Lennox Hearth SHGL-18MP-R - Manual (Page 3)

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 3
• Do not install the appliance in a bedroom or
bathroom.
• The installation must conform with local
codes or, in the absence of local codes with the
National Fuel Gas Code, ANSI Z223.1.
• The appliance and its individual shut-off valve
must be disconnected from the gas supply
piping system while performing any tests of the
gas supply piping system at pressures in ex-
cess of
¹⁄₂ psig.
• The appliance must be isolated from the gas
supply piping system by closing its individual
manual shut-off valve during any pressure test-
ing of the gas supply piping system at test
pressures equal to or less than
¹⁄₂ psig.
• Keep appliance area clear and free from
combustible materials, gasoline and other flam-
mable vapors and liquids.
• Do not use this appliance if any part has been
under water. Immediately call a qualified ser-
vice technician to inspect the appliance and to
replace any part of the control system and any
gas control which has been under water.
• Input ratings are shown in BTU per hour and
are for elevations up to 2,000 feet. Do not install
this appliance at an elevation above 2,000 feet
unless the gas supply has been derated for that
elevation. Consult your local gas supplier. (If
the gas supply has not been derated, the burner
orifice must be derated at the rate of 4% for
each 100 feet above sea level).
• Ensure that the appliance is clean when
operating. Excessive dust accumulation on the
burner and/or logs will increase the amount of
carbon monoxide formation and could lead to
the formation of soot, carbon monoxide poi-
soning and sickness or death.
CODES
Adhere to all local codes or in their absence the
latest edition of The National Fuel Gas Code
ANSI Z223.1 or NFPA54 which can be obtained
from The American National Standards Insti-
tute, Inc. (1430 Broadway, New York, NY,
10018) or National Fire Protection Association,
Inc. (Batterymarch Park, Quincy, MA, 02269).
State or local codes may only allow operation of
this appliance (manual version only) in a vented
configuration. Check your state or local codes.
Seller of unvented propane or natural gas-
fired supplemental room heaters shall pro-
vide to each purchaser a copy of 527 CMR 30
upon sale of the unit.
Rooms communicating directly with the space
in which the appliances are installed, through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
Unusually tight construction is defined as con-
struction where:
a. wall and ceilings exposed to the outside
atmosphere have a continuous water vapor
retarder with a rating or one perm or less with
openings gasketed or sealed, and
b. weather stripping has been added on oper-
able windows and doors, and
c. caulking or sealants are applied to areas
such as joints around window and door frames,
between sole plates and floors, between wall-
ceiling joints, between wall panels, at penetra-
tions for plumbing, electrical, and gas lines,
and at other openings.
Use the following equations to determine if
you have a confined or unconfined space.
1. Determine the volume of space — ft 3 .
Length x Width x Height = _____ ft 3
(Include adjoining rooms with doorless pas-
sageways or ventilation grills between rooms.)
Example: 24' (L) x 16' (W) x 8' (H) = 3072 ft 3
2. Divide the volume of space by 50 ft 3 to
determine the maximum BTU/Hr the space
can support.
______ (volume of space – ft 3 )/ 50 ft 3 =
(Maximum BTU/Hr the space can support)
Example: 3072 ft 3 / 50 ft 3 = 61.44
or 61,440 BTU/Hr the space can support.
3. Add the BTU/Hr of all the fuel burning appli-
ances in the space.
Vent-Free Heater _______ BTU/Hr
Gas Appliance #1* _______ BTU/Hr
Gas Appliance #2 + _______ BTU/Hr
Total = _______ BTU/Hr
Example:
Vent-Free Heater
36,000 BTU/Hr
Gas Appliance #1 35,000 BTU/Hr
(water heater)
Total = 71,000 BTU/Hr
* Do not include Direct-Vent Gas Appliances.
Direct-Vent is sealed combustion and draws
combustion air from the outdoors.
Serene Heat Gas Log appliances are certified by
OMNI-Test Laboratories to ANSI Z21.11.2 un-
vented room heaters standard. These gas log
appliances may be used as a space heat source
for a room in conjunction with an approved
unvented firebox.
Additionally, these units are design certified
by OMNI-Test Laboratories to ANSI 21.60 as a
vented gas log set.
As such, these units may be used as a vented
gas log set in any wood-burning fireplace that
has been properly constructed to code, and in
the case of factory built fireplaces, installed in
compliance with manufacturers listing and
installation instruction.
Use of the log sets covered by this manual in
a properly vented wood-burning fireplace which
has had the damper blocked open as detailed
below, preclude consideration of the combus-
tion and ventilation air and clearance to com-
bustible restrictions discussed herein.
When local codes require the damper to be
fixed open, a damper stop must be installed to
prevent full closure of the fireplace damper
and provide a minimum 29 square inch flue
opening at all times.
If damper clamp is not available, the damper
may be fixed open in the following manner.
Drill a hole in the end of the damper. Screw in
a bolt of sufficient size and adjust to provide the
minimum 29 square inches of flue opening.
COMBUSTION AND VENTILATION AIR
These heaters shall not be installed in a con-
fined space. The heater may be located in
unusually tight construction provided the
space is unconfined, or if confined, is pro-
vided with two permanent openings commu-
nicating directly with an additional room(s)
of sufficient volume so that the combined
volume of all connected spaces meets the
criteria for an unconfined space, (National
Fuel Gas Code ANSI Z223.1 (latest edition),
Section 5.3). Generally 50 ft
3 per 1,000 BTU
input of all operating appliances in the space.
The National Fuel Gas Code defines a con-
fined space as a space whose volume is less
than 50 ft
3 per 1,000 BTU/Hr (4.8 m 3 per kw)
of the aggregate input rating of all appliances
installed in that space and an unconfined
space as a space whose volume is not less
than 50 ft
3 per 1,000 BTU/Hr (4.8 m 3 per kw)
of the aggregate input rating of all appliances
installed in that space.