BLOWER ASSEMBLY
With the VECTOR COMPACT you can achieve multi-directional supply air discharge from a single unit by rotating the blower
to the desired location. It is ideal for tight installations, as 130° of rotation are available with which to position the blower. Its
advanced design allows the blower to be easily removed for rotating or servicing by releasing a single stainless steel clamp and
two (2) mounting ring screws. Rotate the blower to allow the most direct flow of air to the supply air grille.
SUPPLY & RETURN AIR GRILLES
Install the supply air grille as high as possible in a location that will provide uniform air distribution throughout the cabin, grille
louvers should be directed upward. The return air grille should be installed as low and close to the a/c unit as possible to insure
direct uninterrupted airflow to the evaporator. The return air grille should have a minimum four inches (4²) or clearance in front
of it, free from any furniture or other obstructions. In no instance should a supply air discharge be directed towards a return air
grille, as this will cause the system to short cycle. Allow for adequate clearance behind the supply air grille(s) for the transition
box and ducting connection. The following table shows minimum grille sizes. See the MAINTENANCE section of this manual
for return air filter cleaning instructions.
DUCTING
Good air flow is critical for the performance of the entire system. It is highly dependent on the quality of the ducting installation.
The ducting should be run as straight, smooth and taut as possible minimizing the number of 90 degree bends (two tight 90
degree bends can reduce airflow by 25%). The following table shows minimum duct diameters and their corresponding supply
and return air grille minimum areas in square inches. If a transition box is used, the total area of supply air ducts going out of the
box should equal the area of the supply duct feeding the box. To calculate the square inch area of a round duct, multiply the
radius by itself (r
2
) and multiply that number by 3.1416 (p).
MODEL 7K 10K 12K 16K 24K
DUCT DIA 5" dia 5" dia 6" dia 7" dia 8" dia
DUCT AREA 19.6 sq in 19.6 sq in 28.3 sq in 38.5 sq in 50.3 sq in
R/A GRILLE 88 sq in 98 sq in 140 sq in 168 sq in 280 sq in
S/A GRILLE 40 sq in 50 sq in 70 sq in 84 sq in 140 sq in
The following is a summary of proper ducting connections:
1.Pull back the fiberglass insulation exposing the inner mylar duct hose.
2.Slide the mylar duct hose around the mount ring until it bottoms out.
1. Screw 3 or 4 stainless steel sheet metal screws through the duct hose into the transition ring. Make sure to catch
the wire in the duct hose with the heads of the screws. Do not use band clamps, as the hose will slide off.
2. Wrap the duct tape around the ducting and ring joint to prevent any air leaks.
5.Pull the insulation back up over the mylar to the ring and tape this joint.
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