Operating instructions

04/03/2009 6 EI204
Mechanical Installation
Upflow
Using (figure 1) and visualizing the HeatChoice
installation, work through the following eight steps:
Step 1
Observe and select the insert location in the furnace
plenum.
a. Above A-coil
b. HeatChoice II hole cutout at A-coil end (facing
side)
c. Depending upon the specific model, between 8”
and 9.5” of space is required above the top of
the A-coil. This space is where the HeatChoice
II is physically inserted into the plenum.
d. 10” minimum (in addition to the space required
above) between control box and plenum top
e. All distribution ducts above A-coil top
Step 2
Measure plenum width and depth
a. Step 1 determines facing side (hole cut decision)
b. Width
 17” or less – 15” model
 19” or less – 18” model
 20” or greater – 18” model with baffling
(see below)
c. Depth
 20” or less – no baffling
 20” or greater – need rear baffling (see
below)
If your application falls in the 21” or greater mentioned above, field fabricate inside plenum baffling as shown
in (figure 2). (Reference EH101 at the back of this guide for more illustrations).
Figure 1
Figure 2