York MILLENIUM SIMPLICITY ELITE Series - User Manual

351579-YTS-B-0608
ISO 9001
Certified Quality
Management System
MILLENNIUM
®
25-40 TON SINGLE PACKAGE
COMMERCIAL ROOFTOP UNIT EQUIPPED
WITH SIMPLICITY
®
CONTROLS
This manual includes application, programming and service
procedures for the Millennium
®
25-40 Ton Single Package
Commercial Rooftop Unit equipped with Simplicity
®
Controls.
These procedures are the same for all 25-40 Ton Millennium
®
Rooftop units in this series except as noted.
This manual covers Simplicity
®
controls only, for unit installation
information please refer to the following.
RECOMMENDED TECHNICAL AND
INSTALLATION AIDS
Millennium
®
25-40 Ton Single Package Installation and Operation
Manual - 336043
Millennium
®
25-40 Ton Technical Guide - 246653
TECHNICAL APPLICATION
AND
PROGRAMMING GUIDE
MILLENNIUM
®
SINGLE PACKAGE
ROOFTOP UNITS
25, 30 & 40 TON EQUIPPED WITH
SIMPLICITY
®
ELITE CONTROLS

York MILLENIUM SIMPLICITY ELITE Series Specifications

General

Brand	York
Model	MILLENIUM SIMPLICITY ELITE Series
Category	Air Conditioner
Language	English

Summary

THE MILLENNIUM SIMPLICITY CONTROL

INTRODUCTION AND OVERVIEW

Overview of the Simplicity control system for Millennium rooftop units.

COMPONENT DESCRIPTION

THE Simplicity CONTROLLER

Details on the Simplicity controller as a microprocessor-based HVAC controller.

INPUTS

ANALOG INPUTS (AI)

BINARY INPUTS (BI)

OUTPUTS

SIMPLICITY PROGRAMMING OPTIONS

PARAMETER SETTING

How to navigate and change parameter settings on the Simplicity control.

SETTABLE SYSTEM PARAMETERS

Cooling Mode Enable

Enables or disables the cooling operation mode.

Heating Mode Enable

Enables or disables the heating operation mode.

Run Test (Commissioning Test)

Command to perform a commissioning test of the unit.

MILLENNIUM SEQUENCE OF OPERATION

OVERVIEW

Explains the Simplicity control's comprehensive rule sets for unit operation.

RUN SEQUENCE

Electric Heat Option

Control logic for electric heat stages.

Economizer Option

How the control manages economizer operation.

HEAD PRESSURE CONTROL, R22 (R410 A)

SEQUENCE OF OPERATION - FOR HEAD PRESSURE CONTROL

Step-by-step operation of the head pressure control system.

COMFORT VENTILATION MODE

VAV OPERATION

VAV OPERATION WITH A THERMOSTAT

VAV OPERATION WITH A ZONE SENSOR

MORNING WARM UP; VAV OCCUPIED HEATING CONTROL ALGORITHM

CONTROLLING EXCESSIVE SAT (SUPPLY AIR TEMPERATURE)

SAT CONTROL FOR COOLING

SAT Control with Economizer

Control of compressors with Economizer

DEMAND VENTILATION

EXHAUST OPERATION

PROPORTIONAL CONTROL (FAN WITH MODULATING EXHAUST AIR DAMPER (EAD) CONTROLLED FROM BUILDING STATIC PRESSURE)

COMPRESSOR STATUS MONITORING

TROUBLESHOOTING A MILLENNIUM Simplicity CONTROL

STATUS LED CHART

FAILURE MODES AND DEFAULT OPERATION

SENSOR FAILURES AND DEFAULT OPERATION

SYSTEM ERRORS

HEATING SAT FAILURE

COOLING SAT FAILURE

SUPPLY FAN FAILURE

COMPRESSOR SAFETY CHAIN TRIP