Carrier CRECOMZR077A00 Installation Instructions Manual

Also see for CRECOMZR077A00: Installation instructions

Contents

23Legend and Notes for Table 11.NOTES:1. Table 11 illustrates the complete hierarchy. Menu parameters maybe different depending on configuration. For example, none of theDCV parameters appear for a system that does not have a DCV(CO 2 ) sensor.2. When values are displayed, pressing and holding the ▲ or ▼ but-ton causes the display to automatically increment.3. ERV Operation: When in Cooling mode AND the conditions areNOT OK for economizing - the ERV terminal will be energized. Inthe Heating mode the ERV terminal will be energized when the OAis below the ERV OAT set point in the set point menu.Checkout TestsUse the Checkout menu (see Table 11) to test the damper oper-ation and any configured outputs. Only items that are config-ured are shown in the Checkout menu.NOTE: See User Interface for information about menu navigationand use of the keypad.To perform a Checkout test:1. Scroll to the desired test in the Checkout menu using 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, press the(Menu up) button to end the test.Checkout test can be performed at any time during the opera-tion of the system as a test that the system is operable.SETUP AND CONFIGURATIONW7220 Economizer Module WiringUse Fig. 38 and Tables 12 and 13 to locate the wiring terminalsfor the economizer module.NOTE: The four terminal blocks are removable. Slide out eachterminal block, wire it, and then slide it back into place.Fig. 38 — W7220 Economizer Module TerminalConnection LabelsLEGENDn/a — Not applicableLCD — Liquid Crystal DisplayMAT — Mixed Air TemperatureOAT — Outdoor Air TemperatureOCC — OccupiedRAT — Return Air TemperatureRTU — Rooftop UnitCAUTIONEQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in damage toequipment.Be sure to allow enough time for compressor startup andshutdown between checkout tests. Do not short-cycle thecompressors.Table 12 — Economizer Module — Left HandTerminal BlocksLABEL TYPE DESCRIPTIONTop Left Terminal BlockMATMAT20k NTCand COMMixed Air Temperature Sensor(Polarity insensitive connections)OATOAT20k NTCand COMOutdoor Air Temperature Sensor(Polarity insensitive connection)S-BUSS-BUSS-BUS(Sylk Bus)Enthalpy Control Sensor(Polarity insensitive connection)Bottom Left Terminal BlockIAQ 2-10 2-10 vdc Air Quality Sensor Input(e.g. CO 2 sensor)IAQ COM COM Air Quality Sensor CommonIAQ 24V 24 vac Air Quality Sensor 24 vac SourceACT 2-10 2-10 vdc Damper Actuator Output (2-10 vdc)ACT COM COM Damper Actuator Output CommonACT 24V 24 vac Damper Actuator 24 vac SourceNAAUX2-OCCE-GNDEXH1AUX1-OY2-Y1-Y2-OY1-OCR50048848-002Rev. ANAA2OCCEXA1Y2IY2OY1IY1OCRCert ProductCalifornia Title 24, Part 6HJW10www.energy.ca.govMATMATOATOATS-BUSS-BUSIAQ 2-10IAQ COMIAQ 24VACT 2-10ACT COMACT 24VMAMAOAOASBSBSBSBSBSBVCRVCRNA50040839-001Rev. G