
40
RT-SVX34R-EN
Installation Piping
General Requirements
W
WA
AR
RN
NIIN
NG
G
H
Ha
azza
arrd
do
ou
uss G
Ga
asse
ess a
an
nd
d F
Flla
am
mm
ma
ab
blle
e
V
Va
ap
po
orrss!!
F
Fa
aiillu
urre
e tto
o o
ob
bsse
errv
ve
e tth
he
e ffo
ollllo
ow
wiin
ng
g iin
nssttrru
uccttiio
on
nss cco
ou
ulld
d
rre
essu
ulltt iin
n e
ex
xp
po
ossu
urre
e tto
o h
ha
azza
arrd
do
ou
uss g
ga
asse
ess,, ffu
ue
ell
ssu
ub
bsstta
an
ncce
ess,, o
orr ssu
ub
bsstta
an
ncce
ess ffrro
om
m iin
ncco
om
mp
plle
ette
e
cco
om
mb
bu
ussttiio
on
n,, 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.. T
Th
he
e sstta
atte
e o
off C
Ca
alliiffo
orrn
niia
a h
ha
ass d
de
ette
errm
miin
ne
ed
d tth
ha
att
tth
he
esse
e ssu
ub
bsstta
an
ncce
ess m
ma
ay
y cca
au
usse
e cca
an
ncce
err,, b
biirrtth
h d
de
effe
eccttss,,
o
orr o
otth
he
err rre
ep
prro
od
du
uccttiiv
ve
e h
ha
arrm
m..
IIm
mp
prro
op
pe
err iin
nsstta
alllla
attiio
on
n,, a
ad
djju
ussttm
me
en
ntt,, a
alltte
erra
attiio
on
n,,
sse
errv
viicce
e o
orr u
usse
e o
off tth
hiiss p
prro
od
du
ucctt cco
ou
ulld
d cca
au
usse
e
fflla
am
mm
ma
ab
blle
e m
miix
xttu
urre
ess o
orr lle
ea
ad
d tto
o e
ex
xcce
essssiiv
ve
e cca
arrb
bo
on
n
m
mo
on
no
ox
xiid
de
e.. T
To
o a
av
vo
oiid
d h
ha
azza
arrd
do
ou
uss g
ga
asse
ess a
an
nd
d
fflla
am
mm
ma
ab
blle
e v
va
ap
po
orrss ffo
ollllo
ow
w p
prro
op
pe
err iin
nsstta
alllla
attiio
on
n a
an
nd
d
sse
ettu
up
p o
off tth
hiiss p
prro
od
du
ucctt a
an
nd
d a
allll w
wa
arrn
niin
ng
gss a
ass p
prro
ov
viid
de
ed
d
iin
n tth
hiiss m
ma
an
nu
ua
all..
All internal gas piping for YC* rooftop units are factory
installed and leak tested. Once the unit is set into place,
a gas supply line must be field installed and connected
to the gas train located inside the gas heat
compartment.
Access holes are provided on the unit as shown in
to accommodate side panel entry.
Following the guidelines listed below will enhance both
the installation and operation of the furnace.
N
No
otte
e:: In the absence of local codes, the installation
must conform with the American National
Standard Z223.1a of the National Fuel Gas Code,
(latest edition).
1. To assure sufficient gas pressure at the unit, use to
determine the appropriate gas pipe size for the
heating capacity listed on the unit's nameplate.
If a gas line already exists, verify that it is sized
large enough () to handle the additional furnace
capacity.
2. Take all branch piping from any main gas line from
the top at 90 degrees or side at 45 degrees to
prevent moisture from being drawn in with the gas.
3. Ensure that all piping connections are adequately
coated with joint sealant and properly tightened.
Use a piping compound that is resistant to liquid
petroleum gases.
4. Provide a drip leg near the unit.
N
NO
OT
TIIC
CE
E
G
Ga
ass V
Va
allv
ve
e D
Da
am
ma
ag
ge
e!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w iin
nssttrru
uccttiio
on
nss b
be
ello
ow
w cco
ou
ulld
d rre
essu
ulltt iin
n
g
ga
ass v
va
allv
ve
e d
da
am
ma
ag
ge
e ffrro
om
m iin
ncco
orrrre
ecctt g
ga
ass p
prre
essssu
urre
ess,,
iirrrre
eg
gu
ulla
arr p
pu
ullssa
attiin
ng
g fflla
am
me
e p
pa
atttte
errn
nss,, b
bu
urrn
ne
err rru
um
mb
blle
e,,
a
an
nd
d p
po
otte
en
nttiia
all fflla
am
me
e o
ou
utta
ag
ge
ess..
U
Usse
e a
a p
prre
essssu
urre
e rre
eg
gu
ulla
atto
orr tto
o p
prro
op
pe
errlly
y rre
eg
gu
ulla
atte
e g
ga
ass
p
prre
essssu
urre
e.. D
DO
O N
NO
OT
T o
ov
ve
errssiizze
e tth
he
e rre
eg
gu
ulla
atto
orr..
5. Install a pressure regulator at the unit that is
adequate to maintain 6" w.c. for natural gas and 11"
w.c. for LP gas while the unit is operating in the
“High Heat” mode. A minimum inlet gas pressure
of 2.5" w.c. for natural gas and 8" w.c. for LP gas is
required while operating in the “High Heat” mode.
N
No
otte
e:: Gas pressure in excess of 14" w.c. or 0.5 psig
will damage the gas train.
W
WA
AR
RN
NIIN
NG
G
E
Ex
xp
pllo
ossiio
on
n H
Ha
azza
arrd
d!!
F
Fa
aiillu
urre
e tto
o ffo
ollllo
ow
w ssa
affe
e lle
ea
akk tte
esstt p
prro
occe
ed
du
urre
ess b
be
ello
ow
w
cco
ou
ulld
d rre
essu
ulltt iin
n d
de
ea
atth
h o
orr sse
erriio
ou
uss iin
njju
urry
y o
orr
e
eq
qu
uiip
pm
me
en
ntt o
orr p
prro
op
pe
errtty
y--o
on
nlly
y--d
da
am
ma
ag
ge
e..
N
Ne
ev
ve
err u
usse
e a
an
n o
op
pe
en
n fflla
am
me
e tto
o d
de
ette
ecctt g
ga
ass lle
ea
akkss.. U
Usse
e a
a
lle
ea
akk tte
esstt sso
ollu
uttiio
on
n ffo
orr lle
ea
akk tte
essttiin
ng
g..
6. Leak test the gas supply line using a soap-and-
water solution or equivalent before connecting it to
the gas train.
7. Pressure test the supply line before connecting it to
the unit to prevent possible gas valve damage and
the unsafe operating conditions that will result.
N
No
otte
e:: Do not rely on gas train shutoff valves to
isolate the unit while conducting gas
pressure/leak test. These valves are not
designed to withstand pressures in excess of
14" w.c. or 0.5 psig.
Connecting the Gas Supply Line
to the Furnace Gas Train
Follow the steps below to complete the installation
between the supply gas line and the furnace. Refer to
for the Gas Train configuration.
1. Connect the supply gas piping using a “ground-
joint” type union to the furnace gas train and check
for leaks.
2. Provide adequate support for the field installed gas
piping to avoid stressing the gas train and controls.
3. Adjust the inlet supply gas pressure to the
recommended 6" for natural gas or 11" w.c. for LP
gas.
Summary of Contents for Voyager Commercial
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