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LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODELS RHAP42N & RHAP54N) • INSTALLATION INSTRUCTIONS
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 Table 5). 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/CGA-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/CGA-B149.1, latest edition.
NOTE: Flame appearance may vary at
higher altitudes.
BURNER ORIfICE SIZES
Elevation 0 – 4500 ft (0 – 1372 m)
fireplace
Natural gas
Model
drill Size (inches)
drill Size (inches)
#40 (.098")*
#54 (.055")*
RHAP42N
#32 (.116")*
#51 (.067")*
RHAP54N
*Standard size installed at factory (see
"Installation Accessories" in the back of this
manual for catalog numbers).
Table 5
In Canada - CAN/CgA-2.17-M91 (R2009)
(high altitude):
THE CONVERSION SHALL BE CARRIEd OUT
By A MANUfACTURER'S AUTHORIZEd REP-
RESENTATIVE, IN ACCORdANCE WITH THE
REqUIREMENTS Of THE MANUfACTURER,
PROVINCIAL OR TERRITORIAL AUTHORITIES
HAVINg jURISdICTION ANd IN ACCORdANCE
WITH THE REqUIREMENTS Of THE CAN/CgA-
B149.1 OR CAN/CgA-B149.2 INSTALLATION
COdES.
CPI/IPI SWITCH (INTERMITTENT/
STANdINg PILOT MOdES)
The electronic system is switchable between
standing and intermittent pilot modes (see
Figure 15).
gAS fLEx-LINE
The flexible gas-line connector ("flex-line")
provided with the fireplace assembly (Figure
16) is for use in connecting the unit to the
gas supply line. (See Figure 16 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.
[TOP VIEW, WITH FLOOR KIT REMOVED]
fireplace front
[DETAIL/CUTAWAY, WITH BURNER AND CONTROL ACCESS PANEL REMOVED]
Propane
____________
*Switches from intermittent ignition to standing pilot mode.
Figure 15
Gas
Stub
Figure 16
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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.
Control Access Panel
Main gas Shut-Off Valve
Flex Line Connector
3/8" NPT x 3/8"
1/2" x 3/8" Flare
Flare Fitting
Shut-Off Valve
3/8" Flex Tubing
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.
The provided gas-line shutoff valve
( located in the control compart-
ment under the fireplace floor) is
intended as a service shutoff. Na-
tional and local codes may require
installation of a second gas-line
shutoff valve (not provided) in a
readily accessible location. Con-
sult local codes.
Burner Assembly
CPI/IPI Switch*
(ON = Standing;
Off = Intermittent)
Gas
Valve
11
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