Reznor R6GN Unit Installation Manual - Manual (Page 13)

13
Figure 9. Typical Gas Service Connection
1. All piping must comply with local codes, ordinances, and/or National Fuel Gas Codes.
2. A manual shutoff valve must be installed within 6 feet of this equipment.
3. Always include a drip leg in piping.
NOTES:
Gas Valve
Gas Valve
Riser
3 in.
Minimum
Horizontal
Drop
Piped Gas Supply Tubing Gas Supply
3 in.
Minimum
Horizontal
Drop
Gas Valve
3 in.
Min.
Riser
Piped Gas Supply
• If installing this unit above 2,000 feet, the input rate must
be reduced 4% per 1,000 feet of altitude (Example: 12%
at 3,000 feet, 16% at 4,000 feet, etc). Always round up
to the next highest value of 1,000. So an installation
at 3,120 feet is derated by 16% due to rounding up to
4,000. NOTE: This deration is necessary to compensate
for low atmospheric pressure at high altitudes. Generally
this will require obtaining the gas heating value from
the local gas utility and replacing the burner orifices.
• Tables 9 & 10 (page 34) list the correct orifice size and
high elevation conversion kit approved for this unit at
various altitudes. Use the Installation Example below
to determine the unit rating and orifice size.
• After changing the orifices, it is required that you measure
the gas input rate by clocking the gas meter and using
the local gas heating value. See Verifying & Adjusting
the Firing Rate (page 16).
IMPoRtaNt NotE! Observe the action of the burners
to make sure there is no yellowing, lifting or flashback of
the flame.
Conversion to LP/Propane
WaRNING:
The furnace was shipped from the factory
equipped to operate on natural gas. Conversion
to LP/propane gas must be performed by
qualified service personnel using a factory
supplied conversion kit. Failure to use the
proper conversion kit can cause fire, explosion,
property damage, carbon monoxide poisoning,
personal injury, or death.
INStallatIoN EXaMPlE:
Elevation: ..................................................3,890 feet
type of Gas: ..................................................Natural
Unit Model: ...................................R6GN-150C270C
At 4,000 feet, the unit needs to be derated by 4% for
each 1,000 feet of elevation. This equates to 16% or
less than the sea level rating of 270,000 Btu/h.
1. Determine unit input rating:
[270k x (100-16)%] = 226,800 Btuh. The required
heating rate for 3,890 feet is 226,800 Btu/h.
2. Determine orifice size:
From Table 9 (page 34), find the Unit Model Number.
Follow across the row and stop at the 2,000-4,000
elevation column. For this example, the orifice size
displayed is #31. Install one #31 orifice in every burner
and check firing rate. In this example, the firing rate
must not exceed 226,800 Btu/h.
In the U.S., if installing the unit above 2,000 ft., refer to
Table 10 (page 34) to determine the correct orifice size.
When conversion is complete, verify the input rate is correct
as listed in the table. Please follow the instructions
provided with each kit.
• The United States LP/Propane Gas Sea Level and High
Altitude Conversion Kit is for LP/propane conversion
in the United States at altitudes between 2,000 ft. and
7,000 ft. above sea level.
• The Canadian LP/Propane Gas Sea Level and High
Altitude Conversion Kit is for LP/propane conversions
in Canada at altitudes between zero and 4,500 ft. above
sea level.