CTHN-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
70 of 91
SECTION 16: GAS PIPING
Install the gas hose as sho
w
The gas hose accommodates expansion of the
heating system and allo
w
s for easy installation and
service of the b
u
rner. Before connecting the b
u
rners
to the s
u
pply system, verify that all high press
u
re
testing of the gas piping has been completed.
There is an expansion of the t
u
be
w
ith each firing
cycle. This
w
ill ca
u
se the b
u
rner to move
w
ith respect
to the gas line. This can ca
u
se a gas leak res
u
lting in
an
u
nsafe condition if the gas connection is not made
strictly in accordance
w
ith
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 line
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, the local gas
s
u
pplier
w
ill
u
s
u
ally help in planning the gas piping.
Gas lines m
u
st meet applicable codes:
United States:
The Flexible Stainless Steel Gas
Hose (US models) s
u
pplied
w
ith the heater is
certified per the Standard for Connectors for Gas
Appliances, ANSI Z21.24/CSA 6.10 - latest revision.
Canada:
The R
u
bber Type 1 Gas Hose (Canadian
models) optional
w
ith the heater 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.
• Check the pipe and tubing ends for leaks
before placing heating e
q
uipment into
service. When checking for gas leaks, use a
soap and water solution; never use an open
flame.
WARNING
Explosion Hazard
Leak test all components of
g
as pipin
g
before operation.
Gas can leak if pipin
g
is not installed
properly.
Do not hi
g
h pressure test
g
as pipin
g
with
heater connected.
Failure to follow these instructions can result
in death, injury or property dama
g
e.
