Horizontal Sidewall Venting; Filter Sizes; Filter Performance - Pressure Drop Inches W.c - York LY8S Technical Manual

036-21618-003 Rev. A (1205)

HORIZONTAL SIDEWALL VENTING

For applications where vertical venting is not possible, the
only approved method of horizontal venting is the use of an
auxiliary power vent. Approved power venters are Fields
Controls Model SWG-4Y or Tjernlund Model GPAK-JT. Fol-
low all application and installation details provided by the
manufacturer of the power vent. This unit may be horizontally
vented using 4" (10.2 cm) diameter pipe with a minimum
length of 4.5 feet (1.37 m) and a maximum length of 34.5 feet
(10.82 m) with up to 4 elbows.
FILTER PERFORMANCE
The airflow capacity data published in the "Blower Perfor-
mance" table listed above represents blower performance
WITHOUT filters. To determine the approximate blower per-
formance of the system, apply the filter drop value for the fil-
ter being used or select an appropriate value from the "Filter
Performance" table shown below.

FILTER PERFORMANCE - PRESSURE DROP INCHES W.C.

Airflow
Opening Size
Range
1 Opening
CFM In³
0 - 750 230
751 - 1000 330
1001 - 1250 330
1251 - 1500 330
1501 - 1750 380
1751 - 2000 380
2001 & Above 463
UNIT CLEARANCES TO COMBUSTIBLES (ALL DIMENSIONS IN INCHES, AND ALL SURFACES IDENTIFIED WITH THE
UNIT IN AN UPFLOW CONFIGURATION)
Application Top
Upflow 1
Upflow B-Vent 1
1
Horizontal
1
Horizontal B-Vent
1. Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal postion) of the furance jacket
and building joists, studs or framing.
6
Minimum
Disposable
2 Openings 1 Opening
In³ inwc
0.01
0.05
0.1
0.1
658 0.15
658 0.19
658 0.19
Left
Front Rear
Side
6 0 0
3 0 0
6 0 0
3 0 0
NOTE: The filter pressure drop values in the "Filter Perfor-
mance" table shown below are typical values for the type of
filter listed and should only be used as a guideline. Actual
pressure drop ratings for each filter type vary between filter
manufacturer.

FILTER SIZES

CFM
1200
1200
1600
1600
2000
2200
2000
NOTES:
1. Air velocity through throwaway type filters may not exceed 300
feet per minute. All velocities over this require the use of high
velocity filters.
2. Air flows above 1800 CFM require either return from two sides or
one side plus bottom.
Filter Type
Washable Fibers
2 Openings 1 Opening
inwc inwc
0.01
0.05
0.1
0.1
0.09 0.14
0.11 0.18
0.11 0.18
Right Floor/
Flue
Side Bottom
3 6 Combustible
0 1 Combustible
3 6 Combustible
0 1 Combustible
Cabinet Side
Size (in)
A 16 x 25
B 16 x 25
B 16 x 25
C 16 x 25
C (2) 16 x 25
C (2) 16 x 25
D (2) 16 x 25
Pleated
2 Openings 1 Opening
inwc inwc
0.15
0.2
0.2
0.25
0.08 0.3
0.1 0.3
0.1 0.3
Closet Alcove Attic
Yes Yes Yes
Yes Yes Yes
No Yes Yes
No Yes Yes
Unitary Products Group
Bottom
(in)
14 x 25
16 x 25
16 x 25
20 x 25
20 x 25
20 x 25
22 x 25
2 Openings
inwc
0.17
0.17
0.17
Line
Contact
No
No
1
Yes
1
Yes