Runco Sc 1 Projector User Manual

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Runco SC-1 Owner’s Operating Manual 19 
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3.3 
Installation 
Considerations
Proper installation of your projector will ensure the quality of your display. Whether you are 
installing a projector temporarily or permanently, you should take the following into 
account to ensure your projector performs optimally.
Installation TypeChoose the installation type that best suits your needs: front or rear screen. Table 3-2 
compares these various installation methods. 
Ambient LightIn general, minimize or eliminate light sources directed at the screen. Contrast ratio in your 
images will be noticeably reduced if light directly strikes the screen, such as when a shaft 
of light from a window or floodlight falls on the image. Images may then appear washed 
out and less vibrant.
Table 3-2. Projector Installation Options 
AdvantagesConsiderations
Front Screen, Floor Mount Installation

 changed quickly


Rear Screen, Floor Mount Installation


t light rejection


Rear Screen, Floor Mount with Mirror

t light rejection

other rear screen installations

 
						

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Throw DistanceThrow distance is the distance measured from the front of the projector to the screen. 
This is an important calculation in any projector installation as it determines whether or not 
you have enough room to install your projector with a desired screen size and if your 
image will be the right size for your screen.
You can quickly estimate the throw distance by multiplying the width of the screen by the 
lens throw ratio; see 
Figure 3-1. The result of this calculation tells you roughly how far 
back the projector should be positioned from the screen in order to project a focused 
image large enough to fill the screen.
Figure 3-1. Estimating Throw Distance
➤
In this example, a 1.49-1.93 zoom
lens with a 15-foot wide screen
results in a throw distance of
268.20 to 347.40 inches
(22.35 to 28.95 feet).
Front of
projector
Signature C Primary Lens
with CineWide
Anamorphic Lens 
(1.49-1.93)
180 x 1.49 (max. zoom) = 268.20 in.
180 x 1.93 (min. zoom) = 347.40 in.
Screen             x Lens Throw Ratio  =  Approximate Throw Distance 
						

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Throw Distance Ranges: Table 3-3 lists the available lens options for the SC-1 and their 
associated throw ratios. 
Table 3-3. SC-1 Lens Options and Throw Ratios 
Signature 
Lens 
Option 
(Note 2)Throw Ratio 
with Primary 
Lens Only
Throw Range in 
inches, with a 
96x54-inch 
(1.78:1) ScreenThrow Range in 
inches, with a 
102.6x54-inch 
(1.90:1) Screen 
(Note 3)Throw Ratio 
with Primary 
Lens and 
Anamorphic 
LensThrow Range in 
inches, with a 
126.9x54-inch 
(2.35:1) Screen 
(Note 3)
Min.Max.Min.Max.Min.Max.
A1.40-1.58134.40151.68
Not Applicable (Note 2)1.32-1.50135.43153.90
B1.57-1.93150.72185.28
1.48-1.81151.84185.70
C
1.96-2.55188.16244.80
1.84-2.40188.78246.24
1.49-1.93189.08244.92
D
2.37-3.19227.52306.24
2.25-2.99230.85306.77
1.80-2.41228.42305.83
E
3.22-4.56309.12437.76
3.02-4.28309.85439.13
2.44-3.45309.64437.80
F
4.30-6.00412.80576.00
4.03-5.63413.48577.64
3.05-4.26387.04540.59
G
5.50-8.50528.00816.00
5.16-7.97529.42817.72
3.91-6.03496.18765.21
Notes: 
1. Throw distance does not affect image quality, provided these ranges are taken into account.
2. Only the Signature C, D, E, F and G lenses can be used with the optional CineWide (secondary 
anamorphic) lens. Doing so affects the throw distances as shown here. 
3. The “1.90:1” throw distances are for reference only. The SC-1 has a native resolution of 2048 x 
1080, which is about a 1.90:1 native aspect ratio. With most source material, the SC-1 only uses 
the center, 1,920 pixels in each row (1920
 x 1080 = 16:9 or 1.78:1 native aspect ratio).  
						

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Vertical and Horizontal 
Position
Proper placement of the projector relative to the screen will yield a rectangular, 
perfectly-centered image that completely fills the screen.
Ideally, the projector should be positioned perpendicular to the screen and in such a way 
that the lens center and screen center are aligned with each other, as shown in 
Figure 3-2.
Figure 3-2. Projector Placement
Vertical and Horizontal 
Lens 
Shift
If it is not possible to align the projector and screen as shown in Figure 3-2, you can use 
the mechanical lens shift controls to center the image on the screen. Lens shift is generally 
expressed as a percentage of the screen height or width, as shown in 
Figure 3-3 and 
Figure 3-4.
Figure 3-3. Vertical Lens Shift (Example only)
➤
Screen
Height 
Floor Lens Center
Projection Distance
Lens Center
x
➤
50% OFFSET 50% Offset 0% Offset
Note: This is a general example of lens shift. Projectors vary in their shift capabilities. No 
particular lens or projector is shown in this example. 
						

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Figure 3-4. Horizontal Lens Shift (Example only) 
Vertical Lens Shift: The SC-1 provides up to 43% of vertical lens shift up or down. For 
example, with a 96 x 54-inch (16:9) screen, you can shift the image up to 23.22 inches 
(59.0
 cm) above or below the screen center. 
Horizontal Lens Shift: The SC-1 allows up to 20% of horizontal lens shift left or right 
(17% with a 1.90:1 screen). For example, with a 96
 x 54-inch (16:9) screen, you can shift 
the image up to 19.20 inches (48.8 cm) left or right of the screen center. With a 
95
 x 50-inch (1.90:1) screen, you can shift the image up to 16.15 inches (41.0 cm) left or 
right of the screen center.
1. With zero offset (no vertical or horizontal lens shift), the lens 
center and screen center are aligned with each other. The SC-1 
is never ceiling mounted; offsets are calculated only with the 
projector upright. These offsets are references to zero offset.
2. Vertical shift limits are percentages of the screen height. 
Horizontal shift limits are percentages of the screen width.
3. The SC-1 has a native resolution of 2048 x 1080, which is about 
a 1.9:1 aspect ratio. For 16:9 material, only the 1920 x 1080 area 
is used which is a 16:9 (1.78:1) aspect ratio. Most often, the 16:9 
throw distance is used. If used with CineWide or CineWide with 
AutoScope, only the 16:9 area is used.
20% Offset
Max. amount of
image to one
side of lens
center = 20%
(approx.)
Note: This is a general example of lens shift. Projectors vary in their shift capabilities. No 
particular lens or projector is shown in this example.
Note 
						

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If you find that you cannot raise or lower the image enough using mechanical vertical 
offset, you may need to make keystone adjustments or vertically shift the image using the 
on-screen display (OSD) controls, to compensate. For detailed instructions, refer to 
Using 
the On-Screen Menus on page 69.
If images remain keystoned or exhibit uneven brightness, the projector may simply be too 
high or low in relation to the screen. Relocate the projector to correct these issues. 
Moving the SC-1Four or more people can lift and hand-carry the SC-1 a short distance as required. 
When using a forklift to transport the SC-1, a specially-designed mounting frame with 
forklift rails is required; contact Runco International for more information. 
Other ConsiderationsOther considerations and tips that can help improve your installation:
 Keep the ambient temperature constant and below 35°C (95°F). Keep the projector 
away from heating and/or air conditioning vents. Changes in temperature may cause 
drifts in the projector circuitry, which may affect performance.
 Keep the projector away from devices that radiate electromagnetic energy such as 
motors and transformers. Common sources of these include slide projectors, 
speakers, power amplifiers and elevators. 
3.4 
Installing the 
Projection Lens, Lamp 
and Cooling
Before or after you have positioned the projector in its permanent or temporary location, 
install the remaining components: the primary lens, lamp and external extractor fan. 
Installing the Primary LensThe projection lens is shipped separately from the projector. Proceed as follows to install 
the projection lens:
1. Remove the lens plug from the lens opening in the projector.
2. Place the lens cap on the projection lens to protect it from being damaged during the 
installation process.
3. Remove the rear cap from the lens. This protective cap is only used during shipping to 
protect the lens from damage.
4. Orient the primary lens with the serial number and UP labels at the top (see Figure 3-5). 
Fully insert it straight into the lens mount opening all the way back without turning. With 
the lens fully back, it will seat properly within the lens mount.
5. Lock the lens assembly in place with lens locking lever DOWN.
➤
➤
➤
1. The lens seals the projection head, preventing contaminants 
from entering the area of main electronics. Never attempt to 
operate the projector without a lens installed. During transport 
and installation, install a lens plug. 
2. Always re-install a lens in its previous “UP” orientation. 
Caution 
						

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Figure 3-5. Installing the Primary Lens
Serial
Number
Label 
						

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Installing the LampTo install the lamp, remove the screw holding the lamp/air filter cover in place. Then, lift 
the cover up and away from the projector. 
Turn the knob to open the inner lamp cooling compartment and reveal the cathode end (–) 
of the lamp; see 
Figure 3-6. 
Figure 3-6. Accessing the Lamp Cooling Compartment
➤
Xenon arc lamps are under high pressure and must be handled 
with great care at all times. Lamps may explode if dropped or 
mishandled. 
Never open the lamp door unless you are wearing protective 
clothing. Recommended protective clothing includes — but may 
not be limited to — protective gloves, latex lab gloves, a 
double-layer 0.040” acetate face shield, and a quilted ballistic nylon 
jacket or welder’s jacket. 
WARNING
(turn to
open)
Remove
Lamp/Air Filter
Cover
Lamp Cooling Compartment Door 
						

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Before installing the projector lamp, check the lamp cradle (anode end) location and adjust 
as necessary; see 
Figure 3-7. For a 2.0-kW lamp, move the cradle to the rear position, 
approximately 1” closer to the reflector. 
Figure 3-7. Lamp Cradle Adjustment
To complete the lamp installation, refer to Lamp and Filter Replacement on page 91 for 
detailed instructions. Observe all warnings, and wear protective clothing and shielding.
Liquid CoolingDuring operation, a closed loop of flexible tubing circulates liquid coolant from a small 
reservoir to critical electronic components located near the front of the projection head. 
The coolant (a 50/50 mix of distilled water and ethylene glycol) should fill slightly more than 
half of the reservoir to ensure adequate circulation. The reservoir, which is located in the 
igniter compartment, is factory-filled and does not require draining for transit. Check the 
coolant level regularly.  
						

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Installing the Extractor 
Fan and Exhaust Duct
Install an extractor fan and duct to pull warm exhaust air from the projector at a minimum 
rate of 600 cubic feet per minute (CFM). 
If necessary, consult a knowledgeable HVAC technician for help with designing and 
installing a cooling solution that best suits your site and installation requirements. Due to 
the wide variety of available materials and installation methods, Runco can only provide 
general guidelines. Review the following information carefully and adapt it as appropriate 
to your specific situation:
 Direct exhaust as necessary to keep ambient air temperature between 50°F (10°C) and 
95°F (35°C). 
 If the projector is used for extended periods, particularly in a confined space, routing to 
the outside of the building may be required. In all cases, maintain at least 600
 CFM at 
the projector’s top exit port. 
 
 
To calculate the air flow, use an air flow meter to measure the ft/min or ft/sec where the 
duct connects to the projector (measure at this end only). Multiply this reading by the 
cross-sectional area of the 8” duct (0.34 sq. ft.) to calculate the CFM airflow:
 
 
Measured linear ft/min x 0.34 = CFM 
 
Given the area of the exhaust duct, the measured air flow must be at least 1765 linear 
feet per minute (600 ÷ 0.34) in order to maintain 600 CFM. 
 Use a duct that is no less than 10 inches and no more than 6 feet long; see Figure 3-8. 
To prevent possible transfer of fan vibration to the image, do not mount the extractor 
directly on the projector — include at least 10 inches of duct. 
 For longer exhaust runs at your site, add extractors/boosters as necessary. The vane 
switch at the projector’s top exit port will trigger a projector shutdown if the airflow is 
inadequate.
➤
Do not operate the projector without an extractor fan installed! 
Do not exceed 6-ft. duct length without adding additional 
extractors.
WARNING
Note