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PH14*B, PH15NB, PH16NC: Installation Instructions
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
size and knockout hole location.
For hurricane tie downs, contact distributor for details and PE
Certification (Professional Engineer), if required.
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 above 5 mph may require wind
baffles. Consult the 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 overhang
within 12 ft. (3.66 m). Position so water, snow, or ice from roof or eaves
cannot fall directly on unit.
NOTE: 18" (457.2 mm) clearance option described 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. above roof surface.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 2
to determine base pan
2
UNIT BASE PAN
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
Dimension in.
A
(mm)
23 X 23
7–3/4 (196.8)
(585 X 585)
26 X 26
9–1/8 (231.8)
(660 X 660)
31–1/2 X 31–1/2
9–1/8 (231.8)
(800 X 800)
35 X 35
9–1/8 (231.8)
(889 X 889)
Fig. 2 – Tiedown Knockout Locations
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). The maximum outdoor
operating ambient in heating mode is 66 °F (18.89°C).
Check Defrost Thermostat
Check defrost thermostat to ensure it is properly located and securely
attached. There is a liquid header with a distributor and feeder tube
going into outdoor coil. At the end of the one of the feeder tubes, there is
a 3/8 in. O.D. stub tube approximately 2 in. (50.8 mm) long (see
The defrost thermostat should be located on stub tube. Note that there is
only one stub tube used with liquid header, and on most units it is the
bottom circuit.
Fig. 3 – Defrost Thermostat Location
Elevate Unit
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not allow water and/or ice to build up in base pan.
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate drainage
of unit.
B
4–13/32 (111.9) 18–1/32 (457.9)
4–7/16 (112.7)
21–1/4 (539.8)
24–11/16
6–9/16 (166.7)
(627.1)
6–9/16 (166.7) 28–7/16 (722.3)
FEEDER TUBE
STUB TUBE
DEFROST
THERMOSTAT
A97517
C
A05177
Fig.
3).
A97517
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