16
MUA-SVX005B-EN
Air For Combustion
W
WA
AR
RN
NIIN
NG
G
C
Ca
arrb
bo
on
n M
Mo
on
no
ox
xiid
de
e P
Po
oiisso
on
niin
ng
g!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w tth
he
esse
e iin
nssttrru
uccttiio
on
nss cco
ou
ulld
d rre
essu
ulltt iin
n C
Ca
arrb
bo
on
n M
Mo
on
no
ox
xiid
de
e P
Po
oiisso
on
niin
ng
g
((ssy
ym
mp
ptto
om
mss iin
nccllu
ud
de
e g
grro
og
gg
giin
ne
essss,, lle
etth
ha
arrg
gy
y,, iin
na
ap
pp
prro
op
prriia
atte
e ttiirre
ed
dn
ne
essss,, o
orr ffllu
u--lliikke
e ssy
ym
mp
ptto
om
mss))
w
wh
hiicch
h cco
ou
ulld
d rre
essu
ulltt iin
n d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y..
N
Ne
ev
ve
err o
op
pe
erra
atte
e a
a u
un
niitt w
wiitth
ho
ou
utt cco
om
mb
bu
ussttiio
on
n a
aiirr a
an
nd
d ffllu
ue
e g
ga
ass p
piip
piin
ng
g iin
n p
plla
acce
e.. E
Ea
acch
h u
un
niitt M
MU
US
ST
T
h
ha
av
ve
e a
an
n iin
nd
diiv
viid
du
ua
all v
ve
en
ntt p
piip
pe
e!! E
Ea
acch
h u
un
niitt M
MU
US
ST
T N
NO
OT
T b
be
e cco
on
nn
ne
ecctte
ed
d tto
o o
otth
he
err v
ve
en
ntt ssy
ysstte
em
mss o
orr
tto
o a
a cch
hiim
mn
ne
ey
y.. Y
Yo
ou
urr v
ve
en
nttiin
ng
g ssy
ysstte
em
m m
mu
usstt n
no
ott b
be
e b
bllo
occkke
ed
d b
by
y a
an
ny
y ssn
no
ow
w,, ssn
no
ow
w d
drriiffttss,, o
orr a
an
ny
y
ffo
orre
eiig
gn
n m
ma
atttte
err.. IIn
nssp
pe
ecctt y
yo
ou
urr v
ve
en
nttiin
ng
g ssy
ysstte
em
m tto
o e
en
nssu
urre
e a
ad
de
eq
qu
ua
atte
e v
ve
en
nttiilla
attiio
on
n e
ex
xiissttss a
att a
allll
ttiim
me
ess!!
Appliances shall be installed in a location in which the facilities for ventilation permit satisfactory
combustion of gas, proper venting, and the maintenance of ambient temperature at safe limits
under normal conditions for use.
Appliances shall be located in such a manner as not to interfere with proper circulation of air
within the confined space. When buildings are so tight that normal infiltration does not meet air
requirements, outside air shall be introduced per Sections 1.3.4.2 and 1.3.4.3 of ANSI Z223.1 for
combustion air requirements. A permanent opening or openings having a total free area of not
less than one square inch per 5,000 Btu/Hr of total input rating of all appliance within the space
shall be provided. Refer to the Indoor Duct Furnace Manual supplied with your unit for more
requirements.
Duct Connections
All ductwork must be properly supported so that no strain is put on the unit. Do not alter or bend
the discharge duct flanges supplied on your make-up air unit.
Duct connections must have a removable access panel in the duct which is connected to a duct
furnace. The duct openings shall be accessible when the unit is installed in service, and shall be
of such size that smoke or reflected light may be observed inside the casing to indicate the
presence of leaks in the heating element. The covers for the panels shall be attached in such a
manner as to prevent leaks. Ducts (or optional outside air hoods) exposed to the outdoors must
be insulated and sealed to prevent water from entering either the unit or building through the
duct.
If a single, double or triple duct furnace only unit is connected to a return air duct, or any other
inlet air restriction, the appliance shall be installed on the positive pressure side of the air
circulating blower.
When connecting return air duct to Standard or High CFM cabinets, attach duct to return air
opening flange when no dampers are used. Otherwise, if dampers are used, attach return air duct
around collar at bottom of damper assembly. Also refer to the Dimensional Data section of this
manual, Submittal Data Sheets and Indoor Duct Furnace Manual specified for your unit.
Gas Piping††
All gas piping must be installed in accordance with local codes. It is required that a ground union
be installed adjacent to the gas valve of each duct furnace, and a ground union be installed just
external of each duct furnace for unit servicing. On vertical runs, a drip leg should be provided
upstream of any control manifold. A gas shutoff valve should be, or may be required by local
codes, installed upstream of the external ground union for each duct furnace. A 1/8 inch N.P.T.
plugged tapping, accessible for test gauge connection, must be installed immediately upstream
of the unit gas supply connection.
N
No
otte
e:: †† For complete Gas Piping installation, see the Indoor Gas-Fired Duct Furnace Installation
and Service Manual.
Gas piping must be installed to allow for removal of burner drawer for unit maintenance. Refer to
Figure 5, p. 14
, and the maintenance section.
IIn
nsstta
alllla
attiio
on
n
Содержание GGAA
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