Carrier 50TCQD14 Installation Instructions Manual

Also see for 50TCQD: Installation instructions

Contents

41S The Y2 In call will be satisfied with the damper 100%open and fan on high speed and the call will turn offORS If the call for additional cooling in the space has notbeen satisfied then the first stage of mechanical coolingwill be enabled through Y1 Out or Y2 Out.CheckoutInspect all wiring connections at the economizer module’sterminals, and verify compliance with the installationwiring diagrams.For checkout, review the Status of each configuredparameter and perform the Checkout tests.NOTE: See “Interface Overview” on page 29 forinformation about menu navigation and use of the keypad.ELECTRICAL SHOCK HAZARDFailure to follow this warning could cause personalinjury, death or property damage.Before performing service or maintenance operationson unit, always turn off main power switch to unit andinstall lock(s) and lockout tag(s). Unit may have morethan one power switch. Ensure electrical service torooftop unit agrees with voltage an amperage listed onthe unit rating plate.If any wiring changes are required, first be sure toremove power from the economizer module beforestarting work. Pay particular attention to verifying thepower connection (24 Vac).! WARNINGPower Up —After the W7220 module is mounted and wired, applypower.Initial Menu Display —On initial start up, Honeywell displays on the first lineand Economizer W7220 on the second line. After a briefpause, the revision of the software appears on the first lineand the second line will be blank.Power Loss (Outage or Brownout) —All setpoints and advanced settings are restored* after anypower loss or interruption.Status —Use the Status menu (see Table 11) to check the parametervalues for the various devices and sensors configured.NOTE: See “Interface Overview” on page 29 forinformation about menu navigation and use of the keypad.Checkout Tests —Use the Checkout menu (on page 34) to test the damperoperation and any configured outputs. Only items that areconfigured are shown in the Checkout menu.* All settings are stored in non--- volatile flash memory.NOTE: See “Interface Overview” on page 29 forinformation about menu navigation and use of the keypad.To perform a Checkout test:1. Scroll to the desired test in the Checkout menu usingthe the and buttons.2. Press the button to select the item.3. RUN? appears.4. Press the button to start the test.5. The unit pauses and then displays IN PROGRESS.6. When the test is complete, DONE appears.7. When all desired parameters have been tested, pressthe (Menu up) button to end the test.The Checkout tests can all be performed at the time ofinstallation or at any time during the operation of the systemas a test that the system is operable.EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage.Be sure to allow enough time for compressor startupand shutdown between checkout tests so that you donot short--cycle the compressors.CAUTION!TroubleshootingAlarms —The economizer module provides alarm messages thatdisplay on the 2--line LCD.NOTE: Upon power up, the module waits 60 minutesbefore checking for alarms. This allows time for all theconfigured devices (e.g. sensors, actuator) to becomeoperational. The exception is the SAT sensor which willalarm immediately.If one or more alarms are present and there has been nokeypad activity for at least 5 minutes, the Alarms menudisplays and cycles through the active alarms.You can also navigate to the Alarms menu at any time.Clearing Alarms —Once the alarm has been identified and the cause has beenremoved (e.g. replaced faulty sensor), the alarm can becleared from the display.To clear an alarm, perform the following:1. Navigate to the desired alarm.2. Press the button.3. ERASE? displays.4. Press the button.5. ALARM ERASED displays.6. Press the (Menu up/Exit) button to complete theaction and return to the previous menu.NOTE: If the alarm still exists after you clear it, it isredisplayed within 5 seconds.