17
Table 6 — Evaporator Fan Motor Data
NOTES:
1. Motor shaft speed is 1750 rpm. The fan shaft diameter is 1
15
/
16
inches. 2. All indoor fan motors meet the minimum efficiency requirements
as established by the Energy Policy Act of 1992 (EPACT), effective
October 24, 1997.
48A4 AND A5 UNITS — Remove shipping covers from
supply and return air openings. Attach field-supplied ductwork
to unit. Connect to the unit with a single duct for all supply
openings and with a single duct for all return openings.
Splitting of the airflow into branch ducts should not be done at
the unit. Sufficient duct length should be used prior to branch-
ing to ensure the air temperatures are well mixed within the
ductwork. See Fig. 7-9 for duct opening dimensions. Secure all
ducts to building structure. Air distribution is shown in Fig. 7-9
and Fig. 13.
Install accessory barometric relief or power exhaust in the
field-fabricated return ductwork. Refer to Step 10 — Position
Power Exhaust/Barometric Relief Damper Hood section on
page 30 for more information.
Step 5 — Install Flue Hood
48A2,A3,A4,A5020-050 UNITS — Flue hood is shipped in-
side gas section of unit. To install, secure flue hood to access
panel. See Fig. 14.
48A2,A3,A4,A5060 UNITS — Flue hood and wind baffle
are shipped inside gas section of unit. To install, secure flue
hood to access panel. Install the two pieces of the wind baffle
over the flue hood. See Fig. 15.
NOTE: When properly installed, flue hood will line up with
combustion fan housing. See Fig. 16.
Step 6 — Trap Condensate Drain — See Fig. 4-9
for drain location. Condensate drain is open to atmosphere and
must be trapped. Install a trapped drain at the drain location.
One 1-in. female coupling is provided inside the unit evapora-
tor section for condensate drain connection. A trap at least 4-in.
deep must be used. See Fig. 17. Trap must be installed to pre-
vent freeze-up.
Condensate pans are sloped so that water will completely
drain from the condensate pan to comply with indoor air quali-
ty guidelines. The condensate drain pans are not insulated.
UNIT
SIZE
48A2,A3,
A4,A5
MOTOR
HP
MOTOR
SHAFT DIA.
(in.)
FAN
SHAFT
SPEED
(rpm)
MOTOR
SHEAVE
(P/N)
MOTOR
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
FAN
SHEAVE
(P/N)
FAN
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
BELT
(Quantity)
(P/N)
BELT
TENSION
(lb at .25 in.)
020
5 1.125 717 BK55 4.8 NONE - 1.125 1B5V124 12.4 B - 1.9375 BX56 8
10 1.375 924 2BK50 4.4 NONE - 1.375 2B5V86 8.6 B - 1.9375 (2) BX50 8
15 1.625 1096 2B5V56 5.7 B - 1.625 2B5V90 9.1 B - 1.9375 (2) 5VX530 9
025
5 1.125 717 BK55 4.8 NONE - 1.125 1B5V124 12.4 B - 1.9375 BX56 8
10 1.375 962 1B5V60 6.1 H - 1.375 1B5V110 11.1 B - 1.9375 5VX570 11
15 1.625 1106 2B5V54 5.5 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 9
027
10 1.375 848 2BK50 4.4 NONE - 1.375 2B5V94 9.4 B - 1.9375 (2) BX50 8
15 1.625 1059 2B5V56 4.9 B - 1.625 2B5V90 8.1 B - 1.9375 (2) 5VX530 10
20 1.625 1187 2B5V58 5.9 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
030
10 1.375 856 2BK50 4.4 H - 1.375 2B5V94 9.0 B - 1.9375 (2) BX50 8
15 1.625 1096 2B5V56 5.7 B - 1.625 2B5V90 9.1 B - 1.9375 (2) 5VX530 9
20 1.625 1187 2B5V58 5.9 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
035
15 1.625 1025 2B5V50 5.1 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX500 9
20 1.625 1147 2B5V56 5.7 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 10
25 1.875 1247 2B5V62 6.2 B - 1.875 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
040
15 1.625 976 2B5V52 5.3 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX530 10
20 1.625 1050 2B5V56 5.7 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX550 11
25 1.875 1182 2B5V74 7.5 B - 1.875 2B5V110 11.1 B - 1.9375 (2) 5VX590 11
050
20 1.625 1050 2B5V56 5.7 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX550 10
25 1.875 1142 2B5V62 6.2 B - 1.875 2B5V94 9.5 B - 1.9375 (2) 5VX570 11
30 1.875 1234 2B5V66 6.7 B - 1.875 2B5V94 9.5 B - 1.9375 (2) 5VX570 13
060
25 1.875 1019 3B5V52 5.3 B - 1.875 3B5V90 9.1 B - 1.9375 (3) 5VX530 12
30 1.875 1086 3B5V58 5.9 B - 1.875 3B5V94 9.5 B - 1.9375 (3) 5VX550 12
40 2.125 1197 3B5V64 6.5 B - 2.125 3B5V94 9.5 B - 1.9375 (3) 5VX570 14
Fig. 12 — Air Distribution — Thru-the-Bottom
a48-8241
Fig. 13 — Air Distribution — Thru-the-Side
a48-8242
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