Step 3 — field fabricate ductwork, Step 4 — make unit duct connections, Step 5 — trap condensate drain – Carrier 50EY User Manual
Page 11: Table 2 — evaporator fan motor data
Table 2 — Evaporator Fan Motor Data
UNIT
SIZE
MOTOR
HP
MOTOR
SHAFT
DIAMETER
(in.)
FAN
SHAFT
SPEED
(rpm)
MOTOR
SHEAVE
MOTOR
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
FAN
SHEAVE
FAN
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
BELT
OUTSIDE
BELT
LENGTH
BELT
TENSION
(Lb @
.24 in.)
024
5
1.12
725
BK52
4.6
None-1.125
1B5V110
11.1
B-1.6875
BX59
62
5.02
10
1.38
924
BK72
6.6
None-1.375
1B5V124
12.5
B-1.6875
BX60
63
7.05
15
1.62
1088
1B5V68
6.9
B-1.625
1B5V110
11.1
B-1.6875
5VX590
59
9.38
028
7.5
1.38
773
BK55H
4.9
H-1.375
1B5V110
11.1
B-1.6875
BX56
59
6.87
10
1.38
962
BK67H
6.1
H-1.375
1B5V110
11.1
B-1.6875
BX56
59
7.26
15
1.62
1119
1B5V70
7.1
B-1.625
1B5V110
11.1
B-1.6875
5VX590
59
9.17
030
10
1.38
843
BK72
6.6
None-1.375
1B5V136
13.7
B-1.6875
BX62
65
6.96
15
1.62
1056
1B5V66
6.7
B-1.625
1B5V110
11.1
B-1.6875
5VX590
59
9.60
20
1.62
1182
1B5V74
7.5
B-1.625
1B5V110
11.1
B-1.6875
5VX600
60
11.67
034
10
1.38
896
BK70H
6.4
H-1.375
1B5V124
12.5
B-1.6875
BX60
63
7.20
15
1.62
1088
1B5V68
6.9
B-1.625
1B5V110
11.1
B-1.6875
5VX590
59
9.38
20
1.62
1182
1B5V74
7.5
B-1.625
1B5V110
11.1
B-1.6875
5VX600
60
11.17
038
10
1.38
788
2BK47
4.1
None-1.375
2B5V90
9.1
B-1.6875
BX51
54
5.49
15
1.62
966
1B5V68
6.9
B-1.625
1B5V124
12.5
B-1.6875
5VX630
63
9.22
20
1.62
1050
1B5V74
7.5
B-1.625
1B5V124
12.5
B-1.6875
5VX650
65
10.02
044
15
1.62
966
1B5V68
6.9
B-1.625
1B5V124
12.5
B-1.6875
5VX630
63
9.54
20
1.62
1035
1B5V80
8.1
B-1.625
1B5V136
13.7
B-1.6875
5VX670
67
10.37
25
1.88
1162
1B5V90
9.1
B-1.875
1B5V136
13.7
B-1.6875
5VX680
68
10.88
048
20
1.62
1019
2B5V52
5.3
B-1.625
2B5V90
9.1
B-1.6875
5VX550
55
7.93
25
1.88
1135
2B5V58
5.9
B-1.875
2B5V90
9.1
B-1.6875
5VX560
56
8.66
30
1.88
1182
2B5V76
7.5
B-1.875
2B5V110
11.1
B-1.6875
5VX610
59
9.07
NOTE: Motor shaft speed is 1750 rpm. The fan shaft diameter is 1
11
⁄
16
inches.
ROOF MOUNT — Check building codes for weight distri-
bution requirements.
Step 3 — Field Fabricate Ductwork —
Secure all
ducts to building structure. Use flexible duct connectors be-
tween unit and ducts as required. Insulate and weatherproof
all external ductwork, joints, and roof openings with counter
flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
To attach ductwork to roof curb, insert ductwork approxi-
mately 10 to 11 in. up into the curb. Connect ductwork to
14-gage roof curb material using sheet metal screw driven
from inside the duct.
The units with electric heat require a 1-in. clearance for
the first 24 in. of ductwork.
NOTE: A 90-degree elbow must be provided in the duct-
work to comply with UL (Underwriters’ Laboratories) codes
for use with electric heat.
Outlet grilles must not lie directly below unit discharge.
Step 4 — Make Unit Duct Connections
50EJ,EK UNITS — Unit is shipped for through-the-bottom
duct connections. Ductwork openings are shown in Fig. 3
and 4. Attach all ductwork to roof curb. Air distribution
is shown in Fig. 8. Refer to installation instructions shipped
with accessory roof curb for more information.
50EW,EY UNITS — Remove shipping covers from supply
and return air openings. Attach field-supplied ductwork to
unit. Use a single duct over both return openings and a single
duct over both supply openings. See Fig. 5 and 6 for duct
opening dimensions. Secure all ducts to the building struc-
ture. See Fig. 9. Use flexible duct connectors between unit
and ducts as required.
Install accessory barometric relief or power exhaust in the
field-fabricated return ductwork. Refer to Position Power
Exhaust/Barometric Relief Damper Hood Section on
page 29 for more information.
Step 5 — Trap Condensate Drain —
See Fig. 3-6
and 10 for drain location. Condensate drain is open to the
atmosphere and must be trapped. Install a trapped drain at
the drain location. One 1-in. FPT coupling is provided in-
side unit evaporator section for condensate drain connec-
tion. A trap at least 4-in. deep must be used. Trap must be
installed to prevent freeze-up.
Condensate pans are sloped so that water will completely
drain from the condensate pan to comply with indoor air qual-
ity guidelines.
Fig. 8 — Air Distribution — Thru-the-Bottom
Fig. 9 — Air Distribution — Thru-the-Side
11