Carrier 50PG20 User Manual

7
Orifice Change (48PG Only) — This unit is factory
assembled for heating operation using natural gas at an eleva-
tion from sea level to 2000 ft.
Use accessory high altitude kit when installing this unit at
an elevation of 2000 to 7000 ft. For elevations above 7000 ft,
refer to High Altitude section on page 90 to identify the correct
orifice size for the elevation. Purchase these orifices from your
local Carrier dealer. Follow instructions in accessory Installa-
tion Instructions to install the correct orifices.
Use accessory LP (liquid propane) gas conversion kit when
converting this unit for use with LP fuel usage for elevations
up to 7000 ft. For elevations above 7000 ft, refer to High
Altitude section on page 90 to identify the correct orifice size
for the elevation. Purchase these orifices from your local
Carrier dealer. Follow instructions in accessory Installation
Instructions to install the correct orifices.
Power Supply — All 208/230-v units are factory
wired for 230-v power supply. If the 208/230-v unit is to be
connected to a 208-v power supply, the transformers (TRAN1,
TRAN2 and TRAN3) must be rewired by moving the wire
from the 230-volt connection and moving to the 200-volt
terminal on the primary side of the transformer. Refer to unit
label diagram for additional information.
Air Baffles — The 48/50PG units with Humid-MiZer™
option are equipped with Motormaster® control to maintain
adequate discharge pressure for proper unit operation during
low ambient operation. Field-fabricated and installed wind baf-
fles may be required. See Optional Humidi-MiZer Dehumidifi-
cation System section on page 45.
Accessory Installation — Check to make sure that all
accessories including space thermostats and sensors have
been installed and wired as required by the instructions and
unit wiring diagrams.
Table 3 — Fan Performance — 48PGD020 — Vertical Supply/Return Units
LEGEND
Boldface indicates field-supplied motor/drive required.
NOTES:
1. Motor drive ranges:
(A) Low Range: 685-939, 4.26 Bhp (208/230 and 460-v), 751-954, 5.75 Bhp (575-v)
(B) Mid-Low Range: 949-1206, 5.75 Bhp
(C) Mid High Range: 941-1176, 8.63 Bhp
(D) High Range: 1014-1297, 11.50 Bhp
All other rpms require field-supplied motor or drive.
2. See page 30 for general fan performance notes.
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
5000 590 1.47 663 1.74 727 2.01 786 2.26 840 2.52
5500 633 1.82 703 2.11 764 2.40 820 2.67 872 2.94
6000 677 2.21 744 2.53 803 2.84 857 3.13 907 3.42
6500 722 2.67 786 3.01 842 3.33 894 3.64 942 3.95
7000 767 3.17 828 3.53 883 3.88 933 4.21 979 4.53
7500 813 3.74 871 4.12 924 4.48 972 4.83 1017 5.18
8000 859 4.36 915 4.77 966 5.15 1012 5.52 1056 5.88
8500 906 5.05 959 5.47 1008 5.87 1053 6.26 1096 6.64
9000 952 5.81 1004 6.25 1051 6.67 1095 7.07 1136 7.47
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
5000 891 2.77 940 3.02 987 3.27 1032 3.52 1076 3.77
5500 921 3.21 968 3.48 1014 3.74 1057 4.01 1099 4.27
6000 954 3.70 999 3.99 1042 4.27 1084 4.55 1125 4.83
6500 988 4.25 1032 4.55 1073 4.85 1114 5.14 1153 5.44
7000 1024 4.85 1066 5.17 1106 5.48 1145 5.79 1183 6.10
7500 1060 5.51 1101 5.84 1140 6.17 1178 6.50 1215 6.82
8000 1098 6.23 1138 6.58 1176 6.92 1213 7.26 1249 7.60
8500 1137 7.01 1175 7.38 1212 7.74 1248 8.09 1283 8.45
9000 1176 7.86 1214 8.24 1250 8.61 1285 8.99 1319 9.36
Bhp — Brake Horsepower Input to Fan
A
A
A
A
A
B
B
B
C
C
C
C
C
B
A
B
C
D
B
B
B
B
C
C
C
D
D
D

Carrier 50PG20 Specifications

General

Brand	Carrier
Model	50PG20
Category	Air Conditioner
Language	English