York B1HH018 Installation Instructions Manual page 13

66297-YIM-C-0205
TABLE 21 -
ADDITIONAL STATIC PRESSURE RESISTANCE
DESCRIPTION
500
Wet Indoor coil 0.01
Economizer 0.00
Filter/Frame Kit 0.01
Electric Heat 0.02
NOTE: 1. Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.
2. The pressure thru the economizer is greater for 100% outdoor air then for 100% return air. If the resistance of the return air duct system is less then 0.25 IWG, the unit will deliver
less CFM during full economizer operation.
CLEARANCES
(Minimum)
Front 12"
Back 0"
Left Side (Filter Access) 24"
Right Side 24"
Below Unit 0"
R
36" (For Condenser
Above Unit
NOTE: FOR UNITS APPLIED WITH A ROOF
CURB, THE MINIMUM CLEARANCE MAY BE
REDUCED FROM 1 INCH TO 1/2 INCH BE-
TWEEN COMBUSTIBLE ROOF CURB MA-
TERIAL AND THE SUPPLY DUCT.
FIG. 3 - CLEARANCES
Unitary Products Group
600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 1,800 1,900 2,000
0.01 0.01 0.02 0.01 0.02
0.00 0.00 0.01 0.01 0.01
0.02 0.02 0.02 0.02 0.02
0.03 0.03 0.03 0.04 0.04
Units may be installed on combustible floors made from wood or class A,
B or C roof covering material.
R
Units must be installed outdoors. Overhanging structures or shrubs
should not obstruct outdoor air discharge outlet.
Air Discharge)
'
F L E X IB L E D U C T
C O L L A R
RESISTANCE, IWG
CFM
0.03 0.04 0.04 0.03 0.04
0.01 0.02 0.03 0.04 0.05
0.03 0.03 0.03 0.03 0.04
0.05 0.06 0.07 0.08 0.09
M IN IM U M C L E A R A N C E O F 1 "
A L L S ID E S F O R T H E F IR S T '
O F D U C T F O R 2 0 & 2 5 k W .
Z E R O IN C H E S T H E R E A F T E R ,
F O R A L L O T H E R H E A T E R S ,
Z E R O IN C H C L E A R A N C E A L L
S ID E S F O R E N T IR E L E N G T H
O F D U C T .
0.04 0.05 0.05 0.06 0.07
0.06 0.07 0.07 0.08 0.08
0.05 0.05 0.06 0.06 0.07
0.10 0.01 0.11 0.11 0.12
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