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Addison DC Series User Manual

Addison DC Series
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1
WARNING: READ SAFE OPERATION RULES AND MANUAL CAREFULLY
INSTALLATION OPERATION and MAINTENANCE MANUAL
High Efficiency Packaged Models DC Series B, Air Conditioning
Systems, Model Sizes 036 Thru 420
No Heat Recovery Cabinet
Extended Heat Recovery Cabinet
TABLE OF CONTENTS
Safety Labeling and Signal Words...........2
General Description ..................................3
Unpacking, Inspection ........................3
Design Certification..............................3
Codes & Ordinances ............................3
Installation..............................................3- 6
Unit Location, Clearances ...................3
Curb Installation ...................................3
Rigging...................................................4
Electrical................................................4
Ductwork ...............................................5
Condensate Piping ...............................5
Gas Piping and Venting ...................5- 6
Cooling System Options.......................6- 8
Hot Gas Bypass ....................................6
Head Pressure Control.........................6
Variable Speed Control ........................6
Adjustable High and Low Pressure....7
Hot Water Heat Recovery.................7, 8
Mechanical Adjustments ....................9, 10
Evaporator Blower Fan ..................9, 10
Electrical System Options ......................10
Air Flow Switch...................................10
Clogged Filter Indicator ..........................10
Convenience Outlet............................10
Exhaust Fan Interlock ........................10
Power Through the Curb ...................10
Firestat.................................................10
Sure-Trip
TM
..........................................10
DDC controls.......................................10
Sequence of Operation...........................11
Heating, Steam/Hydronic...................11
Gas Heat ..............................................11
Electric Heat........................................11
Energy Conservation Wheel..............12
Trouble Shooting Guides...................13-18
General Refrigeration Circuit .......13-16
Varispeed™ Condenser Control.......15
Hot Gas Bypass Regulator ................16
Gas Furnace........................................17
!
R410A
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Addison DC Series Specifications

General IconGeneral
BrandAddison
ModelDC Series
CategoryAir Conditioner
LanguageEnglish

Summary

Safety Labeling and Signal Words

Danger, Warning, and Caution Signal Words

Defines the signal words DANGER, WARNING, and CAUTION for hazard levels.

Signal Words in Manuals

Explains the usage of signal words within the manual text.

Danger Label Appearance

Describes the visual characteristics of a DANGER label.

Warning Label Appearance

Describes the visual characteristics of a WARNING label.

Caution Label Appearance

Describes the visual characteristics of a CAUTION label.

Environmental and Safety Precautions

Covers warnings about refrigerants and environmental impact.

General Description

Unpacking and Inspection

Procedure for checking unit condition upon receipt.

Design Certification

Details on unit certifications and standards compliance.

Installation

Unit Location and Clearances

Requirements for unit placement and minimum spacing.

Codes and Ordinances

Compliance with installation regulations and codes.

Curb Installation and Protrusions

Procedures for mounting units on roof curbs.

Rigging Procedures

Guidelines for safely lifting and moving the unit.

Rigging Removal

Steps for safely detaching rigging equipment.

Ductwork Installation

Guidelines for connecting duct systems to the unit.

Condensate Piping

Requirements for condensate drainage and piping.

Clearances

Minimum spacing requirements for access and safety.

Combustion Air Clearances

Specific clearances for combustion air intake.

Electrical

Wiring Connections

Details on power and low voltage wiring procedures.

Independent Power Source

Recommendation for a separate power source for service.

Main Power Wiring

Requirements for unit power supply connections.

Grounding Requirements

Electrical grounding standards and procedures.

Control System Wiring

Guidelines for low voltage control wiring.

Gas Piping and Venting

Gas Furnace Installation

Specific installation requirements for gas furnace models.

Cooling System Options

Hot Gas Bypass Operation

Description of capacity control using hot gas bypass.

Head Pressure Control

Methods for maintaining optimal head pressure.

Variable Speed Control

Management of variable speed fan operation.

Adjustable High and Low Pressure Switches

Settings for pressure-sensitive safety switches.

Mechanical Adjustments

Setting Fan RPM

Procedure for adjusting evaporator fan speed.

Fan Rotation Check

Verifying correct blower motor rotation direction.

Drive Belt Tension and Alignment

Procedures for maintaining drive belt tension and alignment.

Checking Pulley Alignment

Procedure to verify pulley alignment for optimal performance.

Checking Tension and Deflection

Method for checking drive belt tension and deflection.

Electrical System Options

Airflow Switch

Safety feature to ensure blower operation.

Clogged Filter Indicator

System for detecting and signaling dirty filters.

Convenience Outlet

Electrical outlet for service and maintenance use.

Exhaust Fan Interlock

Integration with building exhaust fans for safety.

Power Through the Curb

Method for routing wiring through the roof curb.

Firestat Control

Safety control monitoring return air temperature.

Sure-Trip™™ Control

Automatic safety shutdown for electrical power issues.

DDC Controls

Overview of direct digital control system integration.

Sequence of Operation

Heating: Hydronic or Steam

Operational sequence for hydronic and steam heating modes.

Gas Heat Operation

Operational sequence for gas heating functions.

Electric Heat Operation

Operational sequence for electric heating functions.

Energy Conservation Wheel

Seal Checks and Adjustments

Procedures for checking and adjusting ECW seals.

Variable Speed Drive (VFD) Configuration

Setup and programming for VFD control.

Maintenance Procedures

Guidelines for unit maintenance, including bearings and motors.

Trouble Shooting Guides

Compressor Start Issues

Diagnosing problems when the compressor fails to start.

Low Pressure Switch Cutouts

Troubleshooting compressor cutouts related to low pressure.

High Pressure Switch Cutouts

Troubleshooting compressor cutouts related to high pressure.

Thermal Overload Issues

Addressing compressor thermal overload trips.

Oil Failure Control Problems

Diagnosing issues with the oil failure control system.

Noisy Compressor Diagnosis

Identifying causes of abnormal compressor noise.

Noisy Unit Operation

Troubleshooting general unit noise and vibrations.

High Suction Pressure Issues

Diagnosing and resolving high suction pressure conditions.

High Discharge Pressure Issues

Diagnosing and resolving high discharge pressure conditions.

Low Suction Pressure Issues

Diagnosing and resolving low suction pressure conditions.

Low Head Pressure Issues

Diagnosing and resolving low head pressure conditions.

Compressor Short Cycling

Troubleshooting frequent compressor on/off cycles.

Continuous Operation Issues

Diagnosing units that operate for extended periods.

High Supply Air Temperature

Diagnosing and resolving high supply air temperature.

Supply Air Temperature Issues

Troubleshooting general supply air temperature problems.

Liquid Line Problems

Diagnosing issues related to the unit's liquid line.

Suction Line Frosting

Troubleshooting suction line frosting and ice formation.

Blower Motor Not Running

Diagnosing and resolving blower motor failure.

Varispeed™™ Condenser Head Pressure Control

Fan Operation Issues

Troubleshooting VFD fan operation and control problems.

Fan Modulation and Speed Issues

Diagnosing fan modulation and speed control problems.

Electronic-Regulator

Control Valve Operation Problems

Diagnosing issues with automatic control valve operation.

Gas Flow and High Fire Issues

Troubleshooting gas flow and continuous high fire conditions.

Low/Medium Fire and Cycling Issues

Troubleshooting continuous low/medium fire and valve cycling.

Discharge Air Temperature Errors

Diagnosing incorrect discharge air temperature readings.

Erratic Flame Conditions

Troubleshooting pulsating or erratic flame issues.

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