Nortek R6GF Series, Руководство по установке

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15
Pressure Adjustment section ( page 18 ) for adjustment
instructions.
• Gas piping must never run in or through air ducts,
chimneys, gas vents, or elevator shafts.
• Compounds used to seal joints on gas piping must be
resistant to the actions of LP propane gas.
• The main gas valve and main power disconnect to the
furnace must be properly labeled by the installer in case
emergency shutdown is required.
• An 1/8 inch NPT plugged tap must be installed in the gas
line immediately upstream of the gas supply connection
to the furnace for use when measuring the gas supply
pressure. The plug should be readily accessible for
service use.
• A drip leg should be installed in the vertical pipe run to
the unit (
Figure 7
).
This unit only has right side gas entry. When connecting the
gas, provide clearance between the gas supply line and the
entry hole in the unit’s casing to avoid unwanted noise and/
or damage to the unit. A typical gas service hookup is shown
in
Figure 7 .
Table 12 (page 25) lists gas pipe 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
Si les consignes de sécurité ne sont pas suivies à la
lettre, cela peut entraîner la mort, de graves blessures
ou des dommages matériels.
Ne jamais vérifier la présence de fuites de gaz au
moyen d’une flamme nue. Vérifier tous les raccords en
utilisant une solution savonneuse commerciale conçue
spécialement pour la détection de fuites. Un incendie
ou une explosion risque de se produire, ce qui peut
entraîner la mort, des blessures ou des dommages
matériels.
After
the gas piping to the unit is complete, all connections
must be tested for gas leaks. This includes pipe connections
at the main gas valve, emergency shutoff valve and other
gas connectors. A soap and water solution can be applied on
each joint or union using a small paintbrush. If any bubbling is
observed, the connection is not sealed adequately and must
be retightened. Repeat the tightening and soap check process
until bubbling ceases.
Ground
Joint
Union
Dripleg
Shut-Off Valve
with 1/8 NPT
plugged tap
Burner
Assembly
Manifold
Some utilities
require Shut-Off
Valve to be
4 to 5 feet
above floor
Automatic Gas Valve
(with manual shut-off)
Figure 7. Typical Gas Hookup - Right Side Entry
• If pressure testing the gas supply lines at pressures
greater than 1/2 psig (14 inches WC), the unit must be
disconnected from the gas supply piping system to
prevent damage to the gas valve.
• If the test pressure is less than or equal to 1/2 psig
(14 inches WC), the unit must be isolated from the gas
supply line by closing the manual shut-off valve.
High Altitude Conversion
Conversion of this unit must be performed by qualified service
personnel, using only approved parts. All installations must be
made in accordance with the National Fuel Gas Code and/or
local jurisdiction codes.
High altitude conversion can be field performed by a simple
adjustment of manifold pressure or a change of the orifices (if
necessary) as described on
page 18 . The changes required
depend on the installation altitude and the heating value of
the gas (based on sea level) which can be obtained from your
local gas utility. The heating value of gas at high altitude is
always lower than the sea level heating value. The heating
values listed in
Table 5 & Table 6 (page 16) are based on
sea level values.
WARNING:
The reduction of input rating necessary for high
altitude installation may only be accomplished with
factory supplied orifices. Do not attempt to drill out
orifices in the field. Improperly drilled orifices may
cause fire, explosion, carbon monoxide poisoning,
personal injury or death.
If installing this unit above 2,000 feet, the input rate must be
reduced 4% per 1,000 feet of altitude (Example: 12% at 3,000
feet, 16% at 4,000 feet, etc).
NOTE:
Deration is necessary to
compensate for low atmospheric pressure at high altitudes.
For altitudes between 5,000 and 10,000 feet above sea level,
the unit can be converted by changing the orifice and adjusting
the furnace manifold pressure. See
Table 5 for the correct
orifice and manifold pressure setting. NOTE: Each unit has
specific orifices.