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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. 04-53480222-01
Printed in U.S.A.
Form 48HC-14-04SI
Pg 1
2-19
Replaces: 48HC-14-03SI
Installation Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . 7
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation . . . . 7
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . 8
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 10
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 10
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (When Required). . . . . . . . . . . . . . . . . . 11
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 12
• ECONOMIZER HOOD REMOVAL AND SETUP —
FACTORY OPTION
• TWO POSITION DAMPER HOOD REMOVAL AND
SETUP — FACTORY OPTION
• ECONOMIZER HOOD AND TWO-POSITION HOOD
Step 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 14
Step 10 — Install Gas Piping. . . . . . . . . . . . . . . . . . . 14
• FACTORY OPTION THRU-BASE CONNECTIONS
(GAS CONNECTION)
Step 11 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 12 — Make Electrical Connections . . . . . . . . . 18
• FIELD POWER SUPPLY
• ALL UNITS
• UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT OR HACR CIRCUIT BREAKER
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR CIRCUIT BREAKER
• CONVENIENCE OUTLETS
• HACR CIRCUIT BREAKER
• FACTORY OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Humidi-MiZer® System Control Connections . . . . .28
• HUMIDI-MIZER — SPACE RH CONTROLLER
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .30
• SYSTEM COMPONENTS
• SPECIFICATIONS
• INPUTS
• OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• INTERFACE OVERVIEW
• SETUP AND CONFIGURATION
• ENTHALPY SETTINGS
• TWO-SPEED FAN OPERATION
• CHECKOUT
• TROUBLESHOOTING
Low Ambient Control (Factory Option). . . . . . . . . . .43
Staged Air Volume (SAV™) with Variable Frequency
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . .43
ComfortLink Controls (Factory Option) . . . . . . . . . .43
PremierLink™ Controller (Factory Option) . . . . . . .47
RTU Open Controller System (Factory-Installed
Option). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
• ADDITIONAL APPLICATION DATA
Step 13 — Adjust Factory-Installed Options . . . . . .48
• SMOKE DETECTORS
• ECONOMI$ER IV OCCUPANCY SWITCH
Step 14 — Install Accessories . . . . . . . . . . . . . . . . . .48
Step 15 — Check Belt Tension . . . . . . . . . . . . . . . . .48
• BELT FORCE — DEFLECTION METHOD
• BELT TENSION METHOD
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .49
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
48HC 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.
48HC 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.
WeatherMaster
®
48HC14
Single Package Rooftop Gas Heat/Electric Cooling
Unit with Puron
®
(R-410A) Refrigerant
Summary of Contents for WeatherMaster 48HC14
Page 5: ...5 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 6: ...6 Fig 2 Unit Dimensional Drawing 14 Size Unit cont ...
Page 9: ...9 Fig 4 Roof Curb Details ...
Page 25: ...25 Fig 48 48HC 14 Controls Wiring Diagram 208 230 v 460 v 575 v ...
Page 26: ...26 Fig 49 48HC 14 Power Wiring Diagram 208 230 v 460 v ...
Page 27: ...27 Fig 50 48HC 14 Power Wiring Diagram 575 v ...
Page 29: ...29 Fig 53 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 44: ...44 Fig 62 48HC14 ComfortLink Control Wiring Diagram ...
Page 45: ...45 Fig 63 48HC14 ComfortLink Power Wiring Diagram ...
Page 46: ...46 Fig 64 48HC14 ComfortLink with Humidi MiZer Power Wiring Diagram ...