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Resumen del manual
15—Heating and Cooling Application Wiring Diagram Step 8—Winterizing A87502 location. When reinstalling igniter, use care to insure all wiring is away from the burners and is not touching the bottom of the sheet metal enclosure. Step 7—Electrical Controls and Wiring NOTE: There may be more than 1 electrical supply to the unit. The electrical ground and polarity for 115-v wiring must be maintained properly. Refer to Fig. 15 for field wiring information and to Fig. 17 for unit wiring information. If the polarity is not correct, the microprocessor control will shut off the gas flow shortly after completion of the ignition trial period. The control system also requires an earth ground for proper operation of the microprocessor. The 24-v circuit contains an automotive-type, 3-amp fuse (FU1) located on the main control board. (See Fig. 16.) Any direct shorts during installation, service or maintenance may cause this fuse to "blow." If fuse replacement is required, use only a fuse of identical size. With power disconnected to the unit, check all electrical connections for tightness. Tighten all screws on electrical connections. If any smokey or burned connections are found, disassemble the connection, clean all parts, strip wire, and reassemble properly and securely. Reconnect electrical power to the unit and observe unit through 1 complete operating cycle. Electrical controls are difficult to check without proper instrumentation; if there are any discrepancies in the operating cycle, contact your dealer and request service. A CAUTION The unit must not be installed, operated, and then turned off and left off in an unoccupied structure during cold weather when the temperature drops to 32° F and below. Freezing condensate left in the furnace will damage the equipment. If the furnace will be off for an extended period of time in a structure where the temperature will drop to 32° F or below, winterize as follows: 1. Mix a solution of equal amounts of ethylene glycol (Prestone II antifreeze/coolant or equivalent) and water. 2. Turn OFF electrical supply to furnace. 3. Remove control access door. 4. Disconnect drain tube from bottom of inducer outlet box/elbow. 5. Insert funnel in drain tube and pour antifreeze/water solution into furnace until it is visible at point where condensate enters open drain. 6. Reconnect drain tube to outlet box/elbow. 7. Replace control access door. ELECTRONIC AIR CLEANER TERMINALS (115 VAC, 1 AMP MAX) -tegSDj 24-VOLT THERMOSTAT _. ... TERMINALS ADJUSTMENT CONTROL HUMIDIFIER TERMINAL (24 VAC, 0.5 AMP MAX) JW9 SELF-TEST PINS Fig. 16—Control Center A91060 7 RED GVR Otpb CPU HUMR HUM-1 (TP YEL 0TP7 W V R C G 0 0 0 0 0 24V ÀC COMMON fi-Qv '—I 0 .5 AMP. MAX. JW9 SELF w ^ ^ ^ Tpsr 90 135 180 225 I® 3 NOTE #7 ST1 ST2 BLOWER OFF DELAY LEGEND ALS BLWR BLWM CAP CPU EAC-1 EAC-2 FR5 FSE • FU1 FU2 GV 6VR HI/LO HSI H5IR HUM-1 HUMR !DM ' 1DR ILK JB JW9 LGPS LS PCB PL1 GROUND SCREW REQUIRED NOTE #1 MANUAL RESET, SPST-CN.C.) AUXILIARY LIMIT SWITCH, OVERTEMP. BLOWER MOTOR RELAY, SPST-(N.O.) BLOWER MOTOR CAPACITOR MICROPROCESSOR AND CIRCUITRY ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1 AMP MAX.) ELECTRONIC AIR CLEANER CONNECTION (COMMON) FLAME ROLLOUT SWITCH FLAME SENSING ELECTRODE FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED FUSE, FIELD INSTALLED GA5 VALVE-REDUNDANT OPERATORS MAIN GAS VALVE RELAY, DPST-(N.O.) BLOWER MOTOR SPEED CHANGE RELAY, DPST-CN.O.) HOT SURFACE 1GNIT0R (115 VAC) HOT SURFACE IGNITOR RELAY, DPST-CN.O.) 24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.) HUMIDIFIER RELAY, DPST-CN.O.) - INDUCED DRAFT MOTOR INDUCED DRAFT RELAY, DPST-CN.O.) BLOWER DOOR INTERLOCK SWITCH, SPST-(N.O.) JUNCTION BOX INDUCER OFF DELAY JUMPER. CUT-15 SEC DELAY, UNCUT -5 SEC DELAY LOW GAS PRESSURE SWITCH, SPST-CN.O.) LIMIT SWITCH, OVERTEMPERATUREi-AUTO RESET, SPST-CN.C.) PRINTED CIRCUIT BOARD 11-CIRCUIT EDGE CONNECTOR CPCB) PL2 2-CIRCUIT HSI CONNECTOR PL3 2-CIRCUIT I DM CONNECTOR PL4 1-CIRCUIT FSE CONNECTOR PL5 S-CIRCUIT BLWM CONNECTOR PL6 3-CIRCUIT FSE/HS1 CONNECTOR PRS PRESSURE SWITCH, SPST-CN.O.) ST1-ST2 SELF TEST PINS TP1-TP7 TEST POINT CD THRU (7) TRAN TRANSFORMER-115VAC/24VAC o o JUNCTION UNMARKED TERMINAL PCB TERMINAL MARKED TERMINAL FACTORY WIRING C115VAC) FACTORY WIRING C24VAC) FIELD WIRING C115VAC) FIELD WIRING (24VAC) CONDUCTOR ON PCB FIELD WIRING SCREW TERMINAL FIELD GROUND EQUIPMENT GROUND FIELD SPLICE PLUG RECEPTACLE TO 115VAC FIELD DISCONNECTIONS 1 L2 I NOTE #5 j EQUIPMENT GROUND SCHEMATIC DIAGRAM CNATURAL GAS S PROPANE) HUM-1 (TP1) 0= NOTES= 1. COMMON SIDE (SEC-2 AND C) OF 24VAC TRANSFORMER CONNECTED TO GROUND THROUGH THIS REQUIRED MOUNTING SCREW. 2. IF ANY OF THE ORIGINAL EQUIPMENT WIRE IS REPLACED USE WIRE RATED FOR !05°C. 3. INDUCER (IDM) AND BLOWER CBLWM) MOTORS CONTAIN INTERNAL AUTO-RESET THERMAL OVERLOAD SWITCHES. A. BLOWER MOTOR SPEED SELECTIONS (PL5) ARE FOR AVERAGE CONDIT...
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