YORK® CEILING AND INLINE CENTRIFUGAL FANS, CI-SERIES
5
LowSound
For sound critical applications, S type fans delivers the lowest 
sound ratings. All units feature acoustically insulated housings, 
custom designed blower and motor pairings, motors mounted on 
vibration isolators, and for all but the smallest model (CI3H), dual 
inlet blowers
.
HighStaticPressures
When higher static pressures are encountered, the H type fans 
excel. Faster RPM allow these fans to better sustain airow as 
static pressure increases. This makes them well suited for inline 
applications.
Housings
Housings  are  fabricated  of  galvanized  steel.  Acoustical 
installation is used to minimize sound. 
EasyTapSpeedSelection
Select models (CI6S/H, CI8S/H, and CI10S/H) are provided with 
dual speed motors designed to run at nominal speeds of 1050 
and 1550 RPM. By simply changing one wire tap, a fan’s speed 
can be switched. This ability  to alter speed  and air ow  allows 
on the spot adjustments to deal with unforeseen circumstances. 
Systems deciencies can be accommodated in the eld quickly 
and without the added cost of replacing a fan.
Motors
All  units  have  permanently  lubricated  motors  manufactured 
to  our  exacting  specications.  Motors  feature  built  in  overload 
protection and plug in disconnects.
Grilles
Constructed of attractive molded white plastic, aerodynamically 
designed  grilles  feature  an  85%  free  area.  To  make  for  easy 
removal and cleaning, the grilles are held in place with spring 
clips. An optional metal face grille with a white nish is available.
Wheels
Wheels  are  dynamically  balanced  and  performance  matched 
with the motor. On units CI5H and larger, dual inlet blowers are 
employed to minimize sound levels.
QuickAccessWiring
Access to the motor leads is through a panel in the side of the 
unit; there is no need to remove the power pack. However, if the 
need to remove the power pack ever arises, a quick connect plug 
makes the process simple and easy.
FieldConversion
The CI-Series cabinet is designed for quick transition from right 
angle discharge to top discharge or into an inline conguration. 
Simply remove two (or four depending upon model) sheet metal 
screws, switch positions of the access panel and top panel, 
re-attach  screws,  and  a  right  angle  discharge  becomes  a  top 
discharge fan. There is no need to remove the power pack. The 
blower remains oriented in one position while the panels change 
places. The transformation to an inline fan is accomplished by 
the replacement of the grille  with an access panel. Again, only 
two (or four) screws are involved in the process.
FEATURES & BENEFITS
ChangingfromCeilingMounttoInlineConguration
Discard grille and remove 
access panel screws.
Remove access panel. Install optional TDA panel 
and four screws.
Re-install access 
panel and screws.
FieldConversion:ChangingfromRightAngletoTopDischarge
Remove screws. Remove access panel. Rotate access panel 90°. Re-install screws.