Lennox Hearth L20 BF-2 - Manual (Page 4)

PLANNING YOUR INSTALLATION
PAGE 4
LOCAL AND NATIONAL CODE REQUIREMENTS
The installation of these appliances must conform with local
codes or, in the absence of local codes, with the National Fuel
Gas Code, (for USA) NFPA 54 / ANSI Z223.1 - latest edition.
Air Circulation Blower: The blower electrical power cord must
be electrically grounded per local codes or per electrical codes:
In USA, NEC, ANSI / NFPA 70 - latest edition.
In Canada, CSA C22.1
WARNINGS
ELECTRICAL GROUNDING INSTRUCTIONS. THIS
APPLIANCE IS EQUIPPED WITH A THREE-PRONG
(GROUNDING) PLUG FOR YOUR PROTECTION
AGAINST SHOCK HAZARD AND SHOULD BE
PLUGGED DIRECTLY INTO A PROPERLY GROUNDED
THREE-PRONG RECEPTACLE. DO NOT CUT OR RE-
MOVE THE GROUNDING PRONG FROM THIS PLUG.
WARNING: TO AVOID ELECTRICAL SHOCK, ALWAYS
ENSURE THAT THE POWER CORD IS UNPLUGGED
(I.E., THERE IS NO ELECTRICAL POWER TO THE
CIRCULATION BLOWER) BEFORE HANDLING THE
CIRCULATION BLOWER OR PERFORMING ANY
WORK ON THE APPLIANCE.
High Altitude: Gas inputs shown are for elevations up to 4500
feet. For elevations above 4500 feet, contact your gas supplier
or qualified service technician regarding the necessary dera-
tion of appliance (deration: replacing burner orifice with a
smaller one to reduce input). Ratings must be reduced at the
rate of 4 percent for each 1,000 feet above sea level. Refer to
(for USA) NFPA 54 / ANSI Z223.1 - latest edition for orifice
resizing.
TOOL / EQUIPMENT LIST
The following tools and equipment are recommended for com-
pleting the partial assembly required when the appliance is
installed:
•
7/16”, 3/4” open end wrenchs.
• 1/4”, 3/8” nut drivers.
•
Pipe wrench.
• Phillips head screw driver.
•
Flat head screw driver.
•
Pipe sealant compound.
• Leak test fluid “U” tube manometer or pressure gauge
(0 - 16” (inches water column) H2O scale.
GAS PRESSURE (WC = Water Column)
Minimum inlet gas supply pressure for the purpose of input
adjustment:
Natural Gas - 4.5” WC min. – 7.0” WC max.
Propane (LP) - 11” WC min - 13.0” WC max.
Manifold gas supply pressure:
LOW
HIGH
Natural Gas - 1.8” + / -.3” WC (to) 3.5” + / -.3” WC
17,000 BTU / hr 26,000 BTU / hr
Propane (LP) 6.6” + / -.3” WC (to) 10” + / -.3” WC
17,000 BTU / hr 24,000 BTU / hr
Note: ” WC = Inches Water Column
PRESSURE TAPS
Gas Inlet Pressure Tap - Located on bottom left of gas valve.
Gas Outlet (manifold) pressure tap - Located on bottom right
of gas valve.
Gas Control Valve
Pressure Testing: See Pressure Testing on page 12.
Piezo Igniter
Gas Control Knob
Inlet
Pressure
Tap Wiring
Terminals
Outlet Pressure Tap
Pilot Adjustment Screw
Convertible HI/LO
Regulator
Regulator
Cap