Related Manuals for Lennox ComfortSense 8500
Summary of Contents for Lennox ComfortSense 8500
- Page 1 Installation and Setup Guide ComfortSense 8500 Commercial ® Programmable Thermostat Series - (14X57 and 14X58) (Zoning) 507612-02 9/2018 Supersedes 507612-01...
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Page 2: Table Of Contents
Table of Contents Shipping and Packing List Shipping and Packing List ........... 2 Verify the following items have been included with Thermostat Features ........... 3 in the packing: Product Dimensions ............ 3 Unit Dimensions (H x W x D) ........... 3 Wall Plate Dimensions (H x W) .......... -
Page 3: Thermostat Features
® equipped with Prodigy. Plate dimensions: 4-1/2” x 5-3/4” (114 x 146mm) models can be used to control Lennox’ premium rooftop unit Demand Control Ventilation features Wiring Specifications based on CO set points and conditions stored in the unit controller. -
Page 4: Remote Sensor Wire
Table 3. Twisted Pair Communication Wiring Installation (SysBus - Yellow) Unpacked the CS8500 and open the case with Catalog a thin-blade screwdriver. Place between wall Item Number base and unit and twist to separate unit from base. 500 foot roll 27M19 1000 foot roll 94L63... - Page 5 • Non-heated or non-cooled areas such as an outside wall behind the sensor. Wall Plate (optional) Use the following steps: a. Determine location using best practices. b. Use the provided wall plate as a template Thermostat Back Plate to determine location cutout for wiring and Run thermostat wire location for wall anchors.
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Page 6: Terminal Connections
IMPORTANT! Terminal Connections External sensors use standard thermostat wiring; Damage to the ComfortSense 8500 may occur if and may be wired using two wires of a multiple wire 24VAC polarity is not maintained. cable. Wire run should not exceed 300 feet (100m). - Page 7 24VAC HOT 2 CONDUCTOR #20 (MIN) TSTAT CONNECT SHIELDS NEXT CS8500 ZONE BUS BLACK ZONE BUS- SENSOR LENNOX COMM ZONE BUS+ CABLE (PURPLE) BLACK ZONE LINK T OC OC CM-CM+ C DO SG HR FR RH R CS8500 ZONING Figure 3. CS8500 Zoning Connections (14X57 or 14X58)
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Page 8: Installing Indoor Temperature Sensors
Installing Indoor Temperature Sensors Wire external sensors as illustrated below. Up to nine sensors may be used in averaging sensor applications. Use Lennox catalog numbers 10kΏ (47W37) or 11kΏ (94L61). Sensors are not polarity sensitive. Figure 4. Temperature Sensor Wiring (parallel) The CS8500 will calculate the average temperature readings from all connected external temperature sensors. -
Page 9: Installing Occupancy Sensor
Installing Occupancy Sensor When occupied the sensor will output 24VAC and 0VAC when unoccupied. Below is an example on how to make connections for a occupancy sensor. Figure 5. Occupancy Sensor Connections and 24VAC Transformer... -
Page 10: Fan And Heat Relay Outputs
Fan and Heat Relay Outputs Table 5. Fan and Heat Relay Outputs Local Heat Mode Heating Mode First and Second Stage First Stage Heat Second Stage Heat Heat Heat Heat Heat Heat Type Type Output Output Output Output Output Output None None Series... -
Page 11: Ntc Or Unit Controller System Setups
• 3 = Zone temperature and IAQ (A63) NTC or Unit Controller System Setups • 10 = Zone temperature and indoor RH (A91) The optional settings (M2 ECTOs or M3 Parameters) • 11 = Zone temperature, IAQ, and indoor RH can be adjusted using Unit Controller software, a PC with UC software, and L Connection PC converter. -
Page 12: M3 Unit Controller - Return Air Temperature Limits Setup
To enable this feature set parameters 113 and 115 locally at the Prodigy 2.0 unit controller which is located inside Lennox rooftop unit. • Adjusting parameter 113 enables return room temperature limits. Default is 0 (OFF). To enable set to 1 (ON). Go to SETTINGS > RTU OPTION >... -
Page 13: Thermostat Zoning Configuration
• Damper Position CS8500 Zoning Configuration • Momentary Back Light - Display back light intensity within 30 seconds of button being Multiple CS8500s (14X57 or 14X58) cannot be pressed. connected directly to the Prodigy Unit Controller for zoning applications. From the Prodigy unit controller •... -
Page 14: Damper
• Heating Deadband - Defines the temperature Cooling above demand start temperature that ends the • Cooling Votes (1st Stage; 2nd Stage) demand. ˃ 0:0 - No votes (no affect on system cooling • Heating Integration Constant - The integration demands). -
Page 15: Setpoint Range And Sensor Calibration
Setpoint Range and Sensor Calibration There is a set point adjustment range except when the zone is in manual mode. • Internal temperature offset calibration. • External temperature offset calibration. • RH offset calibration. Troubleshooting Make sure the CS8500 is displayed on the NCP network list. -
Page 16: Parameters (Ectos)
Parameters (ECTOs) Table 6. Parameters NAME DESCRIPTION DEF. UNIT Notes Option 1, Disable override button Damper DISPLAY_ Set points Outdoor Temperature Zone Temp. High Resolution Setpoint High Resolution 98($62) Upper nibble: bright setting, lower BACKLIGHT nibble: dim setting SP_ADJ_ Setpoint Adjustment Range °F °F IT_CAL... - Page 17 Table 6. Parameters NAME DESCRIPTION DEF. UNIT Notes RH_CAL Calibration factor, RH sensor -200 Last of the CO2_CAL Calibration factor, CO sensor Sensor Only ECTOs. FAN_TYPE None, series, parallel None Parallel None HEAT_TYPE None, reheat, auxiliary, peripheral None Peripheral None DAMP_MIN Minimum damper position DAMP_MAX...
- Page 18 Table 6. Parameters NAME DESCRIPTION DEF. UNIT Notes °F CLG_DF First cooling setpoint differential Counts °F CLG_DF2 2nd cooling setpoint differential Counts °F CLG_DB Cooling deadband Counts 2550 1200 0 is no CLG_TI Integration constant, cooling integration Count term. 0 or 31 is no PI control;...
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Page 19: Menu Options
Table 6. Parameters NAME DESCRIPTION DEF. UNIT Notes 2550 1200 0 is no HTG_TI Integration constant, heating integration Count term. °F 0 or 31 is no PI control; damper HTG_PB Proportional constant, heating operates at reset value. Supply air differential, determines if SA_DF °F suitable for heating... -
Page 20: Owner Settings
Owner Settings Temperature Sensor Config. Temp. Sensor source by default is set to See the included user guide for further details. internal temp. sensor. The other option is Technician Settings external temp. sensor(s). When external temp. sensor(s) is selected, the following settings If you need to access the technician settings option need to be configured;... - Page 21 Temperature Adjustment Range technician to check the HVAC system after the CS8500 setup has been completed. Test The adjustment range for screen unlock is options are fan relay, heater relay and damper 0 to 10 degrees in increments of 1 degree. position.
- Page 22 • When damper invert option is set to ON, Table 8. Damper Invert is ON the analog control for the damper actuator is a 2-10VDC with 2VDC being fully closed. Damper Position (%) Control Voltage (VDC) The CS8500 uses percent (%) for bypass 0 (closed) damper position.
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Page 23: System Status Descriptions
System Status Descriptions ··· The technician system status icon screen can be access by pressing the (three dots) which is located on the left side of the home screen. Then press the view status option. Press the red toolbox to access the technician system status screen. Technician pin 864 is required to access that screen. - Page 24 Table 9. System Status Descriptions Icon Icon Description Location When either of following error occur, this icon would be displayed. • Some RTU compr. Locked Home • All RTU compr. Locked Screen • RTU fault state - fault detected • CS fault state - fault detected Technician Status There are communication errors.
- Page 25 Table 9. System Status Descriptions Icon Icon Description Location Technician Status Fresh air tempering cooling Screen Technician Status Fresh air tempering dehumidifying. Screen Technician This status is displayed when the RTU compressor has partially failed Status (or generates an error). Screen Technician This status is displayed when all RTU compressors have failed (or...
- Page 26 Table 9. System Status Descriptions Icon Icon Description Location When the CS8500 (CS) state has a fault state, this icon would be displayed. The following possible errors may have occurred which would generate this icon: • Local Temp Sensor error Technician Status •...
- Page 27 Table 9. System Status Descriptions Icon Icon Description Location The box heater is “none” and satisfies “room temperature + SA_ DF Discharge Air Temperature” when there is a heat demand Technician Status There is a cool request, but the RTU is not in the cooling state Screen This Status is displayed when either of the above 1 or 2 is satisfied...
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Page 28: Error Codes And Reminders
Error Codes and Reminders Table 10. Error Codes Action to Clear / Recovery Condition Issue Display System Action Condition If the sensor starts detecting a Built-In Temp Indoor temp is normal operating range, the error Sensor error displayed as “--” on the message will automatically clear - temperature Temperature... - Page 29 Table 10. Error Codes Action to Clear / Recovery Condition Issue Display System Action Condition System will restore all settings to factory default and resume EEPROM error Memory Contact service contractor to operations. Critical (power-on) Error replace the CS8500. This error is displayed in notification screen.
- Page 30 Table 10. Error Codes Action to Clear / Recovery Condition Issue Display System Action Condition The reading for CO2 is not valid. This message indicates Contact service contractor to CO2 sensor is not replace the CS8500. Sensor error working correctly. - sensor reads If the sensor starts detecting a Sensor...
- Page 31 Table 10. Error Codes Action to Clear / Recovery Condition Issue Display System Action Condition User will have to contact the Service Contractor to have the This error is displayed system serviced. All RTU All RTU in notification screen Critical compressors compressors Will need to check RTU state...
- Page 32 Table 10. Error Codes Action to Clear / Recovery Condition Issue Display System Action Condition If measurement of the return air temperature sensor is out of specified range (including open / Return Air Return short detection, the alarm will be Temperature Displayed in Minor...