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York Sun Premier GZA1M Series - User Manual

York Sun Premier GZA1M Series
122 pages
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25–50 Tons
YORK
®
Sun
Premier
Rooftop Units
R-410A
5587001-YSG-A-520
LD26877
Table of Contents
Nomenclature ...................................................................... 4
Pre Start-Up Checklist ......................................................... 7
Start-Up ............................................................................... 9
Long Term Storage ......................................................... 9
Checking System Prior to Initial Start (No Power) ......... 9
Unit Checks (Power Applied) ....................................... 10
Initial Start-Up .............................................................. 16
Refrigerant Charge ............................................... 16
Checking Sub-Cooling and Superheat.................. 16
Leak Checking ...................................................... 17
Gas Heat Models .................................................. 17
Phase Monitor Adjustment .................................... 20
Commissioning Mode................................................... 20
Air Balancing Wizard .................................................... 20
Start-Up Wizard ............................................................ 24
Start-Up Wizard Sequence ................................... 26
Sequences of Operation .................................................... 30
Control Boards ............................................................. 30
Variable Frequency Drives (VFDs) ............................... 37
Unit Type ...................................................................... 38
Occupancy Mode ......................................................... 38
Morning Warm-up/Cool Down ............................... 38
Coast..................................................................... 38
Remote Safety Shutdown ............................................ 39
Low Voltage Monitoring ................................................ 39
Supply Fan Operation .................................................. 39
Supply Fan Alarm.................................................. 39
MZVAV Supply Fan ............................................... 39
SZVAV Supply Fan ............................................... 40
Redundant Supply Fan VFD ................................. 40
Cooling Operation ........................................................ 40
MZVAV Cooling Operation .................................... 40
SZVAV Cooling Operation ..................................... 42
Compressors and Refrigeration Circuits ............... 42
Compressor Staging Sequences .......................... 44
Condenser Systems and Fans.............................. 48
Dehumidication (Hot Gas Reheat) ...................... 49
Economizer ........................................................... 51
Heating ......................................................................... 52
Gas Heating .......................................................... 52
Electric Heating ..................................................... 56
Hydronic Heating .................................................. 56
MZVAV Heating Operation .................................... 56
SZVAV Heating Operation .................................... 57
Ventilation..................................................................... 58
Ventilation Sequences .......................................... 58
Low Mixed Air Temperature Limiting ..................... 58
Demand Control Ventilation .................................. 58
Continuous Ventilation .......................................... 59
Pre-Occupancy Purge........................................... 59
Humidification............................................................... 60
Humidication Sequence ...................................... 60
Exhaust System ........................................................... 60
Modulating Exhaust Fan ....................................... 60
Modulating Exhaust Damper with Fan .................. 60
External Control .................................................... 60
Return Fan ................................................................... 60
Return Fan Discharge Pressure ........................... 61
Supply Fan Airow Tracking.................................. 61
Energy Recovery Wheel .............................................. 61
Single Speed Energy Recovery Wheel ................. 61
Variable Speed Energy Recovery Wheel .............. 61
Ultraviolet Lights........................................................... 61
Smoke Control ............................................................. 62
Purge .................................................................... 62
Pressurization ....................................................... 62
Depressurize ......................................................... 62
START-UP & OPERATION

Table of Contents

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York Sun Premier GZA1M Series Specifications

General IconGeneral
SeriesSun Premier GZA1M
RefrigerantR-410A
Dimensions (Indoor Unit)Varies by model
Weight (Indoor Unit)Varies by model
Dimensions (Outdoor Unit)Varies by model
Weight (Outdoor Unit)Varies by model
Cooling Capacity9, 000 - 36, 000 BTU/h
Power Supply208/230 V, 1 Phase, 60 Hz
Operating Temperature Range (Cooling)14°F to 122°F (-10°C to 50°C)
TypeDuctless Mini-Split
StagesSingle Stage

Summary

Nomenclature

Pre Start-Up Checklist

General Inspection

Verifies unit installation and basic components before operation.

Start-Up Procedures

Long Term Storage

Guidelines for storing units for extended periods before initial start-up.

Initial System Checks (No Power)

Pre-start checks of the system without power applied, focusing on physical and piping integrity.

Unit Checks (Power Applied)

Checks performed after applying power, including VFDs, rotation, and basic electrical tests.

Initial Unit Start-Up

Refrigerant Charge and System Checks

Verifying refrigerant charge, sub-cooling, and superheat for proper system operation.

Gas Heat Models Pre-Start Checks

Essential pre-start checks specific to gas heat sections, including leak detection.

Automated Start-Up Wizard

Start-Up Wizard Sequences and Tests

Details the various automated tests within the start-up wizard for system components.

Damper Checks

Verifies the operation and response of outside, return, and exhaust air dampers.

ERW and Supply Fan Tests

Checks the Energy Recovery Wheel and Supply Fan operation as part of the start-up sequence.

Cooling and Heating Tests

Performs automated checks on the cooling and heating system operations.

Unit Sequences of Operation

Control Board Overview

Identifies the main and optional control boards and their network communication.

Variable Frequency Drive (VFD) Configuration

VFD Panel Configurations

Describes the physical VFD cutout panels and their display options.

VFD Field Parameters

Lists configurable parameters for VFDs across various fan and compressor applications.

Supply Fan Operation and Control

Supply Fan Alarms and Monitoring

Explains supply fan alarms, air proving switches, and monitoring functions.

MZVAV Supply Fan Control

Details how the supply fan speed is controlled in MZVAV units based on duct static pressure.

SZVAV Supply Fan Control

Explains SZVAV supply fan speed control based on unit modes and cooling/heating demands.

Cooling System Operation

MZVAV Cooling Operation

Describes cooling operation for MZVAV units, including sensor inputs and modes.

Discharge Air Temperature Reset

Explains methods for resetting the Discharge Air Temperature setpoint based on various conditions.

Compressors and Refrigeration Circuits

Compressor Configuration and Types

Details compressor numbering, layout, and types (single speed vs. variable speed).

Compressor Staging Sequences

Explains algorithms for sequencing compressors to meet cooling demand effectively.

Compressor and Refrigeration Circuit Safeties

Covers safety chains, low pressure cutouts, and lockout procedures for compressor protection.

Condenser Systems and Fan Control

Saturated Liquid Line Temperature Control

Describes how condenser fans are controlled based on saturated liquid line temperature staging.

Fail Safe Mode

Explains the fail-safe operation of condenser fans when sensor values become invalid.

Low Ambient Operation

Details the operation of condenser fans under low ambient outdoor air temperature conditions.

Dehumidification System (Hot Gas Reheat)

Dehumidification Sequence Logic

Describes how the unit controls humidity levels using the HGRH system in different modes.

Economizer Operation

Economizer Changeover Methods

Explains different methods used by the unit to determine economizer suitability based on air conditions.

Heating System Operation

Gas Heating Sequences

Details the operation of staged and modulating gas heating systems, including fault lists.

Electric Heating Stages and Control

Explains staged and modulating electric heating operation, including SCR control and LED indicators.

Hydronic Heating and Freezestat Alarm

Covers hot water/steam coil installation, operation, and the freezestat safety function.

MZVAV Heating Operation

Describes heating operation for MZVAV units, including sensor inputs and setpoints.

Ventilation System Operation

Ventilation Sequences and Control

Explains different ventilation sequence options like fixed minimum, supply fan speed, and airflow measurement.

Demand Control Ventilation (DCV)

Details how CO2 sensors control the outside air damper for demand-controlled ventilation.

Smoke Control Sequences

Smoke Control Scenarios (Purge, Pressurization, Depressurize)

Describes the three operating scenarios for smoke control: Purge, Pressurization, and Depressurize.

User Interface Display Overview

Provides an overview of the unit's user interface display, including screen layout and navigation.

User Interface Menu Navigation

Status and Summary Menus

Describes the Status, Alarms, Alarm Log, and Summary menus for viewing unit states.

Commissioning and Controller Menus

Covers the Commission and Controller menus for system setup and configuration.

Update, Details, Schedule, and Start-Up Wizard Menus

Explains the Update, Details, Schedule, and Start-Up Wizard menus for firmware management and initial setup.

Unit Power On and Initialization

USB Port for Firmware Updates

Explains how to use the USB port for saving settings and updating unit controller firmware.

Firmware Update Procedures

Outlines the steps for updating display and main control board firmware using USB drives.

Auto Firmware Update Process

Describes the automatic firmware update process for control boards and troubleshooting mismatches.

Backup and Restore Functions

Details how to back up and restore unit configuration parameters using the USB port.

Unit Communication Capabilities

BACnet Integration Setup and Certification

Covers BACnet IP and MS/TP integration, including BTL certification and setup.

Communication Component Connections

Explains the physical connections for FC Bus, SA Bus, Modbus, EQ Bus, and BACnet IP terminals.

BACnet IP and MS;TP Settings

Provides recommended settings for BACnet IP and MS/TP configurations.

Mobile Access Portal (MAP) Gateway

Describes the MAP gateway for wireless mobile access to Smart Equipment devices.

Verasys System Integration

Details the Verasys system for optimized control and optimization of commercial buildings.

System Faults and Troubleshooting

Critical Faults Identification

Lists critical faults related to safety chain trips, pressure issues, and communication failures.

Service Priority Faults and Causes

Details service priority faults related to component shutdowns, sensor failures, and operational issues.

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