HOT |
|
| NEUTRAL |
3A(FUSE) | FROST SENSING |
|
|
SWITCH |
|
| |
ARRESTER |
|
| |
|
|
| |
VARISTOR | VARISTOR |
|
|
|
|
| |
GND | RELAY 1 |
| IGNITION |
| IG |
| SWITCHING |
|
| POWER SUPPLY |
|
PG | DC170V | DC12V |
E
D
DC12.6V
DC5V
DC40V
|
| A | B |
WATERFLOW | A |
|
|
SENSOR | WATERFLOW |
|
|
QS |
|
| |
SENSOR |
|
| |
| CIRCUIT |
|
|
WATERFLOW | A | SG |
|
CONTROLDEVICE | WATERFLOW |
|
|
M |
|
| |
CONTROLDEVICE |
| ||
| CIRCUIT |
|
|
A | SG |
| |
CONTROLDEVICE |
| ||
M |
| ||
CONTROLDEVICE |
| ||
| CIRCUIT |
|
|
SG |
| ||
A | RELAY 1 | RELAY |
|
DRIVING |
| ||
|
| CIRCUIT |
|
THERMALFUSE | SV0 | SOLENOID | ||
SV1 | ||||
| DRIVING | |||
OVERHEAT |
| CIRCUIT | ||
SV2 |
|
| ||
SWITCH |
|
| ||
| SV3 |
|
| |
OUTGOING WATER | B | SG | ||
THERMISTOR |
|
|
| |
HEAT EXCHANGER |
|
| ||
THERMISTOR |
| THERMISTOR | ||
AIR TEMPERATURE | CIRCUIT |
| ||
|
| |||
THERMISTOR |
|
|
| |
INDOOR MODEL ONLY |
| SG |
| |
|
|
| ||
C SG
BA B C
MODULATING VALVEPOWER CONTROL CIRCUIT
| SG |
|
CPU | D | E |
CENTRAL |
|
|
PROCESSING | FAN |
|
UNIT |
| |
| CONTROL |
|
| CIRCUIT |
|
PG
A
FLAME
DETECTING
CIRCUIT
SG
GND
A B
REMOTE
CONTROLLER
CIRCUIT
SG SG
MODULATING SOLENOID VALVE
POV
COMBUSTION FAN
FAN
FLAME ROD
FR
REMOTE CONTROLLER
Figure 10. Ladder Diagram.
WARNING
DO NOT adjust any dipswitch settings on PC board unless instructed to do so.
30