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Direct or Non--direct Venting —ThePlus 90x can be installed
as a 1 pipe/Non--Direct vent (except 140 size unit and in
manufactured/mobile home installations) or 2 pipe/Direct vent
furnace. All direct vent Plus 90x models can be installed in a
manufactured (mobile) home when the optional kit is used. This
provides added flexibility to meet diverse installation needs.
Insulated Blower Compartment —The acoustical insulation
reduces air and motor noise to promote quiet operation.
Combustion Products Venting — The combustion--air and vent
pipes can terminate through a side wall or through the roof when
used with a factory--authorized vent termination kit.
Insulation — Foil--faced insulation in heat exchanger section of
the casing minimizes heat loss.
Bottom Closure — Factory--installed for side return; easily
removable for bottom return.
Filter — Cleanable filter with retainer is standard.
Blower Access Panel Switch — Shuts off all 115--v power
through furnace components whenever blower access panel is
opened.
Casing — One piece, seamless wrap--around construction of
heavy, galvanized steel that resists corrosion.
Adjustable Blower Speed — For precise airflow selection of
heating or cooling operation.
Monoport Burners — The burners are finely tuned for smooth,
quiet combustion plus economical gas usage.
Slow Opening Redundant Gas Valve — Shuts off gas to burners
if any of the valves fails to close completely for any reason. The
slow opening feature reduces start--up noise from rapid ignition.
Quality Registration —ThePlus 90x is engineered and
manufactured under an ISO 9001 registered quality system.
Certifications —ThePlus 90x Model units are CSA (A.G.A.
and C.G.A.) design certified for use with natural and propane
gases. The furnace is factory--shipped for use with natural gas. A
CSA (A.G.A./C.G.A.) listed gas conversion kit is required to
convert furnace for use with propane gas. The efficiency is
GAMA efficiency rating certified. The Plus 90x meets California
Air Quality Management District emission requirements. Refer to
Vent Table, for elevation limitations.
A92505
A02172
BLOWER OFF-DELAY
T1 DHUM G COM W TIT2 R
24V
TEST / TWIN
HUH
PLT
SEC-2 SEC-1
COM 24VAC
PL1
24V MTR TAPS
COM
HEAT
COOL
FAN
SPARE 2 SPARE 1
EAC-2
EAC-1
L1 BL-1 PR-1
PL2
BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION
& DIAGNOSTIC LIGHT
BLOWER SPEED
SELECTION
TERMINALS
115-VAC (L2)
NEUTRAL
CONNECTIONS
115-VAC (LI)
NUETRAL
CONNECTIONS
EAC-1 TERMINAL
(115-VAC 1.0 AMP. MAX0
PL1-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTION
PL1-LOW VOLTAGE
MAIN HARNESS
CONNECTOR
TRANSFORMER
24-VAC CONNECTION
S
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP. MAX
)
TWINNING AND/OR
COMPONENT TEST
TERMINAL
1
120 180
90 150
A08345
353AAV