Simplicity 953 Installation Manual

351579-YTS-C-0111ISO 9001Certified QualityManagement SystemMILLENNIUM® 25-40 TON SINGLE PACKAGE COMMERCIAL ROOFTOP UNIT EQUIPPED WITH SIMPLICITY® CONT

351579-YTS-C-011110 Johnson Controls Unitary ProductsDemand Ventilation Input0 - 10 VDC 0 - 2000 PPMof CO21 PPM2 0 P P M 1%

351579-YTS-C-0111Johnson Controls Unitary Products 11SIMPLICITY® PROGRAMMING OPTIONSThe paragraphs below provide a definition of, and specify the func

351579-YTS-C-011112 Johnson Controls Unitary ProductsPower Exhaust - (ON) - This tells the control if it has the Power Exhaust option installed.Econom

351579-YTS-C-0111Johnson Controls Unitary Products 13be turned off by turning off the RAH Sensor Enable option. Thus, the option setting is used to re

351579-YTS-C-011114 Johnson Controls Unitary ProductsHeating Lockout on OAT - (75 °F) - This is the Outside Air Temperature Setpoint that the control

351579-YTS-C-0111Johnson Controls Unitary Products 15Once the Unoccupied Override mode is initiated, it will continue until the programmed Unoccupied

351579-YTS-C-011116 Johnson Controls Unitary ProductsTable 5: Settable System ParametersAddress Function Unit Range Default Your Settings1 Run test ON

351579-YTS-C-0111Johnson Controls Unitary Products 17NOTES:For On/Off functions, 1 is ON and 0 is OFFRead only items are readings from sensors which o

351579-YTS-C-011118 Johnson Controls Unitary ProductsMILLENNIUM® SEQUENCE OF OPERATIONOVERVIEWThe Millennium® Simplicity® control has comprehensive ru

351579-YTS-C-0111Johnson Controls Unitary Products 192. Mechanical cooling stages have two monitoring circuits: low pressure and high pressure. They a

351579-YTS-C-01112 Johnson Controls Unitary ProductsTABLE OF CONTENTSMILLENNIUM® 25-40 TON SINGLE PACKAGE COMMERCIAL ROOFTOP UNIT EQUIPPED WITH SIMPLI

351579-YTS-C-011120 Johnson Controls Unitary Products9. Modulating Gas Heat Option: The modulating gas heat option uses a slave control, “MFC” Modulat

351579-YTS-C-0111Johnson Controls Unitary Products 21determined by the status of the internal clock and the internal schedules.OCCUPIED / UNOCCUPIED /

351579-YTS-C-011122 Johnson Controls Unitary Products(optional) are disabled, so cooling is disabled and the optional economizer outside air dampers a

351579-YTS-C-0111Johnson Controls Unitary Products 23Pressure Switch - The pressure switch closes on a drop below a specific pressure. On a call for h

351579-YTS-C-011124 Johnson Controls Unitary ProductsTable 8: Modulating Gas HeatStages of Gas Control (% of Full Heat Output) Gas Valve Signal for Hi

351579-YTS-C-0111Johnson Controls Unitary Products 2514. Electric Heat Option: A call for heat stages electric heat on. Electric heat is available as

351579-YTS-C-011126 Johnson Controls Unitary ProductsSingle Enthalpy: the control will consider, along with outside temperature, outside air humidity

351579-YTS-C-0111Johnson Controls Unitary Products 27As the ambient temperature dips below 40 °F the 1 condenser fan will slow to the minimum speed. T

351579-YTS-C-011128 Johnson Controls Unitary ProductsFAN DELAYSThere are separate Fan ON and OFF delay periods for heating and cooling, to reduce the

351579-YTS-C-0111Johnson Controls Unitary Products 29mizer damper and using more outdoor air. However, if the economizer algorithm can not prevent the

351579-YTS-C-0111Johnson Controls Unitary Products 3THE MILLENNIUM® SIMPLICITY® CONTROLINTRODUCTION AND OVERVIEWWelcome to the new Millennium® Simplic

351579-YTS-C-011130 Johnson Controls Unitary Productsmodes are controlled by an internal time clock. If a thermostat is connected in addition to the s

351579-YTS-C-0111Johnson Controls Unitary Products 31TYPES OF SPACE SENSORSNo Sensor- The system will internally detect the presence of space sensors.

351579-YTS-C-011132 Johnson Controls Unitary Productsfirst stage until the Space temperature reaches the Setpoint and then it will turn off the entire

351579-YTS-C-0111Johnson Controls Unitary Products 33UNOCCUPIED HEATING WITH A THERMOSTATThis operation is identical to the Occupied heating, except t

351579-YTS-C-011134 Johnson Controls Unitary Productsfree cooling is available (economizer operation) and the other one for mechanical cooling only. F

351579-YTS-C-0111Johnson Controls Unitary Products 35Full heating (all stages) is ON when RAT drops 2 °F below the setpoint, heating is OFF when RAT i

351579-YTS-C-011136 Johnson Controls Unitary ProductsSAT CONTROL FOR COOLINGThis control has priority over any other zone temperature or SAT control a

351579-YTS-C-0111Johnson Controls Unitary Products 37The RAH sensor, if available in addition to the OAH sensor, allows use of Differential Enthalpy m

351579-YTS-C-011138 Johnson Controls Unitary ProductsTurning on compressors #2 through #4:If the economizer controller is saturated High (i.e. the eco

351579-YTS-C-0111Johnson Controls Unitary Products 39for economizer loading arises in Communicating Zoning System applications (“VVT” systems) using s

351579-YTS-C-01114 Johnson Controls Unitary Productsalarms, it will overwrite the oldest alarm after the history buffer becomes full.Some system error

351579-YTS-C-011140 Johnson Controls Unitary Productsprogrammed Maximum Economizer Position for Demand Ventilation. The algorithm is deactivated, and

351579-YTS-C-0111Johnson Controls Unitary Products 41time 60 seconds (Non-adjustable). With this type of control, the Power Exhaust fan cycle, as its

351579-YTS-C-011142 Johnson Controls Unitary ProductsTable 13: Alarm Default CodesCode Cause1 Compressor number one locked out on High Pressure Contro

351579-YTS-C-0111Johnson Controls Unitary Products 43TROUBLESHOOTING A MILLENNIUM® Simplicity® CONTROLSTATUS LED CHARTThe Status LED mounted on the co

Subject to change without notice. Printed in U.S.A. 351579-YTS-C-0111Copyright © 2011 by Johnson Controls, Inc. All rights reserved. Supersedes: 3515

351579-YTS-C-0111Johnson Controls Unitary Products 5EPROM - This is “nonvolatile” memory, meaning it will not be erased on a power loss. This memory i

351579-YTS-C-01116 Johnson Controls Unitary Productsmonitoring and control. Much like we need a unique street address in our homes so we can receive o

351579-YTS-C-0111Johnson Controls Unitary Products 7ANALOG INPUTS (AI)Analog inputs require parameters that define the input’s characteristics. Attrib

351579-YTS-C-01118 Johnson Controls Unitary Productsthermostat. If a thermostat is installed on the system, these inputs are connected to the thermost

351579-YTS-C-0111Johnson Controls Unitary Products 9Table 3: Simplicity® Control InputsName Range Resolution Precision DescriptionY1 18 - 30 VAC On -