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AR(H,W) Lead lag Operation
Master Boiler
setup
• Modulates on system
sensor connected to
master boiler
• System temperature
sensor must be
connected to boiler #1.
• Outdoor temperature
sensor must be
connected to boiler #2.
1) Place toggle switch to LOCAL
2) Press and
3) Select System Identification & Access
4) Verify MB1 Modbus address = 1
5) Verify MB2 Modbus address = 1
6) Select Lead Lag Master Configuration
7) Select Master Enabled = Enabled
Fixed Setpoint operation
8) Enter CH Setpoint (Fixed setpoint)
4-20mA/ 0-10Vdc setpoint operation
9) Select [Advanced Settings >]
10) Press the to arrive at Central Heat
11) Select Setpoint Source = S2 (J8-6) 4-20mA
12) Select 4mA water temperature
13) Select 20mA water temperature
14) Select Lead Lag Slave Configuration
15) Select Slave enabled = Enable slave for built-in Lead Lag master
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