GE 2800 manual Central Desk Control, CDC Terminal Location and Typical Wiring

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Central Desk Control

Some installations may want to govern the ability of the unit to operate from a control device remote to the unit or even remote to the room in which the unit is located. The general term given to systems such as this is Central Desk Control. The most common installation of this type of system is a switch mounted at the registration desk and, upon guest check-in, a button is pushed or a switch is moved to allow the air conditioner to operate. Likewise, when the guest checks out the device is put into the “OFF” position so the unit will not operate while the room is vacant.

It is not necessary that the controlling device be located at a central desk to employ a device that will control the unit operation. For instance, in some resort areas devices are connected to sliding glass doors and opening the door causes a contact to close, turning the air conditioner off. This prevents energy being wasted by operating the air conditioner when warm, humid air is entering the room. Some systems operate by motion sensors or heat sensing detectors mounted in the room. These types of systems determine occupant presence in the room and allow the unit to operate; if no one is in the room the device signals the air conditioner to turn off.

Zoneline® models offer Load-Shedding capabilities on units connected to Central Desk Control Systems. For more information on the models’ Load-Shedding Feature, see page 10.

There is a wide variety of devices available, each with its own benefits and constraints. While GE does not offer components that are external to the unit for a Central Desk Control (CDC) system, GE Zonelines are compatible with most CDC and Energy Management systems. Zonelines provide a 24 VAC circuit that powers the Central Desk Control system and no external power is needed.

All Zoneline 2800, 3800, and 5800 Series units are compatible with simple on/off 2-wire Central Desk Control systems. Consult with the provider of other energy management systems to be sure they are compatible with the GE Zoneline. Zonelines have standard connectors factory-installed to provide a CDC interface that permits the unit to be connected to most of the energy management systems. The devices connected to the Zoneline units require no power supply or transformers external to the unit.

Important CDC Comments (all series applicable)

1.When the switching device closes the circuit of the CDC conductors, the unit operation stops.

2.Do not use a common buss (at the unit or at the switch panel) in the wiring. Both wires comprising the circuit must connect to the unit connectors and to the controlling switch. Running one wire from one unit to another unit is common bussing and may damage internal components or cause erratic operation of the system.

3.A 24-volt transformer is contained within the Zoneline. No external voltage may be applied to the unit through the CDC terminals. (Voltage on the CDC conductors is 24 volts AC.)

4.Recommended wire size must be followed as a minimum requirement.

Wire Size #AWG

Maximum Allowable Length

#22

600 Ft.

#20

900 Ft.

#18

1500 Ft.

#16

2000 Ft.

Freeze Sentinel™ remains operational when the unit is connected to a CDC system. Even if the unit is turned “OFF” at the central location, if the sensor at the unit detects the low temperature, the electric resistance heaters and the fan will automatically turn on.

Connecting the Zoneline to a CDC system does not eliminate the ability to connect the unit to a remote thermostat. Once the circuit is “opened,” and control of the unit removed from the CDC system, the selected controls - either the unit mounted control or the remote thermostat - govern the operation of the unit.

Please see page 57 for installation recommendations for the Central Desk Control wiring.

CDC Terminal Location and Typical Wiring

See page 15 for location of CDC terminals on unit.

Example of Common Bussing

 

NOT PERMITTED

Unit #1

Unit #2

Unit #3

INCORRECT Common Bussing

 

Normally Open

 

 

Switch -

 

 

Unit Operational

 

CDC Terminals

 

 

on Zoneline

 

 

Typical Wiring

 

(All Wiring Shown Is Field Supplied)

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Contents GE Zoneline packaged terminal air conditioners ALL Units Require Power Connection KIT Quick ReferenceExample Power Connection KitsZoneline Chassis Nomenclature Comparison of DRY AIR 25 Dehumidification Deluxe Dry Air 25 ModelsNewest Innovation from GE Cooling With Resistance HeatTable of Contents Introduction Chassis Room Cabinet Optional Accessories of the Zoneline SystemZoneline System Wall Case5800 Zoneline Features2800 .2Features and Benefits Compressor Restart Delay Fan-Only Setting HIGH/LOWFan-Cycle Switch SmartFan Electronic Temperature LimitingConcealed Manual Vent Control Easy Clean Air Discharge AreaUp-Front Air Filters Corrosion Protection OptionalHeating Temperature Limits Auxiliary Control SwitchesCooling Temperature Limits Series Switches Description Left SwitchesSeries models only Heat Sentinel Diagnostics Switch Up resistance heat onlyImportant CDC Comments all series applicable CDC Terminal Location and Typical WiringCentral Desk Control Resistance Heat Models Field Wiring TerminalRemote Thermostat Control RAK806 Universal Control Cover Label24V AC Feature Heat Pump Electric HeatHeat Pump Models Compressor Heater Common GroundField-Supplied Relay Specifications For Use With Mechanical 4-Wire Systems OnlyRemote Control Low Voltage Wiring Relay DesignationHeat Pumps and Energy Savings Balance PointHeat pump defrost Zoneline 3800 and 5800 Series Heat Pump Operation Zoneline 3800 and 5800 SeriesZoneline Heat Pump Heat Source Logic Heat pump condensateApplication Comments Air DistributionRAB71A Wall Case DimensionsWall Case with Chassis Installed RAB77 Wall CaseChoice of wall cases is available for the Zoneline Wall CaseSub-Base Wall Case Installation Data GeneralMasonry Wall Construction Architectural Window Louver InstallationWindow, Curtain and Panel Wall Construction Brick, Frame, Stucco Shingle ConstructionPreparation of the Wall Case for All Types of Construction Case AnglesBrick Veneer and Frame Construction Framing for Wall CaseFastening Wall Case Frame and Brick Veneer Installation Cord set connected Wall Section Detailed Side View22-1/4 Four sides 22-1/4 Where it joinsGasket Caulk around Perimeter Wall case all 22-3/842-1/8 Power supplyAll four sides where it 27-1/4 13-1/813-3/4 + D 4 ± 1/4RAB71/77 Ge.com TOP View RAK204 Series SUB-BASE Installation and Electrical Data RAB71/77 Wall CaseCondensate Disposal Systems Wall Case with RAD10 Drain KIT External Drain. See page 36 for internal drainInternal Drain. See page 35 for external drain Replacements of Existing Ducted Units Ducted InstallationsNew Ducted Installations Ducted Application ConsiderationsRAK601 Ducted Application AZ2800/3800 SeriesRAK6052 High WideDucted Detailed Side Views AZ2800/3800 Series Exterior Grilles Outdoor GrilleExterior Architectural Treatments Special Outdoor Grilles 230/208-Volt Permanently Connected Units Or 277-Volt Unit Installation Permanently Connected Units230/208-Volt Line-Cord Connected Units 230/208 Volt Sub-Base and Direct Connected UnitsEssential Elements Ordering Overview Electrical Wiring Information 2800/3800/5800 SeriesReplacement of Existing Chassis Volt Units Maximum Connected Load230/208-Volt Line Cord Connected Units Total Capacity Btuh Btuh at 80º F D.B. 67º F W.B Cooling Performance DataHeat Pump Performance Data 93.00 Indoor Ambient DB Temperature F 100Latent System Capacity Installed unit capacity Btuh Watts/KW Formula for Calculating Operating Costs Using Above DataOutdoor Design Temperature Difference Normal Yearly Operating DataPage Ge.com Typical 5800 Series Schematic Diagram Suggested Bid Form Specifications Suggested Bid Form Specifications Suggested Bid Form Specifications Receptacles/Sub-Bases Premium Line 5800 SeriesSpecifications Complete Accessory List RAB71AGeneral Installation Suggestions Replacement Installations Zoneline warrantyDucted Installation Comments New InstallationsWarm Gray Beige Maple Bittersweet Chocolate Alphabetical IndexExterior Grille Color Samples Century of quality and innovation GE Company Pub. No -S087 PC48947
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