Installation and Operation Manual
TFTN 085-199
58
Table 11-1
Minimum Pipe Sizes for Multiple Boiler Applications
# of Units
TFTN085
TFTN110
TFTN150
TFTN199
TFTN285
TFTN340
TFTN399
2
1-1/4 in.
1-1/4 in.
1-1/2 in.
2 in.
2 in.
2 in.
2-1/2 in.
3
1-1/4 in.
1-1/2 in.
2 in.
2 in.
2-1/2 in.
2-1/2 in.
3 in.
4
1-1/2 in.
2 in.
2 in.
2-1/2 in.
3 in.
3 in.
4 in.
5
2 in.
2 in.
2 in.
2-1/2 in.
3 in.
4 in.
4 in.
6
2 in.
2 in.
2-1/2 in.
3 in.
4 in.
4 in.
4 in.
7
2 in.
2-1/2 in.
2-1/2 in.
3 in.
4 in.
4 in.
5 in.
8
2 in.
2-1/2 in.
3 in.
4 in.
4 in.
5 in.
5 in.
NOTE
: minimum pipe sizes are based on the flow necessary to achieve a 25°F delta-T at Max Power.
11.2 Setup Procedure
After completing the General Installation above, and before turning the power on or connecting the BUS terminals to each
boiler, proceed with the following Setup Procedure in the order listed:
1.
Disconnect WiFi Cable from Follower Boilers
–
Permanently disconnect and remove the WiFi Cable from each
Follower boiler; only the Manager boiler can be connected to WiFi
–
see Figure 11-2. Connecting more than one WiFi
module (integrated inside the display) will result in a BUS network communication error.
2.
Configure Zone Controllers
–
the zone controller of the boiler where zones 1-3 connect (typically the Manager boiler)
remains in the factory configuration, i.e., BUS wire connected and dipswitches in the ON position. The BUS wire also
remains connected to the zone controller of the boiler where zones 4-6 connect, but the dipswitches must be moved
to the OFF position. The BUS wire must be disconnected from the zone controller of all other boilers connected to
the cascade. See Figure 11-2
Figure 11-2 WiFi Cable and Zone Controller Prep
WiFi Cable
–
disconnect from main PCB and Display of
all Follower boilers; leave connected at Manager boiler.
Zone Control BUS Connector
–
remains connected on the boilers where the
zone inputs/outputs are connected. Disconnect from all other boilers
Dipswitches
–
keep in the ON position (left) on the boiler where zones 1-3
connect. Move to the OFF position (right) on the boiler where zones 4-6 connect.
Zone
Controller
