Davis Instruments DWW6326 Manuale Utente

Page 10

Fan-Aspirated Radiation Shield

Refer to this section in your ISS Installation Manual.

Refer to this section in your ISS Installation Manual.

The Wireless Fan-Aspirated ISS is solar powered and is supplied with two 
NiCad C-cell batteries. At your option you may decide to install either zero, 
one, or two C-cell batteries.

✦

Install two fan batteries for maximum length of overnight aspiration but 
with slightly lower average daytime aspiration.

✦

Install only one fan battery for some overnight aspiration but with slightly 
higher average daytime aspiration.

✦

Install no batteries for maximum daytime aspiration and no nighttime 
aspiration.

A low-current fan unit (#7759) is available that uses less power than the stan-
dard fan. This allows the solar-powered Fan-Aspirated ISS to run for a longer 
period of time during darkness. The low-current fan is recommended for use in 
high latitudes during the Winter months, in climates that experience extended 
periods of cloudy weather, or for any location with limited solar charging.

✦

Keep the surfaces clean as the Fan-Aspirated Radiation Shield is less effec-
tive when the surfaces are dirty. Remove dust from the solar panel and the 
screen with a damp cloth.

✦

Remove any debris that obstructs air flow between the radiation shield 
parts e.g., leaves, twigs, webs, and nests.

✦

Avoid spraying insect killer of any kind into the radiation shield as this 
may damage the sensors and the shield.

✦

Once a year: replace the motor (Part # 7758), batteries (solar-powered mod-
els only), and remove any debris lodged inside the unit.

Retrieve your Fan-Aspirated ISS and place on a stable work surface.

Disassemble the Radiation Shield (See page 4).