Carrier 09DK054-094 - Manual (Page 4)

Step 2 — Rig and Place Unit
RIGGING - The 09DK units are designed for overhead
rigging and this method should be used Lifting holes are
provided in the frame base rails, which are marked for rig­
ging (see rigging label on the unit). It is recommended that
field supplied pipes of sufficient length that extend beyond
the frame are passed through the holes. Attach cables, chains,
or straps to both ends of the pipes. Use spreader bars or a
frame to keep the cables, chains, or straps clear of the unit
sides. All cables should run to a central suspension point
so that the angle from the horizontal is not less than
45 degrees. See Fig. 2-4 and Tables lA and IB for weight
distribution information. Standard coil protection packag­
ing provides some protection to the unit. Raise and set the
unit down carefully.
Domestic Units With No Overhead Rigging— Standard con­
denser packaging consists of coil protection only. Skids are
not provided as part of the standard packaging. If overhead
rigging is not available at the jobsite, place the unit on a
skid or pad by using jacks at the rigging points before drag­
ging or rolling. When rolling, use a minimum of 3 rollers.
When dragging, pull the pad or skid. Do not apply pressure
to the unit. Raise from above to lift off the pad or skid
when in final position. See rigging section above for more
information.
Export and Domestic Units With Skids— All export units
are mounted on skids with vertical coil protection. Leave
the unit on the skid until it is in the final position. While on
the skid, the unit can be rolled, dragged or forklifted; do
not apply force to the unit. Use a minimum of 3 rollers
when rolling, and raise from above to remove the skid when
unit is in the final position. See preceding rigging proce­
dure for more information.
A CAUTION
To avoid damage to units, do not forklift them unless
they are attached to skids designed for forklifting. Fork­
lift trucks used to lift units on skids must have forks a
minimum of 60 in. (1524 mm) long.
PLACING THE UNIT — Locate the condenser where an
adequate supply of outdoor air is available for the unit in­
let. Do not locate where the possibility of air recirculation
exists, such as under a roof overhang. Also, locate the con­
denser in an area free from airborne dirt or other foreign
material which could clog the condenser coils. Refer to
Fig. 2-4 for airflow clearances For multiple units, allow
8 ft (2440 mm) separation between units for airflow and
service. Placement area must be level and strong enough
to support operating weight of the unit (Fig. 2-4 and
Tables lA and IB). It is recommended to bolt unit securely
to pad when unit is positioned and leveled. Fasteners for
mounting unit are field supplied. If vibration isolators are
required for a particular installation, refer to the unit weight
distribution data tables in Fig. 2-4 to help select the proper
isolators.
Step 3 — Complete Refrigerant Piping
GENERAL — All field leak and pressure testing should be
in accordance with local code requirements. If a local code
does not exist, use ASHRAE (American Society of Heat­
ing, Refrigeration and Air Conditioning Engineers) Stand­
ard 15, Safety Code for Mechanical Refrigeration.
For leak testing procedures, refer to the Carrier
“Refrigerant Service Techniques” book. Form SM-IA
For any parts that need to be removed, use a mini tubing
cutter. Perform phos-copper brazing on all field-made con­
nections while protecting adjacent joints from heat.
Install or replace filter-drier(s).
COIL REFRIGERANT PIPING INSTALLATION - Hot
gas and liquid connections are located on the same end and
have a heat-shrunk cap, which ensures a clean joint for field
piping. The coil circuiting is designed to provide several
selections of coil splits to satisfy various applications (See
Table 2), with piping connections made in the field. In all
cases where circuits are field connected, the piping connec­
tions should be made within the unit cabinet The hot gas
lines should enter and the liquid lines should leave the con­
denser at the header end of the unit.
A tubing package for headering, including two fan cycle
pressure switches (FCPSs) and hardware, is provided for
the 100, 50/50, and nominal 67/33% (054-084 only) con­
denser coil circuiting options. The tubing also provides
ports for easy FCPS installations. The ports come with a
1/4-in. male flare fitting and check valve for each FCPS
replacement. Tubing and FCPSs are field installed regard­
less of circuiting. Tubing packages are not offered for the
33/33/33% and 33/33/17/17% coil circuiting options; tub­
ing for these coil circuit options must be field fabricated
and installed. See Fig. 5-7 for tubing package contents
NOTE. 67/33, 33/33/33 and 33/33/17/17% represent aver­
age coil split combinations. Refer to sections below for ac­
tual values for your particular coil split combination. Note
that 09DK094 units can only have 100% or 50/50% splits.
IMPORTANT: With the 67/33, 33/33/33, and 33/33/
17/17% capacity split options, 3 or 4 FCPSs are used
For these applications, an accessory fan control kit is
required. See accessory installation instmctions for more
information.
Figure 8 shows a typical piping application for a condenser
with a multiple-split system. Figure 9 shows the typical field
piping arrangements for the 09DK units. See Fig. 10 and
11 for coil connection details. Figures 12 and 13 show typ-
*,ical factory supplied coil circuiting and typical field in­
stalled 67/33% coil split circuiting, respectively.
Table 2 — Coil Circuiting Options
09DK 09DK CIRCUITING OPTIONS
054 100% 50/50% 66/34 34/34/32 34/34/16/16
064 100% 50/50% 66/34 34/34/32 34/34/16/16
074 100% 50/50% 68/32 32/32/36 32/32/18/18
084 100% 50/50% 67/33 33/33/33 33/33/17/17
094 100% 50/50% - - -