SECTION 9: G
AS
P
IPING
19 of 57
SECTION 9: GAS PIPING
A gas meter is connected to the service pipe by the
gas s
u
pply company. An existing meter sho
u
ld be
checked, preferably by the company, to ens
u
re that
the meter is adeq
u
ate for the rate of gas s
u
pply
req
u
ired.
Installation pipes m
u
st be fitted in accordance
w
ith
local and national codes. Pipes of smaller size than
the heater inlet gas connection sho
u
ld not be
u
sed.
Gas lines m
u
st meet applicable codes:
United States:
Flexible stainless steel gas hose
(US models) is certified per the standard for
connectors for gas appliances. ANSI Z21.21/CSA
6.10 – latest revision.
Canada:
R
u
bber type 1 gas hose (Canadian
models) is certified as being in compliance
w
ith the
standard for elastomeric composite hose and hose
co
u
plings for cond
u
cting propane and nat
u
ral gas,
CAN/CGA 8.1 – latest revision.
9.1 Connections
Connect the heater to the gas s
u
pply ens
u
ring that
the final connections are as follo
w
s:
• Gas s
u
pply pipe
w
ork is r
u
n in medi
u
m or heavy
ga
u
ge t
u
bing in compliance
w
ith local and
national codes.
• Meter and service m
u
st be large eno
u
gh to
handle all the b
u
rners being installed pl
u
s any
other connected load. The gas pipe
w
hich feeds
the system m
u
st be large eno
u
gh to s
u
pply the
req
u
ired gas
w
ith a maxim
u
m press
u
re drop of
1/2"
w
c. When gas piping is not incl
u
ded in the
layo
u
t dra
w
ing, contact the local gas s
u
pplier.
• An isolating valve and
u
nion connection sho
u
ld
be
u
sed and fitted into the s
u
pply adjacent to the
heater.
• For s
u
spended heaters, an approved metal
flexible connection bet
w
een the isolating valve
and the heater may be
u
sed.
To reduce
pressure loss, use one pipe size lar
g
er than
the heater
g
as connection.
IMPORTANT
- The complete installation m
u
st be
p
u
rged and tested for gas so
u
ndness in accordance
w
ith local and national codes.
Caution:
Do not high press
u
re (in excess of 1/2 psi
[14"
w
c]) test the gas piping
w
ith the b
u
rner
connected. Close man
u
al sh
u
t-off valve d
u
ring any
press
u
re testing eq
u
al to or less than 1/2 psi (14"
w
c).
Check the pipe and tubin
g
ends for leaks before
placin
g
heatin
g
e
q
uipment into service. When
checkin
g
for
g
as leaks, use a soap and water
solution; never use an open flame.
WARNING
Explosion Hazard
Leak test all components of gas piping
before operation.
Gas can leak if piping is not installed
properly.
Do not high pressure test gas piping with
heater connected.
Failure to follow these instructions can result
in death, injury or property damage.
Fire Hazard
Connect gas supply according to Figure 13.
Do not use gas supply pipe and electrical
connections to support heater’s weight.
Gas can leak if not installed properly.
Failure to follow these instructions can
result in death, injury or property damage.
Summary of Contents for Combat UHD-Series
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