Ladder Diagram
HOT | NEUTRAL |
3A(FUSE) | FROST SENSING |
SWITCH | |
ARRESTER | |
|
VARISTOR
VARISTOR
GND
RELAY 1 | IG | IGNITION |
|
|
E
SWITCHING
POWER SUPPLY
| PG |
| DC170V | DC12V | |
|
|
| DC12.6V | DC40V | |
|
|
| DC5V |
| |
|
| A | B | C SG | |
WATERFLOW | A |
| B |
| |
SENSOR |
|
|
|
| |
QS | WATERFLOW |
|
|
| |
SENSOR |
|
|
| ||
| CIRCUIT |
|
|
| |
WATERFLOW | A | SG |
|
| |
CONTROLDEVICE |
|
|
|
| |
M | WATERFLOW |
|
|
| |
CONTROL DEVICE |
|
| |||
| CIRCUIT |
| CPU | ||
A | SG | ||||
|
| ||||
CONTROL DEVICE | CENTRAL |
| |||
M | PROCESSING | ||||
CONTROL DEVICE | UNIT |
| |||
| CIRCUIT |
|
|
| |
SG |
|
| |||
A | RELAY 1 | RELAY |
|
| |
DRIVING |
| ||||
|
| CIRCUIT |
| ||
THERMAL FUSE | SV0 |
|
|
| |
SV1 | SOLENOID |
| |||
| DRIVING |
| |||
OVER HEAT |
| CIRCUIT |
| ||
SWITCH | SV2 |
|
|
| |
| SV3 |
|
|
| |
OUTGOING WATER | B | SG |
| ||
THERMISTOR |
|
|
|
| |
HEAT EXCHANGER |
|
|
| ||
THERMISTOR | THERMISTOR |
| |||
|
| ||||
| CIRCUIT |
|
| ||
AIR TEMPERATURE |
|
|
| ||
THERMISTOR |
|
| SG |
| |
|
|
|
| ||
INDOOR MODEL ONLY |
| SG |
|
| |
|
|
|
| ||
D
A B C
MODULATING VALVEPOWER CONTROL CIRCUIT
SG
D E
FAN
CONTROL
CIRCUIT
PG
A
FLAME DETECTING CIRCUIT
SG
GND
A B
REMOTE CONTROLLER CIRCUIT
SG
MODULATING
SOLENOID
VALVE
POV
COMBUSTION
FAN
FAN
FLAME ROD
FR
REMOTE
CONTROLLER
VA Series Indoor LS Manual | 41 |
