Carrier 48LC Series Controls, Start-up, Operation And Troubleshooting

Also see for 48LC 05: Controls, Start-Up, Operation and Troubleshooting Service and maintenance instructions Service and maintenance instructions

Contents

Carrier 48LC Series Controls, Start-up, Operation And Troubleshooting Manual pdf 9 page image

9MANUAL GAS SHUT OFF VALVE(FIELD SUPPLIED)SUPPLY GASPRESSURE TAP(1/8˝ NPT PLUG)GASSUPPLYSEDIMENT TRAPUNIONTOUNITa48--- 9382Fig. 9 -- Field Gas Piping3. Connect a pressure gauge to the manifold pressure tap onthe burner assembly located inside the unit.4. Open the field-supplied manual gas shut off valve. EnterService Test mode by setting TEST MODE to “ON” using theSystemVut controller interface. Use the Service Test featureto set HEAT 1 TEST to ON (first stage of heat) using theSystemVu controller interface.5. After the unit has run for several minutes, verify the supplygas pressure is adequate per the base unit installation in-structions. If not, adjust accordingly.NOTE: Supply gas pressure must not exceed 13.0--in. wg.6. Set HEAT 1 TEST to OFF using the SystemVu controllerinterface.7. Exit Service Test mode by setting TEST MODE to “OFF”using the SystemVu controller interface.CONTROLS QUICK SET--UPThe following information will provide a quick guide to setting upand configuring the 48/50LC series units with SystemVu controls.Unit controls are pre-configured at the factory for factory-installedoptions. Field-installed accessories will require configuration atstart-up. Initial System Startup is recommended for initial start--up.Additionally, specific job requirements may require changes to defaultconfiguration values. See Appendix A and other sections of theseinstructions for more details. Refer to the Major System Componentsor accessory installation instructions for specific wiring detail.Control Set Point and Configuration LogDuring start up, accessory installation, and equipment service setpoints and/or configuration changes might have to be made. Whensetting set points or configuration settings, documentation isrecommend. The Control Set Point and Configuration Log startingon page 153 should be filled out and left with the unit at all times,a copy should also be provided to the equipment owner. A USBjump drive can be used to back up the unit’s configurations. Referto the USB Operation section for details.Initial StartupInitial Startup refers to the first time this particular unit has a startupperformed. The SystemVu controller will continually display theInitial Startup prompt until it is completed. To complete the initialstartup you must complete the Quick Setup, Network Setup, andthe System Auto Test.Quick SetupThis a list of common adjusted configurations set during startup.These are common accessories, and control means. Set the list inTable 3. After setting these per the specific unit set the QUICKSET CHKLIST point to done.Table 3 – Quick Setup Menu ItemsSystemVu™ Display Expanded Name Range DefaultQUICK SETUP CONFIG QUICK SETUPCONFIG MENUTIME Clock Hour and Minute HH:MMDATE Current Date MM/DD/YYYYSTARTUP DELAY Unit Startup Delay 10 to 600 30UNIT CONTROL TYPE Unit Control Type 0=TSTAT,1=SPACE SEN,2=RAT SEN0THERMOSTAT TYPE Thermostat HardwareType0=CONV 2C2H,1=DIGI 2C2H,2=CONV 3C2H,3=DIGI 3C2H2DIRTY FILTER TIME Change Filter Timer 0 to 9999 600VENT IDF SPEED Ventilation Only IDFSpeed0 to 100 67*HEATING STAG QTY Number of HeatingStages1 to 2 2*ECON INSTALLED? Economizer Installed? No/Yes No*FREECOOL MAX OAT Free Cooling Max OAT 0 to 90 65FIRE SHUTDOWN SW Fire Shutdown Switch 0=No Switch,1=N/Open2=N/Close0*QUICK SET CHKLIST QUICK SETUPCHECKLIST0=Undone,1=View,2=Done0* These defaults change based on the Unit model number.Network SetupThis is a shortcut to the Network Settings submenu. In this submenu are the specific network settings required to get the networkpiece up and running. After setting these per the specific unit setthe NETWORK CHKLIST point to done.System Auto TestTurning this to Start will run enable test mode and execute the SystemAuto Test. After the auto test has completed, set this to done.Thermostat ControlWire accessory thermostat to the corresponding R, Y1, Y2, Y3,W1, W2, and G terminals on the Main Base board.The Unit Control Type configuration, (UNIT CONTROL TYPE)default value is for thermostat (0) so there is no need to configurethis item.The Thermostat Hardware Type, (THERMOSTAT TYPE) selectsthe unit response to the thermostat inputs above.NOTE: May not be compatible with heat anticipator thermostats.Space Temperature Sensor Control -- Direct Wired(T--55 or T--56 or T--59)Wire accessory space temperature sensor(s) to the T-55 terminalson the field connection terminal board located at the unit controlbox. Refer to Space Mounted Sensors section (page 59) foradditional information.The Unit Control Type configuration, (UNIT CONTROL TYPE)must be set to Space Sensor (1).Space Humidistat ControlFor units with the factory--installed Humidi--MiZerR systemoption, the humidistat input is provided with quick connects. TheSpace Humidity Switch configuration, SETTINGS  UNITCONFIGURATIONS  SWITCH INPUTS CONFIGS HUMSTAT CHANNEL identifies the normally open or normallyclosed status of this input at HIGH humidity.Relative Humidity Sensor ControlFor units with the factory--installed Humidi--MiZer system option,the humidity sensor input is provided with quick connects. Thesensor can be used instead of a humidistat. The RH Sensorconfiguration, SETTINGS  UNIT CONFIGURATIONS ANALOG INPUTS CONFIGS  SPRH SENSOR CHANNEL,identifies the point on the MBB (Main Base board) or the IOB(Input Output board) the sensor was wired into.