Cascade Instructions - NTI Trinity TX Series Installation And Operation Manual

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Cascade Instructions

13.0 CASCADE INSTRUCTIONS
The Tx controller has the internal capacity to cascade (lead-lag / stage) up to 16 Tx boilers, without the use of an
external controller. Use the instructions detailed in this section to set-up and install the Tx cascade system.
Communication Wiring – for each boiler in the cascade, wire in parallel electrical connections Argus Link (-)
and Argus Link (+), terminals 1 and 2 (see Figure 12-2).
Establish Managing Boiler – choose one boiler to be the Managing Boiler, this boiler will receive all control
wiring and will be used for setting control parameters (see steps below). All non-Managing Boilers must
have the "S4" switch (located on the top right side of the control) switched OFF. *
* Note: the "S4" switch is factory set to ON. The switch is in the off position when it is closest to the "S4"
marking. The "S4" switch must remain in the ON position on the Managing Boiler.
Plumbing – install the boilers in parallel in a primary/secondary plumbing configuration as illustrated in Figure
13-1. Size common piping as per Table 13-1.
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Figure 13-1 Cascade Plumbing Schematic
Tx I&O Manual