Radon Hut Manual for Summer 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 is currently in progress but will not be operational until autumn 2003. Thus, until remote control is installed, we are asking SK shift people to check the system at least once per day:

Daily radon hut system checks (shift tasks)

1. Please make sure that the blower still runs.
   In other words, do you hear the motor inside the blower enclosure running (loud)?
   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.

2. Check water flow meter.
   The flow meter for the cooling water is located on the back side of the radon hut (see pics below) and usually covered by a helmet labeled "SIGNET" for rain/snow protection. The flow value should be in the order of 60 - 75 GPM (gallon per minute). If the water flow is far below 60 GPM or even stopped, please contact an expert as soon as possible.

   water flow meter

   location of the water flow meter behind the hut

3. 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

   The oil levels should be at approx. 1/4 to 1/2 at both windows. The oil is of amber color, sometimes appearing sligtly milky due to tiny air bubbles generated by the motor rotations.
   If one of the windows (or both) show only oil below 1/4 level or even no oil (dry), then please contact an expert immediately (see below)!

4. 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).

• 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.

  airduct outlet in SK mine control room

  airduct outlet with napkin strip as flow indicator

  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 contact an expert (see below)! You might be asked to go back to the radon hut and try to restart the system.

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

System Layout Diagram:

Experts