18
Gas Pressure
Correct gas pressure is essential for efficient and safe
operation. It is important that the correct pressure is
established at the time of the installation. Proper gas
pressure provides a consistent flow of gas to the appli-
ance and is instrumental in checking for gas leaks.
Pressure Test:
Attach a manometer to the appropriate
test point on the valve. See fig. 24. The gauge connections
are located on the front of the valve under the On/Off/
Pilot- knob. Gauge connections are identified by:
E - for Inlet or Supply Pressure (the amount of gas
coming to the valve.)
A - for Manifold Pressure (the amount of gas that is
coming out of the valve to the burner.)
ALWAYS TEST PRESSURES WITH VALVE CONTROL KNOB
SET ON HIGH.
High Altitude Adjustment
The decreased atmospheric pressure of higher altitudes
affects heat value of gaseous fuels. Most gas suppliers
derate the gas intended for use at elevations above 2000
feet. Check with your gas supplier before performing
derate adjustment to the burner.
The GF 100 DV II Nordic QT does not require adjustment
for elevations up to 4500 ft. DO NOT DERATE.
The GF 200 DV II Lillehammer may be adjusted for
altitude over 2000 ft. (610 - 1371 m). Check with your gas
supplier and, if necessary, install High Altitude Adjust-
ment Kit 155808 for Natural Gas, or Kit 155809 for
Propane.
See the chart below for appropriate orifice sizes and
part numbers.
IN THE U.S:
THE DERATING KIT MUST BE INSTALLED BY AN AUTHORIZED
SERVICE TECHNICIAN IN ACCORDANCE WITH THE
MANUFACTURER’S INSTRUCTIONS AND ALL CODES AND
REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION.
THE INFORMATION LABEL MUST BE FILLED OUT BY THE
INSTALLER AND APPLIED 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 STAN-
DARD CAN/CGA-2.17.
THE DERATING SHALL BE CARRIED OUT IN ACCORDANCE
WITH THE REQUIREMENTS OF THE PROVINCIAL AUTHORI-
TIES HAVING JURISDICTION AND IN ACCORDANCE WITH
THE REQUIREMENTS OF THE CAN1-B-149.1 AND .2 INSTALLA-
TION CODE.
For high altitude installations, consult your local gas
distributor or the authority having jurisdiction for proper
rating methods. If the appliance is converted for high
altitude, the Conversion Label, supplied with the kit, must
be filled out by the installer and applied to the appliance
at the time of the conversion. See fig. 25.
NECESSARY INLET GAS PRESSURES
(inches water column)
MIN MAX
NATURAL GAS
5.0
7.0
PROPANE
12.0
14.5
The appliance and its appliance 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 (3.5 kPa).
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 less than pressures of
1/2 psig (3.5 kPa).
MANIFOLD PRESSURES
(inches water column)
MIN MAX
NATURAL GAS
1.2
3.8
PROPANE
2.9
11.0
E
A
Figure 24. Pressure test points.
Summary of Contents for GF 100 DV II Nordic QT
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