NOTE: DIAGRAMS AND ILLUSTRATIONS ARE REPRESENTATIVE AND ARE NOT DRAWN TO SCALE.
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11
gAS fLEx LINE
The flexible gas line connector (“flex line”)
provided with the fireplace assembly (Figure
11-3) is for use in connecting the unit to the
gas supply line. (See Figure 36 for flex line
description.)
The provided flex line is rated for use with
either natural gas or propane.
Use of a flex-line connector is acceptable in
the U.S.A., where local codes permit; how-
ever, Canadian requirements vary depending
on locality.
Note: Flex-line installation must
be in compliance with local codes.
gAS LINE SHUTOff VALVE
The gas line shutoff valve provided with the
fireplace has a 1/2" NPT thread inlet port.
Building and plumbing codes require a gas
line shutoff valve mounted in the supply line.
The provided gas line shutoff valve
( located in the control compart-
ment under the fireplace floor)
is intended as a service shutoff.
National and local codes may re-
quire installation of a second gas
line shutoff valve (not provided)
in a readily accessible location.
Consult local codes.
Figure 11-2
[TOP VIEW, WITH FLOOR KIT REMOVED]
ON
OFF
Control Access Panel
Burner Assembly
____________
*Switches from intermittent ignition to standing pilot mode.
ON
OFF
CPI/IPI Switch*
(ON = Standing;
Off = Intermittent)
Main gas Shut-Off Valve
[DETAIL/CUTAWAY, WITH BURNER AND CONTROL ACCESS PANEL REMOVED]
LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODEL RHAP54N) • INSTALLATION INSTRUCTIONS
Note: The gas supply line must be installed in accordance with
building codes by a qualified installer approved and/or licensed as
required by the locality. In the Commonwealth of Massachusetts,
installation must be performed by a licensed plumber or gas fitter.
Figure 11-3
Gas
Stub
1/2" x 3/8" Flare
Shut-Off Valve
3/8" Flex Tubing
3/8" NPT x 3/8
"
Flare Fitting
Gas
Valve
Flex Line Connector
gAS REqUIREMENTS/CONNECTION
(CONTINUEd)
BURNER ORIfICE SIZES
Sea Level to High Altitude
These appliances are tested and approved
for installation at elevations of 0–4500 feet
(0–1372 meters) above sea level using the
standard burner orifice sizes (marked with an
asterisk [*] in Figure 11-1). For elevations
above 4500 feet, contact your gas supplier or
qualified service technician.
derating gas Input
At higher elevations, the amount of BTU fuel
value delivered must be reduced by either:
• using gas that has been derated by the gas
company; or
• changing the burner orifice to a smaller size
as regulated by the local authorities having
jurisdiction or by the (USA) National Fuel
Gas Code NFPA 54/ANSI Z223.1, latest
edition, or, in Canada, the CAN/CSA-B149.1
codes, latest edition.
Install the appliance according to the regulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
54 / ANSI Z223.1, latest edition, or , in Canada,
the CAN/CSA-B149.1, latest edition.
NOTE: Flame appearance may vary at
higher altitudes.
BURNER ORIfICE SIZES
Elevation 0–4500 ft (0–1372 m)
fireplace
Model
Natural gas
drill Size (inches)
Propane
drill Size (inches)
RHAP54N
#32 (.116")*
#51 (.067")*
*Standard size installed at factory (see
“Installation Accessories” in the back of this
manual for catalog numbers).
Figure 11-1
CPI/IPI SWITCH (INTERMITTENT/
STANdINg PILOT MOdES)
The electronic system is switchable between
standing and intermittent pilot modes (see
Figure 11-2).
