NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10
gENERAL gAS INfORMATION
ANd IMPORTANT NOTICES
•
It is critical that a licensed instal ler
perform these steps strictly per NFPA
54
.
Installing a gas supply line from the fuel
supply to the appliance involves numerous
considerations, including materials, protec-
tion, sizing, location, controls, pressure,
sediment, and more.
•
Gas-lines must be routed, constructed, and
made of materials that are in strict accord-
ance with local codes and regulations.
Check with local building officials for local
code requirements.
•
Never use galvanized or plastic pipe.
•
A sediment trap (not provided) is recom-
mended in the gas piping within the home to
prevent moisture and debris in the line from
damaging the valve.
•
Where required, tightly secure all joints
using appropriate pipe wrenches and seal-
ing compounds.
•
On threaded joints, use a pipe joint com-
pound rated for gas. Always use propane-
resistant compounds in propane applica-
tions. Make sure pipe joint compound
does NOT get inside the pipe.
•
Optional: Seal around the gas-line to pre-
vent cold air leakage. gas-line holes and
other openings can be caulked or stuffed
with unfaced fiberglass insulation.
IMPORTANT NOTICE REgARdINg
PROPANE INSTALLATIONS
Propane tanks are at pressures that will
cause damage to valve components.
Verify that the tanks have step-down regu-
lators to reduce pressures to safe levels.
Using a propane tank smaller than
100 lbs may create pressure loss and
insufficient fuel delivery, which can cause
sooting, severe delayed ignition, or other
malfunctions (ref. NPfA 58).
Any damage as a result of insufficient tank
size or other improper installation is NOT
covered under the limited warranty.
The appliance and its appliance main gas
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
equipment shutoff valve during any pres-
sure testing of the gas supply piping system
at test pressures equal to or less than 1/2
psi (3.5 kPa).
Orange Wire
(from dfC Wire
Harness)
Pressure Regulator
Tower
Main gas Inlet
3/8" NPT
green Wire
(from dfC Wire Harness)
Inlet (IN) Test Port
Manifold (OUT) Test Port
Connect GTMS
wire harness.
yellow ground Wire
(from dfC Wire Harness)
Figure 13: SIT Proflame Gas Valve
LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODELS RHAP42N & RHAP54N) • INSTALLATION INSTRUCTIONS
gAS REqUIREMENTS
ANd CONNECTION
Figure 14
External gas Valve
Test Ports (1/8" NPT)
glass door Assembly
(Lower Right Corner)
Inlet (IN)
Manifold (OUT)
Air Shutter
Adjustment Lever
gAS SUPPLy PRESSURE
REqUIREMENTS
MANIfOLd gAS SUPPLy PRESSURE
fuel Type
Low
High
Natural gas
1.6" WC
(0.4 kPa)
3.5" WC
(0.87 kPa)
Propane
6.3" WC
(1.57 kPa)
10.0" WC
(2.49 kPa)
Table 3
INLET gAS SUPPLy PRESSURE
fuel Type
Minimum
Maximum
Natural gas
5.0" WC
(1.24 kPa)
10.5" WC
(2.61 kPa)
Propane
11.0" WC
(2.74 kPa)
13.0" WC
(3.23 kPa)
INPUT RATES (BTU/hr)
fireplace
Model
Natural gas
Propane
(field-converted)
RHAP42
27,000 high
19,500 low
25,000 high
19,500 low
RHAP54
37,000 high
26,000 low
34,000 high
27,000 low
Table 4
INPUT RATES
gAS VALVE ANd TEST PORT
INfORMATION
The SIT Proflame gas valve in this fireplace
has a 3/8" NPT thread main gas inlet and outlet
(
Figure 13
)
.
Test gauge connections are provided on the
front of the gas control valve (identified IN for
the inlet and OUT for the manifold side). To
access the pressure taps on the valve, remove
the four (4) screws in the access plate below
the burner
(see
Figure 15
)
.
A set of external 1/8" NPT test ports is also
provided just below the glass door, to the right
of center
(
Figure 14
). If installed, remove the
optional Bezel (
Page 29
) and Surround (
Page
33
) to access the ports.
Note: Before accessing test ports,
fireplace must be OFF and COLD.
Turn OFF main gas supply before
connecting to pressure taps.
