Modbus Instructions
7Diagrams (continued)
Figure 7-2 Ladder Diagram_Part 2
|
|
|
|
|
|
|
|
|
|
| BOX DEPICTS |
|
|
|
|
|
|
|
|
|
|
|
| OPTIONAL ITEMS |
|
|
|
|
|
|
|
|
|
|
|
| LOW VOLTAGE | |
|
|
|
|
|
|
|
|
|
|
| 120 VAC |
|
120VAC |
|
|
| JUNCTION BOX |
| NEUTRAL GROUND |
|
| HIGH VOLTAGE | |||
|
|
|
|
|
|
|
|
|
|
| ||
| TERMINAL STRIP |
|
|
|
| TERMINAL STRIP |
| L1 | JUNCTION BOX | N / L2 | ||
| 120V SUPPLY "L" |
|
|
|
| 120V SUPPLY "N" |
|
|
| SYSTEM | ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
| PUMP |
|
|
|
|
|
|
|
|
|
|
|
| CONTACTS |
|
| ON / OFF | CONTROL MODULE 1 |
|
|
|
|
|
|
|
| ||
| SWITCH |
|
|
|
| SYSTEM PUMP |
|
|
|
|
|
|
|
| F5 |
|
|
|
|
|
|
|
|
| |
|
|
|
| RELAY |
|
|
|
|
| SYSTEM | ||
|
|
|
|
|
|
|
|
| HEX 1 | |||
|
|
|
|
|
|
|
|
|
|
| PUMP | |
| 5A |
| SYSTEM PUMP |
|
|
|
|
|
| BOILER |
| |
|
|
|
| RELAY |
|
|
|
|
|
| PUMP |
|
|
|
|
|
|
| HEX 1 |
|
|
|
| CONTACTS |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| BOILER PUMP |
|
|
|
|
|
|
|
|
|
|
| RELAY |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
| BOILER | |
|
|
|
|
|
|
|
|
|
|
| HEX 2 | |
|
|
|
| BOILER PUMP |
|
|
|
|
|
| PUMP | |
|
|
|
|
|
|
|
|
| BOILER | |||
|
|
| RELAY |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| PUMP |
| |
|
|
|
|
|
|
|
| JUNCTION BOX | DHW PUMP |
| CONTACTS |
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
| RELAY |
|
|
| |
|
|
|
|
|
|
|
|
|
|
| ||
| JUNCTION |
|
|
|
|
|
| (FIELD SUPPLIED) |
| LOUVER |
| |
|
|
|
|
|
|
|
|
|
| BOILER | ||
| BOX |
|
| DHW PUMP |
|
|
|
|
|
| CONTACTS | |
|
|
|
|
|
|
|
|
|
|
| PUMP | |
|
|
|
| RELAY |
|
|
|
|
|
|
|
|
|
|
|
|
|
| BLOWER |
|
|
|
|
|
|
|
| F4 |
|
| 1 | 2 | 3 |
|
|
|
| |
|
| 3.5A | BLOWER |
|
|
|
|
|
| DHW |
| |
|
|
|
| RELAY |
| 3 |
|
|
|
| PUMP | DHW |
|
| F3 |
|
|
|
|
|
|
| CONTACTS | ||
|
| 1.25A |
|
|
|
|
|
|
|
| (FIELD SUPPLIED) | PUMP |
|
|
| 120 VAC |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| ||
| F2 |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| LWCO |
|
|
| DHW | |
| 3.5A | 24 VAC |
|
|
|
|
|
| ||||
|
|
|
|
|
|
| PUMP | |||||
|
|
|
|
|
|
| ||||||
|
|
|
|
|
|
| LOW GAS | HIGH GAS | CONTROL | |||
|
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
| PRESSURE | PRESSURE | MODULE 1 |
|
|
|
|
|
|
|
|
|
| SWITCH | SWITCH 1 | |
| ON / OFF | CONTROL MODULE 2 |
|
|
|
|
|
|
|
| ||
| SWITCH |
|
|
|
|
|
|
|
|
|
| CONTROL |
|
| F5 |
|
|
|
|
|
|
| HIGH GAS | ||
|
|
|
|
|
|
|
|
| MODULE 2 | |||
|
|
|
|
|
|
|
|
|
|
| PRESSURE | |
| 5A |
| SYSTEM PUMP |
|
|
|
|
|
| SWITCH 2 | ||
|
|
|
|
|
|
|
|
| ||||
|
|
|
| RELAY |
|
|
|
|
|
|
|
|
|
|
|
|
|
| HEX 2 |
|
|
|
|
|
|
|
|
|
|
|
| BOILER PUMP |
|
|
|
|
|
|
|
|
|
|
| RELAY |
|
|
|
|
|
| |
|
|
| BOILER PUMP |
|
|
|
|
|
|
|
| |
|
|
| RELAY |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
| JUNCTION |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
| BOX |
|
| DHW PUMP |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
| RELAY |
|
|
|
|
|
|
|
|
|
| F4 |
|
|
| BLOWER |
|
|
|
|
|
|
|
|
|
| 1 | 2 |
|
|
| CONTROL |
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
| 3.5A |
|
|
|
|
|
|
| MODULE 1 |
| |
|
| BLOWER |
|
|
|
|
|
|
|
| ||
|
| F3 |
| RELAY |
| 3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
| 1.25A |
|
|
|
|
|
|
|
|
|
|
|
|
| 120 VAC |
|
|
|
|
|
|
|
| |
| F2 |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
| 24 VAC |
|
|
|
|
|
|
| ||
| 3.5A |
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
| CONNECTION |
|
| CONNECTION |
|
|
|
|
|
| ||
| BOARD |
|
|
|
|
|
|
|
| |||
|
|
|
|
| BOARD |
|
|
|
|
|
|
|
5 |
|
|
| 6 |
|
|
|
| CONTROL |
| ||
|
|
|
|
|
|
|
|
|
|
| MODULE 2 |
|
| LOUVER |
|
|
|
|
|
|
|
|
|
| |
| PROVING |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| ||
9 |
|
|
| 10 |
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| ||
|
| HEX 1 |
|
|
|
|
|
|
|
|
|
|
|
| FLOW |
|
|
|
|
|
|
|
|
|
|
| 7 | SWITCH |
|
| 8 |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
| HEX 2 |
|
|
|
|
|
|
|
|
| |
|
| FLOW SWITCH |
|
|
|
|
|
|
|
| ||
| 11 |
| 12 |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
| |
|
| HW |
|
|
|
|
|
|
|
|
|
|
|
| THERMOSTAT |
|
|
|
|
|
|
|
|
| |
| 13 |
|
|
| 14 |
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
| ENABLE |
|
|
|
|
|
|
|
|
| |
|
|
|
|
| 4 |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| |
|
| RUN TIME |
|
|
|
|
|
|
|
|
| |
|
| CONTACTS |
| 3 |
|
|
|
|
|
|
| |
|
|
|
|
|
|
| NOTES: |
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
| 1. Where possible, switches are shown without utilities (gas, water or | |||||
|
|
|
|
|
|
|
| electricity) connected to the unit. As such, actual switch states may | ||||
| LWCO |
|
|
| 1 |
| vary from those shown on diagrams depending upon whether utilities | |||||
|
|
|
|
|
| are connected or a fault condition is present. |
| |||||
|
|
|
|
|
|
| ||||||
| ALARM |
|
|
|
|
| 2. See wiring diagram for additional notes. |
|
| |||
|
|
|
|
|
|
|
|
|
|
| ||
|
| CONTACTS |
| 2 |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| ||
TEST SWITCH |
|
|
|
|
|
|
|
|
|
|
| |
PROBE |
|
|
|
|
|
|
|
|
| LADDER DIAGRAM | ||
|
|
|
|
|
|
|
|
| LBL20046 REV D | |||
|
|
|
|
|
|
|
|
|
|
| ||
21 
