Retrotec Multi-Fan Blower Door - Manual (Page 20)

Page 20 of 37
©Retrotec Inc. 2015
Solution to 3A and 3B: Individual set point control between zones (“Individual Control” turned On), and
Common set point control within a zone, as shown in Figure 18.
1. Fans within the same zone must run at the same speed.
2. To perform this, fans in an enclosure are connected using a Speed Control Splitter or by
daisy-chaining them together. There will only be one Control Cable that connects from one
of the gauges to one of the fans – This gauge is called the ‘Primary Gauge’ and the other
gauges have no Control Cables to their fans.
3. Fans between zones can run at different speeds.
To perform this with FanTestic, click Tools →Advanced Options → Settings tab → check “Individual
Control”
In the example below, fans 1-3 are all running at one speed and fans 4-6 are all running at another
speed.
Figure 18: Solution3A and B: Balanced flow for fans within a zone, balanced pressure between zones
Note: For each zone, this diagram shows one method to control fans to the same speed by daisy
chaining the fans together. An alternative method is to connect all the fans in a zone to one side of a
Speed Control Splitter (FN280), and the “Primary gauge” to the other side. For detailed schematics on
how fans can be controlled by a “Primary gauge”, refer to diagrams in section 6 for connections that
work best.
75 Pa 75 Pa
Target pressure: 75 Pa
Primary
Gauge Primary
Gauge