York D2CE, D2CG300 VENT AND COMBUSTION AIR HOODS DCG Models, Vent And Combustion Air Hoods

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VENT AND COMBUSTION AIR HOODS (DCG Models)

530.18-N11Y

VENT AND COMBUSTION AIR HOODS (DCG Models)

Two vent hoods and a combustion air hood (with screens) are shipped attached to the blower housing in the blower compartment. These hoods must be installed to assure proper unit function. All hoods must be fastened to the outside of the gas heat access panel with the screws provided in the bag also attached to the blower housing.

The screen for the combustion air intake hood is secured to the inside of the access panel opening with four fasteners and the screws used for mounting the hood to the panel. The top flange of this hood slips in under the top of the access panel opening when installing. Refer to the Vent and Combustion Hood figure.

Each vent hood is installed by inserting the top flange of the hood into the slotted opening in the access panel and securing in place.

 

SLOTTED

VENT AIR

OPENINGS IN

ACCESS PANEL

OUTLET

 

HOODS

 

COMBUSTION AIR INTAKE

HOOD

GAS HEAT

ACCESS

PANELS

FIG. 8 - VENT AND COMBUSTION AIR HOODS

OPTIONAL ECONOMIZER/MOTORIZED DAMPER RAIN HOOD

The instruction for the optional economizer/motorized damper rain hood can be found in form 44-320-2. Use these instructions when field assembling an economizer rain hood onto a unit. The outdoor and return air dampers, the damper actuator, the damper linkage, the outdoor and return air divider baffles, and all the control sensors are factory mounted as part of the "Factory installed" economizer option.

ENTHALPY SET POINT ADJUSTMENT

Remove the economizer access panel from the unit to check the following adjustments. Loosen but do not remove the two panel latches.

CAUTION: Extreme care must be exercised in turning both the setpoint and minimum position adjusting screws to prevent twisting them off.

1.The enthalpy set point may now be set by selecting the desired setpoint shown in the Enthalpy figure. Adjust as follows:

•For a single enthalpy operation, carefully turn the set point adjusting screw to the “A”, “B”, “C” or “D” setting corresponding to the lettered curve.

•For a dual enthalpy operation, carefully turn the set point adjusting screw fully clockwise past the “D” setting.

2.To check that the damper blades move smoothly without binding, carefully turn the minimum position adjusting screw fully clockwise and then energize and de-energize terminals “R” to “G”. With terminals “R” to “G” energized, turn the minimum position screw counterclockwise until the desired minimum position has been attained.

3.Replace the economizer access panel. Reposition the two latches horizontally and retighten the screws.

POWER EXHAUST/BAROMETRIC RELIEF DAMPER AND RAIN HOOD OPTION

The instructions for the power exhaust/barometric relief damper and rain hood can be found in form 44-320-10. The exhaust fan, all supporting brackets, angles, and the wiring are factory installed as part of the power exhaust option.

All of the components, including the dampers, hardware, and mounting instructions are shipped in a single package external from the unit. The hood must be field assembled and installed.

Power exhaust is not available as a field installed option.

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Unitary Products Group

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Contents INSTALLATION INSTRUCTION SAFETY CONSIDERATIONSFOR YOUR SAFETY If you smell gas 1.Open windows FOR YOUR SAFETYTABLE OF CONTENTS INSTALLATIONMAINTENANCE & TROUBLESHOOTING OPERATIONINSTALLATION LIMITATIONSTABLE 1 - UNIT APPLICATION DATA LOCATIONSERVICE ACCESS DUCTWORKFIXED OUTDOOR AIR INTAKE DAMPER FIG. 3 - FIXED OUTDOOR AIR DAMPERCONTROL WIRE SIZES FIG. 5 - TYPICAL FIELD WIRINGPOWER AND CONTROL WIRING THERMOSTATOPTIONAL ELECTRIC HEATERS DCE Models TABLE 2 - GAS HEAT APPLICATION DATAL.P. UNITS, TANKS AND PIPING DCG Models FIG. 7 - BOTTOM SUPPLY CONNECTIONEXTERNAL SHUT-OFF OPTIONAL ECONOMIZER/MOTORIZED DAMPER RAIN HOOD VENT AND COMBUSTION AIR HOODS DCG ModelsFIG. 8 - VENT AND COMBUSTION AIR HOODS Unitary Products Group FIG. 9 - ENTHALPY SETPOINT ADJUSTMENT530.18-N11Y TABLE 6 - ELECTRICAL DATA - UNITS w/ELECTRIC HEAT TABLE 4 - PHYSICAL DATATABLE 5 - ELECTRICAL DATA - BASIC UNITS Cont’d FIG. 10 - DIMENSIONS & CLEARANCES - DCE & DCGUTILITIES ENTRY DATA ACCESSORY SIDE SUPPLY AND RETURN AIR OPENINGS REAR VIEWDETAIL “X” DETAIL “Y” UNIT WITH RAIN HOODS4 POINT LOADS 6 POINT LOADSFIG. 11- FOUR AND SIX POINT LOADS TABLE 7 - FOUR AND SIX POINT LOADSTABLE 12 - BLOWER MOTOR AND DRIVE DATA TABLE 11 - POWER EXHAUST PERFORMANCETABLE 10 - STATIC RESISTANCES SAFETY CONTROLS OPERATIONCOOLING SYSTEM PRELIMINARY OPERATION COOLINGTABLE 9 - HEAT ANTICIPATOR SETTING HEAT ANTICIPATOR SETPOINTSGAS HEATING SEQUENCE OF OPERATION FIG. 12 - GAS VALVE PIPINGTABLE 10 - LIMIT CONTROL SETTING MANIFOLD GAS PRESSURE ADJUSTMENTSTART-UP PRE-STARTCHECK LISTFIG. 15 - PROPER FLAME ADJUSTMENT BURNER AIR SHUTTER ADJUSTMENTFIG.17 - BELT ADJUSTMENT PILOT CHECKOUTTABLE 11 - GAS RATE - CUBIC FEET PER HOUR ADJUSTMENT OF TEMPERATURE RISECHECKING GAS INPUT FIG. 19 - TYPICAL FLUE BAFFLE INSTALLATION MAINTENANCENORMAL MAINTENANCE TROUBLESHOOTING TROUBLESHOOTING - Cont’d REPLACEMENT PARTS 530.18-N11Y Unitary Products GroupCode SBY
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D2CG300, D2CE specifications

The York D2CE and D2CG series represent cutting-edge advancements in energy-efficient chiller technology, specifically designed to optimize performance in a variety of commercial and industrial applications. These chillers are known for their ability to deliver reliable cooling while minimizing energy consumption, making them a preferred choice for businesses aiming to reduce their carbon footprint and operational costs.

One of the standout features of the York D2CE and D2CG chillers is their utilization of advanced scroll compressor technology. This technology not only enhances the reliability of the systems but also significantly improves energy efficiency, allowing for lower operational costs. The chillers are built to provide high efficiency across a diverse range of operating conditions, ensuring consistent performance during peak loads.

The D2CE series, designed primarily for air-cooled applications, benefits from a compact and modular design, allowing for flexible installation in tight spaces. Additionally, its quiet operation makes it suitable for use in noise-sensitive environments, such as healthcare facilities and educational institutions. The model is equipped with microprocessor controls that facilitate precise temperature regulation and system diagnostics, ensuring optimal operation.

Conversely, the D2CG series focuses on water-cooled applications, featuring robust construction that accommodates higher cooling capacities. This model also includes advanced heat exchanger technology, which maximizes heat transfer efficiency. The D2CG’s intelligent controls not only help in energy management but also provide remote monitoring capabilities, allowing facility managers to analyze performance and troubleshoot issues from anywhere.

Both models utilize environmentally friendly refrigerants, aligning with global regulations and promoting sustainability. Enhanced filtration options are available, enabling the units to maintain high indoor air quality by minimizing dust and other pollutants.

In addition to their energy-saving attributes, the York D2CE and D2CG chillers are designed for ease of maintenance, with accessible components and modular parts that simplify service procedures. This, coupled with their durable construction, leads to greater longevity and reliability in operation.

In summary, the York D2CE and D2CG chillers are leading examples of modern HVAC engineering, combining efficiency, flexibility, and sustainability. Their innovative technologies and thoughtful design make them an excellent addition to any facility looking to enhance its cooling systems while adhering to environmental standards.
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