McQuay IM 777-4
3
Introduction
Introduction
General Information
The system design and installation must follow accepted industry
practice as described in the ASHRAE Handbook, the National
Electric Code, and other applicable standards. Install this
equipment in accordance with regulations of authorities having
jurisdiction and all
applicable codes.
Installation and maintenance must be performed by qualified
personnel familiar with applicable codes and regulations and
experienced with this type of equipment. Sheet metal parts,
self
-
tapping screws, fins, clips, and such items inherently have
sharp edges; the installer should exercise caution.
Receiving and Handling
1
Carefully check items against the bills of lading to verify
all crates and cartons have been received. Carefully
inspect all units for shipping damage. Report damage
immediately to the carrier and file a claim.
2
Skyline air handler units are constructed of galvanized or
painted steel and are inspected thoroughly before leaving
the factory. Take care during installation to prevent
damage to units.
3
Take special care when handling the blower section. All
fans are dynamically balanced before leaving the factory.
Rough handling can cause misalignment or a damaged
bearings or shaft. Carefully inspect fans and shaft before
unit installation to verify this has not happened.
Note:
Screws, bolts, etc., for assembling sections are supplied
in a bag attached to each section. All necessary
gasketing is applied in the factory for section-to-section
mounting, unless the unit has a curb ready base. Units
require caulk sealant between sections.
Unit Storage
Store unit on a level surface. If air handling units are stored for
any period of time, periodically rotate the fan wheel to prevent
permanent distortion of drive components. In addition, grease
may settle in the lower part of the bearing, which can lead to
oxidation on the upper portion of the bearing surface. Keep the
fan bearings lubricated.
Nomenclature
Installation Guidelines
CAUTION
Sharp edges and coil surfaces are a potential injury hazard.
Avoid contact with them.
ATTENTION
Les bords tranchants et les surfaces des bobines sont un
risque de blessure. Ne les touchez pas.
OAH 003 G D A C
Model
OAH = Outdoor air handler
OAC = Outdoor air component
Nominal Unit Size
(nominal square foot of coil)
003, 004, 006, 008, 010, 012, 014, 017, 021, 025,
030, 035, 045, 055, 065, 080, 085, 090
Vintage of McQuay Air Handling Unit
Unit Cross Section
C = Standard unit cross section
M = Custom size cross section
Motor Location
A = Motor along side of fan housing
D = Motor downstream of belt drive plenum fan
F = Motor on inline fan
G = Motor downstream of direct drive plenum fan
T = Motor behind twin housed fans
Unit Type/Coil Position
B = Blow-thru cooling coil location
D = Draw-thru cooling coil location
H = Heating only
V = Vent only
