General Information; Setting The Unit - Lennox 14HPX?018 Installation Instructions Manual

General Information

When servicing or repairing HVAC components, ensure
caps and fasteners are appropriately tightened. Table 1
lists torque values for typical service/repair items.
Table 1. Torque Requirements
Part
Liquid service valve cap
Suction service valve cap
Sheet metal screws
Machine screws #8
Compressor bolts
Gauge port seal cap
These instructions are intended as a general guide and do
not supersede national or local codes in any way. Consult
authorities having jurisdiction before installation.
WARNING
This product and/or the indoor unit it is matched
with may contain fiberglass wool.
Disturbing the insulation during installation, main-
tenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass wool is known to the State of California to
cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900

Setting the Unit

CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
1. Place a sound-absorbing material, such as Isomode,
under the unit if it will be installed in a location or posi-
tion that will transmit sound or vibration to the living
area or adjacent buildings.
2. Mount unit high enough above ground or roof to allow
adequate drainage of defrost water and prevent ice
build-up.
3. In heavy snow areas, do not locate unit where drifting
will occur. The unit base should be elevated above the
depth of average snows.
Recommended Torque
85 in.− lb. 10 NM
85 in.− lb. 10 NM
16 in.− lb. 2 NM
28 in.− lb. 3 NM
90 in.− lb. 10 NM
62 in.− lb. 7 NM
NOTE - Elevation of the unit may be accomplished by
constructing a frame using suitable materials. If a sup-
port frame is constructed, it must not block drain holes
in unit base.
4. When installed in areas where low ambient tempera-
tures exist, locate unit so winter prevailing winds do
not blow directly into outdoor coil.
5. Locate unit away from overhanging roof lines which
would allow water or ice to drop on, or in front of, coil
or into unit.
(AS
NOTED)
*A service clearance of 30" (702 mm) must be maintained on one
of the sides adjacent to the control box. Clearance to one of the
other three sides must be 36" (914 mm). Clearance to one of the
remaining two sides may be 12" (305 mm) and the final side may
be 6" (152 mm).
A clearance of 24" (610 mm) must be maintained between two
units. 48" (1219 mm) clearance required on top of unit. Maximum
soffit overhang is 36" (914 mm).
Figure 1. Installation Clearances
SLAB MOUNTING
When installing the unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground will not collect around the unit. See figure 2.
The slab should have a slope tolerance away from the
building of 2 degrees or 2 inches per 5 feet (51 mm per
1524 mm). This will prevent ice build-up under the unit dur-
ing a defrost cycle. Refer to roof mounting section for barri-
er construction if the unit must face prevailing winter winds.
Unit is shown with optional stand−offs (Cat# 94J35).
STRUCTURE
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
Figure 2. Slab Mounting At Ground Level
Page 3
(AS NOTED)
(AS
NOTED)
(AS NOTED)
DISCHARGE AIR
OPTIONAL
STAND−OFFS
(CAT# 94J35)
GROUND
LEVEL
14HPX SERIES