Carrier WeatherMaker 48KC Series User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480188-01 Printed in U.S.A. Form 48KC-4-6-03SI Pg 1 11-18 Replaces: 48KC-4-6-02SI
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . .1
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Jobsite Survey. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Step 1 — Plan for Unit Location. . . . . . . . . . . . . . . . . . .6
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation. . .7
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . .7
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB
OR SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . . .9
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . .9
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . .11
• ECONOMIZER AND TWO-POSITION DAMPER
HOOD PACKAGE REMOVAL AND SETUP
(FACTORY OPTION)
• ECONOMIZER AND TWO-POSITION HOOD
Step 9 — Units with Hinged Panels Only . . . . . . . . .12
Step 10 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . .12
Step 11 — Install Gas Piping. . . . . . . . . . . . . . . . . . . . .13
• FACTORY-OPTION THRU-BASE CONNECTIONS
(GAS CONNECTIONS)
Step 12 — Install External Condensate Trap
and Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Step 13 — Make Electrical Connections . . . . . . . . .16
• FIELD POWER SUPPLY
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT OR HACR
• UNITS WITHOUT FACTORY-INSTALLED NON-
FUSED DISCONNECT OR HACR
•ALL UNITS
• CONVENIENCE OUTLETS
• HACR AMP RATING
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• UNITS WITHOUT THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
• FIELD CONTROL WIRING
• THERMOSTAT
• HEAT ANTICIPATOR SETTINGS
• HUMIDI-MIZER
®
CONTROL CONNECTIONS
• TYPICAL UNIT WIRING DIAGRAMS
Low Ambient Control (Factory Option). . . . . . . . . . .27
Integrated Gas Controller . . . . . . . . . . . . . . . . . . . . . . . .27
Economi$er
®
(Factory Option) . . . . . . . . . . . . . . . . . . .29
Page
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 40
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Premierlink™ (Factory Option) . . . . . . . . . . . . . . . . . . 40
RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . 40
Step 14 — Adjust Factory-Installed Options . . . . . 41
Step 15 — Install Accessories . . . . . . . . . . . . . . . . . . . 41
Step 16 — Check Belt Tension . . . . . . . . . . . . . . . . . . . 42
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.
WARNING
Electrical shock can cause personal injury and death. Shut off
all power to this equipment during installation and service.
There may be more than one disconnect switch. Tag all dis-
connect locations to alert others not to restore power until
work is completed.
WeatherMaker
®
48KC04-06 Single Package Rooftop
Gas Heating/Electric Cooling Unit
with Puron
®
(R-410A) Refrigerant

Carrier WeatherMaker 48KC Series Specifications

General

Brand	Carrier
Model	WeatherMaker 48KC Series
Category	Air Conditioner
Language	English

Summary

Safety Considerations

General Safety Information

General safety precautions, warnings, and symbols for installation and maintenance.

Unit Overview and Specifications

Model Number Nomenclature

Explanation of the 48KC model number structure and its components.

Rated Indoor Airflow

Table detailing the rated indoor airflow for different 48KC models for efficiency ratings.

Unit Dimensional Drawings

Visual representation of unit dimensions, clearances, and connection points.

Installation Planning

Jobsite Survey

Pre-installation checks including local codes, unit location, and overhead obstructions.

Plan Installation Sequence

Sequence planning for unit installation based on support method, e.g., curb or pad mount.

Inspect Unit

Inspecting unit for transportation damage and verifying electrical requirements before installation.

Provide Unit Support

Details on supporting the unit, including roof curb installation and leveling tolerances.

Physical Installation

Field Fabricate Ductwork

Guidelines for fabricating supply ductwork, ensuring proper dimensions and insulation.

Rig and Place Unit

Safe rigging and placement procedures for the unit, emphasizing caution with roofing materials.

Convert to Horizontal Ductwork

Instructions for converting the unit to a horizontal duct configuration when required.

Install Outside Air Hood

Procedures for assembling and installing the outside air hood, including economizer options.

Install Flue Hood

Instructions for installing the flue hood and screen, ensuring proper connection.

Install Gas Piping

Guidelines for gas piping installation, including codes, pressure, and connections.

Install Condensate Trap and Line

Procedures for installing the external condensate trap and line, including pitch and trap depth.

Make Electrical Connections

Detailed instructions for making electrical connections, including power supply and wiring.

Economizer and Control Systems

Economizer Module Overview

Introduction to the W7220 economizer module and its basic functions.

Economizer Sensors

Details on available sensors for economizer control, including enthalpy and CO2.

Economizer Module Wiring

Guide to wiring terminals for the economizer module and sensors.

Economizer Checkout and Alarms

Procedures for testing economizer operation and clearing alarms.

Specific Control Features

Outdoor Air Enthalpy Control

Operation and wiring of the outdoor air enthalpy control system.

Smoke Detectors

Information on factory-installed smoke detectors and their function.

Smoke Sensor Installation

Steps for completing the installation of the return air smoke sensor assembly.

Final Installation Steps

Adjust Factory-Installed Options

Adjusting factory options like smoke detectors and economizer occupancy switches.

Install Accessories

Information on available accessories and their installation guidance.

Check Belt Tension

Procedure for checking and adjusting belt tension using force deflection method.

Start-Up Checklist

Preliminary Information

Section for recording unit model, job name, serial number, address, and technician details.

Pre-Start-Up Checks

Verifying unit readiness, including packaging removal, hood installation, and electrical checks.

Start-Up Procedures

Steps for initial unit start-up, including electrical and temperature readings.

Humidi-Mizer Start-Up

Specific start-up steps and observations for the Humidi-Mizer system.