Vogt Tube-Ice HFO10, Service Manual

Page: 58 / 112

7-2
Sanitizing
To sanitize your Tube-Ice® machine, follow these steps:
1. Pump down the machine and set the Clean/Off/Ice selector switch to the Off position.
2. Remove ice from the storage area.
3. Shut off the water supply and drain the water tank by opening the drain valve. Remove any loose
sediment from the tank.
4. In a clean container, mix 15 gal (56.8 L) of warm water at 90°F – 115°F (32°C – 46°C) with 24 oz (0.71 L) of
Nu-Calgon® IMS- II Sanitizing concentrate (or equivalent, according to the manufacturer’s instructions).
The concentration should be 200 parts per million (ppm) (8 oz [227 g] per 5 gal [18.9 L]) of active
sanitizing solution.
5. Close the drain valve and fill the water tank with the sanitizing solution.
6. Close the adjustable blow down petcock valve on the water pump.
7. Set the Clean/Ice/Off selector switch to Clean and press Start to circulate the sanitizing solution using
only the water pump.
8. Mix an additional 5 gal (18.9 L) of warm water at 90°F – 115°F (32°C – 46°C) with 8 oz (227 g) of
Nu-Calgon® IMS-II Sanitizing concentrate (or equivalent, according to t he manufacturer’s instructions) in
the clean container. The concentration should be 200 ppm of active sanitizing solution.
9. Wearing appropriate gloves, submerge a clean sponge in the sanitizing solution and wipe all inside
surfaces of the water tank and tank cover, including the makeup water float valve.
10. With the water pump running, add the additional 5 gal (18.9 L) of sanitizing solution to the water tank.
Install the water tank cover and allow the sanitizing solution to circulate for at least 20 minutes.
11. While circulating the sanitizing solution, open the adjustable blow down petcock valve and allow the
solution to flow down the drain. With the petcock valve open, allow the water to circulate for at least 3
minutes.
12. Press Stop to stop the pump.
13. Drain and flush the water tank with fresh water.
14. Open the water supply to the machine.
15. Drain, flush tank again, and refill with fresh water.
16. To sanitize the inside of the ice storage area, flood the area with the sanitizing solution, making sure to
wet all surfaces completely for at least 60 seconds. The concentration should be 200 ppm of active
sanitizing solution.
To return the machine to ice-making operation, follow the steps below:
1. Make sure the water tank drain valve is closed and the Clean/Off/Ice selector switch is in the Off
position.
2. Turn on the water supply and refill the tank with clean water.
3. Manually open the thaw gas solenoid valve (D) by running the valve stem in. This increases the pressure
in the evaporator, allowing the machine to operate. After approximately one minute, put the D-valve
back into the automatic position.
4. When the tank is full, turn the Clean/Off/Ice selector switch to the Ice position and push Start . The
machine immediately begins ice production.
5. Check that the adjustable blowdown petcock valve on the recirculating water pump is adjusted properly.
The valve should be adjusted to the minimum rate required to maintain production of clear ice. This
should be no more than 1 gal (3.8 L) per minute for most water sources.