MG3P Installation Manual

23
GAS SUPPLY & PIPING
WARNING:
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could
result in serious injury, death or property
damage.
• Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
• Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the fire department.
AVERTISSEMENT :
RISQUE D’INCENDIE OU D’EXPLOSION
• Le non-respect des avertissements de sécurité
pourrait entraîner des blessures graves, la mort
ou des dommages matériels.
• L’installation et l’entretien doivent être effectués
par un installateur qualifié, un organisme de
service ou le fournisseur de gaz.
• Ne pas entreposer ni utiliser de l’essence ni
d’autres vapeurs ou liquides inflammables dans le
voisinage de cet appareil, ni de tout autre appareil.
QUE FAIRE S’IL Y A UNE ODEUR DE GAZ
• Ne tentez pas d’allumer quelque appareil que
ce soit.
• Ne touchez à aucun interrupteur électrique;
n’utilisez pas de téléphone dans votre immeuble.
• Évacuer l’immeuble immédiatement.
• Appelez immédiatement votre fournisseur de
gaz à l’aide du téléphone d’un voisin. Suivez les
directives données par le fournisseur de gaz.
• Si vous ne pouvez pas joindre le fournisseur de
gaz, appelez les pompiers.
• All gas piping must be installed in compliance with
local codes and utility regulations. In the absence of
local codes the gas line installation must comply with
the latest edition of the National Fuel Gas Code (ANSI
Z223.1) or (CAN/CGA B149.1 or .2) Installation Codes.
• Some local regulations require the installation of a manual
main shut-off valve and ground joint union external to the
furnace. The shut-off valve should be readily accessible
for service and/or emergency use. Consult the local utility
or gas supplier for additional requirements regarding
placement of the manual main gas shut-off.
• Per ANSI 21.47, A 1/8-inch NPT plugged tapping,
accessible for test gauge connection, must be installed
immediately upstream of the gas supply connection to
the furnace external to the cabinet. If local codes allow
the use of a flexible gas appliance connector, always use
a new listed connector. Do not use a connector that has
previously serviced another gas appliance.
• Gas piping must never run in or through air ducts,
chimneys, gas vents, or elevator shafts.
• Compounds used on threaded joints of gas piping must
be resistant to the actions of liquefied petroleum gases.
• The main gas valve and main power disconnect to the
furnace must be properly labeled by the installer in case
emergency shutdown is required.
• Flexible gas connectors are not recommended for this
furnace but may be used if allowed by local jurisdiction.
Only new flexible connectors may be used. DO NOT reuse
old flexible gas connectors.
• A drip leg should be installed in the vertical pipe run to
the unit. See Figure 35 (page 25).
This furnace may be installed for either left or right side gas
entry. When connecting the gas supply, provide clearance
between the gas supply line and the entry hole in the furnace
casing to avoid unwanted noise and/or damage to the furnace.
Typical gas service hookup for upflow and downflow furnaces is
shown in Figure 35 (page 25). Table 15 (page 47) lists gas
flow capacities for standard pipe sizes as a function of length in
typical applications based on nominal pressure drop in the line.
Leak Check
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Never test for gas leaks with an open flame.
Use a commercially available soap solution
made specifically for the detection of leaks
to check all connections. A fire or explosion
may result causing property damage, personal
injury or loss of life.
AVERTISSEMENT :
RISQUE D’INDENDIE OU D’EXPLOSION
Le non-respect des avertissements de sécurité
pourrait entraîner des blessures graves, la mort ou
des dommages matériels.
Ne jamais utiliser une flamme nue pour vérifier la
présence de fuites de gaz. Pour la vérification de tous
les joints, utiliser plutôt une solution savonneuse
commerciale fabriquée spécifiquement pour la
détection des fuites de gaz. Un incendie ou une
explosion peut entraîner des dommages matériels,
des blessures ou la mort.
After the gas piping to the furnace is complete, all connections
must be tested for gas leaks. This includes connections at