Installation - International comfort products NXA6 Installation Instructions Manual

For proper unit operation, check refrigerant charge using
charging information located on control box cover and/or in
the Check Charge section of this instruction.
IMPORTANT: Maximum liquid−line size is 3/8−in. OD for all
residential applications including long line. Refer to Long
Line Application Guideline for further information.
IMPORTANT: Always install the factory−supplied liquid−line
filter drier. If replacing the filter drier, refer to Specification
Sheets for appropriate part number. Obtain replacement filter
driers from your distributor or branch.

INSTALLATION

IMPORTANT: Effective January 1, 2015, all split system and
packaged air conditioners must be installed pursuant to
applicable regional efficiency standards issued by the
Department of Energy.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing and
gloves when handling parts.
Check Equipment and Job Site
UNPACK UNIT
Move to final location. Remove carton taking care not to
damage unit.
Inspect Equipment
File claim with shipping company prior to installation if
shipment is damaged or incomplete. Locate unit rating plate
on unit corner panel. It contains information needed to
properly install unit. Check rating plate to be sure unit
matches job specifications.
Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to
pad, tie down bolts should be used and fastened through
knockouts provided in unit base pan. Refer to unit mounting
pattern in Fig. 2 to determine base pan size and knockout
hole location.
For hurricane tie downs, contact local distributor for details
and PE (Professional Engineer) certification, if required by
local authorities.
On rooftop applications, mount on level platform or frame.
Place unit above a load−bearing wall and isolate unit and
tubing set from structure. Arrange supporting members to
adequately support unit and minimize transmission of
vibration to building. Consult local codes governing rooftop
applications.
Roof mounted units exposed to winds may require wind
baffles. Consult the Application Guideline and Service
Manual − Residential Split System Air Conditioners and Heat
Pumps for wind baffle construction.
NOTE: Unit must be level to within ±2_ (±3/8 in./ft ,.±9.5
mm/m) per compressor manufacturer specifications.
Clearance Requirements
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 24 in. (609.6
mm) clearance to service end of unit and 48 in. (1219.2 mm)
(above unit. For proper airflow, a 6−in. (152.4 mm) clearance
on 1 side of unit and 12−in. (304.8 mm) on all remaining
sides must be maintained. Maintain a distance of 24 in.
(609.6 mm) between units or 18 in. (457.2 mm) if no
3
overhang within 12 ft. (3.66 m) Position so water, snow, or
ice from roof or eaves cannot fall directly on unit.
NOTE:
above is approved for outdoor units with wire grille coil
guard only. Units with louver panels require 24" (609.6
mm) between units.
On rooftop applications, locate unit at least 6 in. (152.4 mm)
above roof surface.
Operating Ambient
The minimum outdoor operating ambient in cooling mode
without accessory is 55_F (12.78_C), and the maximum
outdoor operating ambient in cooling mode is 125_F
(51.67_C).
Make Piping Connections
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could result in personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal. Use all service ports
and open all flow−control devices, including solenoid
valves.
Federal regulations require that you do not vent
refrigerant to the atmosphere. Recover during system
repair or final unit disposal.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
If ANY refrigerant tubing is buried, provide a 6−in
(152.4 mm). vertical rise at service valve. Refrigerant
tubing lengths up to 36−in (914.4 mm). may be buried
without further special consideration.
lines more than 36−in. (914.4 mm).
UNIT BASE PAN
Dimension in. (mm)
23-1/2 X 23-1/2
(596.9 X 596.9)
(660.4 X 660.4)
31–1/2 X 31–1/2
(800.1 X 800.1)
(889 X 889)
Outdoor units may be connected to indoor section using
accessory tubing package or field−supplied refrigerant grade
tubing of correct size and condition. Rated tubing diameters
Specifications subject to change without notice.
18" (457.2 mm) clearance option described
WARNING
!
CAUTION
!
3/8-in. (9.53 mm) Dia.
Tiedown Knockouts in
Basepan(2) Places
View From Top
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
A
7-13/16 (198.4)
26 X 26
9–1/8 (231.8)
9–1/8 (231.8)
35 X 35
9–1/8 (231.8)
Fig. 2 − Tiedown Knockout Locations
Do not bury
B C
4–7/16 (112.7) 18–1/16 (458.8)
4–7/16 (112.7) 21–1/4 (539.8)
6–9/16 (166.7) 24–11/16 (627.1)
6–9/16 (166.7) 28–7/16 (722.3)
A05177
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