Downflo Workstation, DWST 4-1 to 6-4
A22
IEC Control Panel Installation
Electrical work must be performed by a qualified electrician and comply with all applicable national and local codes.
Turn power off and lock out electrical power sources before performing service or maintenance work.
Do not install in classified hazardous atmospheres without an enclosure rated for the application.
1. Mount the control panel in a convenient, accessible location.
2. Connect tubing to the low pressure barbed fitting located on the control panel (as shown) to the barb fittings on the rear of the
power module marked Low.
3. Wire the control panel to the motor and solenoid valves as shown in Optional IEC Control Panel Motor Wiring Diagram and
Optional IEC Control Panel to Solenoid Valves Wiring Diagram.
Note: Access the solenoid valves and blower motor by removing the access covers at the rear of the power module.
Replace cover when wiring is complete.
Control Box Tubing Connection
control box
plastic tubing
barbed nylon tee
When the aftershift button is activated in single power module collectors, the blower turns off and each valve pulses three times.
The blower turns on, the valves pulse three more times, and both blower and pulsing turn off.
When the aftershift-cleaning button is pushed, the amber light illuminates and the pulse sequence is initiated. The pulse sequence
continues until terminated by the aftershift-cleaning timer. This timer, located inside the control box, is factory set for a specified
length of time depending upon how many power modules are used. The timer for a single power module is set at 3 minutes, two
module at 6 minutes, three module at 9 minutes, and four module at 12 minutes. This allows each pair of filter cartridges to be
pulse cleaned six times at the end of the shift. If experience indicates that more time is required to pulse clean the filter cartridges,
the timer can be adjusted from the factory setpoint to a maximum of 100 hours.
