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18
High Altitude Adjustment
When installing the GF 600 DV Firelight gas stove in
high altitude situations (above 2500') it becomes
necessary to compensate for the thinner air (less
volume of oxygen per cubic foot). High altitudes
affect the atmospheric pressure and heat value of
gaseous fuels. Lower oxygen content in the air and
lower gas viscosity require the use of a different
orifice to achieve efficient, clean combustion at the
burner tube.
In the U.S.,
THE DERATING KIT MUST BE INSTALLED BY AN
AUTHORIZED SERVICE TECHNICIAN IN ACCOR-
DANCE WITH THE MANUFACTURER’S INSTRUC-
TIONS AND ALL CODES AND REQUIREMENTS OF
THE AUTHORITY HAVING JURISDICTION. THE
INFORMATION STICKER MUST BE FILLED OUT BY
THE INSTALLER AND ADHERED TO THE APPLIANCE
AT THE TIME OF THE CONVERSION. THE QUALIFIED
SERVICE AGENCY PERFORMING THIS WORK AS-
SUMES RESPONSIBILITY FOR THIS DERATING.
In Canada,
This unit has been tested for installation at high
altitudes in accordance with Canadian test stan-
dard CAN/CGA-2.17.
THE DERATING SHALL BE CARRIED OUT IN ACCOR-
DANCE WITH THE REQUIREMENTS OF THE PROVIN-
CIAL AUTHORITIES HAVING JURISDICTION AND IN
ACCORDANCE WITH THE REQUIREMENTS OF THE
CAN1-B-149.1 AND .2 INSTALLATION CODE.
For installations from 610 - 1370 meters (2,000-
4,500 ft.) the orifice size is 3.3 mm for natural gas
and #48 mm for propane.
SEE THE HIGH ALTITUDE ORIFICE CHART on the
page 19. For high altitude installations, consult your
local gas distributor or the authority having juris-
diction for proper rating methods. If the installer
must convert the unit to adjust for varying alti-
tudes, the information sticker must be filled out by
the installer and applied to the appliance at the
time of the conversion.
The appliance and its main gas valve must be
disconnected from the gas supply piping system
during any pressure testing on that system at test
pressures in excess of 1/2 psig (3.5kPa).
The appliance must be isolated from the gas
supply line by closing its individual manual gas
shut-off valve (gas cock) during any pressure
testing of the gas supply piping system that is
equal to or exceeds pressures of 1/2 psig (3.5kPa).
MANIFOLD PRESSURES
MIN MAX
NATURAL GAS 1.7WC 3.5 WC
PROPANE 6.4 WC 10.0 WC
ATTENTION:
NEVER ALLOW THE INLET GAS PRES-
SURE TO EXCEED 13.5” WC
(OR 1/2”PSIG) AS SERIOUS DAMAGE
TO THE VALVE CAN RESULT.