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gas valve
cap
Manual Main Shut−off Valve Will Not Hold Test
Pressures in Excess of 0.5 PSIG (14 in. w.c.)
Figure 6
unit
Isolate Gas Valve To Pressure Test
NOTE − Codes may require that manual main shut off valve
and union (furnished by installer) be installed in gas line exter
nal to unit. Union must be of the ground joint type.
Danger of explosion. Can cause injury or
product or property damage. Do not use
matches, candles, flame or other sources
of ignition to check for leaks.
WARNING
!
After gas piping is complete, carefully check all piping con
nections (factory and field) for gas leaks. Use soap solution
or other preferred means.
NOTE − In case of emergency shutdown, shut off main
manual gas valve and disconnect main power to unit.
These devices should be properly labeled by installer.
The heating value of the gas may differ with locality. The
value should be checked with the local gas utility.
NOTE − Units are shipped equipped for natural gas, but can
be converted to LPG/propane with a conversion kit.
NOTE − There may be a local gas utility requirement speci
fying a minimum diameter for gas piping. All units require a
1/2 inch pipe connection at the gas valve.
Gas piping recommendations:
1 − A drip leg and a ground joint union must be installed in
the gas piping.
A ground joint union is recommended by the man
ifold/valve.
2 − When required by local codes, a manual shutoff valve
may have to be installed outside of the unit.
3 − Use pipe thread sealing compound resistant to pro
pane gas sparingly on male threads.
4 − The gas supply should be a separate line and installed
in accordance with all safety codes. After the gas con
nections have been completed, open the main shutoff
valve admitting normal gas pressure to the mains.
Check all joints for leaks with soap solution or other
material suitable for the purpose.
CAUTION
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly af
ter leak test has been completed. Do not use
matches, candles, flame or other sources of ignition
to check for gas leaks.
5 − The furnace and its individual manual shutoff valve
must be disconnected from the gas supply piping sys
tem during any pressure testing of that system at test
pressures in excess of 1/2 PSIG (3.48kPa).
IMPORTANT
The furnace must be isolated from the gas supply
piping system by closing its individual manual shut−
off valve during any pressure testing of the gas sup
ply piping system at test pressures equal to or less
than 1/2 psig. See figure 6.
The furnace and its individual shut−off valve must be
disconnected from the gas supply piping system
during any pressure testing of the system at test
pressures greater than 1/2 psig.
6 − A 1/8 inch N.P.T. plugged tapping, accessible for test
gage connections, must be installed immediately up
stream of the gas supply connection to the furnace.
LPG/Propane Units, Tanks, & Piping
Check the unit rating plate for type of gas that unit is
equipped for. If conversion is required use the approved
conversion kit. The unit may be converted in the field for
use with LPG/propane gas with accessory kit by an
approved licensed pipe fitter or technician.
All LPG/propane gas equipment must conform to the safety
standards of the National Fire Protection Association.
For satisfactory operation, LPG/propane gas pressure must
be a minimum of 11 inches W.C. at the unit under full load.
Complete information regarding tank sizing for
vaporization, recommended regulator settings, and pipe
sizing is available from most regulator manufacturers and
LPG/propane gas suppliers.
Check all connection for leaks when piping is completed,
using a soapy solution.
Electrical
ALL WIRING SHOULD BE DONE IN ACCORDANCE
WITH NATIONAL ELECTRIC CODE, ANSI/NFPA No. 70
(LATEST EDITION), IN CANADA CSA C22.2 Part 1
(LATEST EDITION), OR WITH LOCAL CODES, WHERE
THEY PREVAIL.
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