G270 SERIES B - VENT GAS APPLIANCE
F. UTILITIES
Note: The appliance and its individual shutoff
valve must be disconnected from the gas supply
piping system during any pressure testing of that
system at test pressures in excess of 1/2 psi (3.5
kPa). The appliance must be isolated from the gas
supply piping system by closing its individual
manual shutoff valve during any pressure testing
of the gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
3. Gas Pressure.
On the Standing Pilot Millivolt Gas Control Valve, a
Pressure Tap is included on the Front Face of the
Valve. The electronic Valve includes an 1/8” NPT
Plugged Tap on the left and right of the Valve near
the outlet to the main Burner. Pressure Taps should
be located immediately upstream of the gas supply
connection and accessible for test gauge connection.
Manual Valve Ignition is not provided with Pressure
Taps.
Table 2 shows optimum gas pressure information.
Consult your local gas company for assistance in
determining the proper orifice for your altitude or refer
to ANSI Z223.1-latest edition, Appendix F.
G270
Inlet gas supply pressure (natural gas) 4.5 (min.)-7.0 (max.)*
Optimum manifold pressure (natural gas) 3.5*
Inlet gas supply pressure (LP gas) 11.0 (min.)-14.0 (max.)*
Optimum manifold pressure (LP gas) 10.5*
Input rate (natural gas) 16,500 BTU/hr
Input rate (prop. gas) 16,500 BTU/hr
Decorative - Natural Gas Orifice size .078 in/ 1.98 mm
Decorative - Propane Gas Orifice Size .046 in/ 1.16 mm
Table 2
Gas Information for Electronic and Standing Pilot Units
* Inches of water column.
2. Gas Line Connection.
Connect the Gas Line to the appliance Manual Valve
Inlet, using 3/8" pipe. To ease installation, a listed
Flexible Connector and Manual Shut-off Valve are
supplied.
Remove the Logs. Remove the screws securing the
Hearth Pan Assembly. Lift and remove the
Assembly. See Figures 8 and 9.
Run the 3/8” pipe approximately 3” into the appli-
ance. Connect a 12” to 18” Flexible Connector to the
pipe and Valve. All connections must be checked for
leaks with a soap and water solution.
Bleed the Gas Line for about 5 seconds to extract
any air that may have been trapped inside the pipe.
Place the hearth Pan Assembly and Logs back in the
appliance.
Figure 8 - Hearth Removal
Figure 9 - Gas Line Connection
1. High Altitude Installation.
For U.S. installation, units are tested and approved for eleva-
tions from 0-2000 feet. When installing this unit at an elevation
above 2000 feet, United States codes require a decrease of the
input rating by changing the existing burner orifice to a smaller
size.
Input should be reduced 4% for each 1000 feet above sea level.
Check with the local gas utility for proper orifice size identifica-
tion.
For Canada, units are certified for elevations from 0-4500 feet.
When installing this unit at an elevation between 0-4500 feet in
Canada, the input rating does not need to be reduced. When
installing this unit at an elevation above 4500 feet in Canada,
check with local authorities.
Table 2 shows optimum gas pressure information. Consult
your local gas company for assistance in determining the prop-
er orifice for your altitude or refer to ANSI Z223.1-latest edition,
Appendix F.
