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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).
NECESSARY INLET GAS PRESSURES
(inches water column)
MIN MAX
NATURAL GAS 5.0 WC 7.0 WC
PROPANE 11.0 WC 13.5 WC
NECESSARY MANIFOLD PRESSURES
(inches water column)
MIN MAX
NATURAL GAS 2.2 WC 3.5 WC
PROPANE 6.5 WC 10.0 WC
ALWAYS TEST PRESSURES WITH VALVE
CONTROL KNOB SET ON HIGH
Symptons of incorrect gas pressure include:
Insufficient gas pressure:
Small pilot flame which can result in
insufficient millivolts.
Little variation in flame picture between HI
and LO settings.
Insufficient gas to support more than one
appliance causing nusance outages or gas
surges.
Excessive gas pressure:
Permanent damage to valve causing complete
appliance shut down.
Too large a pilot flame resulting in over heating
of the power generator causing shut down.
Sooting due to impingement and/or incorrect
fuel to air mix.
HIGH ALTITUDE INSTALLATIONS:
When installing the Allagash in high altitude
(above 2000') situations it becomes necessary to
compensate for the thinner air (less volume of
air per cubic foot). Higher altitudes effect the
atmospheric pressure and heat value of gaseous
fuels. The lower oxygen content in the air and
the 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
ACCORDANCE WITH THE MANUFACTURERS
INSTRUCTIONS 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 ASSUMES
RESPONSIBILITY FOR THIS DERATING.
In Canada
THIS UNIT HAS BEEN TESTED FOR
INSTALLATION AT HIGH ALTITUDES IN
ACCORDANCE WITH CANADIAN TEST
STANDARD CAN/CGA-2.17.THE DERATING
SHALL BE CARRIED OUT IN ACCORDANCE
WITH THE REQUIREMENTS OF THE
PROVINCIAL AUTHORITIES HAVING
JURISDICTION AND IN ACCORDANCE WITH
THE REQUIREMENTS OF THE CAN1-B-149.1
AND .2 INSTALLATION CODE.
For installations from 2000ft.(610m) to
4500ft.(1370m) the orifice size for:
natural gas is a #42
propane gas is a #55
SEE THE HIGH ALTITUDE ORIFICE CHART
on page 14.
For high altitude installations consult the local
gas distributor or the authority having jurisdiction
for proper rating methods. If the installer must
convert the unit to adjust for varying altitudes,
the information sticker must be filled out by the
installer and adhered to the appliance at the time
of the conversion. See Figure 6.
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