Step 5 - Install Flue Hood; Step 6 - Trap Condensate Drain - Carrier WEATHERMAKER 48A2 Installation Instructions Manual

UNIT
MOTOR
SIZE MOTOR
SHAFT DIA.
48A2,A3, HP
(in.)
A4,A5
5 1.125
020 10 1.375
15 1.625
5 1.125
025 10 1.375
15 1.625
10 1.375
027 15 1.625
20 1.625
10 1.375
030 15 1.625
20 1.625
15 1.625
035 20 1.625
25 1.875
15 1.625
040 20 1.625
25 1.875
20 1.625
050 25 1.875
30 1.875
25 1.875
060 30 1.875
40 2.125
NOTES:
1. Motor shaft speed is 1750 rpm. The fan shaft diameter is 1
a48-8241
Fig. 12 — Air Distribution — Thru-the-Bottom
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.
Table 6 — Evaporator Fan Motor Data
MOTOR
FAN
MOTOR SHEAVE
SHAFT
SHEAVE PITCH
SPEED
(P/N) DIAMETER
(rpm)
(in.)
717 BK55 4.8
924 2BK50 4.4
1096 2B5V56 5.7
717 BK55 4.8
962 1B5V60 6.1
1106 2B5V54 5.5
848 2BK50 4.4
1059 2B5V56 4.9
1187 2B5V58 5.9
856 2BK50 4.4
1096 2B5V56 5.7
1187 2B5V58 5.9
1025 2B5V50 5.1
1147 2B5V56 5.7
1247 2B5V62 6.2
976 2B5V52 5.3
1050 2B5V56 5.7
1182 2B5V74 7.5
1050 2B5V56 5.7
1142 2B5V62 6.2
1234 2B5V66 6.7
1019 3B5V52 5.3
1086 3B5V58 5.9
1197 3B5V64 6.5
15 / inches.
16
FAN
BUSHING FAN SHEAVE
DIAMETER SHEAVE PITCH
(in.) (P/N) DIAMETER
(in.)
NONE - 1.125 1B5V124 12.4
NONE - 1.375 2B5V86 8.6
B - 1.625 2B5V90 9.1
NONE - 1.125 1B5V124 12.4
H - 1.375 1B5V110 11.1
B - 1.625 2B5V86 8.7
NONE - 1.375 2B5V94 9.4
B - 1.625 2B5V90 8.1
B - 1.625 2B5V86 8.7
H - 1.375 2B5V94 9.0
B - 1.625 2B5V90 9.1
B - 1.625 2B5V86 8.7
B - 1.625 2B5V86 8.7
B - 1.625 2B5V86 8.7
B - 1.875 2B5V86 8.7
B - 1.625 2B5V94 9.5
B - 1.625 2B5V94 9.5
B - 1.875 2B5V110 11.1
B - 1.625 2B5V94 9.5
B - 1.875 2B5V94 9.5
B - 1.875 2B5V94 9.5
B - 1.875 3B5V90 9.1
B - 1.875 3B5V94 9.5
B - 2.125 3B5V94 9.5
2. All indoor fan motors meet the minimum efficiency requirements
as established by the Energy Policy Act of 1992 (EPACT), effective
October 24, 1997.
a48-8242
Fig. 13 — Air Distribution — Thru-the-Side
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 —
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.
17
BUSHING BELT BELT
DIAMETER (Quantity) TENSION
(in.) (P/N) (lb at .25 in.)
B - 1.9375 BX56 8
B - 1.9375 (2) BX50 8
B - 1.9375 (2) 5VX530 9
B - 1.9375 BX56 8
B - 1.9375 5VX570 11
B - 1.9375 (2) 5VX530 9
B - 1.9375 (2) BX50 8
B - 1.9375 (2) 5VX530 10
B - 1.9375 (2) 5VX530 11
B - 1.9375 (2) BX50 8
B - 1.9375 (2) 5VX530 9
B - 1.9375 (2) 5VX530 11
B - 1.9375 (2) 5VX500 9
B - 1.9375 (2) 5VX530 10
B - 1.9375 (2) 5VX530 11
B - 1.9375 (2) 5VX530 10
B - 1.9375 (2) 5VX550 11
B - 1.9375 (2) 5VX590 11
B - 1.9375 (2) 5VX550 10
B - 1.9375 (2) 5VX570 11
B - 1.9375 (2) 5VX570 13
B - 1.9375 (3) 5VX530 12
B - 1.9375 (3) 5VX550 12
B - 1.9375 (3) 5VX570 14
See Fig. 4-9