|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
4.Pressure Switch Closes, Pre-purge Cycle Starts
|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
6. Burner Light-off
|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
8.End Call for Heat Start Post-purge Cycle
|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
5. Igniter Element Warmup
|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
7. Water Heating
|
|
|
| K3 | K4 |
LINE | 24 | ECO/VENT | PRESSURE | GAS | GAS |
| VAC | SWITCH | SWITCH | VALVE | VALVE |
|
|
|
| RLY 1 | RLY 2 |
K1 |
|
|
|
| GAS |
|
|
|
|
| |
|
|
|
|
| VALVE |
COMB |
|
|
|
|
|
BLOWER |
|
|
|
| K1 |
|
|
|
|
| |
K5 |
|
| CONTROL |
| K5 |
|
|
|
| ||
IGNITER |
| ELECTRONICS | K3 | ||
| K4 | ||||
ELEMENT |
|
|
|
| |
|
|
|
|
| |
|
| CONTROL | WATER |
|
|
|
| HEALTH | TEMPERATURE |
| |
9. End of Sequence, Idle State
STATUS INDICATIONS UNDER NORMAL OPERATING CONDITIONS
17