3
INSTALLATION
Specifications for this unit in residential new construction market
require the outdoor unit, indoor unit, refrigerant 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
r
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.
For hurricane tie downs -- contact your local distributor for
details and PE (Professional 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 Using
Puron
r
Refrigerant 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.
3/8---in. Dia. Tiedown
Knockouts in Basepan
(2) Places
View From Top
UNIT BASE PAN
DIMENSIONS
TIEDOWN KNOCKOUT LOCATIONS
A
B
C
26 X 26
9–1/8
4–7/16
21–1/4
31–1/2 X 31–1/2
9–1/8
6–9/16
24–11/16
35 X 35
9–1/8
6–9/16
28–7/16
A05177
Fig. 3 ---
—
Tiedown Knockout Locations
On rooftop applications, locate unit at least 6 in. above roof
surface.
STEP 4. —
Operating Ambient
The minimum outdoor operating ambient in cooling mode is
55
_
F, and the maximum outdoor operating ambient in cooling
mode is 125
_
F.
STEP 5. —
Install TXV
NOTE
: Applies to non--TXV and R--22 TXV indoor units only.
If installing a rated and approved indoor coil without a factory
installed Puron
R
TXV, remove and replace the fixed orifice or
R--22 TXV expansion device with a hard shutoff Puron TXV.
The thermostatic expansion valve is specifically designed to
operate with Puron. Do not use an R--22 TXV. An existing R--22
TXV must be replaced with a factory--approved TXV specifically
designed for Puron. Refer to Product Data Sheet for the
appropriate TXV kit number.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
To avoid improper performance and possible
equipment failure, all indoor coil units must be
installed with a hard shut off Puron
R
TXV metering
device.
IMPORTANT
: The TXV should be mounted as close to the
indoor coil as possible and in a vertical, upright position. Avoid
mounting the inlet tube vertically down. Valve is more
susceptible to malfunction due to debris if inlet tube is facing
down. A factory--approved filter drier must be installed in the
liquid line.
24AC
A
