Controls Quick Start; Thermostat Control; Space Temperature Sensor Control; Space Humidity Control -- Thermidistat - Carrier 50PG20-28 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Table 34 -- Fan Rpm At Motor Pulley Settings* -- 50PG20-28
50PG DRIVE
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
20 and 24 High Range Vertical
(230 and
460 volt) Low Range HodzontN
Mid-Low Range HodzontN
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
20 and 24 High Range Vertical
(575 Volt) Low Range HodzontN
Mid-Low Range HodzontN
Mid-High Range Horizontal
High Range Horizontal
Low Range Vertical
Mid-Low Range Vertical
Mid-High Range Vertical
28 High Range Vertical
(all voltages) Low Range HodzontN
Mid-Low Range HorizontN
Mid-High Range Horizontal
High Range Horizontal
*Approximate fan rpm shown
NOTE: Factory pulley speed setting is at 3 turns open.
MOTOR PULLEY TURNS OPEN
O _ 1 11t2 2 21/2 3 3q 2 4 41/2 5 5tt2 6
685 706 727 749 770 791 812 833 854 876 897 918 939
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
685 706 727 749 770 791 812 833 854 876 897 918 939
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206
941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 1176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
751 768 785 802 819 836 853 869 886 803 920 937 954
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
751 768 785 802 819 836 853 868 886 903 920 937 954
949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206
941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 1176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
687 703 718 734 749 765 780 796 811 827 842 858 873
805 822 839 856 872 889 906 923 940 857 973 980 I007
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
687 703 718 734 749 765 780 796 81I 827 842 858 873
805 822 839 856 872 889 906 923 940 957 973 980 I007
941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 1176
1014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297
CONTROLS QUICK START
The tbllowing infonnation will provide a quick guide to
setting up and confignring the 48/50PG series units with
('omfbrtLink
TM
controls. Unit controls are pre-configured at
the factory tbr factory-installed options. Field-installed acces-
sories will require configuration at start-up. Additionally,
specific job requirements may require changes to delhult
configuration values. See the CCN and Display parameter
tables and other sections of these instructions for more details.
Thermostat Control- Wire accessory thermostat to
the conesponding R, Y1, Y2, Wt, W2, and G terminals on the
field connection terminal board located at the unit control box.
The Unit Control
Type configuration, Configuration
--+UNIT---_U.(TL, defimlt value is for Thermostat (2) so there
is no need to configure this item.
Space Temperature Sensor Control -- Direct
Wired (T-55 or T-56) -- Wire accessoryspace tempera-
ture sensor(s) to the T-55 terminals on the field connection
tenninat board located at the unit control box. Rel}r to Field-
Installed Accessories section.
The l_Mt Control Type configuration, Configuration
---_UNIT--_U.(TL, must be set to Space Sensor (3). The jumper
wire in the installer's packet must be connected bewveen R and
W1 for heating mode to operate.
Space Temperature Sensor Control -- CCN
(T-58)
-- Install the T-58 colrnnunicating thermostat. Con-
nect the CCN colrnnunication bus fiom the T-58 to the CCN
terminals on the field connection tenninat board located at the
unit control box. Configure the 48/50PG unit CCN communi-
cation element number, bus numbei; and baud rate. Configure
the T-58 thermostat CCN communication dement number and
also configure the T-58 with the 48/50PG unit element number.
The tMt Control Type configuration, Configuration
---_UNIT--_U.(TL, must be set to Space Sensor (3). The jumper
wire in the instatler's packet must be connected bewveen R and
W1 for heating mode to operate.
Space Temperature Control -- CCN Link-
age -- The CCN colrnnunication must be properly configured
for the 48/50PG unit and all devices. Linkage configuration is
automatically done by the supervisory CCN Linkage device.
The Unit Control Type configuration, Configuration
---_UNIT---_U..CTL m ust be set to Space Sensor (3). The jumper
wire in the instalter's packet must be connected between R and
W1 for heating mode to operate.
Installation of an accessory supply air temperature (SAT)
sensor in the supply duct is recommended for Linkage applica-
tions. A supply duct SAT measurement is valid for heating
mode display, while the factory-standard internal SAT is not
valid for heating due to its location upstream of the heating sec-
tion. When installing the supply duct SAT, the heating mode
display is enabled by setting (bnfigm'ation---_HEAT---agAT.H
to ENBL.
Space Humidity Control -- Humidistat -- Wire
the Humidistat accessory to terminals Humidistat 1and 2 locat-
ed on the field connection tenninal strip in the bottom of the
control box. The Space Humidity Switch setting is located at
(bnfiguration--_Unit--_RH.SVK The factory default for units
with Humidi-MiZer
TM
system is 1 (normally open).
Space Humidity Control -- Thermidistat
TM
--
Wire the Thennidistat accessory Dehum output to tenninat
Humidistatl located on the field connection terminal strip in
the bottom of the control box. The Space Humidity Switch set-
ting is located at (bnfiguration-->Unit-->RH, gVKThe factory
default for units with Humidi-MiZer system is 1 (normally
open).
Space Humidity Control- Relative Humidity
Sensor -- Wire the humidity sensor to terminals 3 () and
4 (+) located on the field connection terminal strip in the
bottom of the control box. The RH Sensor on OAQ Input set-
ting is located at (bnfigttration--_Unit--_RH.S. The setting
must be configured to YES to use the relative humidity sensor.
CCN Communication -- Configure
(bnfigttration-->
C(W_,C(DC_A to desired element number. (Default is 1.) Con-
l]gure
(bnfiguration_'(W_'CN.B to desired bus number.
(Dethult is 0.) Configure (bnfiguration_'CN---_BAUD to
desired code number for baud rate. (Default is 3 9600 baud.)
Accessories -- See the Field-Installed Accessories sec-
tion, control connection tables, and CCN or Display parmneter
tables for required connections and configurations.
Service Test -- The Service Test function can be used to
verit) proper operation of compressors, heating stages,
indoor tan, outdoor _ans, power exhaust tans, economizer,
Humidi-MiZer system, and alann relay. Use of Selaqce Test is
recolrnnended at initial system start-up and during trouble-
shooting.
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