Bryant 604D--A installation instructions Operation, CO2 Sensor Standard Settings

Page 49

Table 16 – CO2 Sensor Standard Settings

 

 

 

VENTILATION

 

CO2

OPTIONAL

RELAY

SETTING

EQUIPMENT

OUTPUT

RATE

ANALOG

CONTROL

RELAY

HYSTERESIS

(CFM/

OUTPUT

RANGE

SETPOINT

 

 

 

(PPM)

 

 

 

PERSON)

 

(PPM)

(PPM)

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

Proportional

Any

0---10V

0---2000

1000

50

 

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Interface w/Standard Building

Proportional

Any

2---10V

0---2000

1000

50

Control System

7---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

Exponential

Any

0---10V

0---2000

1100

50

 

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

Proportional

15

0---10V

0---1100

1100

50

 

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

Economizer

Proportional

20

0---10V

0---900

900

50

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

Exponential

15

0---10V

1---1100

1100

50

 

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

Exponential

20

0---10V

0---900

900

50

 

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

Health & Safety

Proportional

---

0---10V

0---9999

5000

500

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

Parking/Air Intakes/Loading Docks

Proportional

---

0---10V

0---2000

700

50

4---20mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 17 – CO2 Sensor Standard Settings Economizer Input/Output Logic

 

INPUTS

 

 

 

 

 

OUTPUTS

 

 

 

 

 

 

 

 

 

 

DEMAND

ENTHALPY

 

 

 

COMPRESSOR

N TERMINAL

CONTROL

 

 

 

 

 

 

 

 

 

 

Y1

Y2

STAGE

STAGE

OCCUPIED

UNOCCUPIED

VENTILATION

OUTDOOR

RETURN

 

 

 

 

(DCV)

 

 

 

 

1

2

DAMPER

 

 

 

 

 

 

 

 

 

 

High (Free Cooling

 

On

On

On

On

 

 

 

 

 

 

 

 

 

 

 

Low

On

Off

On

Off

Minimum position

Closed

 

LED off)

 

 

 

 

 

 

 

 

Below set (DCV

 

 

Off

Off

Off

Off

 

 

LED Off)

 

 

 

 

 

 

 

 

Low (Free Cooling

 

On

On

On

Off

Modulating** (between min.

Modulating** (between closed

 

High

On

Off

Off

Off

position and full ---open)

and full ---open)

 

LED on)

 

 

 

 

 

 

 

 

 

 

Off

Off

Off

Off

Minimum position

Closed

 

 

 

 

 

 

 

 

 

 

High (Free Cooling

 

On

On

On

On

Modulating{{ (between

Modulating{{ (between closed

 

 

 

 

 

 

 

Low

On

Off

On

Off

min. position and DCV

 

LED off)

and DCV maximum)

 

 

 

 

 

 

maximum)

Above set (DCV

 

 

Off

Off

Off

Off

 

 

 

 

 

LED On)

 

 

 

 

 

 

 

 

Low (Free Cooling

 

On

On

On

Off

 

 

 

 

 

 

 

 

 

 

 

High

On

Off

Off

Off

Modulating***

Modulating{{{

 

LED on)

 

 

 

 

 

 

 

 

 

 

 

Off

Off

Off

Off

 

 

 

 

 

 

 

 

 

 

 

* For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.

{Power at N terminal determines Occupied/Unoccupied setting: 24 vac (Occupied), now power (Unoccupied). **Modulating is based on the supply--- air sensor signal.

{{Modulation is based on the DCV signal.

***Modulation is based on the greater of DCV and supply--- air sensor signals, between minimum position and either maximum position (DCV) or fully open (supply--- air signal).

{{{Modulating is based on the greater of DCV and supply--- air sensor signals, between closed and wither maximum position (DCV) or fully open (supply--- air signal).

604D-- -- A

OPERATION

Sequence of Operation—When free cooling is not available, the compressor will be controlled by the thermostat. When free cooling is available, the outdoor-air damper is modulated by the Economizer control to provide a 50_ to 55_F (10_ to 12.8_C) supply-air temperature into the zone. As the supply-air temperature fluctuates above 55_ (12.8_C) or below 50_F (10_C), the dampers will be modulated (open or close) to bring the supply-air temperature back within the set points. For Economizer operation, there must be a thermostat call for the fan (G). This will move the damper to its minimum position during the occupied mode.

NOTE: The DCV Max potentiometer must be closed (CCW) when not using CO2 sensor.

Above 50_F (10_C) supply-air temperature, the dampers will modulate from 100% open to the minimum open position. From 50_F to 45_F (10_ to 7.2_C) supply-air temperature, the dampers will maintain at the minimum open position. Below 45_F (7.2_C), the dampers will be completely shut. As the supply-air temperature rises, the dampers will come back open to the minimum open position once the supply-air temperature rises to 48_F (8.9_C). If

power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized. If field-installed accessory CO2 sensors are connected to the Economizer control, a demand controlled ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 set point, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. Damper position will follow the higher demand condition from DCV mode or free cooling mode. Damper movement from full closed to full open (or vice versa) will take between 1 1/2 and 2 1/2 minutes. If free cooling can be used as determined from the appropriate changeover command (dry bulb, enthalpy curve, or differential enthalpy), a call for cooling (Y1 closes at the thermostat) will cause the control to modulate the dampers open to maintain the supply air temperature set point at 50_ to 55_F (10_ to 12.8_C). As the supply air temperature drops below the set point range of 50_ to 55_F (10_ to 12.8_C), the control will modulate the outdoor-air dampers closed to maintain the proper supply-air temperature.

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Contents Safety Considerations Table of ContentsIntroduction Receiving and InstallationCheck Equipment Provide Unit SupportUnit Falling Hazard Rig and Place UnitProperty Damage Hazard 604D--A24-36 Unit Dimensions 604D--A42-60 Unit Dimensions CPRFCURB010A00 SizeCPRFCURB012A00 CPRFCURB013A00Corner Weights Small Cabinet Corner Weights Large Cabinet Select and Install DuctworkRigging/Lifting of Unit See Fig Personal Injury and Electrical Operation Hazard Supply and Return Duct OpeningsProvide for Condensate Disposal Install Electrical ConnectionsHigh-Voltage Connections Unit Component Damage HazardAccessory Electric Heaters Installation Special Procedures for 208-V OperationControl Voltage Connections Standard ConnectionsMinimum Airflow for Reliable Electric Heater Operation CFM Physical Data Unit 604D--A604D a Cont. Ladder Wiring Schematics 208/230-1-60 Connection Wiring Schematics 208/230-3-60 Cont. Ladder Wiring Schematics 208/230-3-60 Connection Wiring Diagram Cont. Ladder Wiring Diagram START-UP Start-Up AdjustmentsCheck for Refrigerant Leaks Checking Cooling and Heating Control OperationIndoor Airflow and Airflow Adjustments Checking and Adjusting Refrigerant Charge604D--A Sequence of Operation Unit Operation HazardSingle Speed Cooling With Higher Electric Heat Speed Two Cooling Fan Speeds Set-up Dehumidification feature usedContinuous Fan Operation Color Coding for Indoor Fan Motor LeadsTypical Heat Pump Operation, Cooling Mode Defrost Control MaintenanceAir Filter Outdoor Fan Outdoor Coil, Indoor Coil, and Condensate Drain Pan604D--A Wet Coil Pressure Drop IN. W.C A24-60 Series aFilter Pressure Drop Table IN. W.C Cooling Charging Table-Subcooling Refrigerant Circuit Electrical Controls and WiringLoss of Charge Switch Pressure SwitchesHigh-Pressure Switch Copeland Scroll Compressor Puron RefrigerantSTART-UP Checklist TroubleshootingSystem Information Puronr R-410A Quick Reference Guide Symptom Cause Remedy Troubleshooting ChartRemove and Store in Job Files TemperaturesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor AmpsAccessories Vertical Economizer Factory Installed Option GeneralInstallation Small ChassisPart Number Filter Part NumberHood Divider Removed Economizer Hood Assembly Horizontal Return Duct Cover Panel and Hood Divider Removal Large ChassisLeft Hood Side Hood Assembly Supply AIR Temperature SAT SENSOR-The supply ConfigurationTemperature Economizer Standard Sensors11.7C 12.8C 14.4C 17.2C 20C 22.8C 25.6C Economizer Controller 604D-- -- a Economizer Wiring Diagram A10200 Cont. Ladder Wiring Diagram A10199 604D-- -- a 604D-- -- a CO2 Sensor Standard Settings Economizer Input/Output Logic CO2 Sensor Standard SettingsOperation Troubleshooting 604D--A 30-36 3 Phase with Economizer 604D--A 42-60 3 Phase with Economizer

604D--A specifications

The Bryant 604D--A is a remarkable heating and cooling unit designed for both efficiency and performance, making it an ideal choice for homeowners seeking optimal climate control solutions. Its impressive array of features, technologies, and characteristics sets it apart in the HVAC market.

One of the standout features of the Bryant 604D--A is its advanced two-stage cooling system. This design allows the unit to adjust its cooling output based on the current temperature and humidity levels, which ensures a comfortable indoor environment while optimizing energy consumption. This two-stage operation is particularly beneficial during transitional seasons when temperatures fluctuate, providing a quieter operation and increased efficiency.

The Bryant 604D--A incorporates high-efficiency compressor technology that maximizes cooling capability while minimizing energy usage. This energy-efficient operation is further enhanced by its excellent SEER (Seasonal Energy Efficiency Ratio) rating. By achieving a high SEER rating, the 604D--A not only promotes energy savings but also contributes to lower utility bills, making it an economically sound investment for homeowners.

Another key characteristic of the Bryant 604D--A is its durable construction. Built with quality materials, this unit is designed to withstand varying weather conditions, ensuring longevity and reliable performance over the years. Its robust design also minimizes vibrations and noise, making it a quieter option compared to many competing systems.

Smart technology integration is also a significant highlight of the Bryant 604D--A. It features wireless connectivity, allowing users to control their heating and cooling settings remotely through a smartphone app. This modern convenience enables homeowners to adjust their indoor climate on-the-go, enhancing user comfort and convenience.

Additionally, the Bryant 604D--A is equipped with an advanced filtration system that helps to improve indoor air quality. By capturing dust, pollen, and other particles, this filtration system ensures that the air circulating within the home remains clean and healthy.

In conclusion, the Bryant 604D--A is a high-performance HVAC unit that excels in energy efficiency, durability, and convenience. With its advanced technology, quiet operation, and user-friendly features, it stands as a premier choice for those looking to elevate their home comfort while maintaining cost-effectiveness and sustainability. Whether for new installations or as a replacement for an outdated system, the Bryant 604D--A is undoubtedly a leader in modern climate control solutions.
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