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svf
series
500/600
N. Multiple Boiler and the Modbus Connection
Connector J12
1 The boiler control is capable of multiple boiler communication and can control up
to eight Unity™ 1 0 and 2 0 boilers in one installation
2 To activate the Modbus communications, navigate to the Contractor menu by
holding the WM logo, then press the <MODBUS SETTINGS> button Adjust the
settings displayed according to the system requirements of the BMS
3 When converting to LONmark or BACnet, see the ProtoNode guide
4 See the Advanced Manual for further details
O. Touchscreen Display Connection
Connector J13 or J14
1 The electronic color touch screen display is factory wired to the control and is
connected to the J13 or J14 connector
2 The display harness is wired to a spring terminal on the mounting bracket The
wires are as below J14 is used as the example J13 uses the same wiring pin out
on the control board
a J14-1 White to A+
b J14-2 Green to B-
c J14-3 Black to C
d J14-4 Red to R
F
C
C C C
Assembled From
tested components
Complete system
not tested
550-100-273/0523
boiler manual
1
• This device complies with Part 15 of the FCC
Rules Operation is subject to the following two
conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any
interference received, including interference that
may cause undesired operation
eleCTriCal
Modbus
(Building
Boiler-to-Boiler
Management
Communication
System)
BMSA
BMSB
GND
GND
B3
A3
GND
B2
A2
J12
J14
230100
1
2
Boiler-to
Boiler-to
Boiler Out
Boiler In
(Multiple Boilers
(Multiple Boilers
Only)
Only)
3
230099
4
5
6
Touch screen
Display
7
8
77
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