Bryant 607C-A installation instructions 11.7C 12.8C 14.4C 17.2C 20C 22.8C 25.6C

Page 38

607C-- -- A

LOW TEMPERATURE COMPRESSOR LOCKOUT SWITCH—The Economizer is equipped with a low ambient temperature lockout switch located in the outdoor airstream which is used to lock out the compressors below a 42_F (5.6_C) ambient temperature.

Economizer Control Modes—Determine the Economizer control mode before set up of the control. Some modes of operation may require different sensors. Refer to Table 11. The Economizer is supplied from the factory with a supply air temperature sensor, a low temperature compressor lockout switch, and an outdoor air temperature sensor. This allows for operation of the Economizer with outdoor air dry bulb changeover control. Additional accessories can be added to allow for different types of changeover control and operation of the Economizer and unit.

OUTDOOR DRY BULB CHANGEOVER— The standard controller is shipped from the factory configured for outdoor dry bulb changeover control. The outdoor air and supply air temperature sensors are included as standard.

For this control mode, the outdoor temperature is compared to a selectable set point on the sensor. See Fig. 40. If the outdoor-air temperature is above the set point, the Economizer will adjust the outdoor air dampers to minimum position. If the outdoor-air temperature is below the set point, the position of the outdoor-air dampers will be controlled to provide free cooling using outdoor air. When in this mode, the LED next to the free cooling set point potentiometer will be on. The changeover temperature set point is set using the switches on the sensor. See Fig. 40 for the corresponding temperature changeover values.

In this mode of operation, the outdoor-air temperature is compared to the return-air temperature and the lower temperature airstream is used for cooling. When using this mode of changeover control, turn the free cooling/enthalpy set point potentiometer fully clockwise to the D setting. See Fig. 39 and Fig. 44.

EXHAUST FAN

SETPOINT

LED LIGHTS WHEN

EXHAUST CONTACT

IS MADE

MINIMUM DAMPER

POSITION SETTING

MAXIMUM DAMPER DEMAND

CONTROL VENTILATION

SETPOINT

LED LIGHTS WHEN

DEMAND CONTROL

VENTILATION INPUT

IS ABOVE SETPOINT

DEMAND CONTROL

VENTILATION SETPOINT

LED LIGHTS WHEN

OUTDOOR AIR IS

SUITABLE FOR FREE

COOLING

ENTHALPY

CHANGEOVER SETPOINT

A09708

Fig. 39 - Economizer Controller Potentiometer and LED

Locations

(8.9°C)

(11.7°C)

(12.8°C)

(14.4°C)

(17.2°C)

(20°C)

(22.8°C)

(25.6°C)

A10134

Fig. 40 - Outdoor Air Temperature Changeover Set Points

ECONOMIZER

RETURN AIR

SENSOR

RETURN DUCT (FIELD-PROVIDED)

A09710

Fig. 41 - Enthalpy Sensor Mounting Location

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Contents Table of Contents Safety ConsiderationsCheck Equipment Receiving and InstallationIntroduction Provide Unit Support607--A24-30 Unit Dimensions 607--A36-60 Unit Dimensions SMALL/COMMON Curb Rigging/Lifting of Unit See Fig Rig and Place UnitInspection Unit Falling HazardSelect and Install Ductwork Personal Injury and Electrical Operation HazardHigh-Voltage Connections Install Electrical ConnectionsProvide for Condensate Disposal Unit Component Damage HazardStandard Connections Accessory Electric Heaters InstallationSpecial Procedures for 208-V Operation Transformer ProtectionCondensate Trap Physical Data Unit 607--A Minimum Airflow for Reliable Electric Heater Operation CFMConnection Wiring Schematics 208/230-1-60 Cont. Ladder Wiring Schematics 208/230-1-60 607C a Cont. Ladder Wiring Schematics 208/230-3-60 Connection Wiring Diagram Cont. Ladder Wiring Diagram Check for Refrigerant Leaks Start-Up AdjustmentsSTART-UP Checking Cooling and Heating Control OperationTwo Cooling Fan Speeds Set-up Dehumidification feature used Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments Unit Operation HazardColor Coding for Indoor Fan Motor Leads Single Speed Cooling With Higher Electric Heat SpeedContinuous Fan Operation Defrost Defrost ControlQuiet Shift Indoor Blower and Motor MaintenanceAir Filter Personal Injury and Unit Damage Hazard607--A Wet Coil Pressure Drop in. W.C Filter Pressure Drop Table in. W.COutdoor Coil, Indoor Coil, and Condensate Drain Pan Cooling Charging Table-SubcoolingRefrigerant Circuit Electrical Controls and WiringOutdoor Fan Indoor AirflowHigh-Pressure Switch Pressure SwitchesLoss of Charge Switch Copeland Scroll Compressor Puron RefrigerantSystem Information TroubleshootingSTART-UP Checklist Puronr R-410A Quick Reference Guide Troubleshooting Chart Symptom Cause RemedyPreliminary Information Model no TemperaturesRemove and Store in Job Files III. START-UP Electrical Supply Voltage Compressor AmpsInstallation Vertical Economizer Factory Installed Option GeneralAccessories Small ChassisEconomizer Hood Top Panel Removal Filter Part NumberHood Divider Removed Economizer Hood Assembly Large Chassis Horizontal Return Duct Cover Panel and Hood Divider RemovalLeft Hood Side Hood Assembly Economizer Standard Sensors ConfigurationSupply AIR Temperature SAT SENSOR-The supply 11.7C 12.8C 14.4C 17.2C 20C 22.8C 25.6C Economizer Controller 607C-- -- a Economizer Wiring Diagram A10200 Cont. Ladder Wiring Diagram A10199 607C-- -- a 607C-- -- a Operation CO2 Sensor Standard SettingsCO2 Sensor Standard Settings Economizer Input/Output Logic Troubleshooting 607C--A 30 3 Phase with Economizer 607C--A 36-60 3 Phase with Economizer
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