Double Deck J4PG4 Installation Manual

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● The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this
reason, the contractor should use only industry-recognized procedures.
● Each ton of cooling requires between 350 and 450 cubic feet of air per minute (CFM), or 400 CFM nominally.
● Duct design and construction should be carefully done. System performance can be lowered dramatically through bad planning
or workmanship.
● Air supply diffusers must be selected and located carefully. They must be sized and positoined to deliver treated air along the
perimerter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they
cause drafts. Return air grilles must be properly sized to carry air back to the blower. If they are too small, they also cause
noise.
● The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a
comfortable living space.
● An air velocity meter or airflow hood can give a reading of system CFM.
● When installation, installer should select the air speed according to the actual setting static pressure. Please refer to the Table
10-1 & Table 10-2.
Table 10-2 Motor Speed from factory
Temperature
rise
range(℉)
Motor
HP
Blower
Size
Motor Speed
from factory
Usable
Motor Speed
Gas HeatCooling
Model
45-75
30-60
45-75
35-65
25-55
25-55
30-60
Low
Middle
High
Low
Middle
High
Low
Middle-1
Middle-2
Middle-3
High
Low
Middle-1
Middle-2
Middle-3
High
Middle-1
Middle-2
Middle-3
High
Middle-1
Middle-2
Middle-3
High
Middle-1
Middle-2
Middle-3
High
Usable
Motor Speed
All
All
All
All
Middle-1
Middle-2
Middle-3
High
Middle-1
Middle-2
Middle-3
High
Middle-1
Middle-2
Middle-3
High
Motor Speed
from factory
Low
Low
Middle-2
Middle-3
Middle-2
Middle-3
Middle-3
J4PG4024B1060AA
J4PG4030B1060AA
J4PG4036B1090AA
J4PG4042B1090AA
J4PG4048B1090AA
J4PG4060B1090AA
J4PG4060B1110AA
Low
Low
Middle-3
Middle-3
Middle-2
Middle-2
Middle-2
10×10
10×10
10×10
10×10
11×10-5/8
11×10-5/8
11×10-5/8
1/6
1/4
1/2
1/2
3/4
3/4
3/4