Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions

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Carrier 58CVA Installation, Start-up, Operating And Service And Maintenance Instructions Manual pdf 29 page image

In the U.S.: Per the NFGC, any listed power venter may be used,when approved by the authority having jurisdiction.In Canada: Only power venters approved by the appliancemanufacturer and where allowed by the authority having jurisdic-tion may be used for sidewall venting.The only approved power venter is the Field Controls SWG-4Dand SWG-5D sidewall power venter. Select the power venter tomatch the btuh input of the appliance being vented. Follow allmanufacturer’s installation requirements for venting and termina-tion included with the power venter.START-UP, ADJUSTMENT, AND SAFETY CHECKStep 1—GeneralThis furnace is equipped with manual reset limit switches inthe gas control area. The switches open and shut off power tothe gas valve, if a flame rollout or overheating conditionoccurs in the gas control area. DO NOT bypass the switches.Correct problem and reset the switches.1. Maintain 115-v wiring and ground. Improper polarity willresult in rapid flashing LED and no furnace operation.2. Make thermostat wire connections at the 24-v terminal blockon the furnace control. Failure to make proper connectionswill result in improper operation. (See Fig. 22.)3. Gas supply pressure to the furnace must be greater than 4.5-in.wc (0.16 psig ) but not exceed 14-in. wc (0.5 psig ).Personal injury can result form sharp metal edges, etc. Becareful when removing parts. Gloves and safety glassesshould be worn when servicing equipment.4. Check all manual-reset switch for continuity.5. Replace blower compartment door. Door must be in place tooperate furnace.6. Setup switch descriptionsThe variable speed furnace control has DIP switches to selectthermostat staging, blower off delay timings, air flow selectionand other operational or service related functions. See Fig. 32,51 and Table 6.Step 2—Start-Up ProceduresNever purge a line into a combustion chamber. Never usematches, candles, flame, or other sources of ignition for thepurpose of checking leakage. Use a soap-and-water solutionto check for leakage. Failure to follow this warning can causefire, explosion, personal injury, or death.1. Purge gas lines after all connections have been made.2. Check gas lines for leaks.Blower access door switch opens 115-v power to control. Nocomponent operation can occur unless switch is closed.Caution must be taken when manually closing this switch forservice purposes. Failure to follow this warning could resultin electrical shock, personal injury, or death.3. To Begin Component Self-Test:Remove Blower Access Door. Disconnect the thermostat Rlead from from furnace control board. Manually close blowerdoor switch. Turn Setup DIP switch SW1-6 ON. See Fig. 32,51 and Table 6.NOTE: The furnace control allows all components, except the gasvalve, to be run for short period of time. This feature helpsdiagnose a system problem in case of a component failure.Component test feature will not operate if any thermostat signal ispresent at the control.Component test sequence is as follows for variable speed furnace:Refer to service label attached to furnace or See Fig. 50.a. Inducer motor starts on high-speed and continues to rununtil Step 4 of component test sequence.b. Hot surface igniter is energized for 15 sec., then off.c. Blower motor operates for 15 sec.d. Inducer motor goes to low-speed for 10 sec., then stops.e. After component test is completed, one or more statuscodes (11, 25, or 41) will flash. See component test sectionof service label (Fig. 50) in furnace for explanation of faultcodes.Table 6—Furnace Setup Switch DescriptionSETUPSWITCH NO.SWITCHNAMENORMALPOSITIONDESCRIPTIONOF USESW1-1 Status Code Recovery OFF Turn ON to retrieve up to 7 stored status codes for troubleshootingassistance when R thermostat lead is disconnected.SW1-2 Adaptive Heat Mode OFFAllows 2-stage operation with a single stage thermostat.Turn ON when using 2 stage thermostat to allow Low Heat opera-tion when R to W/W1 closes and High Heat operation when R toW/W1 and W2 close.SW1-3 Low HeatRise Adjust OFFTurn ON to increase Low Heat airflow by 18 percent. This compen-sates for increased return air temperature caused with bypass hu-midifier.SW1-4 Comfort/Efficiency Adjustment ON Turn ON to decrease Low Heat airflow by 16 percent and High Heatairflow 10 percent for maximum comfort.SW1-5 CFM per ton adjust OFF Turn ON for 400 CFM per ton. Turn OFF for 350 CFM per ton.SW1-6 Component Self-Test OFFTurn ON to initiate Component Self-Test for troubleshooting assis-tance when R thermostat lead is disconnected.Turn OFF when Self-Test is completed.SW1-7 Blower OFF delay ON or OFF Control blower Off Delay time. Used in conjunction with SW1-8. SeeTable 8.SW1-8 Blower OFF delay ON or OFF Control blower Off Delay time. Used in conjunction with SW1-7. SeeTable 8.28→