Ducting - Rheem H2AC Installation Instructions Manual

WARNING
DO NOT, UNDER ANY CIRCUM-
STANCES, CONNECT RETURN
DUCTWORK TO ANY OTHER
HEAT PRODUCING DEVICE SUCH
AS FIREPLACE INSERT, STOVE,
ETC. UNAUTHORIZED USE OF
SUCH DEVICES MAY RESULT IN
FIRE, CARBON MONOXIDE POI-
SONING, EXPLOSION, PERSONAL
INJURY, PROPERTY DAMAGE OR
DEATH.
FIGURE 6
LIFTING DETAIL
SPREADER BAR
D
5/8" [14.9 MM]
SHACKLE
EACH CORNER
2. For rigging and roofcurb details, see Figures 6, 7 and 8.
3. The location of the unit on the roof should be such as to provide proper access for
inspection and servicing.
IMPORTANT: If unit will not be put into service immediately, block off supply and return
air openings to prevent excessive condensation.
G.DUCTING
The installing contractor should fabricate ductwork in accordance with local codes. Use
industry manuals as a guide when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 2800 Shirlington Road, Suite 300, Arlington, VA
22206, http:/www.acca.org.
Place the unit as close to the conditioned space as possible allowing clearances as indi-
cated. Run ducts as directly as possible to supply and return outlets. Use of non-flamma-
ble weatherproof flexible connectors on both supply and return connections at unit to
reduce noise transmission is recommended.
On ductwork exposed to outside temperature and humidity, use a minimum of 2" of insu-
lation and a vapor barrier. Distribution system in attic, furred space or crawl space should
be insulated with at least 2" of insulation.
ductwork inside the air conditioned space.
Provide balancing dampers for each branch duct in the supply system. Properly support
ductwork from the structure.
IMPORTANT: In the event that the return air ducts must be run through an "unconfined"
space containing other fuel burning equipment, it is imperative that the user/building
owner must be informed against future changes in construction which might change this
to a "confined space." Also, caution the user/building owner against any future installation
of additional equipment (such as power ventilators, clothes dryers, etc.), within the exist-
ing unconfined and/or confined space which might create a negative pressure within the
vicinity of other solid, liquid, or gas fueled appliances.
A
56-5/8"
[1438MM]
C G
CENTER
OF
GRAVITY
1 / " to 1" thick insulation is usually sufficient for
2
CORNER WEIGHTS BY PERCENTAGE
CAPACITY TONS
(KW)
A B
15 [52.8]
26% 29%
LIFTING BEAM
CABLE OR CHAIN
B
C
47-3/4"
C G
[1213MM]
C
D
18%
27%
ST-A1207-25
15