
PremierLink™ Control . . . . . . . . . . . . . . . . . . . . . . . 46
RTU Open Control System. . . . . . . . . . . . . . . . . . . . 46
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
• RETURN AIR SENSOR TUBE INSTALLATION
• SMOKE DETECTOR TEST MAGNET
• ADDITIONAL APPLICATION DATA
Step 12 — Adjust Factory-Installed Options . . . . . 60
• ECONOMI$ER IV OCCUPANCY SWITCH
Step 13 — Install Accessories . . . . . . . . . . . . . . . . . 60
Step 14 — Check Belt Tension . . . . . . . . . . . . . . . . 60
• BELT FORCE — DEFLECTION METHOD
• BELT TENSION METHOD
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . 61
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 litera-
ture, tags and labels attached to the unit, and other safety precau-
tions that may apply.
48TC 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.
48TC 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.
WeatherMaker
®
48TC 17-30
Single Package Rooftop with Gas Heat/Electric Cooling
Vertical Air Flow Unit with Puron
®
(R-410A) Refrigerant
To Next Page
Need help?
General
