York DC-120 User Manual

R-407C NO CHARGE
DC SERIES
7-1/2 - 12-1/2 Ton
50 Hertz
5120410-XIM-B-0216
TABLE OF CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Preceding Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 18
Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Optional Gas Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Optional Hot Gas Bypass (HGBP) . . . . . . . . . . . . . . . . . . 27
Economizer Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Dry Bulb Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Single Enthalpy Changeover. . . . . . . . . . . . . . . . . . . . . . . 27
Dual Enthalpy Changeover . . . . . . . . . . . . . . . . . . . . . . . . 27
Auto. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Free Cooling Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Power Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Checking Air Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Sequence Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 48
No Outdoor Air Options . . . . . . . . . . . . . . . . . . . . . . . . . 48
Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . 49
Electric Heating Sequence Of Operations . . . . . . . . . . . . 50
Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . 50
Gas Heating Sequence Of Operations . . . . . . . . . . . . . . . 51
Ignition Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Gas Heating Operation Errors . . . . . . . . . . . . . . . . . . . . 51
Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Start-Up (Gas Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Checking Gas Heat Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Charging The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Simplicity™ SE (Smart Equipment) Firmware Version 3.
Basic Unit Control Board Navigation Examples: . . . . . . . . 57
Start-Up Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
A

York DC-120 Specifications

General

Brand	York
Model	DC-120
Category	Air Conditioner
Language	English

Summary

General Unit Information

Safety Considerations

Alert symbols and signal words (DANGER, WARNING, CAUTION) indicating potential hazards.

Model Nomenclature Breakdown

Installation Procedures

Installation Safety Information

Essential safety precautions and warnings before commencing unit installation.

Application Limitations and Component Location

Simplicity SE Control Board Features

Description of the Simplicity SE control board and its capabilities for cooling applications.

Location and Clearances

Unit Location Guidelines

Recommendations for selecting a suitable installation location based on codes and site requirements.

Unit Weights and Dimensions

Ductwork and Roof Curb Information

Ductwork Design Guidelines

Recommendations for designing and sizing ductwork according to industry standards.

Power and Control Wiring

Wiring Compliance and Safety

Instructions for field wiring, grounding, and safety compliance with electrical codes.

Thermostat Wiring and Control Wire Sizes

Thermostat Installation Guidelines

Recommendations for thermostat location and wiring procedures.

Electrical Data Tables

Physical Data Tables

Gas Pipe Sizing and Gas Connection

Gas Pipe Sizing Capacity Tables

Tables indicating pipe capacity based on length and nominal iron pipe size.

Gas Connection Procedures and Recommendations

Steps for connecting gas supply, including safety warnings and recommendations.

Economizer and Related Systems

Economizer Free Cooling Types

Overview of available free cooling options: Dry Bulb, Single Enthalpy, Dual Enthalpy.

Free Cooling and Power Exhaust Operation

Free Cooling Operation Details

Step-by-step explanation of free cooling operation based on thermostat and sensor inputs.

Simplicity SE Economizer Controller Details

Simplicity SE Economizer Controller Details (Continued)

Simplicity SE Unit Control Board (UCB) Details

Airflow Performance Corrections

Altitude and Temperature Corrections for Airflow

Information on adjusting airflow performance data for altitude and temperature variations.

Airflow Performance - Side Duct Application Tables

Airflow Performance - Side Duct Application Tables (Continued)

Airflow Performance - Bottom Duct Application Tables

Airflow Performance - Bottom Duct Application Tables (Continued)

Blower Specifications and Airflow Measurement

Indoor Blower and Power Exhaust Specifications

Tables detailing specifications for indoor blowers and power exhaust motors.

Air Balance and Checking Air Quantity

Procedures for balancing airflow and measuring air quantity using two methods.

Airflow Measurement and Blower Adjustment

Airflow Measurement Steps and Dry Coil Delta P

Steps for measuring airflow and using Dry Coil Delta P graphs for calculations.

Supply Air Drive Adjustment

Blower Speed Adjustment Procedure

Instructions for adjusting blower speed using the variable pitch motor sheave.

Additional Static Resistance Tables

Additional Static Resistance Tables (Continued)

Sequence of Operation - Cooling

Cooling Sequence Overview

Detailed explanation of the cooling sequence, including compressor and fan operation.

Sequence of Operation - Cooling (Continued)

Economizer Operation Modes

Description of economizer operation with dual enthalpy sensors, power exhaust, and motorized dampers.

Cooling Operation Errors and Safety Switches

Explanation of cooling system errors, limit switches, and low ambient operation.

Sequence of Operation - Heating

Electric Heating Sequence

Description of the operation sequence for electric heating stages and error handling.

Compressor Protection Features

Details on compressor protection mechanisms like Anti-Short Cycle Delay and minimum run times.

Sequence of Operation - Gas Heating

Gas Heating Sequence of Operations

Step-by-step description of gas heating ignition, flame stabilization, and operation.

Gas Heating Operation Errors

Information on gas heating faults, lock-outs, temperature limits, and flame sensing.

Gas Heating Safety Controls and Settings

Gas Heat Safety Controls

Description of limit switches, pressure switches, and microprocessor failure detection for gas heat.

Start-Up Procedures

Cooling Start-Up Checklist

Pre-start checks, operating instructions, and post-start checks for cooling mode.

Gas Heat Start-Up Checklist

Pre-start checks, operating instructions, and post-start checks for gas heating mode.

Checking Gas Heat Input

Procedure for verifying gas heat input rate for the furnace.

Checking Gas Heat Input (Continued)

Manifold Gas Pressure Adjustment

Procedure for adjusting manifold gas pressure for heating stages.

Gas Heat Adjustment and Servicing

Manifold Gas Pressure Adjustment (Continued)

Step-by-step guide to adjusting gas valve pressure for first and second stages.

Charging the Unit and Ignition Codes

Unit Charging Procedure

Instructions for charging the unit using Thermal Expansion Devices.

Ignition Control Flash Codes

Table listing ignition control flash codes and their corresponding fault conditions.

Simplicity SE Control Board Navigation Examples

Simplicity SE Control Board Navigation (Commissioning)

Simplicity SE UCB Details (Continued)

Start-Up and Service Data Instruction

Start-Up Checklist Overview

Covers essential start-up checkpoints common to all package equipment.

Safety Warnings and Design Information

General Safety Warnings for Startup

Critical safety warnings regarding lethal voltages and moving parts during startup.

Design Application Information

Required system information from the specifying engineer for proper equipment startup.

Operating Measurements - Air Flow

Air Flow Measurement Procedures

Steps for measuring fan rotation, airflow, and electrical data.

Electrical Data Recording

Table for recording nameplate and measured electrical data for unit components.

Operating Measurements and Refrigerant Safeties

Cooling Operating Measurements

Data points to record for cooling system operation, including pressures and temperatures.

Refrigerant Safety Checks

Procedures for verifying compressor rotation and safety switch operations.

Gas Heating Operating Measurements

Data points to record for gas heating operation, including manifold pressure and temperature rise.

Operational Measurements and Final Inspection

Staging Controls Verification

Checks for proper operation of heating/cooling staging and variable frequency drives.

Final Inspection and Observations

Final verification of set points, options, panel security, and recording of deficiencies.