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Wiring requirements, Smart control module – Lochinvar 1.5 User Manual

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Wiring Requirements

Figure 4-2_Control Inputs

ModBus Instructions

GAS PRESSURE SWITCHES

DHW THERMOSTAT /

SENSOR

ENABLING DEVICE

SYSTEM SENSOR -

SUPPLY

OUTDOOR SENSOR

SEQUENCER / BUILDING

MANAGMENT SYSTEM

LOW VOLTAGE

CONNECTION

BOARD

INLET TEMPERATURE

SENSOR

OUTLET TEMPERATURE /

HI-LIMIT SENSOR

FLUE GAS SENSOR

LOUVER PROVING SWITCH

FLAME SENSOR 1 & 2

LOW WATER CUTOFF

BLOCKED DRAIN SWITCH

DISPLAY PANEL

PC INTERFACE

SMART CONTROL

MODULE

AIR PRESSURE SWITCH

SYSTEM SENSOR -

RETURN

AUX SWITCH 1 & 2

0-10 INPUT FROM

SYSTEM PUMP

BLOWER PROVING

SWITCHES

CASCADE

INLET AIR SENSORS

MANUAL RESET

HIGH LIMIT

VENT DAMPER

PROVING SWITCH

MODBUS

BOARD