Table of Contents
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TECHNICAL APPLICATION
PROGRAMMING GUIDE
®
MILLENNIUM
SINGLE PACKAGE
ROOFTOP UNITS
25, 30 & 40 TON EQUIPPED WITH
®
ELITE CONTROLS
SIMPLICITY
AND
®
MILLENNIUM
25-40 TON SINGLE PACKAGE
COMMERCIAL ROOFTOP UNIT EQUIPPED
®
WITH SIMPLICITY
This manual includes application, programming and service
procedures for the Millennium
Commercial Rooftop Unit equipped with Simplicity
These procedures are the same for all 25-40 Ton Millennium
Rooftop units in this series except as noted.
This manual covers Simplicity
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
351579-YTS-B-0608
CONTROLS
®
25-40 Ton Single Package
®
Controls.
®
controls only, for unit installation
ISO 9001
Certified Quality
Management System
®
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Table of Contents
Related Manuals for York MILLENIUM SIMPLICITY ELITE Series
Summary of Contents for York MILLENIUM SIMPLICITY ELITE Series
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Page 1: Millennium® 25-40 Ton Single Package Commercial Rooftop Unit Equipped With Simplicity® Controls
351579-YTS-B-0608 ® TECHNICAL APPLICATION MILLENNIUM 25-40 TON SINGLE PACKAGE COMMERCIAL ROOFTOP UNIT EQUIPPED ® WITH SIMPLICITY CONTROLS PROGRAMMING GUIDE This manual includes application, programming and service ® procedures for the Millennium 25-40 Ton Single Package ® Commercial Rooftop Unit equipped with Simplicity Controls. -
Page 2: Table Of Contents
351579-YTS-B-0608 TABLE OF CONTENTS MILLENNIUM® 25-40 TON SINGLE PACKAGE CONTROLLING EXCESSIVE SAT (SUPPLY AIR TEMPERATURE) ......35 COMMERCIAL ROOFTOP UNIT EQUIPPED WITH SIMPLICITY®... -
Page 3: The Millennium® Simplicity® Control
351579-YTS-B-0608 ® ® ® ® THE MILLENNIUM CONTROL The Millennium control is resistor-configured for SIMPLICITY Simplicity Constant Volume (CV) units or Variable Air Volume (VAV) units. The option settings for a specific option configuration will be INTRODUCTION AND OVERVIEW made as part of unit test at the factory; however, if there is ®... -
Page 4: Digital Lingo
351579-YTS-B-0608 alarms, it will overwrite the oldest alarm after the history buffer depending on how long the sensed value remains away from its becomes full. desired setpoint. Some system errors will initiate a controlling response as well Fortunately, you do not have to determine all of these as being stored in the error memory buffer. -
Page 5: Communications Bus
RTU protocol. The ModLINC is EEPROM (Double “E” Prom) - Is also non-volatile, but this preconfigured to provide an interface to YORK UPG products type of memory requires a special process to be written to. This equipped with an Intelli-Comfort or Simplicity Elite™ controller memory can be written to and changed by the microprocessor. -
Page 6: Acronyms
351579-YTS-B-0608 monitoring and control. Much like we need a unique street Table 1: Acronyms (Continued) address in our homes so we can receive our postal mail or Pushbuttons Description emergency services, these units also need a unique address so Test/Reset / 'Up 'Test / control reset / Data value increment the central Facilities Management System (FMS) can “talk”... - Page 7 351579-YTS-B-0608 ANALOG INPUTS (AI) voltage and drop the contactors and shut down if the voltage drops below 16 VAC and flash the appropriate flash code. Analog inputs require parameters that define the input’s characteristics. Attributes of an AI include the linear range, REMOTE - the control will use 0-10 VDC from third-party alarm limits, alarm differential, change of state (COS) enable, BAS to control SAT setpoints.
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Page 8: Vfd Control Wiring
351579-YTS-B-0608 thermostat. If a thermostat is installed on the system, these position of the guide vane. If the unit has a factory-installed inputs are connected to the thermostat interface board just as Variable Frequency Drive, the 2 to 10 VDC signal is wired from are the cooling/heating calls. -
Page 9: Simplicity® Control Inputs
351579-YTS-B-0608 ® Table 3: Simplicity Control Inputs Name Range Resolution Precision Description 18 - 30 VAC On - Off +/- .5 VAC Request for the first stage of Cooling (24 VAC sense) Tstat Screw Terminal 18 - 30 VAC On - Off +/- .5 VAC Request for the second stage of Cooling (24 VAC sense) Tstat Screw Terminal 18 - 30 VAC... -
Page 10: Simplicity® Control Outputs
351579-YTS-B-0608 ® Table 3: Simplicity Control Inputs (Continued) Name Range Resolution Precision Description 0 - 10 VDC Demand Ventilation 20 PPM 0 - 2000 PPM 1 PPM 0 - 10 volt input Input 1% Across Range of CO2 Remote Control 0 - 10 VDC .05 VDC 0.01... -
Page 11: Simplicity® Programming Options
351579-YTS-B-0608 ® PROGRAMMING OPTIONS setpoints that are specific to your customer’s needs (i.e. SIMPLICITY building pressure) or enabling some extended options that are The paragraphs below provide a definition of, and specify the integrated into the Simplicity control. Also, if there are field function related to, each of the parameters that are field- changes, i.e. - Page 12 351579-YTS-B-0608 Power Exhaust - (ON) - This tells the control if it has the Power Economizer Second Stage Setpoint - (50 °F) - This tells the Exhaust option installed. control what Supply Air Temperature to maintain for a call for second stage of cooling.
- Page 13 351579-YTS-B-0608 be turned off by turning off the RAH Sensor Enable option. VAV Low Temperature SAT Setpoint for Cooling - (55 °F) - Thus, the option setting is used to reflect the desired operation The control will maintain this SAT when operating in VAV mode and mainly to control sensor failure alarms.
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Page 14: Sequence Of Setting The Set Points
351579-YTS-B-0608 Heating Lockout on OAT - (75 °F) - This is the Outside Air always be placed on units that use hydronic heating. When the Temperature Setpoint that the control will use to lock out Heating control senses 24VAC, the control will turn on the Hot Water when the OAT is above this setpoint. - Page 15 351579-YTS-B-0608 Once the Unoccupied Override mode is initiated, it will continue IAQ Sensor Range - (5,000 ppm) - This tells the control what until the programmed Unoccupied Override Time Limit is the full range is for a specific IAQ sensor. It can be changed reached.
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Page 16: Settable System Parameters
351579-YTS-B-0608 Table 5: Settable System Parameters Address Function Unit Range Default Your Settings Run test ON-OFF Fan on delay-Heating 0-30 Fan off delay-Heating 0-255 Fan on delay-Cooling 0-30 Fan off delay-Cooling 0-255 Factory setting Do not change Suspend Cont Fan when starting Heating ON-OFF Construction Mode ON-OFF... - Page 17 351579-YTS-B-0608 Table 5: Settable System Parameters (Continued) Address Function Unit Range Default Your Settings Exhaust Damper Position for Exhaust Fan to % Of Damper Position 0-100 Turn Off (Modulating Only) Economizer Damper Position for Exhaust Fan % Of Damper Position 0-100 to Turn On (Non-Modulating Only) Economizer Damper Position for Exhaust Fan...
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Page 18: Millennium® Sequence Of Operation
351579-YTS-B-0608 ® MILLENNIUM SEQUENCE OF OPERATION day of the week, and twenty holidays. In addition to the programmed schedule, the space sensor allows a single key press to provide up to a 4-hour unoccupied override into the OVERVIEW occupied mode. ®... -
Page 19: Cooling Stage
351579-YTS-B-0608 Mechanical cooling stages have two monitoring circuits: denser fan 1). On 25 ton units, condenser fan 2 (contactor low pressure and high pressure. They are connected to the 7M) is brought on by PS5 if discharge pressure on com- control through the LPSx and HPSx terminals. -
Page 20: Variable Air Volume Unit (Vfd & Igv)
351579-YTS-B-0608 Modulating Gas Heat Option: The modulating gas heat Dry Bulb: The control relies on the RAT, OAT, and SAT option uses a slave control, “MFC” Modulating Furnace readings, connected to those terminals on the control. Control, that receives the heat calls from the UCB and then Free cooling will be available until the outdoor tempera- controls up to 17 Steps of gas heat in a similar manner. -
Page 21: Occupied / Unoccupied / Morning Warm-Up
351579-YTS-B-0608 determined by the status of the internal clock and the internal MORNING WARM-UP [MWUP] schedules. The unit enters a morning warm-up mode going in to the first OCCUPIED / UNOCCUPIED / MORNING WARM-UP Occupied period of the control’s internal daily schedule. In this mode, the supply fan is operated at full volume, optional unit OCCUPIED heating is engaged at full capacity if needed, the optional power... - Page 22 351579-YTS-B-0608 (optional) are disabled, so cooling is disabled and the energized, duct pressure control is activated. The optional optional economizer outside air dampers are closed. power exhaust system is activated. When the return air temperature climbs above the MWUP In heat mode, cooling is disabled and the optional econo- setpoint, heating is disabled, VAV and the economizer are mizer outside air dampers are closed.
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Page 23: Ignition Control Board Flash Codes
351579-YTS-B-0608 Pressure Switch - The pressure switch closes on a 12. Gas Heat Two-Stage Module: The arrangement and oper- drop below a specific pressure. On a call for heat, the ation for two stage modules is similar to the single stage ICB checks the pressure switch for open state before it modules except that the gas valve and the ignition control energizes the draft motor. -
Page 24: Modulating Gas Heat
351579-YTS-B-0608 Table 8: Modulating Gas Heat Stages of Gas Control (% of Full Heat Output) Gas Valve Signal for High and Low Fire Gas Heat % of Total Step Input Output Module Output 69,333 55,466 106,666 85,333 165,332 132,266 202,665 162,132 229,332 183,466... -
Page 25: Modulating Gas Heat Control Board Flash Codes
351579-YTS-B-0608 limit. In addition to the primary limit, back-up limits may trip Table 9: Modulating Gas Heat Control Board Flash Codes under these conditions. The back-up limits are one-trip devices and will have to be replaced should they trip. Flash Code Description Heart Beat Normal Operation... -
Page 26: Head Pressure Control
351579-YTS-B-0608 Single Enthalpy: the control will consider, along with NOTE: For smoke purge, etc., special connections: for stan- outside temperature, outside air humidity [OAH sensor; dard controls, consult a controls specialist familiar with parameter must be set to ON] in enabling free cooling. your local codes. -
Page 27: Intelli-Start
351579-YTS-B-0608 As the ambient temperature dips below 40 °F the 1 condenser fan associated with manufacturing and servicing equipment with will slow to the minimum speed. The circuit 2 condenser fan will this level of interacting features - but you can’t see the status of disengage when the discharge pressure drops below 180 psi R22 interlocked rules as you can with discreet relays. -
Page 28: Comfort Ventilation Mode
351579-YTS-B-0608 FAN DELAYS specified Comfort Ventilation Upper Setpoint and Comfort Ventilation Lower Setpoint). This may require some additional There are separate Fan ON and OFF delay periods for heating energy, but improves space comfort (e.g. instead of bringing a and cooling, to reduce the momentary change in SAT. very hot and humid ventilation / outdoor air into space during the “satisfied”... -
Page 29: Hydronic Heat
351579-YTS-B-0608 mizer damper and using more outdoor air. However, if the performs calculations necessary to set its output, that controls economizer algorithm can not prevent the SAT from the hot water valve, to have the same value on starting the ON- increasing above the top control band limit by closing the cycle as it had when it went into the OFF-cycle (in spite of some economizer damper to its programmed minimum position,... -
Page 30: Thermostat Operation For Cooling With Y1, Y2, Y3 And Y4 Inputs
351579-YTS-B-0608 modes are controlled by an internal time clock. If a thermostat is overrun time, or only the supply fan continues to operate (in case connected in addition to the space sensor, it takes priority over G=ON). The operation of the thermostat's G signal is determined the space sensor. -
Page 31: Types Of Space Sensors
351579-YTS-B-0608 TYPES OF SPACE SENSORS A zone heating demand of -1.5 °F will generate a request for first stage heat. No Sensor- The system will internally detect the presence of A zone heating demand of -2.0 °F will generate a request for space sensors. -
Page 32: Vav Operation
351579-YTS-B-0608 first stage until the Space temperature reaches the Setpoint and occupied heating based on comparison of zone temperature to then it will turn off the entire stage one compressor. a programmed "VAV SAT Reset Setpoint". However, since the zone is controlled by its own zone thermostat to a temperature If the unit starts with a demand greater than 2.0 °F, the control will setpoint set independently of the VAV SAT Reset Setpoint, the stage up first stage and wait 5 minutes. - Page 33 351579-YTS-B-0608 UNOCCUPIED HEATING WITH A THERMOSTAT regardless of setting of the programmable parameter "Heat Stages"). This operation is identical to the Occupied heating, except the unit mode is in Unoccupied mode from the internal control The supply fan is controlled to 100% during unoccupied heating Occupied/Unoccupied table.
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Page 34: Supply Duct Pressure Control Algorithm
351579-YTS-B-0608 free cooling is available (economizer operation) and the other Unoccupied mode for the first hour after the occupied Override one for mechanical cooling only. First, when free cooling is input is turned on. Reference the Weekly and Holiday Schedule, available ("economizer suitable"), the SAT control algorithm is Tables 11 and 12. -
Page 35: Controlling Excessive Sat (Supply Air Temperature)
351579-YTS-B-0608 Occupied Heating control algorithm controls RAT between the Table 12: Holiday Schedule MWU RAT Setpoint and two degrees below the setpoint and cycles the fan the same way as the MWU algorithm. Start Day Number Holiday Number Start Month Start Time of Month of Days... -
Page 36: Sat Setpoints Used During Cooling With Economizer Operation
351579-YTS-B-0608 SAT CONTROL FOR COOLING Unoccupied mode, in case the temperature control to an unoccupied setpoint can use Outside Air for free cooling). This control has priority over any other zone temperature or SAT control and is used at all times, during CV as well as VAV MINIMUM POSITION DURING HEATING AND OCCUPIED operation. - Page 37 351579-YTS-B-0608 The RAH sensor, if available in addition to the OAH sensor, SAT Control with Economizer allows use of Differential Enthalpy method for deciding on free If the economizer is “suitable” (free cooling is available) and cooling availability. cooling is required (the unit is not in satisfied state), the See paragraphs OAH Sensor Enable and RAH Sensor Enable algorithm will be active and modulate economizer position in in Settable Parameters, Table 5 in this document.
- Page 38 351579-YTS-B-0608 Turning on compressors #2 through #4: Economizer Loading Option If the economizer controller is saturated High (i.e. the This is a programmable option. The user has the ability to turn economizer is 100% open while one or more compressors are this function off.
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Page 39: Demand Ventilation
351579-YTS-B-0608 for economizer loading arises in Communicating Zoning setpoint (the setpoint is programmable between 100 °F - System applications (“VVT” systems) using supply air bypass 195 °F, default is 160 °F). when heating load in the zones is low and a large amount of hot supply air is bypassed back into return and mixed air In units that use hydronic heat, the Economizer Loading function temperature is very high. -
Page 40: Exhaust Operation
351579-YTS-B-0608 programmed Maximum Economizer Position for Demand to turn ON at Economizer 60% open, turn OFF at Economizer Ventilation. The algorithm is deactivated, and the previous, 20% open. The EF has a minimum run time of 10 seconds and normal mode of economizer position control resumed when the a minimum off time of 60 seconds. -
Page 41: Scheduling Operation
351579-YTS-B-0608 time 60 seconds (Non-adjustable). With this type of control, the does not need to rotate; the wheel will cycle on schedule to Power Exhaust fan cycle, as its operation directly influences the keep the air passages blown clean. building static pressure that controls it. The cycling rate is Also refer to the ERV Installation Instructions packaged with the limited by these minimum ON and OFF time settings. -
Page 42: Alarm Default Codes
351579-YTS-B-0608 Table 13: Alarm Default Codes Code Cause Compressor number one locked out on High Pressure Control Compressor number two locked out on High Pressure Control Compressor number three locked out on High Pressure Control Compressor number four locked out on High Pressure Control Compressor number one locked out on Low Pressure Control Compressor number two locked out on Low Pressure Control Compressor number three locked out on Low Pressure Control... -
Page 43: Troubleshooting A Millennium
351579-YTS-B-0608 ® TROUBLESHOOTING A MILLENNIUM SENSOR FAILURES AND DEFAULT OPERATION ® CONTROL Simplicity A failure of SAT RAT, OAT, IAQ, Space Temperature, or an outside or return air Relative Humidity sensor will generate a common STATUS LED CHART error. A failure of the Duct Static or Building Pressure sensor will generate another common error. -
Page 44: System Errors
Subject to change without notice. Printed in U.S.A. 351579-YTS-B-0608 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: 351579-YTS-A-0208 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...
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