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Table 2 - PHYSICAL DATA
Evaporator Coil
Centrifugal Blower
Blower Motor*
Filters
(4 Req'd)
Weight (Lbs,/kg)
Accessory Weights(Lbs/kg)
*All of these 1450 RPM motors have a solid base, a 56 frame, inherent protection and permanently lubricated ball bearings. Refer to Table 7 for additional motor and drive
data.
NOTE: Refer to the appropriate condensing unit installation instruction for charging data.
REFRIGERANT MAINS
Many service problems can be avoided by taking adequate pre-
cautions to provide an internally clean and dry system, and by us-
ing procedures and materials that conform with established
standards.
Hard drawn copper tubing should be used where no apprecia-
ble amount of bending around pipes or other obstructions in
necessary. Use long radius ells wherever possible. If soft cop-
per is used, care should be taken to avoid sharp bends which
may cause a restriction.
Pack fiber glass insulation and a sealing material such as Per-
magum around refrigerant lines where they penetrate a wall to
reduce vibration and to retain some flexibility.
Support all refrigerant lines at minimum intervals (8 ft./2.4m)
with suitable hangers, brackets or clamps.
Braze all copper to copper joints witH Sil-Fos 5 or equivalent
brazing material. Do not use soft solder.
Never braze or solder liquid and suction lines together. The
complete suction line should be insulated with no less the
(12mm) ARMAFLEX or equivalent. If the liquid line is installed
in warm space, it must be insulated.
If it is desirable to tape or wire the liquid and suction lines to-
gether for support purposes, they must be completely insulated
from each other.
INSTALLING REFRIGERANT MAINS
The units are evacuated and dehydrated at the factory and
shipped with a holding charge (1 lb./2.2kg) of Refrigerant-22.
The suction and liquid connections are sealed with copper
disks.
Unitary Products Group
Model
Rows Deep
Rows High
Finned Length (in./mm)
Fin/Inch
Tube O.D. (in./mm)
.2
2
Face Area (Ft
/m
)
Wheel Dia. x Width
Nominal Rating (HP/kW)
Size
2
2
Face Area (Ft.
/m
)
Operating
10 kW
16kW
Electric Heaters
26 kW
36 kW
Supply Air Plenum
Base
Return Air Grille
Hot Water Coil
KEU090
3
27
46 / 1168
13
3
/ 9.5
8
8.6 / 0.80
inches
15 x15
mm
381 x 381
1
1
/ 1.12
2
inches
16 x 25 x 1
mm
406 x 635 x 25
11.1 / 1.03
325 / 147
63 / 28.6
66 / 30
71 / 32
74 / 33.6
102 / 46
60 / 27
15 / 6.8
105 / 48
WARNING: Provisions for recovering refrigerant releases
must be available during all phases of installation,
leak testing and charging. Do NOT release refrig-
erant into the atmosphere. A Schrader valve is pro-
vided for refrigerant recovery.
If the unit has already lost its holding charge, it should be leak
tested and the necessary repairs should be made. If the unit
has maintained its holding charge, you can assume that it has
no leaks and proceed with the installation.
Make sure the refrigerant in the lines has been recovered, then
drill a small hole through the discs to prevent any internal pres-
sure from blowing them off and to allow the flow of dry nitrogen
through the connections when unbrazing the closures.
NOTE: To minimize the possibility of system failure due to dirt
and moisture, a filter-drier must be installed in each
liquid line as close to the evaporator as possible.
Filter-driers are not supplied with the evaporator blow-
ers. They are supplied with the matching condensing
sections.
1
"
2
The temperature required to make or break a brazed
joint is sufficiently high to cause oxidation of the copper
unless an inert atmosphere is provide.
CAUTION: Dry nitrogen should flow through a brazed joint at
all times when heat is being applied and until the
joint has cooled.
The liquid, suction and drain connections inside the unit
must be piped to the outside. Refer to Unit Dimensions
for locations and dimensions of these connection.
550.39-N4YI
KEU120
3
32
46 / 1168
13
3
/ 9.5
8
10.2 / 0.95
15 x 15
381 x 381
2 / 1.5
16 x 25 x 1
406 x 635 x 25
11.1 / 1.03
330 / 150
63 / 28.6
66 / 30
71 / 32
74 / 33.6
102 / 46
60 / 27
15 / 6.8
117 / 53
5
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