mars 7602-457 Communicating Programmable Thermostat Instruction Manual

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Installation Manual - 7602-457 Communicating, Programmable Thermostat  

Installation Manual  

7602-457  

Communicating, Programmable Thermostat  

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517.787.2100 • www.marsdelivers.com  

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General	Details
Name	mars 7602-457 Communicating Programmable Thermostat Instruction Manual
Make	MARS
Language	English
Filetype	PDF (Download)
File size	0.49 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• MARS

mars 7602-457 Communicating Programmable Thermostat Instruction Manual Overview

Summary of Contents

• Page 1: Installation manual for the communicating, programmable thermostat. Model number: 7602-457.
• Page 2: Installation manual for the communicating, programmable thermostat includes important cautions for installers and service personnel. End users are not advised to change or modify settings, as this may cause equipment malfunction and void warranties. The table of contents outlines various sections, including safety and installation considerations, user menu settings, and installer menu settings. Key topics include thermostat configuration, system configuration, airflow selection, and air cleaner settings. Additional sections cover humidity configuration, temperature algorithms, and demand reduction configuration. Service mode and manual operation instructions are provided, along with control diagnostics and dipswitch configuration. Fault history and options for clearing fault history are also included. Multi-unit configuration and diagnostics are addressed, as well as accessory configurations like air filters and humidifiers. The document concludes with a revision history section.
• Page 3: Installation manual for the 7602-457 communicating, programmable thermostat. The thermostat is designed to complement Comfort-Aire and Century's geothermal heat pump system. It offers customizable climate control features to maximize comfort and reduce energy consumption. Instructions should be followed carefully to ensure optimal performance and cost savings. Safety considerations include turning off all power to the unit before installation. Improper wiring or installation may damage the thermostat and must conform to local and national electrical codes. The thermostat requires no batteries and must have both R and C terminals connected. Thermostat location is crucial; it should be mounted approximately 5 ft above the floor in a frequently used room. Avoid mounting the thermostat close to windows, outside walls, or areas with direct light and heat. Excess wire should be pushed back into the wall to prevent interference with the temperature sensor.
• Page 4: Installation manual for the communicating, programmable thermostat includes user menu settings and offsets for temperature and humidity calibration. The auto changeover time determines the duration before switching between heating and cooling modes. The temperature offset function compensates for discrepancies between the thermostat's reading and actual room temperature. Demo mode showcases heat pump operation with specific settings for temperature offsets. To enter demo mode, access the service information screen and hold the right arrow for five seconds. Humidity offset allows calibration of the humidity sensor for accurate readings. The thermostat must be configured for multistage and auxiliary heat by the installer to access specific differential settings. Control demo mode operation parameters from the demo operation screen. The thermostat automatically selects heating or cooling mode in AUTO mode based on indoor temperature. Adjustments for both temperature and humidity offsets can be made using the up/down arrow buttons, with changes saved by pressing the center button.
• Page 5: Installation manual for the communicating, programmable thermostat outlines the starting mode based on loop temperature. The unit operates in heating or cooling depending on the temperature when demo mode is entered. The algorithm determines whether to start in cooling or heating mode based on specific temperature thresholds. Solid lines indicate heating operation while dashed lines indicate cooling operation. To exit demo mode, power must be removed from the thermostat.
• Page 6: Installation Manual Communicating, Programmable Thermostat Installer Menu Settings Access Adjust the staging option using the up/down arrow buttons. Press the center button to save changes. Single Stage – for control of a single stage compressor applications. Multi-Stage (default) – for control of multi-stage compressor applications. The Installer Settings can be accessed at any time from the Main Operating screen. Adjust the Auxiliary Heat options using the up/down arrow buttons. Electric (default) – for control of a system with electric auxiliary heat. Multi-Fuel – for control of a system with furnace for auxiliary heat. No Auxiliary Heat – for control of a system with no auxiliary heat.
• Page 7: Installation manual for the communicating, programmable thermostat includes critical information on system configuration and airflow selection. Adjust airflow settings for each system operating mode using the up/down arrow buttons and select each item with the center button. The system configuration option on the start-up screen allows adjustment of critical equipment settings. Airflow settings have a valid range obtained from control in 25 CFM increments. The blower off delay has a default of 60 seconds with a valid range of 0 to 255 seconds in 5 second increments. The airflow selection menu will not be present if the connected communicating control system has no blower. The airflow settings will only be present if the connected communicating control is configured for ECM blower. The pump configuration menu will not be present if the connected communicating control is configured for no loop configuration. The valve configuration menu will not be present if the connected communicating control is configured for no loop configuration. Motorized valve settings and compressor anti-short cycle delay settings are also included for equipment protection.
• Page 8: Installation manual for the communicating, programmable thermostat includes important sections on pump configuration and unit configuration. Pump configuration can be controlled through temperature differential or set to specific speed. This is a commercial option only and does not alter residential unit operation. The system can be configured for either single pumping or parallel pumping. Temperature differentials can be configured at the thermostat for vFlow units with an internal flow control pump. Unit configuration settings include heat pump family, heat pump size, blower type, and loop configuration. Valid ranges for heating and cooling delta T are specified in the manual. Airflow, pump, and valves can be configured from the system configuration screen. Selecting 'VS Pump' applies an internal variable speed flow controller with other flow controllers on a single loop in parallel. Refer to section 3.6.3 for multi-unit configuration instructions.
• Page 9: Installation Manual Communicating, Programmable Thermostat Pump configuration Heating stage 1 Cooling stage 2 Configure temperature differentials at the thermostat for vFlow™ units with a motorized modulating valve. Heating Delta T (default stored in control) – valid range: 4 to 12ºF (in 1ºF increments) Cooling Delta T (default stored in control) – valid range: 9 to 20ºF (in 1ºF increments) Multi-unit airflow selection For certain commercial multi-unit applications, the modulating valve can be kept slightly open by choosing an off position value between 3.3-4.0. If multiple units are connected to one ATC thermostat upon unit start-up, the thermostat will automatically register the serial numbers of all units connected to it.
• Page 10: Installation Manual Communicating, Programmable Thermostat Adjust the Humidifier Reminder settings using the up/down arrow buttons. In section 3.2, when an installer selects “Option Selection” from the System Configuration menu, the installer may choose the unit to configure by the last 4 digits of its serial number. Cumulative Run Time (default Off) – valid range: Off, 400 to 3600 hours (in 100 hour increments). Calendar Time (default Off) – valid range: Off, 3 to 24 months (in 3 month increments). This feature displays an alert to remind the user to change the UV lamps after the selected time has passed. To configure Unit, Pump, and Valve options in sections 3.3-3.5, the thermostat must be connected to only one unit at a time. A service message will flash at the top of the Main screen when a service timer expires to alert the user that it is time to service these options. Enter/edit the Dealer Information settings, including Brand Name, Model Number, Serial Number, Contractor Name, and Contractor Phone number. This feature displays an alert to remind the user to change the air filter after the selected time has passed.
• Page 11: Installation manual for the communicating, programmable thermostat includes important configuration notes for humidity control settings. Humidity configuration requires first stage heating or cooling to be active for a minimum of 5 minutes before energizing the second stage. Dehumidification output activates when humidity exceeds the setpoint, while humidification output activates when humidity is below the setpoint. The anticipator setting allows adjustment to correct temperature overshooting or undershooting. Adjusting the anticipator value affects thermostat sensitivity; lower values increase sensitivity, while higher values decrease it. The differential adjustment varies the degrees from the setpoint before a call for heating or cooling is made. Proportional integral logic uses a combination of temperature differential and operating time for heating or cooling stages. Cycles per hour setting allows adjustment of the maximum number of on/off cycles to maintain desired indoor temperature. The default setting for cycles per hour is 4, with options for tighter temperature control at 6 cycles. The document outlines various logic configurations for temperature control to meet setpoints effectively.
• Page 12: Installation Manual Communicating, Programmable Thermostat Smart Heat Staging defines the minimum amount of time to wait before activating auxiliary heating. Adjust the Smart Heat Staging setting using the up/down arrow buttons. Electric heat lockout keeps electric heat turned off if the outdoor temperature is above the specified temperature. Manual Operation mode allows the service personnel to manually command operation for any of the thermostat outputs. Demand Reduction is activated by an input signal at the unit control board to reduce the electric load while peak utility rates are high. The Demand Reduction Configuration mode selects which of the available unit control inputs is to be used as the activation signal. Control Diagnostics mode allows the service personnel to view the status of all physical inputs, switches, temperature sensor readings, as well as the operational status of the pump at the thermostat. Navigate between diagnostic screens using the left/right arrow buttons.
• Page 13: Installation manual for the communicating, programmable thermostat includes important notes regarding pump status and configuration settings. Pump status will not be present if the connected communicating control is not configured for pump control configuration. If multiple units are connected to one thermostat, refer to section 9.6 for guidance. Control diagnostics provide temperature readings and system statuses for various components. Fault history mode displays the five most recent stored fault codes for the connected communicating control. Dipswitch configuration mode allows service personnel to view the status of all dipswitch settings at the thermostat. The unit control dipswitch settings cannot be changed from the thermostat. Navigate between configuration screens using the left/right arrow buttons. Control configuration includes various settings for accessories and operational modes. Refer to specific sections for detailed instructions on multiple unit connections and diagnostics.
• Page 14: Installation manual for the communicating, programmable thermostat. Fault conditions menu includes various fault types such as temperature, flow, and configuration conditions. Displays detailed temperature readings recorded at the time of the fault. Displays the status of dipswitch settings recorded at the time of the fault. Possible causes for faults include low water coil temperature and incorrect settings. Fault temperature conditions indicate low water temperature at specific times. Flow conditions display blower and pump speed or valve position readings at the time of the fault. Input/output conditions show the status of physical and communicated inputs and outputs during the fault. Clearing fault history will remove all stored fault codes and history from the thermostat and connected controls. Refer to specific sections for guidance when multiple units are connected to one thermostat.
• Page 15: Installation Manual Communicating, Programmable Thermostat Mult-Unit Diagnostics Mult-Unit Fault Info Service personnel will see a screen to select a specific unit by the last 4 digits of its serial number. When multiple units are connected to one thermostat, the service personnel views each unit’s fault information by selecting the next option. Multiple units may be connected directly to the ATC thermostat or connected to one another in series. Restore Defaults The thermostat will reset all settings, excluding the thermostat configuration settings, to their factory defaults. Connections on DXM2 board allow for multi-unit installation.
• Page 16: Installation manual for the communicating, programmable thermostat outlines important information regarding product improvements, specifications, and dimensions. The installer is responsible for ensuring compliance with applicable regulations. Additional responsibilities include verifying dimensional data on the actual product. Preparations must be made before beginning any installation. Incentive and rebate programs have specific requirements related to product performance and certification. All products must meet applicable regulations in effect on the date of manufacture. Certifications are not necessarily granted for the life of a product. It is the responsibility of the applicant to determine whether a specific model qualifies for these incentive programs. Model qualifications are essential for incentive and rebate programs.