10
IOM-T-294EXP
2214
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The power LED operates as follows .
LED
Operation
On
Power applied and control is operating correctly
Off
No power or the control is faulty
When powered on, the Smart Boiler Expansion 294EXP communicates to the Smart Boiler Control 294 . The communication LED
operates as follows .
LED
Operation
On
Communication with 294
Off
No communication with 294
All boiler relays are normally off and the modulating outputs at 0 V (dc) or 4 mA . The Smart Boiler Control 294EXP responds to
commands from the 294 to turn on a boiler, the modulating signal, and the boiler pump or valve . The status on the 294EXP
display will match the 294 Boiler Status menu .
Output
LED
Operation
Boiler 5, 9, 13
On
Boiler enable 5, 9, 13 relay is closed
Off
Boiler enable 5, 9, 13 relay is open
Boiler 6, 10, 14
On
Boiler enable 6, 10, 14 relay is closed
Off
Boiler enable 6, 10, 14 relay is open
Boiler 7, 11, 15
On
Boiler enable 7, 11, 15 relay is closed
Off
Boiler enable 7, 11, 15 relay is open
Boiler 8, 12, 16
On
Boiler enable 8, 12, 16 relay is closed
Off
Boiler enable 8, 12, 16 relay is open
Boiler Pump/Valve 5, 9, 13
On
Boiler pump/valve 5, 9, 13 relay is closed
Off
Boiler pump/valve 5, 9, 13 relay is open
Boiler Pump/Valve 6, 10, 14
On
Boiler pump/valve 6, 10, 14 relay is closed
Off
Boiler pump/valve 6, 10, 14 relay is open
Boiler Pump/Valve 7, 11, 15
On
Boiler pump/valve 7, 11, 15 relay is closed
Off
Boiler pump/valve 7, 11, 15 relay is open
Boiler Pump/Valve 8, 12, 16
On
Boiler pump/valve 8, 12, 16 relay is closed
Off
Boiler pump/valve 8, 12, 16 relay is open
Two DIP switches located on the top left side of the control . The DIP switch positions determine the boiler groups that the Smart
Boiler Expansion 294EXP operates .
Boilers
DIP Switch 1
DIP Switch 2
5 to 8
Off
Off
9 to 12
On
Off
13 to 16
Off
On
Sequence of Operation
Power On LED
Communication LED
Boiler Output Operation
DIP Switches
