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4 Wiring Requirements
Figure 4-2_Control Inputs
GAS PRESSURE SWITCH
ROOM THERMOSTAT /
ZONE CONTROL
FLOW SWITCH
SYSTEM SENSOR
OUTDOOR SENSOR
SEQUENCER / BUILDING
MANAGEMENT SYSTEM
LOW VOLTAGE
CONNECTION
BOARD
HEAT EXCHANGER 1 /
HEAT EXCHANGER 2 INLET
TEMPERATURE SENSOR
HEAT EXCHANGER 1 /
HEAT EXCHANGER 2 OUTLET
TEMPERATURE SENSOR
HEAT EXCHANGER 1 /
HEAT EXCHANGER 2 FLUE GAS SENSOR
HEAT EXCHANGER 1 /
HEAT EXCHANGER 2 HIGH LIMIT SENSOR
FLAME SENSOR
LOW WATER CUTOFF
BLOCKED DRAIN SWITCH
TOUCH PANEL
INTERFACE
PC INTERFACE
SECONDARY
SMART TOUCH
CONTROL MODULE
PRIMARY
SMART TOUCH
CONTROL MODULE
HW TANK SENSOR
HW THERMOSTAT
TOUCH DISPLAY
MODBUS COMMUNICATION
BOARD
Modbus Instructions