Lennox SW 036 Installation Instructions Manual Download Page 7

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Page 7

WARNING

Electric shock hazard and danger of
explosion. Can cause injury, death or
product or property damage. Turn off
electrical power to unit before
performing any maintenance or
servicing operations on the unit.

IMPORTANT

The Clean Air Act of 1990 bans the intentional vent
ing of refrigerant (CFC's and HCFC's) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar
ceration may be levied for non-compliance.

Unit Support

In downflow discharge installations, install the unit on a

non-combustible surface only.

NOTE - Securely fasten roof frame to roof per local codes.

Downflow Discharge Application

Roof Mounting with S1 / S6 / S7CURB

1- The S1 / S6 / S7CURB roof mounting frame must be

installed, flashed and sealed in accordance with the
instructions provided with the frame.

2- The S1 / S6 / S7CURB roof mounting frame should

be square and level to 1/16” per linear foot (5mm per
linear meter) in any direction.

3- Duct must be attached to the roof mounting frame

and not to the unit; supply and return plenums must
be installed before setting the unit.

Installer's Roof Mounting Frame

Many types of roof frames can be used to install the unit

depending upon different roof structures. Items to keep

in mind when using the building frame or supports are:

1- The base is fully enclosed and insulated, so an

enclosed frame is not required.

2- The frames or supports must be constructed with

non-combustible materials and should be square and
level to 1/16” per linear foot (5mm per linear meter)
in any direction.

3- Frame or supports must be high enough to prevent any

form of moisture from entering unit. Recommended
minimum frame height is 14” (356mm).

4- Duct must be attached to the roof mounting frame

and not to the unit. Supply and return plenums must
be installed before setting the unit.

5- Units require support along all four sides of unit base.

Supports must be constructed of steel or suitably
treated wood materials.

NOTE-When installing a unit on a combustible surface for
downflow discharge applications, an S1 / S6 / S7CURB
roof mounting frame is required.

Duct Connection

All exterior ducts, joints and openings in roof or building
walls must be insulated and weather-proofed with
flashing and sealing compounds in accordance with
applicable codes. Any duct passing through an
unconditioned space must be insulated.

CAUTION

In downflow applications, do not drill or punch
holes in base of unit. Leaking in roof may occur if
unit base is punctured.

Rigging Unit For Lifting

Rig unit for lifting by attaching four cables to holes in unit

base rail. See figure 3.

1- Detach wooden base protection before rigging.

2- Connect rigging to the unit base using both holes in

each corner.

3- All panels must be in place for rigging.

4- Place field‐provided H‐style pick in place just above

top edge of unit. Frame must be of adequate
strength and length. (H-style pick prevents damage
to unit.)

FIGURE 3