Armstrong Air NP14H Series Manual de instruções de instalação e manutenção - Página 10
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The unit operating conditions (including airflow,
cooling operation, ignition, input rate, temperature
rise and venting) must be verified according to these
installation instructions.
Clearances
All units require certain clearances for proper operation
and service. Refer to Table 1 for the minimum clearances
to combustibles required for construction, servicing, and
proper unit operation.
In the U.S., units may be installed on combustible floors
made from wood or class A, B, or C roof covering material.
In Canada, units may be installed on combustible floors.
Units must be installed outdoors.
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet.
Clearance to
Combustibles
Front of unit
Back of unit
Left side
Right side
Base of unit
Top of unit
For any future service, installer must provide access to
screws of top and rear panels.
Table 1. Minimum Clearances
Page 10 of 20
Clearance for
Service Access
0 in.
24 in.
0 in.
0 in.
0 in.
24 in.
0 in.
24 in.
0 in.
0 in.
0 in.
48 in.
Field-Provided Lifting
Spreaders Recommended
Shipping Bracket and Mounting Screws Must be
Removed for Rooftop or Downflow Application
Compressor
Units are shipped with compressor mountings factory
adjusted and ready for operation. Do not loosen
compressor mounting bolts.
Roof Curb Installation
If a roof curb is used, follow the manufacturer's installation
instructions and be sure that all required clearances are
observed (see Clearances section).
Prior to setting the unit on the roof curb, the shipping
bracket located underneath the unit must be removed.
Remove the two screws in the base rail (located on the
front and rear sides of the unit). The four screws and the
bracket can be discarded. See Figure 1.
Rigging Unit
Exercise care when moving the unit. Do not remove any
packaging until the unit is near the place of installation.
1.
Connect rigging to the unit base rails using both holes
in each corner.
2.
All panels must be in place for rigging.
3.
Place field-provided spreaders in place. Spreaders
must be of adequate strength and length (must exceed
unit dimension by 6 inches).
Units may also be moved or lifted with a forklift. The
lengths of the forks of the forklift must be a minimum
of 42 inches.
Figure 1.
Issue 2211
507296G03 / 31-5000670