The Highest priority
Low Voltage
Interlocks, 24VAC
Factory ------------------------------
Water Flow Switch-----------------
Operator------------------------------
Spare for user or Factory ------
Gas Pressure (High & Low) -----
Variable Frequency Drive--------
Low Water Cutoff-------------------
SYSTEM FLOW PROVE ---------
1
2
3
4
5
6
7
8
Low Fire Hold: Fires the boiler at
the minimum rate while in
Calibrate. This functions exactly
as the T1 input
Calibrate: Allows adjustment of
the Minimum Fire, Maximum
Fire, and Pilot Ignition settings.
Combustion proving switch
from Combustion Air Damper
or Mechanical Draft Control.
Remote
120 VAC
Operator
USB and Flashdrive Ports:
Used by HeatNet Control
Pro and updating firmware.
Local Pump or
Power Open/Power Close Valve
DHW Pump or
Power Open/Power Close Valve
Damper Control
Alarm
JUMPER
WIRE if
Not Used
Please Refer to the
Boiler Wire Diagram
for Wiring Options.
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