A
DJ & DG MANUAL
9 of 34
May 12 R2
The gasket material provided for the curb is closed cell foam. Closed cell foam is dense and does
not compress easily. If the unit is split and shipped in sections there will also be gasket material for
sealing between sections. The gasket material for splits is open cell foam. It is less dense than the
closed cell foam and compresses easily.
ONLY USE THE CLOSED CELL FOAM GASKET PROVIDED FOR SEALING THE CURB.
Curbs may be broken down for shipping. Field assembly is required by the installing contractor. Bolt
all sections together at split joints using hardware provided. The installing contractor must caulk and
seal all joint and corner flashings. All flashings and braces that are provided must be installed. DO
NOT screw/penetrate joint, corner or adaptor flashings. Refer to assembly instructions sent with
roof curb.
SHIPPING MATERIALS
Remove shipping materials. Shipping materials may include, but are not limited to:
•
Protective covers over openings, inlets, condenser coils etc.
•
Protective covers over split sections if provided.
•
Tie-down bolts, straps and blocks on fan and compressor vibration isolators.
•
Tie-down bolts, straps and blocks on tilt equipped heat pipes and enthalpy/desiccant wheels if
supplied.
•
Indirect fired heat exchangers may be supported with wood for shipping. Remove.
ASSEMBLY
Warning:
m
Assembly of split units requires bolting together the base frame of adjacent
sections. This may require personnel to work under the unit during
assembly. Injury or death can result from improper support or improper
loading of the curb. Additional temporary support shall be provided by the
installer for the safety of personnel.
If the unit is split and shipped in sections, the sections must be field assembled. All sections are pre-drilled
for assembly. The hardware and gaskets are packed in one of the sections. Apply the gasket, align the
sections. The base frame must be bolted together first. Access below the unit for bolting of the base frame
must be provided. Once the base frame has been tightly fastened, loosely assemble all the bolts and nuts,
and then tighten. Caulk all split lines. Install split joint caps. The inlet hood is designed for field installation.
On outdoor units connect the hood to the support flange and attach with appropriate fasteners. Connect all
wiring on units that had been split for shipment.
The gasket material provided for the split is open cell foam. Open cell foam is light and compresses easily.
If the unit is mounted on a curb provided by Engineered Air there will also be gasket material for sealing
the curb. The gasket material for curbs is closed cell foam. It is more dense than open cell foam and does
not compress as easily.
ONLY USE THE OPEN CELL FOAM GASKET PROVIDED FOR SEALING THE SPLIT(S).
SPLIT UNIT WIRING
All split wiring must be completed by an electrician prior to starting the equipment. A number of different
methods are used to reconnect the wiring.
Power wire: this wiring is generally not broken or spliced, and will extend from the device back to the
contactor or terminal block inside the electrical panel(s). The wire will be tagged to identify which panel it
extends to and will be numbered to the corresponding connection.
Содержание DG SERIES
Страница 32: ...A DJ DG MANUAL 32 of 34 May 12 R2...
Страница 33: ...A DJ DG MANUAL 33 of 34 May 12 R2...
Страница 34: ...A DJ DG MANUAL 34 of 34 May 12 R2...
