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| BLOWER OFF DELAY |
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| (WHEN USED) |
| TO 115VAC FIELD DISCONNECT |
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| SCHEMATIC DIAGRAM | |||||||||||
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| PCB |
| PRS |
| LGPS |
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| (NATURAL GAS & PROPANE) | |||||||
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| JUMPER SELECT |
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| NOTE #2 |
| GND |
| EQUIPMENT GROUND | ||||||||||||
| PRINTED |
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| J2 | 90 | 120 |
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| ORN |
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| ILK |
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| LO |
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| CIRCIUT | G |
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| NOTE #11 |
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| HEAT |
| MED HI |
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| Com |
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| YEL |
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| OL | START |
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| BOARD | W |
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| M | GV |
| BLWR |
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| COOL NOTE #10 |
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| ORN |
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| FRS |
| C |
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| COM |
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| RED | RED |
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| HSIR |
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| RED |
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| IDR |
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| IDM |
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| PL2 | 2 | PL3 | 2 |
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| OL |
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| BLU |
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| PR1 | 115VAC |
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| NEUTRAL |
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| 2 | CAP - 2 |
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| 24VAC |
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| GRN/YEL |
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| BRN | BRN |
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| WHT |
| AUX |
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| F U 1 NOTE #6 |
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| IDM |
| PRINTED |
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| COOL |
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| PL3 |
| OL |
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| FRS | LS | |||||
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| BHT/CLR | BLWR |
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| BLK |
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| WHT | 2 | HSI |
| CIRCIUT |
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| LGPS | (WHEN USED) | |||
| HEAT |
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| BLK |
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| BLK | 1 |
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| PR1 |
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| BOARD | W |
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| WHT | BLK (HI) |
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| WHT | (COM) |
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| WHT |
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| HUM |
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| PL1 |
| NOTE #11 |
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| BLK |
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| PRS |
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| BLWM |
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| FUSED OR CIRCUIT BREAKER |
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| GRN/YEL |
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| YEL |
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| JB |
| DISCONNECT SWITCH (WHEN REQ’D) |
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| NOTE #2 |
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| (MED HI) |
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| BRN |
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| 4 |
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| WHT |
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| WHT |
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| NEUTRAL |
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| FU2 |
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| NOTE #10 |
| START | CAP |
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| 10 |
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| GV |
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| BLK |
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| L1 |
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| M |
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| RED (LO) |
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| BLK |
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| BLU |
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| ILK |
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| CPU |
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| BRN |
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| GND |
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| Y |
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| (MED LO) |
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| NOTE #3 | |
L | BHT/CLR | BLOWER MOTOR SPEED CHANGE RELAY, SPDT |
| OL |
| G |
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| 1 |
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| TEMPERATURE SWITCH (N.C.) |
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E BLWR |
| BLOWER MOTOR RELAY, |
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| PCB | PRINTED CIRCUIT BOARD CONTROL |
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| 9 |
| FSE |
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G | BLWM |
| BLOWER MOTOR, |
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| PL1 |
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CAP 1,2 | CAPACITOR |
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E CPU |
| MICROPROCESSOR AND CIRCUITRY |
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| PL2 |
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| COM |
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| 7 |
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N |
| ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.0 AMP MAX.) | PL3 |
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| PCB |
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| 3 |
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| PL4 |
| 24V |
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D |
| ELECTRONIC AIR CLEANER CONNECTION (COMMON) |
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| NOTE #5 |
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| PRS | PRESSURE SWITCH, |
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| 11 |
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| FRS |
| FLAME ROLLOUT SW. |
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| NOTES: |
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| FSE |
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| TEST/TWIN |
| COMPONENT TEST & TWIN TERMINAL |
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| FU 1 |
| FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED |
| TRAN |
| 1. | If any of the original equipment wire is replaced use wire rated for 105°C. |
|
| |||||||||||||||||||
| FU 2 |
| FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE |
|
| JUNCTION |
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| ||||||||||||||||||
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| 2. | Use only copper wire between the disconnect switch and the furnace junction box (JB). |
| ||||||||||||||||||||
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| (FIELD INSTALLED & SUPPLIED) |
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| UNMARKED TERMINAL |
| 3. | This wire must be connected to furnace sheet metal for control to prove flame. |
|
| ||||||||||||||||||
| GND |
| EQUIPMENT GROUND |
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| 4. | Symbols are electrical representation only. |
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| GV |
| GAS |
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| PCB CONTROL TERMINAL |
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| ||||||||||||||
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| 5. | Solid lines inside PCB are printed circuit board conductors and are not included in legend. |
| ||||||||||||||||||||
| GVR 1, 2 | GAS VALVE RELAY, |
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| ||||||||||||||||||
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| FACTORY WIRING (115VAC) |
| 6. | Replace only with a 3 amp fuse. |
|
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| ||||||||||||||
| HSI |
| HOT SURFACE IGNITER (115 VAC) |
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| ||||||||||||||
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| FACTORY WIRING (24VAC) |
| 7. | Inducer (IDM) and blower (BLWM) motors contain internal | |||||||||||||||||||||
| HSIR |
| HOT SURFACE IGNITER RELAY, |
|
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| ||||||||||||||||||||||
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| 8. | Neutral connections are interchangeable within the NEUTRAL connector block. |
|
| ||||||||||||||||||||
| HUM |
| 24VAC HUMIDIFIER CONNECTION (0.5 AMP. MAX.) |
|
| FIELD WIRING (115VAC) |
|
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| ||||||||||||||||||||
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|
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| 9. | Blower motor speed selections are for average conditions, see installation instructions for details on | |||||||||||||||||||||||
| IDM |
| INDUCED DRAFT MOTOR, PSC |
|
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| ||||||||||||||||||
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| FIELD WIRING (24VAC) |
|
| optimum speed selection. |
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| |||||||||||||
| IDR |
| INDUCED DRAFT MOTOR RELAY, |
|
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| |||||||||||||
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| CONDUCTOR ON CONTROL PCB |
| 10. YELLOW lead not on all motors. |
|
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| |||||||||||||||
| ILK |
| BLOWER ACCESS PANEL INTERLOCK SWITCH, |
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| ||||||||||||||||
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| 11. Factory connected when LGPS is not used. |
|
|
|
|
|
| ||||||||||||||||||
| J1 |
| BLOWER - OFF DELAY JUMPER SELECTOR |
|
|
| FIELD WIRING SCREW TERMINAL |
|
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| |||||||||||||||
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| 12. |
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| J2 |
| COOLING - OFF DELAY JUMPER |
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| FIELD EARTH GROUND |
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| JB |
| JUNCTION BOX |
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| EQUIPMENT GROUND |
| 13. |
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| LED |
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| LGPS |
| LOW GAS PRESSURE SWITCH, |
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| FIELD SPLICE |
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| 90 seconds or 5 seconds when J2 is cut. |
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| LS |
| LIMIT SWITCH, |
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| PLUG RECEPTACLE |
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Fig. | A02271 |