Orion 7816 User Manual

Orion® Cooling Fan

#7816

The Orion cooling fan is designed to work with 8", 10" and 12" Orion
reflector telescopes. The cooling fan significantly reduces the cool­ing time of the large mirror, which results in crisp views in a shorter
amount of time. It runs safely, silently, and with no vibration imparted
to the telescope. These instructions will tell you how to install and
use the cooling fan. Please read them thoroughly before installing

the fan.

Parts List

1 Fan

1 Fan cover

1 Battery pack

4 Screws

4 Washers

Assembly

1. Place the fan on the rear of the mirror cell of the telescope and
line up the holes in the fan with the threaded holes in the mirror
cell. Make certain the label on the fan is facing the primary mirror.

2. Place the fan cover over the fan so the holes in its corners line
up with the holes in the fan and mirror cell (Figure 1). The fan
cover should be oriented so that its corners seat flush onto the
fan.

3. Thread a screw, with a washer attached, through the fan cover
and fan and into the mirror cell (Figure 2). Firmly tighten the
screw, but be careful not to overtighten and strip the threads.
Repeat this for the other three screws (and washers).

4. Insert eight D-cell batteries (not included) into the battery pack.
Orient the batteries as shown on the white plastic battery holder.

5. Plug the cord from the battery pack into the fan. The fan should
begin rotating. If it doesn't, check the connections and orienta­tion of the batteries and try again. To turn the fan off, unplug the
cord from the fan.

Using the Cooling Fan

The cooling fan should be turned on as soon as the telescope is
brought outdoors before observing. It should run for approximately
15-30 minutes to properly cool down the telescope. During observ­ing, the fan should be turned off. This is because even though it
runs free from vibration, the air currents it generates in the optical
tube will degrade image quality. Once the mirror has cooled to the
outdoor ambient temperature, the fan will not be needed again
until your next observing session.

Figure 2. Attaching the fan to the mirror cell.

Figure 1. Line-up the holes in the fan and fan cover with the holes in

the rear of the mirror cell.

Providing Exceptional Consumer Optical Products Since 1975

One-Year Limited Warranty

This Orion Cooling Fan is warranted against defects in materials
or workmanship for a period of one year from the date of purchase.
This warranty is for the benefit of the original retail purchaser only.
During this warranty period Orion Telescopes & Binoculars will
repair or replace, at Orion’s option, any warranted instrument that
proves to be defective, provided it is returned postage paid to:
Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. If
the product is not registered, proof of purchase (such as a copy of
the original invoice) is required.
This warranty does not apply if, in Orion’s judgment, the instru­ment has been abused, mishandled, or modified, nor does it
apply to normal wear and tear. This warranty gives you specific
legal rights, and you may also have other rights, which vary from
state to state. For further warranty service information, contact:
Customer Service Department, Orion Telescopes & Binoculars,
89 Hangar Way, Watsonville, CA 95076; [phone].

Customer Support [phone]
Email: [e-mail]

Corporate Offices [phone]
89 Hangar Way, Watsonville, CA 95076

IN 217 Rev C 03/09