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RECEIVING AND INSTALLATION
I. STEP 1 -- CHECK EQUIPMENT
A. Identify Unit
The unit
model nmnber
and serial
number
are stamped
on
unit identification
plate. Check this information
against
ship
ping papers
and job data.
B. Inspect Shipment
Inspect
for" shipping
damage
while
unit
is still on shipping
pallet.
If unit appears
to be damaged
or is torn loose fl'om its
anchorage,
have it examined
by transportation
inspectors
be-
fore removal.
Fm_vard
claim papers
directly
to transporta-
tion company.
Manufacturer
is not responsible
for any darn
age incnrred
in transit.
Check all items against
shipping
list. hnmediately
notify your
representative
if any item is missing.
To prevent
loss or damage,
leave all parts
in original
pack
ages until installation.
II. STEP 2 -- PROVIDE UNIT SUPPORT
A. Roof Curb
Install
accessory
roof curb
in accordance
with
instructions
shipped
with
curb.
See Fig. 6 for roof curb dimensions.
In
stall insulation,
cant strips,
roofing,
attd flashing.
Ductwork
must
be attached
to curb.
IMPORTANT: The gasketing
of the unit
to the roof curb
is
critical
for a watertight
seal. Install
gasketing
material
sup-
plied with the roof curb.
hnproperly
applied
gasketing
can
also result
in air leaks
and poor" unit
performance.
Curb should
be level to within
1/4inch. This is necessa W for
unit drain
to flmction
properly.
Refer to accessory
roof curb
installation
instructions
for
additional
information
as
required.
B. Slab Mount
Place the unit
on a solid, level concrete
pad that
is a mini
mmn of 4 in. thick with 2 in. above grade.
The slab should
be
flush on the front of the unit
(to allow condensate
drain
in-
stallation)
and should
extend
2 in. on the three
remaining
sides of the unit.
See Fig. 7. Install
a 6tin. gravel
apron
in
fl'ont of condenser
air inlets
to prevent
obstrtiction
of airflow
by grass
or shrubs.
Do not secure
the unit to the slab exc'u_t
when
required
by local codes.
C. Flush Mount
Place
side of unit
with
duct panel
flush against
transition.
On units with optional
base rails, the skirt on duct-panel
side
of unit cat] be removed or relocated
to allow unit to be mounted
flush against
transitions
that
extend
below basepan
of trait,
To move skirt,
proceed
as follows:
1. Remove 4 screws holding skirt to base rail. Retain screws.
2. Remove skirt or slide skirt inwards
until alternate
clear
ance holes align with base rails.
3. Secure
with screws removed
in Step 1. Holes align with
base rails.
To remove wood support
under unit (with base rail only), loosen
4 screws above rigging
holes and slide assembly
out through
rectangular
hole.
III. STEP 3 -- FIELD FABRICATE DUCTWORK
Secure
all ducts to roof curb and building
structure
on verti-
cal discharge
units.
Do [rot cczmect chlctwork
to unit. For hori-
zontal
applications,
unit is provided
with flanges on the hori
zontal openings.
All ductwork
should be secured
to the flanges.
Insulate
attd weatherproof
all external
ductwork,
joints,
attd
roof openings
with counter
flashing
and inastic
in accordance
with applicable
codes.
Ducts
passing
through
an unconditioned
space
must
be in-
sulated
and covered
with
a vapor
barrier.
If a plenmn
return
is used on a vertical
unit, the return
should
be ducted
through
the roof deck to comply with
applicable
fire codes.
A minimum
clearance
is not required
around
ductwork.
Cabi-
net return
air static
shall
not exceed
-.25 in. wg.
IV. STEP 4 -- PROVIDE CLEARANCES
The required
n_inimunt
operating
and service clearances
are
shown in Fig. 2-5. Adequate
combustion,
ventilation,
and cot]-
denser
air must be provided,
in accordance
with section
5.3,
Air for Combustion
and Ventilation,
of the National
Fuel Gas
Code ANSI (American
National
Standards
Association)
Z223.1
(in Canada,
sections
7.2, 7.3 or 7.4 or Can/CGA
[Canadian
Gas Association]
B 149 Installation
Codes), or applicable
pro-
visions
of local building
code.
The condenser
fat] pushes
air through
the condenser
coil and
discharges
it through
the bank
of louvers
in the top cover,
the decorative
grille on the right side of the unit, and the con>
presser
access panel.
Be sure that the fan discharge
does not
recirculate
to the condenser
coil. Do not locate the unit in ei-
ther
a corner
or tinder
an overhead
obstruction.
The mini-
mum
clearance
under
a partial
overhang
(such as a normal
house overhang)
is 48-in. above the unit top. The maximunl
horizontal
extension
of a partial
overhang
must
not exceed
48 inches.
Do not place the unit where
water,
ice, or snow fl'om an over-
hang
or roof will damage
or flood the unit.
Do not install
the
unit
on carpeting,
tile, or other
combustible
materials.
The
unit may be installed
on wood flooring or on Class A, B, or C
roof covering
materials.
V. STEP 5 -- RIG AND PLACE UNIT
Use
spreader
bars
or crate
top when
rigging
the
unit.
The
units
must
be rigged
for lifting
as shown
in Fig.
8 and
9. Re-
fer to Table
1 for operating
weight
attd
to Fig.
2 5 for" corner
weights.
U[se extreme
c'ozlticzr
to pz'eveirt
ct_moge
wheir
mov
ing
tire zmib
U)rit must
['emoin
in on zqJz'(ght
[rositio:r
dzlz'inq
oH ['{qgd/_,_ and
moviz\_
OlreZ'ation.s.
The unit
Intist
be level
for
proper
condensate
drainage;
therefore,
the
groundqevel
pad
or accessory
roof curb
must
be level
before
setting
the
unit
it]
place.
When
a field
fabricated
support
is used,
be sure
that
the
support
is level
and
properly
supports
the
unit.
--6--
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