Refer
ence
Tr
oubleshooting
Oper
ation And
Maintenance
Fan
Netw
orking
Electrical
Installation
Fir
e System
Integr
ation
Mechanical Installation
Pr
e-Installation
Gener
al
Information
Quick Start
Guide
If networking multiple fans to run using a single control
source, the dipswitch settings and wiring on each fan’s
VFD circuit board will need to be adjusted using the
following instructions.
DIPSWITCH 3
DIPSWITCH 2
First Fan
1. Determine the first fan in the network daisy-
chain by identifying the fan that will be directly
connected to the control source.
2. Dipswitch 2 is used to set parameters that improve
network function. Verify that each of the switches
on dipswitch 2 are set as follows:
Position 1 – Off
Position 2 – On
Position 3 – On
3. Dipswitch 3 is used to set unique Modbus
addresses for each fan in the daisy-chain. Adjust
positions 1-5 on dipswitch 3 to set the desired
Modbus address. A table with all possible Modbus
addresses is shown to the right.
IMPORTANT:
Positions 6 - 8 are used to set parameters
needed for fan operation and should not be adjusted.
Default settings are as follows:
Position 6 – On
Position 7 – Off
Position 8 – Off
4. Verify that the low voltage wiring terminal strip
on the VFD circuit board is wired as shown in the
diagram and picture on this pages 36-37. Reinstall
the black plastic cover that was previously set
aside on the front of the VFD.
Modbus Address Settings - Dipswitch 3
Fan
Number
Modbus
Address
Position
1
Position
2
Position
3
Position
4
Position
5
Position
6, 7, 8
N/A
1
RESERVED FOR HVLS FAN CONTROLS
Do Not
Modify
1
2
On
Off
Off
Off
Off
2
3
Off
On
Off
Off
Off
3
4
On
On
Off
Off
Off
4
5
Off
Off
On
Off
Off
5
6
On
Off
On
Off
Off
6
7
Off
On
On
Off
Off
7
8
On
On
On
Off
Off
8
9
Off
Off
Off
On
Off
9
10
On
Off
Off
On
Off
10
11
Off
On
Off
On
Off
11
12
On
On
Off
On
Off
12
13
Off
Off
On
On
Off
13
14
On
Off
On
On
Off
14
15
Off
On
On
On
Off
15
16
On
On
On
On
Off
16
17
Off
Off
Off
Off
On
17
18
On
Off
Off
Off
On
18
19
Off
On
Off
Off
On
19
20
On
On
Off
Off
On
20
21
Off
Off
On
Off
On
21
22
On
Off
On
Off
On
22
23
Off
On
On
Off
On
23
24
On
On
On
Off
On
24
25
Off
Off
Off
On
On
25
26
On
Off
Off
On
On
26
27
Off
On
Off
On
On
27
28
On
On
Off
On
On
GND
FIRE +
FIRE -
DATA +
DATA -
0-10V
GND
(OPTIONAL)
ALL OTHER FANS IN SERIES
GND
FIRE +
FIRE -
DATA +
DATA -
0-10V
GND
(OPTIONAL)
LOW VOLTAGE WIRING
24v
FIRST FAN IN SERIES
LOW VOLTAGE WIRING
DIP SWITCH BANK 2
1
2
3
4
5
6
7
8
ON
1
2
3
ON
DIP SWITCH BANK 3
DIP SWITCH BANK 2
1
2
3
4
5
6
7
8
ON
1
2
3
ON
DIP SWITCH BANK 3
E
F
Fan Networking
Overhead Ceiling Fans
36
