York D2CG 072, D7CG 036, D7CG 048 Vent and Combustion AIR Hoods, Optional Economizer Rain Hood

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VENT AND COMBUSTION AIR HOODS

The vent and combustion air hoods are shipped attached to the blower housing in the blower compartment. These hoods must be installed on the outside of the gas heat access panel to ensure proper unit function. The necessary mounting screws are provided in a 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 three 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 Figure 5. Remove the protective label covering the opening just prior to installing this hood.

The vent hood (including its screen) is installed by inserting the top flange of the hood into the slotted opening in the access panel. The top screw secures the hood to the access panel. The remaining two side screws must be installed after the access panel is installed on the unit. These screws engage the bottom flue box flange.

CAUTION: All three screws in the vent hood must be properly installed before furnace operation to insure all com- bustion products are exhausted from the unit.

FIG. 5 - VENT AND COMBUSTION AIR HOODS

OPTIONAL ECONOMIZER RAIN HOOD

The following procedure should be used when assembling an economizer rain hood onto a unit. Refer to Figure 6. The outdoor and return air dampers, damper actuator, the linkage and all the controls are factory mounted as part of the economizer option.

All of the hood components, including the filters, the gasketing and the hardware for assembling are located above the top filter racks within the filter section. The outdoor air sensor is in the bag of parts located at the bottom of the return air section.

530.18-N8Y

1.With filter section access panel removed, take out hood components, filters and sensor described above. Remove and discard outdoor air opening cover on back unit (Upper right hand corner).

2.Remove the 1/2" knockout (A) in the units rear panel (located to the right side of the outdoor air opening). Insert the two loose wires from inside the unit, into the 1/2" bushing provided. Insert wires and bushing into knockout. Snap bushing into place.

3.Mount the outdoor air sensor to the rear panel, just below the knockout described in Step 2. Secure with two self-drilling screws at dimples (B) provided in the panel.

NOTE: Sensor must be positioned so that the sensing ports are at the top (louvers pointing downward) and terminal connections to the right.

4.Connect the two wires, indicated in Step 2, to the sensor as follows:

∙Wire #73 to terminal (+)

∙Wire #74 to terminal (S)

5.Assemble the LH and RH side plates to the top cover (2 screws each side) to form the hood. Apply gasketing to the flange surface on each side plate. Extend gasketing 1/4" beyond top and bottom of each flange to insure adequate corner sealing. Secure this assembly to the unit back panel (upper right hand corner). First, remove screw (C) on unit top cover. Then slip flange of hood cover in under flange of unit top cover, replace screw (C), engaging hole (E) in hood flange and tighten. Attach the two side plates to the unit panel by using two self-drilling screws for each side plate at dimples (D) provided in the panel.

6.Position fillpiece at bottom of hood, between the two side plates but do not secure at this time. (Slotted openings MUST be downward for drainage). After fillpiece is properly posi- tioned, note where contact is made with the unit panel. Re- move fillpiece and apply gasket material to this area to provide a seal. Reposition fillpiece and secure with 2 screws.

7.Install the two filters into the hood assembly, sliding down along retainers on side plates, into fillpiece at bottom of hood.

 

OUTDOOR AIR

 

 

 

 

OPENING COVER

C

 

 

 

HOOD

 

 

 

FILTER

COVER

 

 

 

COVER

D

 

 

OUTDOOR AIR

E

 

 

 

D

SENSOR

GASKETED

A

D

 

 

FLANGE

 

D

GASKET

 

 

 

B

 

 

 

 

 

 

L. H. SIDE

PLATE

FILTER SECTION

 

GASKETED

ACCESS PANEL

 

FLANGE

 

 

FILTERS

R. H.

SIDE DUCT

APPLICATION SHOWN

 

SIDE

 

 

 

PLATE

 

FILLPIECE

FIG. 6 - ECONOMIZER RAIN HOOD ASSEMBLY (OPTION)

Unitary Products Group

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Contents Sunline Installation InstructionSingle Package AIR Conditioners Table of Contents Installation Condensate Drain Service AccessPower and Control Wiring FiltersGAS Piping Disconnect Switch Bracket for UnitsWith Optional BELT-DRIVE Blower Pipe SizingNever USE a Flame External SHUT-OFFGAS Connection Propane UNITS, Tanks and PipingOptional Economizer Rain Hood Vent and Combustion AIR HoodsEconomizer1 Bottom Duct Connections1 10001600 1800 2200 2400 2600Center of Gravity Physical DataUnit AIR Flow TON Side Duct Connections @ 230/460/575 VoltsSize CFM RPM 1660 1560 10771095 1630 1650Amps Superheat Charging Table for ModelBlower Circuit Size Breaker Supply Motor Ampacity MIN MAX RLA LRA FLA34.2 35.4 14.5 16.6 18.7 20.8 18.1 20.1 22.2 24.328.4 31.7Knockout Hole Size Used for Utilities Entry DataHeating Sequence of Operation OperationCooling System Cooling Sequence of OperationSTART-UP Burner Instructions Burner AIR Shutter AdjustmentSupply AIR Blower and Temperature Rise Adjustments Pilot CheckoutGAS Rate Cubic Feet PER Hour Checking GAS InputNatural GAS Cleaning Flue Passages and Heating Elements MaintenanceTroubleshooting Normal MaintenanceModels 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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