York Official Manual for Air Conditioners D7CG Models
Page 8

530.18-N8Y

NOTE: Install filters so that “Air Flow” arrows point toward the unit.

8.Install filter cover over the end of the hood with one screw (center of hood), securing filters into position.

CAUTION: When proceeding with Steps 9 and 10, extreme care must be exercised while turning both the set point and minimum position adjusting screws to prevent twisting them off.

9.The enthalpy set point for the dampers may now be set by selecting the desired set point from graph in Figure 7. For a single enthalpy economizer, carefully turn the set point

adjusting screw to the “A”, “B”, “C” or “D” setting corre- sponding to the lettered curve. For a dual enthalpy econo- mizer, carefully turn the set point adjusting screw fully clockwise past the “D” setting.

10.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.

11.Replace the filter section access panel.

FIG. 7 - ENTHALPY SET POINT ADJUSTMENT

TABLE 4 - STATIC RESISTANCES

EXTERNAL STATIC PRESSURE DROP

 

 

 

 

 

RESISTANCE, IWG

 

 

 

 

DESCRIPTION

 

 

 

 

 

CFM

 

 

 

 

 

 

1000

1200

1400

1600

1800

2000

2200

2400

2600

2800

3000

Economizer1, 2

0.07

0.08

0.09

0.11

0.13

0.15

0.17

0.20

0.23

0.26

0.30

Bottom Duct Connections1

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.14

0.16

0.19

0.22

1Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.

2The pressure thru the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct system is less than 0.25 IWG, the unit will deliver less CFM

8

Unitary Products Group

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Contents Single Package AIR Conditioners Installation InstructionSunline Table of Contents Installation Service Access Power and Control WiringFilters Condensate DrainDisconnect Switch Bracket for Units With Optional BELT-DRIVE BlowerPipe Sizing GAS PipingExternal SHUT-OFF GAS ConnectionPropane UNITS, Tanks and Piping Never USE a FlameVent and Combustion AIR Hoods Optional Economizer Rain Hood1000 1600 18002200 2400 2600 Economizer1 Bottom Duct Connections1Physical Data Center of GravitySize CFM RPM TON Side Duct Connections @ 230/460/575 VoltsUnit AIR Flow 1560 1077 1095 16301650 1660Superheat Charging Table for Model Blower Circuit Size Breaker Supply Motor AmpacityMIN MAX RLA LRA FLA Amps18.1 20.1 22.2 24.3 28.431.7 34.2 35.4 14.5 16.6 18.7 20.8Utilities Entry Data Knockout Hole Size Used forOperation Cooling SystemCooling Sequence of Operation Heating Sequence of OperationSTART-UP Burner AIR Shutter Adjustment Supply AIR Blower and Temperature Rise AdjustmentsPilot Checkout Burner InstructionsNatural GAS Checking GAS InputGAS Rate Cubic Feet PER Hour Maintenance TroubleshootingNormal Maintenance Cleaning Flue Passages and Heating ElementsModels only

D2CG 072, D7CG 060, D7CG 048, D7CG 036 specifications

The York D7CG 060, D7CG 048, D7CG 036, and D2CG 072 are advanced rooftop unit models designed for enhanced energy efficiency, reliability, and ease of use in commercial HVAC applications. These models are known for their robust features and technologies aimed at providing optimal indoor climate control.

The D7CG series, including the 060, 048, and 036 models, is built around a highly efficient design. They incorporate scroll compressors that operate quietly, contributing to a comfortable environment. The units are designed for high-ambient performance, enabling them to function efficiently even in extreme temperature conditions. The D7CG series also features an intelligent control system that allows for seamless integration with building management systems, optimizing energy usage and enhancing overall system performance.

One of the standout features of the D7CG models is their advanced heat exchanger technology, which improves heat transfer and overall efficiency. The coil design allows for superior airflow and enhanced temperature regulation, ensuring consistent comfort levels throughout the space. With variable-speed fans, these units adjust airflow dynamically, providing further energy savings and tailored climate control.

The D2CG 072 model, on the other hand, accentuates versatility and robustness. This unit also boasts a high-efficiency compressor and features a unique multi-stage heating and cooling process. Its modular design allows for easy installation and maintenance. The D2CG 072 is engineered for flexible configurations, accommodating various building sizes and layouts without compromising performance.

All four models are equipped with user-friendly digital controls that offer precise adjustments and monitoring capabilities. This feature allows building operators to quickly respond to changing conditions, ensuring optimal comfort for occupants while maintaining energy efficiency. Furthermore, they adhere to stringent environmental standards, incorporating low-GWP refrigerants that minimize their ecological footprint.

In summary, the York D7CG 060, D7CG 048, D7CG 036, and D2CG 072 models represent cutting-edge technology and innovative design in the commercial HVAC sector. Their high efficiency, advanced features, and user-centric controls make them suitable for a wide range of applications, ensuring reliable performance and comfort in diverse environments.
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