Retrotec Multi-Fan Blower Door - Manual (Page 22)

Page 22 of 37
©Retrotec Inc. 2015
6.1 Connecting 3300 fan Drives (Pre-2012)
3300 fan Drives were manufactured before February 2012. They
have 1 Speed Control Cable port, and 4 pressure ports and only
work with DM-2 gauges. Upgrade them all to Model 3350s.
DO NOT use 3300s with DM32 gauges.
DO NOT run 3300s on 240 Volt generators.
Most 3300 fan Drives
auto switch between 120 and 240 Volts but if connected to a
240V generator, on startup the drive might lock onto 120 V then
blow out when 240 V is reached.
DO NOT mix Model 3300 with 3350s.
This connection can damage the equipment connected, including
the gauge and computer.
Figure 22 and Figure 23 show connections with the 3300 drives, for Common set point or Individual set
point control. Figure 28 shows how to mix 3300 and 3350 drives, which is NOT recommended.
Figure 20: Cable ports on 3300 fan drives
Figure 21: Multiple fans installed in Retrotec folding panels to test a warehouse.