Safety Devices; Clearance To Combustibles; Locating The Unit; Gas Supply Pressures - Majestic FSUV20 Installation And Homeowners Operating Instructions

Safety Devices

Adequate combustion and ventilation air must be pro-
vided. The flow of combustion and ventilation air MUST
NOT be obstructed.
Provide adequate clearances around the air opening
into the combustion chamber and adequate accessibili-
ty clearance for servicing and proper operation. NEVER
obstruct any opening of the heater.
This heater is equipped with a pilot system featuring an
Oxygen Depletion Sensor (O.D.S.) shut-off device. All
unvented heaters are required to have this system. The
O.D.S. pilot will shut down the heater when there is no
provision for adequate combustion air.
Report any parts damaged in shipment to your dealer.

Clearance to Combustibles

Adequate clearances as listed below must be
maintained for servicing and proper operation:
Leave at least 36" clearance from front of heater to
combustibles.
f i r e - p a r t s . c o m
*Side ........................................................................ 12"
Combustible Floor ...................................................... 0"
Top ............................................................................ 36"
Back ........................................................................... 1"
Corner ...............................................0" to Back Edges

Locating the Unit

Fig. 2 Locating unit.
A) *Flat on wall corner
C) Island
E) Flat on wall
* A & B must maintain a 12"(305 mm) clearance
between the wall and side of window frame of fireplace.
** When placing the fireplace against a wall maintain
a minimum of 1" clearance between wall and back of
fireplace.
10001784
HS113
B) *Room divider
locating unit
D) Cross corner
12/02
This heater must be isolated from the gas supply piping
system by closing its individual manual shut-off valve
during any pressure equal to or less than 1/2 psig (3.45
kPa).
The heater and its individual shut-off 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 psig (3.45 kPa).
Minimum Inlet Pressure
Maximum Inlet Pressure
Manifold Pressure
The installation of your Fireplace must conform
with local codes, or in the absence of local codes,
with National Fuel Gas Code, ANSI Z223.1/NFPA
54 latest edition.
(EXCEPTION: Do not derate this appliance for
elevations up to 4,500 ft. (1,370m). Maintain the
manifold pressure at 3.5" w.c. for Natural Gas
and 10" w.c. for LP gas)
Input ratings are shown in BTU per hour and are
certified without deration from elevations up to
4,500 feet (1,370m) above sea level.
Nuisance outages may occur at altitudes above
4,500 feet (1,370m) if dirt, dust, lint and/or cob-
webs are allowed to accumulate on burner and/or
ODS pilot. Monthly inspection and cleaning is
recommended for altitudes above 4,500 feet
(1,370m)
For elevations above 4,500 feet (1,370m), instal-
lations must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having
jurisdiction.
HS113
Model
FSUV20RN
FSUV20RP
FSUV30RN
FSUV30RP
Units: U41AM0, U41BM0,
FSUV20/30 Vent Free Gas Heater

Gas Supply Pressures

Natural Gas
5.5" w.c.
14.0" w.c.
3.5" w.c.

High Elevations

Gas Specifications
Fuel Gas Control
Natural Millivolt Hi/Lo
Propane Millivolt Hi/Lo
Natural Millivolt Hi/Lo
Propane Millivolt Hi/Lo
FSUV20 / FSUV30
Certified To
ANSI Z 21.11.2a-2003
Unvented Room Heaters
LP
11.0" w.c.
14.0" w.c.
10.0" w.c.
Max. Min.
Input Input
B.T.U.H. B.T.U.H.
25,000 17,500
25,000 18,750
35,000 24,500
35,000 26,250
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