Installation Guide

24
After the gas piping to the furnace is complete, all
connections must be tested for gas leaks. This includes
pipe connections at the main gas valve, emergency
shutoff valve and flexible gas connectors (if applicable).
The 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.
IMPORTANTNOTE:Whenpressuretestinggassupply
linesatpressuresgreaterthan1/2psig(14inchW.C.),
thegassupplypipingsystemmustbedisconnected
fromthefurnacetopreventdamagetothegascontrol
valve.Ifthetestpressureislessthanorequalto1/2
psig(14inchW.C.),closethemanualshut-offvalve.
HighAltitudeApplication
High altitude conversion with this furnace depends on
the installation altitude and the heating value of the gas.
Installation of this furnace at altitudes above 2,000 feet
shall be in accordance with local codes, or in the absence
of local codes, the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 or National Standard of Canada, Natural Gas &
Propane Installation Code CGA B149.1. Please consult
your local code authority.
WARNING:
Thereductionofinputratingnecessaryforhigh
altitudeinstallationmayonlybeaccomplished
withfactorysuppliedorices.Donotattemptto
drilloutoricesintheeld.Improperlydrilled
orices may cause re, explosion, carbon
monoxidepoisoning,personalinjuryordeath.
The furnaces are shipped from the factory with orifices
and gas regulator settings for natural gas operation at sea
level altitudes. At 2000 feet, the NFGC requires that this
appliance be derated 4% for each 1000 feet of altitude.
InstallationExample
Elevation: .................................................. 5,000 feet
TypeofGas: ...........................................Natural Gas
LocalHeatingValueofGas: .............................. 750
From Table 13, find 750 and follow down the column,
stop at the 5,000 feet row. The heating value listed is
LOW. Table 15 will be used to determine orifice size
and manifold pressure.
For example, the input needs to be reduced 8% at 2,000
feet, 12% at 3,000 feet, etc. This deration is in reference
to the input rate and gas heating value at sea level.
To derate the furnace requires knowing the heating
value of the gas at the installation site. Heating values at
particular job sites vary for two reasons:
1. The chemical mixture of the gas varies across regions
and is expressed as the “sea level heating value”.
2. The heating value varies by altitude. For this reason,
especially in high altitude areas, the local gas utility
specifies the heating value at the residence’s gas meter
as the “local value”.
For added flexibility, two tables have been provided for
natural gas installations with high or low heating values at
sea level. Tables 14 & 15 (page 42) contain the manifold
pressure and orifice sizes to use at various altitudes. Table
14 (HIGH) is for natural gas installations with a heating
value of more than 1,000 Btu per cubic foot and Table
15 (LOW) is for less than 1,000 Btu per cubic foot. To
determine which table to use:
1. Consult the local utility for the local heating value at
your installation site.
2. From Table 13 (page 41), find your local heating value
as supplied by the utility company. Follow down the
column and stop at your altitude level.
3. If your sea level heating value is HIGH, use Table 14
or if it’s LOW, use Table 15. See example below.
After changing the regulator pressure or the orifices, it is
required that you measure the gas input rate. This may be
accomplished in the usual way, by clocking the gas meter
and using the local gas heating value. See Verifying and
Adjusting the Input Rate section (page 30).
IMPORTANTNOTE:Observetheactionoftheburners
tomakesurethereisnoyellowing,liftingorashback
oftheame.
RISQUED’INDENDIEOUD’EXPLOSION
Lenon-respectdesavertissementsdesécurité
pourraitd’entraînerdesblessuresgraves,la
mortoudesdommagesmatériels.
Ne jamais utiliser une flamme nue por
vérierla présence desfuitesdegaz.Pour
la vérication de tous les joints, utiliser
plutôtunesolutionsavonneusecommerciale
fabriquéespéciquementpurladétectiondes
fuitesdegaz.Unincendieouuneexplosion
peutentraînerdesdommagesmatériels,des
blessuresoulamort.
AVERTISSEMENT: