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VA(H,W) Lead lag Operation
Master Boiler
Description
•
Master boiler lead lag
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.
Electrical Connection(s)
Programming Instructions
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
24
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