Installation; Unpack Unit; Inspect Equipment - Carrier 38YZA Installation And Start-Up Instructions Manual

NOTE: Avoid contact between tubing and structure
OUTDOOR WALL
CAULK
INSULATION
THROUGH THE WALL
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
1" MIN.
SUSPENSION
Fig. 2—Connecting Tubing Installation

INSTALLATION

IMPORTANT: Specifications for this unit in residential new
construction market require the outdoor unit, indoor unit, refrig-
erant tubing sets, metering device, and filter drier listed in presale
literature. There can be no deviation. Consult the Application
Guideline and Service Manual—Air Conditioners and Heat Pumps
Using Puron® Refrigerant to obtain required unit changes for
specific applications and for R-22 retrofit.
Step 1—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.
Step 2—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. 3
to determine base pan size and knockout hole location.
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.
INDOOR WALL
LIQUID TUBE
VAPOR TUBE
JOIST
INSULATION
VAPOR TUBE
LIQUID TUBE
A94028
3 /8 -
IN. DIA TIEDOWN
KNOCKOUTS IN BASEPAN
(2) PLACES
VIEW FROM TOP
Dimensions (In.)
MINIMUM
MOUNTING PAD
UNIT SIZE
DIMENSIONS
Support Feet Snow Stand
018, 024 19 X 24
030-060 26 X 32
Fig. 3—Mounting Unit to Pad
Do not allow POE lubricant to come into contact with roofing
material. POE may deteriorate certain types of synthetic
roofing.
Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Application Guideline and Service
Manual—Air Conditioners and Heat Pumps Using Puron® Refrig-
erant for wind baffle construction
NOTE: Unit must be level to within ±2° (±3/8 in./ft) per
compressor manufacturer specifications.
Step 3—Clearance Requirements
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a 6-in.
clearance on 1 side of unit and 12 in. on all remaining sides must
be maintained. Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
On rooftop applications, locate unit at least 6 in. above roof
surface.
Step 4—Operating Ambient
The minimum outdoor operating ambient in cooling mode without
additional accessories is 55°F, and the maximum outdoor operat-
ing ambient in cooling mode is 125°F. The maximum outdoor
operating ambient in heating mode is 66°F.
Step 5—Elevate Unit
Accumulation of water and ice in base pan may cause
equipment damage.
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of the unit. Fig. 4 shows unit with accessory support feet
2
A
C L
3
8
/
16
TIEDOWN KNOCKOUT
LOCATIONS
A
23-1/2 X 28 2-13/16 6-15/16
31 X 35 4 9-3/4
B
"
A97548
B