Use a combustible floor base for installations on
combustible material or directly on any floors, as shown
in Figure 4. Follow the instructions supplied with the
combustible floor base accessory. It is possible to replace
this combustible floor base with a matching indoor coil,
correctly sealed to prevent leaks. Follow the instructions
supplied with the indoor coil cabinet for installing the
cabinet to the duct connector. Plug vent pipe hole in the
bottom panel.
Figure 4: Combustible floor base accessory
Downflow air - indoor coil cabinet
Install the furnace with a coil cabinet specifically intended
for downflow application. If using a matching indoor coil,
it is possible to place it directly on the furnace outlet and
seal it to prevent leakage. For details of the coil cabinet
dimensions and installation requirements, refer to the
installation instructions supplied with the coil cabinet.
Attach the indoor coil cabinet to the duct connector
and then position the furnace on top of the coil cabinet.
Seal the connection to the furnace, coil cabinet, duct
connector, and supply air duct to prevent air leakage.
Coil installation
Important: On all installations without a coil, use
a removable access panel in the outlet duct so that
smoke or reflected light are observable inside the
casing, which indicates the presence of leaks in the
heat exchanger. Ensure to attach this access panel
securely to prevent leaks.
Mount the indoor coil on the supply side of the furnace
as shown in Figure 5 to Figure 8 . Refer to the installation
instructions provided with each indoor coil.
Figure 5: Vertical upflow applications with furnaces
Figure 6: Vertical downflow applications with furnaces
Installation Manual: Z8ES Single-Stage Standard ECM Residential Gas Furnaces (Non-condensing Multi-position Standard
and Low NOx)
12
Johnson Controls Ducted Systems
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