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Ladder Diagram
1,500,000 - 1,300,000 - 2,000,000 Btu/hr Models
HOT
WARNING:To
avoid possible shock hazard, disconnect power before servicing.
NEUTRAL
POWER |
|
SWITCH | 2 |
| |
| C |
N | 7 |
NO | 3 |
GROUND | UNIT POWER 120VAC 15AMP | |
|
| |
| GND | VFD |
NO | G | |
COM |
| L1 |
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| L2 |
VFD POWER |
| |
| RELAY |
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R |
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L1 |
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T1 T2
T3
M
BLOWER ASSEMBLY
PUMP POWER 120VAC 15AMP
GROUND PUMP MOTOR
M
COM
NO
L2
S1
S2
IGNITION MODULE
| OPTIONAL |
NO | VENT VALVE |
|
| HOT | COM |
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| SURFACE |
| EXT. GAS VALVE |
1 | 2 | IGNITER |
| |
CONTROLLER HSI |
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| COM | NO | ||
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| 120 |
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| 120VAC GAS VALVE |
| VAC |
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LOW VOLTAGE | GROUND | |
TRANSFORMER | ||
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LV1
COMMAND DISPLAY |
EBUS EBUS |
24 VAC LV2 | GAS VALVE RELAY |
| R |
TO | EARTH 24VAC | 24VAC |
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OVERRIDE |
| ||
| Back | Select | |
TOGGLE |
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SWITCH |
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| GROUND |
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7 | 8 | 9 | CONTROLLER INPUTS |
4 | 5 | 6 | 2 | 3 |
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| 1 |
R | 1 | 2 | 3 |
PUMP RELAY | CONTROLLER OUTPUTS |
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COMMUNICATION CABLE #1
IGNITION |
RESET |
24VAC SOLENOID VALVE |
| ||
| IGNITION |
| |
| MODULE | F2 | |
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| F1 | |
11 | N/A | - | |
+ | |||
10 | TH | ||
9 | PI |
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8 | LV2 |
| |
7 | RESET |
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T | T |
TEST |
|
SWITCH |
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~~~~ |
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~~~~~~~~ | O.C. |
| J1 |
LWCO | 24 VAC |
PROBE | |
| LWCO |
| RESET J2 |
24 VAC | |
BL | Y |
T |
|
6 | 3 |
5 | 2 |
4 | 1 |
| O/BK |
FLOW SWITCH
NO C
OPTIONAL | |
Low | High |
Gas | |
Gas | NC |
NO | C |
C |
|
NC | NO |
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| AIR | Blocked | |
| Drain | ||
SWITCH | |||
NO | |||
C | NO | C | |
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| NC | NC | |
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OPTIONAL Louver
Proving Sw NO
C
NC
6 | LV1 |
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5 | MV |
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4 | PS |
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3 | FF |
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2 | M/S |
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1 | FF |
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| 3 | 2 | 1 | CONTROLLER |
| VFD | |||
| R |
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1 | 2 | 3 |
P |
| GND |
PU |
| G |
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PU |
NC
CONTROLLER |
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INPUTS | 1 | 2 | 3 | 4 | 5 |
LOUVER RELAY |
PU | O |
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CHASSIS |
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RESET | GROUND |
| STD. | ALARM |
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| COM |
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| CONTACTS |
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COM | NO |
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| ALARM | |
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| NO |
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| INDICATOR |
COM |
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STD.
OVER TEMP
INDICATOR
COM | NO | LOUVER |
| STD. | RELAY |
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| CONTACTS |
| REAR |
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| COMMUNICATION | |
| CABLE CONNECTION |
NO | SILENCE SWITCH |
|
ALARM 24VAC OUT
NC | COM |
| |
NC | COM |
|
R
ALARM RELAY
R
IGNITION RELAY
1 | 2 | 3 |
1 | 2 | 3 |
R | CONTROL PANEL | |
COMMUNICATION | ||
RELAY | CABLE CONNECTION | |
|
BYPASS
VALVE
1 | 2 |
CONTROLLER 24VAC |
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| DIP SWITCH #5 ON | ||||||
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| OVER- RIDE | MANUA L | XUM |
| EM TI |
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| RADD |
| ES A B DEOM |
- | + | rw P | moC | tOu | tuO |
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GI S | GI S | V42 | Am | stloV |
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SIGIN- | SIGIN+ | 24VPwr | Com | mAOut | VoltsOut | CALIBRATED . | ||||
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| NOTICE: | ||||
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| FACTORY | |||
PWM |
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| DO NOT | |||||||
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| ADJUST . | ||||||||
CONV. |
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| RUN | 8888 | VOLTS |
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| FWD | AMPS |
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| REV |
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| HERTZ |
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| DIP SWITCH IN | 01 | 02 |
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| DOWN |
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| POSITION |
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| 11 |
| 14 | 15 |
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| L1 | L2 |
| T1 | T2 | T3 |
7 8
9
4 | 5 | 6 |
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PUMP |
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| OUTPUTS |
1 | 2 | 3 |
3 | 2 | 1 | VFD |
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| ENABLE |
| ENABLE | ||
| 1 | 2 | 24VAC |
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| HSI |
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| 1 | 2 |
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| INPUTS | ||
| 3 | 2 | 1 |
GAS |
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| FLOW |
ON |
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| FLAME | ||
| FAILURE |
16 |
| 8 | OUT |
| CONTROLLER | JACK J3 |
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| CABLE #2 | ||||
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| COMMUNICATION | ||||
1718 |
| 67 | OUTOUT |
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| 1514 |
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| n/a |
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| Dial Alarm |
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| INPUTS |
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19 |
| 5 | OUT |
| Float Close | 22VDC | OUT | 13 |
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| 1 | BLK DRAIN | ||
20 |
| 4 | OUT |
| Float Open | V/ma | 12 |
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| 1 | ||||
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| Louver |
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| LO AIR | ||||||||
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21 |
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| OUT |
| Ignition Enable | GND | 11 |
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| 2 | ||||
| 3 |
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| LOUVER | ||||||||
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22 |
| 2 | OUT |
| n/a | LowAir/Block Drain | V/ma | 10 |
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| 3 | |||
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| 4 | GAS HI/LO | |||||||||
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23 |
| 1 | OUT |
| Pump Relay | OA Sensor | OHM | 9 |
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| 5 |
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24 | 24 | VAC COM |
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| GND | 8 |
| 3 | 2 | BYPASS SENSOR | |||
25 | 24 | VAC |
| Bypass Water Sensor | OHM | 7 |
| 2 | |||||||
26 |
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| HSI | Outlet Water Sensor | OHM | 6 | BYPASS | 1 | 1 | 1 | OA SENSOR | ||||
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| SENSOR | 1 | ||||||||||||
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| GND |
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| GND |
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| OA |
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2 7 |
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| 5 | 1 2 | 1 | SENSOR | OPTIONAL | |||||
28 |
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| Gas Valve | Inlet Water Sensor | OHM | 4 | 2 | 1 2 |
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29 |
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| Low Wtr Flow |
| S/S |
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| 3 | 1 |
| 1 | 1 | OUTLET | ||
30 |
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| GND |
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| LED |
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| 2 | ENABLE | INLET | OUTLET | ||
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| SENSOR | ||||||||
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31 |
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| Flame Failure |
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| GND | 1 | SWITCH | SENSOR | SENSOR | ||||
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| E |
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| G BK | BK | INLET SENSOR | ||
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| CHASSIS |
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| OVERRIDE TOGGLE SWITCH | GROUND |
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| RUN/STOP SWITCH |
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| TO PUMP |
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| RELAY COIL |
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| OPTIONAL: |
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| 50 Hz Limit Resistor |
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| 1.2K Ohm |
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LBL20021 REV B
77