Armstrong Air BCE7S Series, Руководство по установке

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507746-01 Issue 1821 Page 6 of 39
Installation
These units are factory-configured for upflow and
horizontal right-hand discharge installation. For downflow
or horizontal left-hand discharge, certain field modifications
are required.
Disassemble/Reassemble Air Handler Units
The air handler units consists of two factory-assembled
sections. It may be necessary to disassemble the sections
when positioning the unit for installation.
To disassemble:
1. Remove access panels.
2. Remove both blower and coil assemblies. This will
lighten the cabinet for lifting.
3. Remove one screw from the left and right posts inside
the unit. Remove one screw from each side on the
back of the unit. Unit sections will now separate.
To reassemble:
1. Align cabinet sections together.
2. Reinstall screws.
3. Replace blower and coil assemblies.
4. Replace access panel.
Upflow Application
Use the following procedures to configure the unit for
upflow operations:
1. Remove access panels.
2. Remove and discard the horizontal drip shield (-060
model, used only on horizontal applications) and
the corrugated padding between the blower and coil
assembly.
3. The horizontal drain pan must be removed when the
coil blower is installed in the upflow position. Removing
the horizontal drain pain will allow proper air flow and
increased efficiency.
4. After removing the horizontal drain pan, place the
unit in the desired location. Set unit so that it is level.
Connect return and supply air plenums as required
using sheet metal screws as illustrated in Figure 1.
5. Install units that have no return air plenum on a stand
that is at least 14" from the floor to allow for proper air
return. An optional upflow unit stand as listed in Table
2 is available.
Model Kit Number
All unit sizes 45K32
Table 2. Optional Side-Return Unit Stand
(Upflow Only)
HORIZONTAL DRAIN PAN
(MUST BE REMOVED)
UP-FLOW /
DOWN-FLOW
DRAIN PAN
Figure 1. Upflow Configuration
Horizontal Right-Hand Discharge
Application
Use the following procedures to configure the unit for
horizontal right-hand discharge operations:
NOTE:
For horizontal applications, a secondary drain pan
is recommended. Refer to local codes.
NOTE:
When air handler is located above a finished space,
the secondary drain pan must have a larger footprint than
the air handler. In addition, a 3/4” (19.1MM) overflow drain
line must be:
• Connected to secondary drain pan
or
• Connected to the overflow drain outlet of the air
handler drain pan.
NOTE:
(BCE7S60 Model Only) Before operating the
unit, remove access panels and the horizontal drip shield
and the corrugated padding between the blower and
coil assembly. Discard the corrugated padding and the
downflow drip shields.
NOTE:
(BCE7S60 Model Only) Install the horizontal shield
on the front edge of the horizontal drain pan as illustrated
in Figure 2.
1. No further adjustment is necessary. Set unit so that it
is sloped 1/4" towards the drain pan end of the unit.
2. If the unit is suspended, the entire length of the cabinet
must be supported. If you use a chain or strap, use a
piece of angle iron or sheet metal attached to the unit
(either above or below) to support the length of the
cabinet. Use securing screws no longer than 1/2" to
avoid damaging the coil or filter as illustrated in Figure
3. Use sheet metal screws to connect the return and
supply air plenums as required.