Table of Contents
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Table of Contents
Related Manuals for Johnson Controls 105
Summarization of Contents
GENERAL SAFETY GUIDELINES
SAFETY SYMBOLS
Alerts readers to specific hazardous situations and important information.
CHANGEABILITY OF THIS DOCUMENT
CHANGE BARS
Indicates revisions made to the document with a line in the column.
NOMENCLATURE
BASE MODEL NUMBER
Defines the structure and meaning of the unit's base model number.
SECTION 1 – INTRODUCTION
Ecological and Economical Design
Discusses unit optimization for refrigerant and energy efficiency standards.
Cooling and Heating
Details superior operating performance and capacity control for comfort.
Indoor Air Quality (IAQ)
Explains how economizers and fresh air introduction improve building environment.
Premium-Efficiency Motors
Highlights availability of premium-efficiency motors for optimal energy efficiency.
Condensing Section
Covers components related to the unit's condensing capabilities.
Heating Section
Details components and features of the unit's heating capabilities.
Air Management
Discusses fans, building pressure control, and low sound options.
SECTION 2 – INSTALLATION
Approvals
Lists certifications and approvals for unit installation and use.
Limitations
Specifies installation requirements and conformity to codes.
Unit Inspection
Instructions for inspecting the unit for shipping or installation damage.
Locations And Clearances
Guidelines for selecting unit site, considering structural, acoustical, and service needs.
Rigging and Handling
Mandatory procedures for unloading and setting the unit to maintain warranty.
Unit Weights
Lists unit weights for rigging and roof load calculations.
Unit Placement
Guidance on elevated and ground-level unit placement.
Roof Curb Installation
Information on optional factory-designed roof curbs for YPAL units.
Electrical Data
Information regarding electrical service sizing and load definitions.
Filters
Describes standard and optional filter types and their importance.
Condensate Drain
Details condensate drain piping and trap requirements.
Air Hoods For Economizer
Instructions for installing economizer outside air intake hoods.
Field Wiring
Refers to wiring diagrams for Simplicity control board field wiring.
Thermostat
Explains thermostat connection and control methods for CV/VAV units.
Smoke Purge Input
Explains the function of the smoke purge input for evacuation.
SECTION 3 – START-UP
Crankcase Heaters
Explains the function of crankcase heaters to prevent refrigerant migration.
Checking The System Prior To Initial Start (No Power)
Pre-start checks including unit inspection and refrigerant piping leak checks.
Initial Start‑Up
Procedure after pre-checks are completed and control panel programmed.
Refrigerant Charge
Notes that units are factory-charged with R-410A refrigerant.
Checking Superheat and Subcooling
Details the process for checking evaporator superheat and condensing subcooling.
Leak Checking
Instructions for leak checking compressors, fittings, and piping.
Gas Heat Models
Covers pre-start and post-start checks for gas heat operations.
Manifold Gas Pressure Adjustment
Provides step-by-step instructions for adjusting manifold gas pressure.
SECTION 4 – MAINTENANCE
Provides guidance on routine maintenance tasks for the unit.
General
Emphasizes the importance of a planned maintenance program.
Periodic Maintenance – Monthly
Regular checks including filters, linkages, compressors, and bearings.
Periodic Maintenance – Three To Six Months
Maintenance tasks to be performed every three to six months.
Periodic Maintenance – Yearly
Annual maintenance tasks including fan wheel and drain pan checks.
Entire Unit Inspection
Periodic overall inspections for proper equipment operation.
Sheave Alignment
Explains checking and correcting sheave alignment to prevent failure.
Belts
Guidance on checking and replacing belts as a set.
Belt Replacement
Steps for replacing belts on fan motors.
Belt Tensioning
Instructions for adjusting belt tension using fan skid data plate information.
Filter Drier Replacement
When and how to replace the filter/drier on the refrigerant circuit.
Forward Curved Fans
Procedure for removing and reassembling forward curved fan wheels.
Fan Motor
Steps for replacing the fan motor.
Fan Shaft Bearings
Guidance on removing, replacing, and mounting fan shaft bearings.
Bearing Lock Devices
Describes types of devices used to secure bearings to the fan shaft.
Eccentric Type
Explains the eccentric self-locking collar mechanism.
SECTION 5 – SEQUENCE OF OPERATION
Details the operational logic and sequence for various unit functions.
UNIT TYPE
Explains configuring the control for Constant Volume or Variable Air Volume operation.
OCCUPIED / UNOCCUPIED MODE
Details four methods for placing the unit in occupied or unoccupied mode.
CONSTANT VOLUME MODE (CV)
Outlines four control methods for Constant Volume units.
Thermostat Input
Describes receiving cooling/heating inputs from the thermostat.
Variable Air Volume (VAV)
Details VAV sequence of operation for cooling and heating.
Compressor Staging
Explains how the Unit Controller performs compressor staging.
Condenser Fan Operation
Details the sequence for condenser fan operation based on compressor stages and discharge pressure.
Cooling Compressor Lockout
Prevents mechanical cooling when outdoor temperature is below a setpoint.
Low Ambient Operation
Enables compressor system 1 operation down to 0.0° F with a condenser fan VFD.
Supply Fan Operation
Details programmed values and operation for supply fan control.
VAV Supply Fan Speed Control
Uses PI control to maintain duct static pressure by varying supply fan speed.
Economizer
Covers economizer control methods: Dry Bulb, Single Enthalpy, Dual Enthalpy.
BAS Economizer Operation
Controls economizer damper via external 2 to 10VDC input.
Comfort Ventilation
Uses economizer to control supply air temp, energizing cooling/heating if needed.
Excessive SAT (Supply Air Temperature) Control
Prevents low or high supply air temperatures on CV units.
Space Sensor With Setpoint Adjustment
Resets Occupied Cooling/Heating setpoints using a space sensor potentiometer.
Space Sensor Fault Override Enable
Enables using return air temp if space sensor input is removed.
REMOTE CONTROL
Allows VAV unit setpoint variation via a hardwired 0-10VDC signal.
REDLINE
Temporarily reduces electrical consumption by reducing compressor stages.
LOADSHED
Temporarily reduces electrical consumption by turning off active compressors.
DIRTY FILTER
Initiates an alarm when filter pressure drop exceeds switch setting.
INTELLI-START
Energizes heating/cooling to bring space temp to setpoints before occupancy.
Subsequent Operation
Determines pre-start time for heating/cooling based on previous day's performance.
MORNING WARM UP
Energizes heating section to bring space temperature to conditions before occupancy.
HYDRONIC HEAT
Parameters and sequence for hydronic heating operation.
VENTILATION
Options for ventilation control: Manual, Fixed Minimum, Demand Ventilation.
Demand Ventilation
Modulates outdoor damper to maintain CO2 levels within setpoint +/- 100 PPM.
Ventilation Low Ambient Minimum Position Reset
Resets minimum ventilation setpoint to lower value when outdoor temp is cold.
Exhaust Fan Operation
Configuration options for exhaust fan operation.
Pre-Occupancy Purge
Purges air by running blower and opening economizer during unoccupied period.
Energy Recovery Ventilator
Exhaust fan operates when supply fan is energized for ERV units.
Hot Gas Bypass
Injects discharge gas to artificially load evaporator coil under light load.
Space Temperature Alarm
Generates alarm if space temperature trends away from setpoint for expired time.
SAT Alarm For Heating
Generates alarm if supply air temp goes below setpoint in heating mode.
SAT Alarm For Cooling
Generates alarm if supply air temp goes above setpoint in cooling mode.
Economizer Minimum Position Alarm
Alarms if economizer minimum position is incorrect based on conditions.
Alarm History
Allows viewing the last five alarms stored in the Simplicity Elite control.
SECTION 6 – USER INTERFACE
Describes methods for interfacing with and operating the Simplicity Elite control.
Interface Methods
Explains three methods for interfacing with the Simplicity Elite control.
Unit Controller Interface
Details the four buttons and two displays on the control board for interaction.
Communication Using Simplicity PC
Recommends connecting to PC/computer with Simplicity PC software for setup.
Device Names
Identifies data screens for device names.
Equipment Installation
Identifies data screens for equipment installation parameters.
Sensor Readings
Displays current sensor readings for various inputs.
Economizer/Exhaust
Displays parameters related to economizer and exhaust fan operation.
Fans
Displays parameters related to fan operation, delays, and setpoints.
Cooling Setup
Contains parameters for cooling mode, setpoints, and limits.
Cooling Status
Displays current status of compressors, economizer, and fan delays.
Heating Setup
Contains parameters for heating mode, setpoints, and limits.
Heating Status
Displays current status of heating outputs and controls.
System Options
Lists various system options and their programmed values.
Outputs/Status
Displays current status of unit outputs like fans, compressors, and heating.
Inputs
Shows the status of various unit inputs like sensors and switches.
Comfort/Demand Ventilation
Parameters for Comfort Ventilation and Demand Ventilation (IAQ) settings.
Graphic
Visual representation of unit status with sensor readings.
Clock
Interface for updating the unit's clock.
Weekly Schedule
Explains programming weekly schedules for unit operation.
Holiday Schedule
Explains programming holiday schedules for unit operation.
ALARMS
Displays active and historical alarm information.
Revising Settings
How to change parameter values using the unit controller interface.
SECTION 7 – PARAMETER DESCRIPTIONS AND OPTIONS
Provides definitions for various menu items and parameters.
SECTION 8 – SERVICE
Details service procedures, troubleshooting, and component information.
Analog Input Operation
Describes the function of analog inputs for monitoring unit parameters.
Duct Pressure Transducer
Explains the function and verification of the duct static pressure transducer.
Building Pressure Transducer
Details the function and verification of the building pressure transducer.
Suction Pressure Transducer
Senses and converts suction pressure to DC voltage for evaporator superheat.
CO2 Sensor
Describes CO2 sensor usage for Demand Ventilation and its output.
Faults and Lockouts
Information on unit faults, lockouts, and LED indicators.
Alarm Troubleshooting
Provides guidance on troubleshooting refrigerant system alarm codes.
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