Retrotec calibrated fan: model 300 – Retrotec DucTester 341 User Manual
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Page 19 of 83
©Retrotec Inc. 2014
CFM
minimum
CFM
maximum
Range
name
Included
1.1
4.7
11
optional
0.34
1.7
7
optional
0.077
0.42
3
optional
0.018
0.11
2
optional
0.0045
0.032
1
optional
5.1.2.
Retrotec calibrated fan: Model 300
The Model 300 fan has 0.25 hp backward curved impeller that uses 48 Volts that comes from the
supplied power supply. Any input voltage from 100 to 280 Volts AC, 50 to 60 Hz is acceptable. Speed is
controlled using the knob on the 300 fan or the Retrotec digital gauge, which will control the fan to any
desired Set Pressure or Set Speed. The Model 300 Fan has a Fan Top that includes a built in speed
control knob, an on/off switch, and the ability to chain multiple fans together which allows control of
multiple fans using a single gauge.
.
Figure 4: Retrotec Model 300 has a speed control knob and two Ethernet style Speed Control Ports for daisy chaining speed
controls for running many fans together. Tubing connections to the gauge, both color coded, are shown.
The Model 300 has 4 Flow (Fan Pressure) sensors located inside the fan inlet, and 4 self-referencing
pickups located just above and below the fan inlet which are connected to the single green and yellow
ports.