Radon Hut Manual for Autumn 2002 and Winter 2002/3
posted 10/2/2002 by H.G.Berns,
updated 5/28/2003.
In June 2002, most of the original radon system equipment was removed
(photos).
Then in September 2002, a new air blower was installed with approx.
5 times more air flow capacity of the original service blower.
new radon hut setup (Sep. 2002)
|
Currently, the system is operating at full capacity (approx. 50 cubic meter
per minute), but without remote control yet. Installation of the remote
control section was scheduled for November 2002, nut is now postponed
until February 2003 earliest.
Thus, until remote control is installed, we are asking SK shift people to
check the system at least once per day:
Daily system checks (shift tasks)
- Please make sure that the blower still runs.
You don't need to open the door and enter the radon hut for this
purpose. When you are near the Atotsu tunnel entrance simply listen if
you can hear the humming of the blower inside the hut.
Also, you should be able to hear and feel some low amount of
air hissing out of side of the the air filter and at the gasket
to the 12" black air pipe elbow behind the hut.
- Check air duct outlets in SK control room and/or SK dome.
After entering the SK control room, please check if there is airflow
coming out of the supply duct outlets on the ceiling. Thin napkin strips
are taped on top of each air duct outlet as simple airflow indicators.
Do they move up with the airflow? Then everything is fine.
Also, there is a big air duct outlet at the entrance of the SK dome
right above where the access hallway ends.
If the napkins are not moving, then the system is appearantly off.
Please go back to the radon hut and try to restart it (see below).
Weekly system checks (shift tasks)
- Check oil windows of the new blower.
The oil windows are located behind the right side of the large
enclosure of the new blower (on left side of radon hut main room
when you open the main door). Two holes were drilled in the side
wall of the enclosure so you can look directly into the oil windows
without opening up the enclosure.
side panel of the new blower |
left oil window |
right oil window |
As long as you can see oil appearing in both windows (amber color),
then everything is fine.
If one of the windows or both look dry, then please contact an expert
immideately (see below).
- Check if there is an oil leak.
Please check the floor near the new air blower for oil leaks.
The floor should remain dry at all times. If you see oil assembling
on the floor, please contact an expert immediately (see below).
How to restart the system (e.g. after power outage)
If you find the system stopped, then go to the grey plastic cabinet
on the street side of the hut (see photo above). Open the cabinet door and
you will see the control panel inside as shown below.
drive control panel
| 
control keypad and display
|
Normally, the display should show "60.00" (Hz). If it shows "0000",
then push and hold the "UP" key for several seconds until the number
has incremented to 60.00. Then push the "FWD" (forward) button.
[Careful, do not push the "REV" (reverse) button!] Then, please contact
an expert as soon as possible and inform that the blower was stopped.
How to stop the system
Push the red STOP button on the drive controller in the plastic cabinet.
The frequency of the blower will ramp down to 0.00 (Hz) within the next
20-30 seconds. After the blower stops, you'll see the display blinking
with the default frequency (should be 60.00 Hz).
Experts
