Carrier CRECOMZR077A00 Installation Instructions Manual

Also see for CRECOMZR077A00: Installation instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53500253-01 Printed in U.S.A. Form No. IIK-CRECOMZR77-04 Pg 1 10-23 Replaces: IIK-CRECOMZR77-03Installation InstructionsPart No. CRECOMZR077A00, CRECOMZR079A00,CRECOMZR081A00CONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 4INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5INSTRUCTIONS FOR 48/50LC 07-12 UNITS ONLY . . . . . . . . . . . . . . . . . . . . . . . . 12Installing Optional HH57AC081/1185124 SingleOutside Air Enthalpy Sensor . . . . . . . . . . . . . . . . 15Installing Differential Return Air Sensor . . . . . . . . . 16California’s Title 24 High Temperature LimitSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Demand Controlled Ventilation (DCV) . . . . . . . . . . 17Remote (Downstairs) Monitoring of Controller’s Fault Detection and Diagnostics . . . . . . . . . . . . . 17GENERAL W7220 CONTROLLER AND SENSOR INFORMATION . . . . . . . . . . . . . . . 19W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 19User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Using the Keypad with Menus . . . . . . . . . . . . . . . . . 19Using the Keypad with Settings and Parameters . . 19Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Programming the W2770 Controller . . . . . . . . . . . . 19• SETPOINTS• SYSTEM SETUPCheckout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25SETUP AND CONFIGURATION . . . . . . . . . . . . . . . . 25W7220 Economizer Module Wiring . . . . . . . . . . . . . 25Time-out and Screen Saver . . . . . . . . . . . . . . . . . . . 26START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 26Cooling with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26Heating with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 27Power Loss (Outage or Brownout) . . . . . . . . . . . . . 27Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27• CLEARING ALARMSSAFETY CONSIDERATIONSInstallation of this accessory can be hazardous due to systempressures, electrical components, and equipment location (such asa roof or elevated structure). Only trained, qualified installers andservice technicians should install, start-up, and service thisequipment.When installing this accessory, observe precautions in theliterature, labels attached to the equipment, and any other safetyprecautions that apply:• Follow all safety codes• Wear safety glasses and work gloves• Use care in handling and installing this accessoryIt is important to recognize safety information. This is the safety-alert symbol: . When you see this symbol on the unit and ininstructions or manuals, be alert to the potential for personalinjury.Understand the signal words DANGER, WARNING, CAUTION,and NOTE. These words are used with the safety-alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION is usedto identify unsafe practices, which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability,or operation.WARNINGELECTRIC SHOCK HAZARDFailure to follow this warning could result in personal injury,property damage, or death.Before performing service or maintenance operations on unit,always turn off main power switch to unit and install lock(s)and lockout tag(s). Unit may have more than one powerswitch. Ensure electrical service to rooftop unit agrees withvoltage and amperage listed on the unit rating plate.If any wiring changes are required, first be sure to removepower from the economizer module before starting work. Payparticular attention to verifying the power connection (24 vac).CAUTIONPERSONAL INJURY HAZARDFailure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use care andwear appropriate protective clothing, safety glasses and gloveswhen handling parts and servicing air conditioning equipment.CAUTIONPERSONAL INJURY HAZARDFailure to follow this caution can result in personal injury anddamage to the unit.Cover the duct opening as a precaution so objects cannot fallinto the return duct opening. Be sure to remove the cover wheninstallation is complete.Small Rooftop ProductsSelect 3 to 15 Tons(48/50LC 14 Not Included)Horizontal EconoMi$er X Accessory