Direct Vent Sealed Combustion System; Options; Lennox Designed Header Box; Lennox Designed Flue Condensate Trap Assembly - Lennox SLP98UHV User Manual

FEATURES
HEATING SYSTEM (CONTINUED)
Heat exchanger assembly has been laboratory life cycle
tested in excess of industry standards.

Lennox Designed Header Box

Header box on end of condenser coil collects flue
condensate for disposal through condensate drains.
The drains are located on each side of the cabinet for
easy field installation of condensate drain trap.
Only one drain is used, the other drain is sealed.
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 upflow applications. Assembly is mounted below
the cabinet in horizontal applications. See Dimension
Drawing and Installation Instructions. Can also be
mounted remotely (up to 5 ft. away) from unit.
90° street elbow furnished for ease of drain trap
installation.
Drain connection can be made with field provided PVC
pipe or PVC coupling.
Drain cap on trap allows easy cleaning and winterizing.
Inshot Burners
E
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.
Variable Capacity Gas Control Valve
F
Variable capacity gas control valve adjusts capacity
output in increments as small as 1% or as large as
needed. 24 volt redundant combination valve combines
manual shut off switch (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.
Silicon nitride ignitor.
Cemented to steatite block for protection against current
leakage.
Ignition leads are constructed of nickel plated copper
and are enclosed in high temperature Teflon
for dependable operation.
Variable Speed Combustion Air Inducer
G
Three-phase variable speed inducer motor is controlled
by the SureLight Control.
Overload protected (auto-reset).
Heavy-duty blower prepurges heat exchanger and
safely vents flue products.
Operates only during heating cycle.
Pressure Switches (Two-Stage)
H
Prove Combustion Air Inducer operation before allowing
gas valve to open.
Limit Control
Automatic reset, primary limit is accurately located on
vestibule panel on all units.

OPTIONS

High Altitude Pressure Switch Kit
Required for proper unit operation on installations above
7500 ft.
Natural Gas to LPG/Propane Conversion Kit
Required for field changeover from natural gas to LPG/
Propane. Includes gas valve and orifices.
LPG/Propane to Natural Gas Conversion Kit
Required for field changeover from LPG/Propane to
natural gas.
DIRECT VENT SEALED COMBUSTION
SYSTEM
Furnace features a "sealed combustion" system
and can only be installed in Direct Vent (two pipe)
applications.
In Direct Vent applications, combustion air is supplied
from outdoors and flue gases are discharged outdoors.
OPTIONS
Termination Kits
Facilitates installation of combustion air intake pipe and
flue exhaust pipe.
Refer to venting table in this bulletin to determine pipe
size needed and proper termination kit required.
See Optional Accessories table and dimension
drawings.
Termination Kit - Concentric
2 or 3 inch kit contains concentric termination
assembly, reducer bushing and 45° elbow.
2 inch kit for -070 model contains an outdoor exhaust
accelerator.
Kit requires single hole penetration of roof or wall for
installation.
Roof Termination Flashing Kit is available for use with
2 inch Kits.
insulation
®
CSA certified.
SLP98UHV / Page 3