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WARNING:
Do not vent furnace through a conventional
venting system.
A vent cover assembly has been supplied with the unit. It
can be found secured to the gas controls within the control
area of this unit. Figure 2 shows the proper installation of
the vent cover assembly over the vent outlet on the exterior
of the corner panel. The fasteners used to secure the vent
cover assembly have been included in the homeowner's
package.
Exhaust Duct
Opening
Fastener
Figure 2. Vent Assembly
WARNING:
The vent cover assembly must be installed to
assure proper operation of the unit.
The following list is a summary of the requirements for the
location of the termination of the venting system:
1. The location of the vent termination must be consistent
with the National Fuel Gas Code (ANSI Z223.1) or
CAN/CGA-B149 Installation Codes.
2. The vent termination must be located at least four (4)
feet horizontally from any electric meters, gas meters,
regulators, and relief equipment.
3. The vent termination must be located at least three (3)
feet above any forced air inlet located within ten (10)
feet.
4. The vent termination must be located at least four (4)
feet below, four (4) feet horizontally from, or one (1)
foot above any door, window, or gravity air inlet into
any building.
5. The vent termination must be located at least one (1)
foot above grade.
Nominal
Approximate
Cooling
Air Flow Range
Tonnage (Ton)
3.0
1100-1300
4.0
1400-1700
5.0
1800-2000
6
Corner Panel
of Unit
Vent Cover
Assembly
Approximate
Filter Area (Sq. In.)*
(CFM)
Disposable
625
825
1000
Table 1. Air Filter Requirements
6. The unit should be installed in such a manner as to
prevent snow accumulation from obstructing the vent
termination.
7. The unit installation shall avoid areas where condensate
drainage may cause problems by dropping on planters or
patios, etc. Furthermore, ensure that the exhaust gases
will not impinge on windows or building surfaces, which
may be compromised or damaged by condensation.
Do not install the unit such that exhaust from the vent
termination is directed into window wells, stairwells,
under decks, or in alcoves or similarly recessed areas.
The vent termination must not be located above any
public walkways.
Clearances to Combustible Materials — See Table 2
for required clearances to combustible materials. Refer to
the unit data label for the model number. The gas/electric
unit is suitable for installation on combustible fl ooring or
class A, B, or C roofi ng materials. A clearance of at least
36 inches from the blower access panel and from the
louvered control access panel is recommended to allow
for servicing and maintenance. Where accessibility to
combustibles clearances are greater than minimum
clearances, accessibility clearances must take
preference. Suffi cient clearance for unobstructed airfl ow
through the louvered control access panel and through
the outdoor coil must be maintained in order to achieve
rated performance. See Figure 3 for minimum clearances
to obstructions.
Thermostat — A single stage cooling/single stage heating
24VAC thermostat should be used with these units. A
two-stage cooling/single-stage heating thermostat is
recommended for economizer operation.
Air Filter Requirements — A suitable air fi lter system
must be installed in the unit or in the return air system
upstream of the evaporator coil. Refer to Table 1 for
recommended fi lter sizes. Air fi lter pressure drop must
not exceed 0.08 inches WC.
Never operate unit without a fi lter. A failure to
follow this warning could result in a fi re, personal
injury, or death.
Removal of Internal Filter Rack — First remove the
Return Air Panel from the unit. Remove the height
High Velocity
Disposable
375
500
18 x 24 (2 required)
600
20 x 25 (2 required)
WARNING:
Recommended
Filter Size (In. x In.)
High Velocity
25 x 25
20 x 20
20 x 25
25 x 25
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