GE 5500 manual Central Desk Control

Page 14

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.

All Zoneline 2500, 3500, and 5500 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 units. Zoneline units have standard connectors factory installed to provide a CDC interface that permits the unit to be connected to most 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 units. 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 SentinelTM 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 fan will automatically turn on.

Connecting the Zoneline unit 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 12 and 13 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 Architects and Engineers Design Data Manual 3500 Series Control Panel Series Heat Pump with Backup Resistance HeatQuick Reference Series Cooling with Electric HeatSeries Control Panel EER COPCooling With Resistance Heat Newest Innovation from GETable of Contents Important NoticeIntroduction Deluxe Series shown Optional Accessories of the Zoneline SystemComponents of the Zoneline System Zoneline Features Model Series UPCFeatures 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 3500 SeriesSeries DiagnosCentral Desk Control Remote Thermostat Control Resistance Heat ModelsRAK806 Universal Control Cover Label Heat Pump ModelsFeature Series See RAK806 Universal Control cover Label onR1, R2, and R3 For Use With Mechanical 4-Wire Systems OnlyRemote Control Low Voltage Wiring Special order, 100 piece minimum orderHeat pump condensate Heat Pumps and Energy SavingsBalance Point Zoneline 5500 Series Heat Source Logic Heat pump defrost Zoneline 5500 SeriesHeat Pump Operation Zoneline 5500 Series Recommendation Application CommentsAir Distribution High Wall Mount For unitsDimensions RAK204 Wall CaseSub-Base General Wall Case Installation DataWindow, Curtain and Panel Wall Construction Brick, Frame, Stucco and Shingle Construction Installation of Wall Case in Wall OpeningMasonry Wall Construction Preparation of the Wall Case for All Types of ConstructionFraming for Wall Case Fastening Wall CaseWall Case Wall Section Detailed Side ViewRoom Cabinet Room Wall Case CabinetWall Case Receptacle RoomCabinet Wall Case By OthersWall Case Installation Cord SET Connected CaulkCorner and lap joints be additionally sealed Page Shown with Access Covers Removed Alternates Small Recommend 2 to Adjustable CaulkHoles by Installer TOP ViewType B Screw Green Ground RAK204 Series SUB-BASE Installation and Electrical DataChaseway Option Metal Case Screw Clip Type D Type a To Secure Side ChannelsCondensate Disposal Systems Cooling CondensateRear Grille Typical InstallationWall Case with RAD10 Drain KIT Wall Case Room CabinetUSE Type a Screws for Both RAB71 and RAB77 NUT Molded Case RAB77 only DetailGasket Cabinet Bottom Tube Cover Plate Replacements of Existing Ducted Units Ducted InstallationsNew Ducted Installations Ducted Application ConsiderationsDucted Application AZ2500/3500 Series Duct Adapter Extension has 1/2 InsulationSub-Base Installation Ducted Detailed Side Views AZ2500/3500 SeriesExterior Grilles Sample Calculations230/208 Volt Unit Installation Permanent Connected Units Power Connection For Deluxe Series 2500230/208 Volt Unit Installation Line Cord Connected Units 265 or 277 Volt Unit Installation Permanent Connected UnitsPower Connection Kits For Premium Series 230/208 Volt InstallationsReplacement of Existing Chassis Maximum Connected Load For Deluxe Series 2500 Cooling Performance Data Heat Pump Performance DataLatent System Capacity Formula for Calculating Operating Costs Using Above Data Normal Yearly Operating DataDrive Board Unit Typical 2500 Series Wiring DiagramTypical 2500 Series Schematic Diagram Board Unit Typical 3500 Series Wiring DiagramTypical 3500 Series Schematic Diagram Typical 5500 Series Wiring Diagram Typical 5500 Series Schematic DiagramSuggested Bid Form Specifications Page Alternate specification for molded wall case Deluxe Line Dry Air 25 & 3500 Series Receptacles/Sub-Bases Complete Accessory List Kit Number Description For Additional Information Refer toGeneral Installation Suggestions Electrical Wiring InstallationNew Installations Replacement InstallationsAlphabetical Index CategoryZoneline

5500 specifications

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