31
Disconnect this unit and shuto valve from the gas supply
piping system before pressure testing the supply piping
system with pressures in excess of 1/2 psig (3.48 kPa).
Isolate this unit from the gas supply piping system by closing
its external manual gas shuto valve before pressure testing
supply piping system with test pressures equal to or less than
1/2 psig (3.48 kPA).
T
O
AVOID
THE
POSSIBILITY
EXPLOSION
OR
,
NEVER
USE
A
OR
OPEN
TO
TEST
LEAKS
I
THE
IS
INSTALLED
IN
A
,
AN
EXCAVATED
AREA
OR
SPACE
,
IT
IS
TO
CONTACT
A
PROPANE
SUPPLIER
TO
INSTALL
A
DEVICE
IN
CASE
A
LEAK
S
INCE
PROPANE
IS
HEAVIER
THAN
AIR
,
ANY
CAN
SETTLE
IN
ANY
AREAS
OR
SPACES
P
ROPANE
ODORANT
,
THE
UNDETECTABLE
EXCEPT
A
DEVICE
•
•
A gas detecting warning system is the only reliable way
to detect a propane gas leak. Rust can reduce the level
of odorant in propane gas. Do not rely on your sense
of smell. Contact a local propane gas supplier about
installing a gas detecting warning system. If the presence
of gas is suspected, follow the instructions listed in the
Safety Considerations section of this manual.
All propane gas equipment must conform to the safety
standards of the National Board of Fire Underwriters,
NBFU Manual 58.
CANADA: National Standard of Canada, Natural Gas and
Propane Installation Code (NSCNGPIC) CSA B149.1-15.
Maximum
Continuous
For satisfactory operation, propane gas pressure must be
10” WC at the furnace manifold with all gas appli ances in
operation. Maintaining proper gas pressure depends on
three main factors:
1. Vaporization rate, depending on temperature of the
liquid, and “wetted surface” area of the con tainer or
containers.
2. Proper pressure regulation. (Two-stage regulation is
recommended for both cost and eciency).
3. Pressure drop in lines between regulators, and
between second stage regulator and the appliance.
Pipe size will depend on length of pipe run and total
load of all appliances.
Complete information regarding tank sizing for vaporiza-
tion, recommended regulator settings, and pipe sizing is
available from most regulator manufacturers and propane
gas suppliers.
Since propane gas will quickly dissolve white lead and
most standard com mercial compounds, special pipe dope
must be used. Always use a pipe thread sealant approved
for all gases.
Refer to the illustration for typical propane gas
installations and piping.
N
EVER
THE
PRODUCTS
,
CARBON
,
TO
ENTER
THE
RETURN
DUCT
OR
CIRCULATION
AIR
SUPPLY
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