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Carrier WeatherMaster Series - User Manual

Carrier WeatherMaster Series
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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........

Table of Contents

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Carrier WeatherMaster Series Specifications

General IconGeneral
BrandCarrier
ModelWeatherMaster Series
CategoryAir Conditioner
LanguageEnglish

Summary

Safety Considerations

Electrical Shock Hazard

Warnings about electrical hazards during installation and service operations.

Unit Operation and Safety Hazard

Hazards related to unit operation, refrigerant handling, and system damage.

Personal Injury and Environmental Hazard

General hazards for personnel and the environment, including refrigerant handling.

Cut Hazard

Warning about sharp sheet metal edges and potential injury during handling.

Installation

Jobsite Survey

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

Plan for Unit Location

Selecting a safe location with required clearances for performance and service.

Plan for Sequence of Unit Installation

Outlines installation sequences based on mounting methods like curb or pad.

Inspect Unit

Checking for transportation damage and verifying electrical specifications.

Provide Unit Support

Details on roof curb, slab, or alternate support systems for unit placement.

Field Fabricate Ductwork

Instructions for creating custom ductwork, including insulation and weatherproofing.

Rig and Place Unit

Guidance on lifting, positioning, and securing the unit safely on its support.

Convert to Horizontal and Connect Ductwork

Procedures for converting unit configuration and connecting ductwork.

Install Outside Air Hood

Instructions for assembling and installing the outside air hood assembly.

Install External Condensate Trap and Line

Requirements for an external condensate trap and proper drain line pitching.

Make Electrical Connections

Procedures for connecting field power supply and control wiring.

EconoMi$er X System

Product Description

Overview of the EconoMi$er X system and its economizing capabilities.

W7220 Economizer Module

Specifications and features of the W7220 control module.

Menu Structure

Hierarchy of menus for system configuration, setpoints, and operation.

Setup and Configuration

Steps to configure the W7220 module for the installed system's parameters.

Checkout

Procedures for testing system components, sensors, and configured outputs.

Troubleshooting

Guidance on diagnosing and resolving system issues, alarms, and errors.

PremierLink Controller

HVAC Sensor Inputs

List of available HVAC sensor inputs for the PremierLink controller.

Connect Thermostat

Wiring instructions for connecting a thermostat to the PremierLink controller.

Configure the Unit for Thermostat Mode

Steps to set up the PremierLink controller for thermostat operation mode.

Economizer Controls

Indoor Air Quality (CO2) Sensor

Details on monitoring space CO2 levels for indoor air quality control.

Outdoor Air Quality Sensor

Information on monitoring outdoor CO2 levels for ventilation control.

Space Relative Humidity Sensor or Humidistat Connections

Wiring for humidity sensors to manage the Humidi-Mizer system.

Smoke Detector;Fire Shutdown (FSD)

Function of smoke detectors for unit shutdown and alarm communication.

RTU Open Controller System

Field Connections

Wiring details for sensors and input devices to the RTU Open controller.

Space Temperature (SPT) Sensors

Information on SPT sensors and their wiring to the controller.

Indoor Air Quality (CO2) Sensor

Details on CO2 sensors for monitoring IAQ levels and their connection.

Connecting Discrete Inputs

Instructions for connecting filter status, fan status, and occupancy inputs.

Communication Wiring - Protocols

Information on network protocols and wiring for controller communication.

RTU Open Controller Troubleshooting

Guidance on troubleshooting RTU Open controller functions and communication.

Start-Up Checklist

I. PRE-START-UP

Checklist for verifying unit readiness before initial power-up.

II. START-UP

Procedures for electrical checks and recording operational data.

III. HUMIDI-MIZER SYSTEM START-UP

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

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