Labconco Precise HEPA-Filtered Glove Boxes 5220231 - Manual (Page 17)

Chapter 3: Getting Started
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Connecting the Electrical Supply to the Glove Box
115V, 60 Hz; 100V, 50 Hz; or 100V, 60 Hz Models
Connect the power cord supplied to the IEC electrical supply plug on the
back of the glove box. 115V or 100V models are rated at 8 amps total.
The maximum circuit load for the interior electrical duplex is 5 amps.
230V, 50 Hz or 230V, 60 Hz Models
The same procedure applies for the 230V model except it is shipped without
a plug. Install the appropriate plug per local requirements. The 230V, 50 Hz
or 230V, 60 Hz models are both rated at 4 amps total. The interior
electrical duplex is rated at 2 amps.
Setting the Exhaust Volume with the Speed
Control Adjustment
For Precise HEPA-Filtered Glove Boxes, adjustment of the speed control
provides control of exhaust air volume and is located on the front panel. The
exhaust air volume should be adjusted at the low setting for weighing
operations. (Consult your Safety Officer for airflow recommendations
for your application). Working at the lowest exhaust volume appropriate
for the application will give the quietest operation. To increase the rate of air
volume changes after working in the glove box and to ensure proper cleaning,
the speed control should be set at a higher (50 to 100) dial setting for 5 to 10
minutes as recommended by the operator’s predetermined protocol and the
chart below. The exhaust volume is increased by turning the speed control
counterclockwise.
Dial Setting
for Cleaning
Internal Air
Volume
Approximate
Air Volume
Changes per
Minute
Estimated
Total Exhaust
Volume
(CFM)
Minimum
Recommended
Times to
Clean Internal
Air Volume
(minutes)
50 4.7 61 10
100 7.7 100 5