4
CONSIDER SYSTEM REQUIREMENTS
• Consult local building codes and NEC for special instal-
lation requirements.
• Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and unit servicing. See Fig. 2.
• Locate unit so that condenser airflow is unrestricted on
all sides and above. Refer to Fig. 2.
• Unit may be mounted on a level pad directly on base
rails or mounted on raised pads at support points. See
Table 2 for weight distribution based on recommended
support points.
NOTE: If vibration isolators are required for a particular instal-
lation, use corner weight information in Table 2 to make
proper selection.
Table 2 — Weight Distribution
NOTES:
1. Dimensions in [ ] are in millimeters.
2. See Fig. 3 for additional infor mation.
Step 2 — Rig and Mount the UnitRIGGING — These units are designed for overhead rigging.
Refer to rigging label for preferred rigging method. Spreader
bars are not required if top crating is left on unit. All panels
must be in place when rigging. (See Fig. 3.) As further protec-
tion for coil faces, plywood sheets may be placed against sides
of unit, behind cables. Run cables to a central suspension point
so that angle from the horizontal is not less than 45 degrees.
Raise and set unit down carefully.
If it is necessary to roll unit into position, mount unit on
rails, using a minimum of 3 rollers. Apply force to rails, not
unit. If unit is to be skidded into position, place it on a large pad
and drag it by the pad. Do not apply any force to unit.
Raise from above to lift unit from rails or pad when unit is
in final position.
After unit is in position, remove all shipping materials and
top crating.
COMPRESSOR MOUNTING — Compressors are shipped
from the factory held down by 4 bolts. After unit is installed,
loosen each bolt until the snubber washer can be moved with
finger pressure. See Fig. 4.
Step 3 — Complete Refrigerant Piping Con-nections — Suction connection is sweat with plastic
cap; liquid connection is sweat with plastic cap. Refer to
Table 3A or 3B for the proper line sizes. Follow standard
piping practices.
SIZE REFRIGERA NT LINES — Consider length of piping
required between condensing unit and air handler, amount of
liquid lift, and compressor oil return. See Table 4A and 4B and
also refer to Part 3 of Carrier System Design Manual for design
details and line sizing. Refer to air handler installation instruc-
tions for additional information.
Table 3A — Refrigerant Piping Sizes — 60 Hz
LEGEND
Table 3B — Refrigerant Piping Sizes — 50 Hz
LEGEND
NOTES FOR TABLES 3A AND 3B:
1. Pipe sizes are based on a 2 F (1 C) loss for liquid and suction
lines.
2. Pipe sizes are based on the maximum linear length shown for
each column, plus a 50% allowance for fittings.
3. Charge units with R-22 in accordance with unit installation
instructions.
4. Line size conversion to mm is:
in. mm
1/212.7
5/815.9
11/828.6
13/834.9
UNIT
38AK
STD UNIT CORNER
W
CORNER
X
CORNER
Y
CORNER
Z
Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg
With Aluminum Coil
007 340 154 86 39 53 24 77 35 124 56
008 392 177 86 39 78 35 99 45 107 49
012 426 192 89 40 92 42 109 49 105 48
S008 510 231 115 52 89 40 133 60 173 87
S009,S012 564 256 133 60 97 44 141 64 193 88
With Copper Coil
007 386 175 106 48 65 30 82 37 133 60
008 460 208 114 52 95 43 108 49 121 55
012 503 215 118 53 116 53 119 54 119 54
S008 578 262 143 65 106 48 142 64 187 85
S009,S012 632 287 161 73 114 52 150 68 207 94
Be sure unit panels are securely in place prior to rigging.
LINEAR LENGTH OF PIPING — FT (M)
UNIT
38
0-25
(0-7.6)
25-50
(7.6-15.2)
50-75
(15.2-22.9)
75-100
(22.9-30.5)
Line Size (in. OD)
LSLSLSLS
AK007 1/211/81/211/81/211/81/211/8
AK008 1/211/81/211/85/811/85/813/8
AK012 5/811/85/813/85/813/85/813/8
AKS008 1/211/81/211/85/811/85/813/8
AKS009 5/811/85/811/85/813/85/813/8
AKS012 5/811/85/811/85/813/85/813/8
L—
Liquid LIne
S—
Suction Line
LINEAR LENGTH OF PIPING — FT (M)
UNIT
38
0-25
(0-7.6)
25-50
(7.6-15.2)
50-75
(15.2-22.9)
75-100
(22.9-30.5)
Line Size (in. OD)
LSLSLSLS
AK007 1/211/81/211/81/211/81/211/8
AK008 1/211/81/211/85/813/85/813/8
AK012 5/811/85/813/85/813/85/813/8
AKS008 1/211/81/211/85/813/85/813/8
AKS009 5/811/85/811/85/813/85/813/8
AKS012 5/811/85/811/85/813/85/813/8
L—
Liquid LIne
S—
Suction Line