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7
SMART
SYSTEM
CONTROL
BOARD
LOW
VOLTAGE
CONNECTION
BOARD
THREE WAY VALVE
(OPTIONAL ON BOILER)
LOUVER RELAY
BUILDING
MANAGEMENT
SYSTEM
RUN TIME CONTACTS
ALARM CONTACTS
ALARM
(OPTIONAL)
UNIT PUMP
SYSTEM PUMP
RELAY
DHW PUMP RELAY
(BOILER)
HOT SURFACE
IGNITER
BLOWER
GAS VALVES
DISPLAY PANEL
PC INTERFACE
(OPTIONAL)
CASCADE
INDICATES CONNECTIONS MADE TO THE LINE VOLTAGE TERM
INAL STRIP LOCATED IN THE CONTROL PANEL AREA
MODBUS
BOARD
(OPTIONAL)
0-10V
FIRING RATE
MODBUS
Control outputs
1 Service (continued)
Copper-fin II/IIE Boiler and Water Heater Service Manual