Lennox G61MPV Engineering Data page 3

FEATURES
DIRECT VENT / NON−DIRECT VENT − CONTINUED
Wall Ring − Direct or Non−Direct Vent
2 inch kit contains 2 stainless steel outside seal caps, 2
galvanized steel inside seal caps, 4 seal rings for the caps
and 18 inch insulation sleeve for sealing and isolating
intake and exhaust piping penetration of wall.
Maintain a maximum of 6 inches between the inlet and
outlet openings in the installation of the pipes.
Roof Termination Flashing Kit − Direct or Non−Direct
Vent
2 or 3 inch (51 or 76 mm) kit contains two neoprene rubber
roof flashings for vertical venting through a roof.
Vent pipe and insulation not furnished. Each kit contains
enough parts for two non−direct vent installations.
Also available for use with 2 inch (use 3 inch flashing)
Concentric Vent Termination Kits used in vertical venting
rooftop applications.
HEATING SYSTEM
B
SilentComfortt Technology
Patent pending burner sound enclosure and extra cabinet
insulation reduces operating sound levels.
C
Lennox Duralok Plus
Lennox developed heat exchanger assembly consists of
primary heat exchanger and secondary condenser coil
assembly.
Main 3-pass crimped seam design clamshell type heat
exchanger.
Constructed of heavy−gauge, aluminized steel.
Designed for normal expansion and contraction with
maximum efficiency and minimum resistance to air flow.
D
Secondary heat exchanger condenser coil constructed of
aluminum fins fitted to stainless steel tubes.
Coil is factory tested for leaks.
Condensate drain header box assembly located on front
of coil.
Compact size of complete heat exchanger assembly
permits low overall design of furnace cabinet.
All components mounted in a heavy−gauge steel frame.
Heat exchanger assembly has been laboratory life cycle
tested.
Lennox Designed Header Box
Header box on end of condenser coil collects flue
condensate for disposal through condensate collars.
Hose connects the header box drains to the condensate
collars.
The condensate collars are located on each side of the
cabinet for easy field installation of condensate drain trap.
Only one collar is used, the remainder stay plugged.
Condensate drain trap is included with the unit for field
installation.
Lennox Designed Flue Condensate Trap Assembly
Condensate trap assembly is mounted outside the
conditioned air stream.
Assembly can be mounted on either side of cabinet in
up−flow and down−flow applications. Assembly is
mounted on the bottom of the cabinet in horizontal
applications. See Installation Instructions.
Connection can be made with field provided 1/2 in. PVC
pipe, 3/4 in. PVC coupling, or 1−1/4 in. OD x 1 in. ID vinyl
tubing with hose clamp.
Optional Condensate Trap Alternate Location Kit allows
condensate drain to be installed on the opposite side of the
furnace from the exhaust venting (up−flow applications only).
Easy to clean and winterize.
®
Heat Exchanger Assembly
E
Inshot Burners
Aluminized steel inshot burners provide efficient,
trouble−free operation.
Burner venturi mixes air and gas in correct proportion for
proper combustion.
Burner assembly is removable from the unit as a single
component for ease of service.
F
Two−Stage Gas Control Valve
24 volt redundant combination two stage gas control valve
combines manual shut off valve (On−Off), automatic
electric valve (dual) and gas pressure regulation into a
compact combination control.
Flame Rollout Switch
Manual reset switches are factory installed on burner box.
Switch provides protection from abnormal operating
conditions.
®
SureLight Hot Surface Ignitor
Tough, reliable, long−life, trouble−free performance.
Tungsten heater element sandwiched between two plates
of silicon nitride.
Cemented to steatite block for protection against current
leakage.
Ignition leads constructed of nickel plated copper
enclosed in high temperature Teflon insulation for
dependable operation. No electrical noise.
G
Combustion Air Inducer
PSC, heavy−duty blower prepurges heat exchanger and
safely vents flue products.
H
Pressure switches prove blower operation before
allowing gas valve to open.
Operates only during heating cycle.
Limit Controls
Automatic reset, primary and secondary limits are
accurately located.
Primary limit factory installed on vestibule panel on all
units, secondary limit factory installed on blower housing.
OPTIONS
High Altitude Orifice Kit − Natural Gas Only
Required for −071−091−111 natural gas models for proper
unit operation at altitude of 2000 to 10,000 feet.
Required on all natural gas models for proper unit
operation at altitudes of 7500 to 10,000 feet.
See Gas Heat Accessory table for details.
Proper orifice for LPG/Propane models is included with
LPG/Propane Conversion Kit.
High Altitude Pressure Switch Kit
Required on certain units for proper unit operation on
installations above 2,000 ft.
Order two per unit.
LPG/Propane Conversion Kit
Required for field changeover from natural gas to
LPG/Propane.
Natural Gas Conversion Kit
Required for field changeover from LPG/Propane to
natural gas.
G61MPV / Page 3