Carrier 58TMA Installation, Start-up, And Operating Instructions Manual

Also see for 58TMA: Install and operation instructions Service and maintenance instructions User's information manual User's information manual

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Carrier 58TMA Installation, Start-up, And Operating Instructions Manual Manual pdf 11 page image

the low-gas heat on time (from 0 to 16 minutes) which ispermitted before switching to high-gas heat.If the power is interrupted, the stored history is erased, and thecontrol CPU selects low-gas heat for up to 16 minutes andthen switches to high-gas heat as long as the thermostatcontinues to "call for heat". Subsequent selection is based onstored history of the thermostat cycle times.When the wall thermostat "calls for heat," the R-W1 circuitcloses. The furnace control performs a self-check, verifies thelow-heat and high-heat pressure switch contacts LPS and HPSare open, and starts the inducer motor IDM in low speed orhigh speed as appropriate.a. Inducer prepurge period—As the inducer motor IDMcomes up to low speed or high speed, the low-heat pressureswitch contacts LPS (or LPS and HPS) close to begin a15-sec prepurge period.b. Ignitor warm-up—At the end of the prepurge period, thehot surface ignitor HSI is energized for a 17-sec ignitorwarm-up period.c. Trial-for-ignition sequence—When the ignitor warm-upperiod is completed, the main gas valve relay contactsMGVR-1 and -2 close to energize the low-heat gas valvesolenoid GV, the gas valve opens, and 24-v power issupplied for a field-installed humidifier at terminals HUMand Com. The low-heat gas valve solenoid GV permits gasflow to the burners where it is ignited. After 5 sec, theignitor HSI is de-energized, and a 2-sec flame-provingperiod begins.If the furnace control CPU selects high-gas-heat operation,the high-heat gas valve solenoid GV is also energized afterthe normally closed high-heat pressure switch relay HPSRcloses and after the inducer motor IDM goes to high speedand provides sufficient pressure to close the high-heatpressure switch HPS. HPSR is open while the furnace ispowered in standby mode. If the high-heat pressure switchHPS fails to close and the low-heat pressure switch LPScloses, the furnace operates at low-heat gas flow rate untilthe high-heat pressure switch closes.Fig. 15—Unit Wiring DiagramA94232FUSED DISCONNECTSWITCH (WHEN REQ'D)NOTE #1JBWHTBLKGRNGRNFU2COMPONENT TESTTo initiate the component test sequence with no thermostat inputs and with all inducer Post-Purge andBlower-Off Delay periods completed, short the 'TWIN/TEST' terminal to the 'COM' terminal for about twoseconds. The control will turn ON the inducer motor Low-Speed, inducer motor High-Speed, HSI,blower motor Low-Gas-Heat Speed, blower motor High-Gas-Heat Speed, and blower motor High-CoolSpeed for 7-15 seconds each. Neither the gas valve nor the humidifier will be turned ON.ALS1ALS2BHI/LORBHT/CLRBLWMBLWRCAPCPUDSSEAC-1EAC-2FRS1FRS2FSEFU1FU2GVHPSHPSRHSIHSIRHUMIDMIDRIHI/LORILKJBLEDLGPSLPSLSMGVRLEGENDAUXILIARY LIMIT SWITCH, OVERTEMP.–MANUAL RESET, SPST-(N.C.)AUXILIARY LIMIT SWITCH, OVERTEMP.–AUTO. RESET, SPST-(N.C.)BLOWER MOTOR SPEED CHANGE RELAY, SPDTBLOWER MOTOR SPEED CHANGE RELAY, SPDTBLOWER MOTOR, 4-SPEED, PERMANENT-SPLIT-CAPACITORBLOWER MOTOR RELAY, SPST-(N.O.)CAPACITORMICROPROCESSOR AND CIRCUITRYDRAFT SAFEGUARD SWITCHELECTRONIC AIR CLEANER CONNECTION (115 VAC 1 AMP MAX.)ELECTRONIC AIR CLEANER CONNECTION (COMMON)FLAME ROLLOUT SWITCH OVERTEMP.–MANUAL RESET, SPST-(N.C.)FLAME ROLLOUT SWITCH OVERTEMP.–MANUAL RESET, SPST-(N.C.)FLAME-PROVING SENSOR ELECTRODEFUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLEDFUSE, FIELD INSTALLEDGAS VALVE-REDUNDANT LOW-HEAT OPERATORS, 2-STAGEHIGH-HEAT PRESSURE SWITCH, SPST-(N.O.)HIGH-HEAT PRESSURE SWITCH RELAY, SPST-(N.C.)HOT-SURFACE IGNITOR (115 VAC)HOT-SURFACE IGNITOR RELAY, SPST-(N.O.)24VAC HUMIDIFIER CONNECTION (.5 AMP MAX.)INDUCED DRAFT MOTOR, 2-SPEED, SHADED–POLEINDUCER MOTOR RELAY, SPST-(N.O.)INDUCER MOTOR SPEED CHANGE RELAY, SPDTBLOWER DOOR INTERLOCK SWITCH, SPST-(N.O.)JUNCTION BOXLIGHT-EMITTING DIODE FOR STATUS CODESLOW GAS-PRESSURE SWITCH, SPST-(N.O.)LOW-HEAT PRESSURE SWITCH, SPST-(N.O.)LIMIT SWITCH, OVERTEMPERATURE-AUTO RESET, SPST-(N.O.)MAIN GAS VALVE RELAY, DPST-(N.O.)–1 = VALVE –2 = HUMIDIFIERPL1PL2PL3PL4PL6PL7SW1SW2SW3 & 4TJTRANTWIN/TEST12-CIRCUIT CONNECTOR9-CIRCUIT CONNECTOR3-CIRCUIT IDM CONNECTOR1-CIRCUIT FPS CONNECTOR2-CIRCUIT HSI CONNECTOR2-CIRCUIT LINE/NEUTRAL CONNECTORHIGH-HEAT-ONLY SWITCH, SPST-(MANUAL) *LOW-HEAT-ONLY SWITCH, SPST-(MANUAL) *BLOWER-OFF DELAY SETTING SWITCHES,SPST-(MANUAL) *TWINNING JUMPER, SPDT FOR MASTER ORSLAVE STATUS-(MANUAL CHANGE-OVER)TRANSFORMER-115VAC/24VAC1-CIRCUIT TWINNING BUSS CONNECTOR,ALSO STATUS CODE RECALLJUNCTIONTERMINALCONTROL TERMINALFACTORY POWER WIRING (115VAC)FACTORY CONTROL WIRING (24VAC)FIELD POWER WIRING (115VAC)FIELD CONTROL WIRING (24VAC)CONDUCTOR ON CONTROLFIELD WIRING SCREW TERMINALFIELD GROUNDEQUIPMENT GROUNDFIELD SPLICEPLUG RECEPTICLE1.2.3.4.5.6.7.8.9.10.11.12.13.14.USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH ANDTHE UNIT.IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED, USETHE SAME OR EQUIVALENT TYPE WIRE.INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL AUTO-RESET THERMAL OVERLOAD SWITCHES.BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS.SEE INSTALLATION INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEEDSELECTION.REPLACE ONLY WITH A 3-AMP FUSE.AUXILIARY LIMIT SWITCHES (ALS1 & 2) USED ON DOWNFLOW MODELSONLY.THIS WIRE MUST BE CONNECTED TO FURNACE SHEET METAL FORCONTROL TO PROVE FLAME.FACTORY CONNECTED WHEN LGPS NOT USED.SYMBOLS ARE AN ELECTRICAL REPRESENTATION ONLY.BLOWER-ON DELAY: GAS HEATING 45 SECONDS, COOLING/HEAT PUMP 2SECONDS.COOLING/HEAT PUMP BLOWER-OFF DELAY IS 90 SECONDS.IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUC-CESSFUL TRIALS-FOR-IGNITION. CONTROL WILL AUTOMATICALLY RESETAFTER THREE HOURS.CONTROL MUST BE GROUNDED AT PIN 10 OF 12-PIN CONNECTOR.NA - NOT APPLICABLENOTES:320854-401 REV. DLS FRS2 NOTE #8LPSCONNECTION DIAGRAMREDREDREDFRS1(WHEN USED)HEATSET-UPSWITCHNORMHI HTLO HTSWITCH1 2ONOFFONOFFONOFFONOFFSWITCH3 4BLOWER-OFFDELAY(SEC.)90 SEC135 SEC180 SEC225 SEC 2-STAGEFURNACECONTROLBLOWER-OFF DELAY1 42 3 BLOWER-OFF DELAYLOW-HEAT ONLYHIGH-HEAT ONLYONOFFW2 Com24VW/W1Y/Y2R G HUMTWINTESTLED123TJMSREDREDORNYELREDORN ORNYELNOTE #8DSS LGPSALS1(WHEN USED)NOTE #6ALS2ORNBRNBLUWHTGRN101112P1123789BLKGRYSEC2PR1 PR2L1 L2COMMONHI-COOLHI-GASHEATSEC1LO-GASHEATEAC-2EAC-1PARKFU1PL2YEL(WHEN USED)1 PL4 WHT FSE1 2BLKPL6HSIWHTIDMGRNREDWHTBLK1 2 3 PL3REDBLKWHTBRNGRY BRNHPS HIPMCGRNGRNBLUL1L21 2 WHTBLKILKWHTBLKPL7BLKWHTCAPBRN BRNNOTE #4COMHIMED HIMED LOLOREDBLUWHTBLKYELBLURED BLWMREDBLUWHTBLKTRANSCHEMATIC DIAGRAM(NATURAL GAS & PROPANE)TO 115VAC FIELD DISCONNECT SWITCHEQUIPMENT GROUNDILKL1PL7BLWRHSIR EAC-1 EAC-2BHT/CLRBHI/LOR LO-GAS-HEATPARKHI-COOLCOMMONHI-GAS-HEATLOMED LOMED HIHICOMBLWML2BRNBRNCAPNOTE #4IDRIHI/LORPR1 115VAC24VACTRANPR2SEC1 SEC2FU1NOTE #5 HPSRHSIPL6PL312213394781562LOHICOMIDMN/AN/A122396541107811N/AFRS1(WHEN USED)FRS2LSMGVR-2HUMRTWINTESTSLAVEMASTERW/W1SW1W2Y/Y2GCOMSW4SW3SW2CPUTWINNINGJUMPERTJMGVR-1PL1N/AN/A PL4FSEM PCNOTE#7HIGVHPSNOTE #8LGPS(WHEN USED)NOTE #8 LPSDSSALS1ALS2GVFACTORYSETTINGPL2GRYNOTE #1***11