Carrier 50PG20-28 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for 48PG20---28: User's information manual User's information manual Installation and service instructions

Carrier 50PG20-28 Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 35 page image

Table 34 -- Fan Rpm At Motor Pulley Settings* -- 50PG20-2850PG DRIVELow Range VerticalMid-Low Range VerticalMid-High Range Vertical20 and 24 High Range Vertical(230 and460 volt) Low Range HodzontNMid-Low Range HodzontNMid-High Range HorizontalHigh Range HorizontalLow Range VerticalMid-Low Range VerticalMid-High Range Vertical20 and 24 High Range Vertical(575 Volt) Low Range HodzontNMid-Low Range HodzontNMid-High Range HorizontalHigh Range HorizontalLow Range VerticalMid-Low Range VerticalMid-High Range Vertical28 High Range Vertical(all voltages) Low Range HodzontNMid-Low Range HorizontNMid-High Range HorizontalHigh Range Horizontal*Approximate fan rpm shownNOTE: Factory pulley speed setting is at 3 turns open.MOTOR PULLEY TURNS OPENO _ 1 11t2 2 21/2 3 3q 2 4 41/2 5 5tt2 6685 706 727 749 770 791 812 833 854 876 897 918 939949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I1761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297685 706 727 749 770 791 812 833 854 876 897 918 939949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 11761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297751 768 785 802 819 836 853 869 886 803 920 937 954949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I1761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297751 768 785 802 819 836 853 868 886 903 920 937 954949 970 992 1013 1035 1056 1078 1099 1120 1142 1163 1185 I206941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 11761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297687 703 718 734 749 765 780 796 811 827 842 858 873805 822 839 856 872 889 906 923 940 857 973 980 I007941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I1761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297687 703 718 734 749 765 780 796 81I 827 842 858 873805 822 839 856 872 889 906 923 940 957 973 980 I007941 961 980 1000 1019 1039 I059 I078 1098 1117 1137 1156 11761014 I038 106I 1085 1108 1132 1156 1179 1203 1226 1250 1273 I297CONTROLS QUICK STARTThe tbllowing infonnation will provide a quick guide tosetting up and confignring the 48/50PG series units with('omfbrtLink TM controls. Unit controls are pre-configured atthe factory tbr factory-installed options. Field-installed acces-sories will require configuration at start-up. Additionally,specific job requirements may require changes to delhultconfiguration values. See the CCN and Display parametertables and other sections of these instructions for more details.Thermostat Control- Wire accessory thermostat tothe conesponding R, Y1, Y2, Wt, W2, and G terminals on thefield 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 thereis no need to configure this item.Space Temperature Sensor Control -- DirectWired (T-55 or T-56) -- Wire accessoryspace tempera-ture sensor(s) to the T-55 terminals on the field connectiontenninat 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 jumperwire in the installer's packet must be connected bewveen R andW1 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 CCNterminals on the field connection tenninat board located at theunit control box. Configure the 48/50PG unit CCN communi-cation element number, bus numbei; and baud rate. Configurethe T-58 thermostat CCN communication dement number andalso 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 jumperwire in the instatler's packet must be connected bewveen R andW1 for heating mode to operate.Space Temperature Control -- CCN Link-age -- The CCN colrnnunication must be properly configuredfor the 48/50PG unit and all devices. Linkage configuration isautomatically done by the supervisory CCN Linkage device.The Unit Control Type configuration, Configuration---_UNIT---_U..CTLmust be set to Space Sensor (3). The jumperwire in the instalter's packet must be connected between R andW1 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 heatingmode display, while the factory-standard internal SAT is notvalid for heating due to its location upstream of the heating sec-tion. When installing the supply duct SAT, the heating modedisplay is enabled by setting (bnfigm'ation---_HEAT---agAT.Hto ENBL.Space Humidity Control -- Humidistat -- Wirethe Humidistat accessory to terminals Humidistat 1and 2 locat-ed on the field connection tenninal strip in the bottom of thecontrol box. The Space Humidity Switch setting is located at(bnfiguration--_Unit--_RH.SVK The factory default for unitswith Humidi-MiZer TM system is 1 (normally open).Space Humidity Control -- Thermidistat TM --Wire the Thennidistat accessory Dehum output to tenninatHumidistatl located on the field connection terminal strip inthe bottom of the control box. The Space Humidity Switch set-ting is located at (bnfiguration-->Unit-->RH, gVKThe factorydefault for units with Humidi-MiZer system is 1 (normallyopen).Space Humidity Control- Relative HumiditySensor -- Wire the humidity sensor to terminals 3 () and4 (+) located on the field connection terminal strip in thebottom of the control box. The RH Sensor on OAQ Input set-ting is located at (bnfigttration--_Unit--_RH.S. The settingmust 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 todesired 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 parmnetertables for required connections and configurations.Service Test -- The Service Test function can be used toverit) proper operation of compressors, heating stages,indoor tan, outdoor _ans, power exhaust tans, economizer,Humidi-MiZer system, and alann relay. Use of Selaqce Test isrecolrnnended at initial system start-up and during trouble-shooting.35