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A. Configuring
Units for Downflow (Vertical) Discharge
8. Check
for gas
leaks
at the
field
installed
and
factory
installed
gas
lines
after
all piping
connections
have
been
completed.
Use soap-and-water
solution
(or method
speci-
fied by local
codes
and/or
regulations).
IN
--]
d_..1_ TEE
/
NtPPLE
_,_
CAP
Fig. 11 -- Sediment Trap
IX. STEP 9 -- INSTALL DUCT CONNECTIONS
The unit has duct flanges on the supply
and return
air open
ings on the side and bottom of the unit.
See Fig. 2 5 for con
nection
sizes and locations.
1.
2.
Open all electrical
disconnects
before starting
any serv
ice work.
Remove
return
duct
covet"
located
on
duct
panel.
Figure
12 shows
duct
covet" removed.
Save
duct
cover
and
screws.
3. Locate lances in basepan
insulation
that are placed over
the
perimeter
of the
vertical
duct
opening
covet"
(Fig. 13).
4. Using a straight
edge and sharp
knife, cut and remove
the insulation
around
the perimeter
of the cover. Re-
move and save 5 screws securing
the cover to the base-
pan and slide out the covet'. Discard
the cover (Fig. 14).
5. Remove
supply
duct
covet" located
on duct
panel.
Figure
12 shows
duct cover removed.
Save duct covet"
and screws.
Remove and discard
2 screws which secure vertical
dis
charge
opening
cover to basepan
(Fig. 15). Slide covet"
forward to disengage,
then tilt and remove cover through
vertical
discharge
opening
in bottom
of unit.
Discard
duct covet" (Fig. 16).
7. If unit ductwork
is to be attached
to vertical
opening
flanges on the unit basepan
0ackstand
applications
only),
do so at this time.
8. It is recommended
that the basepan
insulation
around
the perimeter
of the vertical
return
air opening
be se
cured to the basepan
with aluminum
tape. Applicable
local codes may require
aluminum
tape to prevent
ex-
posed fiberglass.
9. Covet" both horizontal
duct openings
with the duct coy
ers fi'om Steps
2 and 5. Make
sure opening
is air- and
watertight.
10. After completing
unit
conversion,
perform
all safety
checks and power up unit.
NOTE:
The design
and installation
of the duct system
must
be in accordance
with the standards
of the NFPA for instal-
lation
of nonresidence-type
air conditioning
and ventilating
systems,
NFPA 90A or residence
type, NFPA 90B; and/or
lo
cal codes and residence
type, NFPA
90B; and/or
local codes
and ordinances.
--11--
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