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York XT AHU User Manual

York XT AHU
118 pages
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LD17323
AIR HANDLING UNITS
OPERATION AND MAINTENANCE New Release Form 102.20-OM2 (615)
Issue Date:
June 1, 2015
LD09624
OUTDOOR SOLUTION XT AHUINDOOR SOLUTION XT AHU
YORK CUSTOM AHU
LD13282
Renewal Parts
With P/N contact Balt. Parts
(800) 932-1701
Manufactured or specialty
parts, contact Airside
Technical
Services (800) 545-7814

Table of Contents

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York XT AHU Specifications

General IconGeneral
Casing ConstructionDouble-wall
Casing MaterialGalvanized steel
Coil OptionsDX, chilled water, hot water, steam
Power Supply208-575V, 50/60Hz
InsulationFiberglass, Foam
ConstructionModular

Summary

GENERAL SAFETY GUIDELINES

SECTION 1 - GENERAL INFORMATION AND SAFETY

WARRANTY AND SAFETY RESPONSIBILITIES

Outlines warranty terms and defines user responsibilities for safe operation and maintenance.

SECTION 2 - START-UP AND OPERATION

BEFORE START-UP INSPECTION

Details pre-start-up inspection and checks for AHU installation and components.

INSPECTING FAN ASSEMBLY

Outlines procedures for inspecting the fan assembly for proper installation and condition.

START-UP PROCEDURES

General steps and precautions for initiating AHU operation.

FAN AND DAMPER OPERATION CHECKS

Procedures to verify fan and damper operation, including rotation and linkage.

AMS-60 AIRFLOW MONITORING DAMPER

Describes the AMS-60 damper, its operation, and notes that calibration is not required.

AMS-60 DAMPER OPERATION AND CALIBRATION

Details the AMS-60 damper's operation and notes calibration is not required.

VARIABLE FREQUENCY DRIVE (VFD) SETUP

Information on setting up and operating VFDs for AHU fan speed control.

AIRXCHANGE® ENERGY RECOVERY WHEEL START-UP

Step-by-step guide for starting up Airxchange® energy recovery wheels.

INNERGY TECH® ENERGY RECOVERY WHEEL START-UP

Procedures for starting up Innergy Tech® energy recovery wheels, including bearing checks.

THERMOTECH® ENERGY RECOVERY WHEEL START-UP

Detailed steps for starting up Thermotech® energy recovery wheels, including seal adjustment.

NOVELAIRE® TECHNOLOGIES ENERGY RECOVERY WHEEL START-UP

Procedures for starting up NovelAire® Technologies energy recovery wheels.

INDIRECT FIRED GAS HEAT START UP

Safety precautions and procedures for starting up indirect fired gas heat systems.

GAS HEAT START-UP SAFETY AND PROCEDURES

Safety precautions and procedures for starting up indirect fired gas heat systems.

GAS HEAT PRE-START-UP CHECKLIST

Checklist of items to verify before initiating gas heat system start-up.

BURNER INSPECTION PROCEDURES

Detailed steps for inspecting the burner before operation.

STARTING THE GAS BURNER

Procedures for safely starting and operating the gas burner.

GAS BURNER START-UP CHECKS AND ADJUSTMENTS

Checks and adjustments for burner operation, including gas pressure and draft.

BURNER OPERATION VERIFICATION

Further verification of burner operation, efficiency, and safety controls.

TYPICAL AHU WIRING DIAGRAM

Illustrates a general wiring diagram for the AHU.

STARTING THE ELECTRIC HEATER

Safety precautions and procedures for starting up electric heaters.

ELECTRIC HEATER ELECTRICAL INSTALLATION

Covers electrical connection requirements, wire sizing, and current calculations.

ELECTRIC HEATER AIR FLOW REQUIREMENTS AND START-UP

Specifies airflow requirements and starting procedures for electric heaters.

AHU OPERATION AND SAFETY WARNINGS

General operational warnings and procedures.

TEST AND BALANCE PROCEDURES

Discusses the importance of air balance, dynamic balance, and VFD effects.

MOTOR, BELT, AND SHEAVE CHECKS

Procedures for checking motors, belts, and sheaves for proper operation and alignment.

SECTION 3 - MAINTENANCE

GENERAL MAINTENANCE REQUIREMENTS

Outlines general maintenance tasks and frequencies based on ASHRAE standards.

FAN SEGMENT MAINTENANCE

Procedures for removing, checking, and maintaining the fan assembly.

BELT TENSIONING AND SHEAVE ALIGNMENT

Covers belt tensioning and sheave alignment procedures.

BELT TENSIONING PROCEDURES

Instructions for checking and adjusting belt tension using a tension gauge.

BELT REPLACEMENT AND SHEAVE ALIGNMENT FOR TOP MOUNT

Procedures for replacing belts and aligning sheaves on top mount motor bases.

BELT REPLACEMENT AND SHEAVE ALIGNMENT (CONTINUED)

Continues instructions for belt replacement and sheave alignment, including torque values.

AHU BEARING LUBRICATION

Guidelines for lubricating AHU bearings, identifying bearing types.

FAN BEARING LUBRICATION PROCEDURES

Procedures for lubricating fan bearings, including lube lines and grease.

MOTOR BEARING LUBRICATION

Explains why motor bearing lubrication is important and provides recommendations.

FILTER MAINTENANCE AND REPLACEMENT

Procedures for checking and replacing air filters.

FILTER TYPES AND REPLACEMENT

Discusses various filter types and procedures for checking and replacing air filters.

FILTER REPLACEMENT PROCEDURES

Step-by-step guide for replacing AHU filters.

COIL CLEANING PROCEDURES

Detailed steps for cleaning dehumidification and other coils.

MAINTENANCE REQUIREMENTS SUMMARY

A summary table of recommended maintenance procedures and frequencies.

SECTION 4 - SERVICE AND REPAIR

SERVICE TOOLS AND EQUIPMENT

Lists essential tools and equipment required for AHU service and repair.

SERVICE INFORMATION AND TROUBLESHOOTING OVERVIEW

General service information and an overview of troubleshooting common HVAC system issues.

SECTION 5 - WIRING DIAGRAMS

FULL VOLTAGE STARTER WIRING DIAGRAM

Illustrates the wiring for a full voltage starter.

FULL VOLTAGE STARTER WITH SINGLE POINT POWER CONNECTION

Wiring diagram for a single point power connection starter.

APPENDIX A – START-UP CHECKLIST

GENERAL UNIT INSPECTION AND PRE-STARTUP CHECKS

Checklist for general inspection and pre-start-up procedures for AHUs.

FAN INSPECTION AND START-UP PROCEDURES

Specific checks for fan inspection and steps for the start-up process.

APPENDIX B – LONG-TERM STORAGE

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