Lennox ALLIED Commercial TCA180H2B High Manual Download Page 43 | Manualshive

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Page 43

VIII−Wiring Diagrams and Sequence of Operation

TCA180S, 180H 210S, 240S UNIT DIAGRAM

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Summary of Contents for ALLIED Commercial TCA180H2B High

Page 1: ...at each corner Refer to the installation instructions for the prop er rigging technique WARNING Improper installation adjustment alteration service or maintenance can cause property damage person al...

Page 2: ...andard Static 3 hp 2 2 kW 3 hp 2 2 kW 5 hp 3 7 kW 5 hp 3 7 kW High Static 5 hp 3 7 kW 5 hp 3 7 kW 7 5 hp 5 6 kW 7 5 hp 5 6 kW Max usable motor output US Only Low Static 3 45 hp 2 6 kW 3 45 hp 2 6 kW 5...

Page 3: ...6 kW 7 5 hp 5 6 kW 10 hp 7 5 kW High Static 10 hp 7 5 kW 10 hp 7 5 kW N A Max usable motor output US Only Low Static 5 75 hp 4 3 kW 5 75 hp 4 3 kW 8 63 hp 6 4 kW Standard Static 8 63 hp 6 4 kW 8 63 h...

Page 4: ...60 866 3 86 898 4 11 926 4 36 954 4 61 984 4 90 1013 5 19 1038 5 44 NOTE Bold To operate in this range unit must be ordered with High Static Drive and drive kit 3 must be ordered separately for field...

Page 5: ...his range unit must be ordered with High Static Drive and drive kit 7 must be ordered separately for field installation 1 40 to 2 50 in w g TCA210 Air Volume cfm External Static in w g Covered By Driv...

Page 6: ...811 4 87 845 5 22 879 5 57 910 5 94 941 6 31 970 6 67 999 7 02 1027 7 38 1054 7 74 1079 8 08 1104 8 41 1 40 to 2 50 in w g TCA240 Air Volume cfm External Static in w g Covered By Drive At Nominal Air...

Page 7: ...1155 10 45 1178 10 83 11500 915 7 40 948 7 88 980 8 35 1010 8 80 1040 9 25 1068 9 68 1095 10 10 1118 10 53 1140 10 95 1165 11 40 1190 11 85 1210 12 23 12000 935 7 95 963 8 35 990 8 75 1020 9 23 1050...

Page 8: ...85 6600 3115 92 229 77 191 67 167 54 134 6800 3210 99 246 83 206 72 174 58 144 7000 3305 1 03 256 87 216 76 189 49 122 41 102 36 90 62 154 40 99 7200 3400 1 09 271 92 229 80 199 66 164 7400 3490 1 15...

Page 9: ...0 11 5 7 5 8 6 1045 1285 Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required Maximum usable output of motors furnished...

Page 10: ...49 1 3 249 Full Load Amps each total 4 8 9 6 2 6 5 2 2 0 4 0 Locked Rotor Amps each total 9 4 18 8 4 8 9 6 3 8 7 2 Service Outlet 115V GFI 15 Amps 15 Amps 15 Amps Indoor Blower Motor Horsepower 3 5 7...

Page 11: ...2 65 68 60 kW 164 172 181 82 85 90 66 68 72 without power exhaust 71 77 84 35 37 41 28 30 33 2 Maximum Overcurrent Protection with power exhaust 0 kW 90 90 110 40 45 50 35 35 40 15 kW 90 90 110 40 45...

Page 12: ...W 94 100 107 45 48 52 37 39 42 15 kW 94 100 107 45 48 52 37 39 42 30 kW 110 118 127 55 58 63 44 47 50 45 kW 155 163 172 77 81 85 62 65 68 60 kW 164 172 181 82 85 90 66 68 72 90 kW 236 244 253 118 122...

Page 13: ...94 97 101 without power exhaust 83 89 97 41 43 47 30 32 35 2 Maximum Overcurrent Protection with power exhaust 0 kW 100 110 125 45 50 60 35 40 45 15 kW 100 110 125 45 50 60 35 40 45 30 kW 110 125 150...

Page 14: ...26 130 97 101 103 without power exhaust 100 107 114 49 52 55 38 40 42 2 Maximum Overcurrent Protection with power exhaust 0 kW 125 125 150 60 60 70 45 50 50 15 kW 125 125 150 60 60 70 45 50 50 30 kW 1...

Page 15: ...01 103 without power exhaust 100 108 114 52 55 58 41 44 46 2 Maximum Overcurrent Protection with power exhaust 0 kW 110 125 150 60 60 70 45 50 50 15 kW 110 125 150 60 60 70 45 50 50 30 kW 125 150 150...

Page 16: ...97 101 103 without power exhaust 108 116 127 55 58 61 45 47 49 2 Maximum Overcurrent Protection with power exhaust 0 kW 125 150 150 60 70 70 50 50 60 15 kW 125 150 150 60 70 70 50 50 60 30 kW 125 150...

Page 17: ...c Motor Drive Combination stock unit f f f f High Static Motor Drive Combination f f f f 1 Standard to Low Static Conversion Kit Drive Kit A C1DRKT044 1 x 1 Standard to Low Static Conversion Kit Drive...

Page 18: ...metric Relief Dampers Hood Furnished LAGEDH18 24 x x x x Outdoor Air Dampers Hoods Damper Section down flow Automatic Order Hood Separately T1DAMP20C 1 Damper Section down flow Manual Order Hood Separ...

Page 19: ...AIN FILTERS SIX 24 X 24 X 2 ECONOMIZER DAMPERS OPTIONAL ELECTRIC HEAT OPTIONAL BLOWERS MCC A45 CONTROL OUTDOOR FANS COMPRESSORS 4TH COMPRESSOR ON 210H 240H 300H UNITS ONLY FILTER DRIERS FIGURE 2 TCA C...

Page 20: ...MCC board A45 For thermostats with occupied and un occupied modes a factory installed jumper across termi nals A1 and A2 should be removed Unit wiring is designed for a three stage thermostat For two...

Page 21: ...terminal designations Tables 4 5 6 and 7 show pin terminal designations Features The MCC A45 is equipped with a green LED for board sta tus See table 1 for LED flash codes While in the cooling mode th...

Page 22: ...switch selected Make sure switches are set correctly Refer to figure 5 Flashes Rapidly Simultaneous heat and cool demands Check thermostat and wiring Press pushbutton and immediately release to overri...

Page 23: ...nsformer T1 C Ground K3 From Transformer T18 Y3 To Processor micro chip TABLE 5 P113 TERMINAL DESIGNATIONS Terminal Function S49 Relay KA To Freeze Stat S49 From Freeze Stat K10 Relay KA To Outdoor Fa...

Page 24: ...ontinue to operate 3 Low Ambient Switches optional S11 S84 S85 all units S94 210H 240H 300S only The low ambient switch is an optional field installed auto reset N O pressure switch which allows for m...

Page 25: ...D REFRIGERANT CIRCUITS DETAIL FIGURE 7 B1 COMPRESSOR B1 B13 S7 optional S28 optional SUCTION LINE OPTIONAL HIGH PRESSURE SWITCH S4 DISCHARGE LINE FREEZESTAT 3 ONE FOR EACH STAGE OF COIL LOCATED ON RET...

Page 26: ...GERANT CIRCUITS DETAIL FIGURE 8 COMPRESSOR B1 B20 S7 S28 S96 B13 DRIERS 4 FREEZESTAT 4 ONE FOR EACH STAGE OF COIL LOCATED ON RETURN BEND SUCTION LINE DISCHARGE LINE OPTIONAL HIGH PRESSURE SWITCH S4 PR...

Page 27: ...toward outside of unit When pulling the base out further than 12 305mm disconnect wir ing to K3 blower contactor T1 T2 and T3 Pull wiring toward blower to allow enough slack to slide the base out furt...

Page 28: ...rce below these values indicates an underten sioned belt A force above these values indicates an overtensioned belt MEASURE BELT TENSION FIGURE 10 DEFLECTION 1 64 PER INCH OF SPAN OR 1 5mm PER 100mm O...

Page 29: ...t Hat Section Figure 13 3 Electric Heat Relay K9 All TCA series units with electric heat use an electric heat relay K9 K9 is a N O DPDT pilot relay intended to electrically iso late the unit s 24V cir...

Page 30: ...through F3 8 10 Terminal Strip TB3 Electric heat line voltage connections are made to terminal strip TB3 or a fuse block on some models located in the up per left corner of the electric heat vestibule...

Page 31: ...EHA156S 15 208 230V 60 Amp 250V 60 Amp 250V 460V 50 Amp 600V 575V 40 Amp 600V 2 EHA360 22 5 45 kW Total or 2 EHA156 22 5 208 230V 50 Amp 250V 25 Amp 250V 50 Amp 250V 25 Amp 250V 460V 25 Amp 600V 15 Am...

Page 32: ...ONTACTOR K15 SECOND STAGE ELECTRIC HEAT CONTACTOR K16 FIRST HEAT SECTION LEFT SIDE SECOND HEAT SECTION RIGHT SIDE FUSE F3 F3 1 FUSE F3 F3 2 FUSE F3 F3 3 FUSE F3 F3 4 TERMINAL STRIP TB3 FIRST STAGE ELE...

Page 33: ...Blower Compartment Blower Belt Adjustment B Cooling Startup The thermostat specified for use on this unit has three cool ing outputs 1 Remove coil covers before starting unit 2 Initiate first and seco...

Page 34: ...the outdoor ambient temperature 4 Apply the outdoor temperature to tables 9 through 15 to determine normal operating pressures 5 Compare the normal operating pressures to the pres sures obtained from...

Page 35: ...79 309 79 317 81 307 80 115 F 361 81 346 80 358 82 345 82 Charge Verification Approach Method 1 Using the same thermometer compare liquid temper ature to outdoor ambient temperature Approach Temperatu...

Page 36: ...Wheel Annually inspect supply air blower wheel for accumulated dirt or dust Turn off power before attempting to remove ac cess panel or to clean blower wheel D Evaporator Coil Inspect and clean coil a...

Page 37: ...22 Refer to the roof mounting frame installa tion instructions for proper plenum construction and attach ment FIGURE 21 ASSEMBLED ROOF MOUNTING FRAME FRONT END END BACK CENTER SUPPORTS TWO PIECES EAC...

Page 38: ...nt requiring more fresh air See figure 24 FIGURE 24 A6 ENTHALPY CONTROLLER A B C D Open Min Pos FREE COOLING SETPOINT A Completely counterclockwise D Completely clockwise OUTDOOR AIR SUITABLE LED Free...

Page 39: ...alf way when CO2 rises above setpoint Adjust the DCV MAX potentiometer to the approximate setting specified by the controls con tractor Refer to figure 24 Note DCV Max must be set higher than economiz...

Page 40: ...here the two lines meet Read the percent of fresh air intake on the side 7 If fresh air percentage is less than desired adjust thumbwheel higher If fresh air percentage is more than desired adjust thu...

Page 41: ...OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING FREE COOL LED OFF THERMOSTAT DEMAND DAMPER POSITION MECHANICAL COOLING UNOCCUPIED OCCUPIED Off Closed Closed No G Closed Minimum No Y1 Closed Minimum Stage...

Page 42: ...able for TCA180 300 units are power ex haust fans used in downflow applications only The fans re quire optional down flow gravity exhaust dampers and T1ECON economizers Power exhaust fans provide exha...

Page 43: ...Page 43 VIII Wiring Diagrams and Sequence of Operation TCA180S 180H 210S 240S UNIT DIAGRAM...

Page 44: ...rough N C freezestat S49 optional N C high pressure switch S4 to energize compressor contactor K1 8 N O contacts K1 close energizing compressor B1 9 Optional N O low ambient switch S11 closes to energ...

Page 45: ...Page 45 TCA210H 240H 300S UNIT DIAGRAM...

Page 46: ...energized 8 N O contacts K1 closes energizing compressor B1 9 Optional N O low ambient switch S11 closes to energize condenser fan relay K10 10 N O contacts K10 1 and K10 2 close energizing condenser...

Page 47: ...Page 47 EHA 15 30 45 60 90kW Y VOLTAGE...

Page 48: ...Page 48 EHA 15 30 45 60 90KW G J M...

Page 49: ...nts to be energized SECOND STAGE HEAT With the first stage heat operating an additional heat ing demand initiates at W2 in the thermostat 4 Relay K19 is energized N O contacts K19 1 close en ergizing...

Page 50: ...al strip TB1 found on the main control module A45 energize thermostat components with 24VAC OPERATION 2 The main control module A45 receives data from the electronic thermostat A2 Y1 Y2 Y3 W1 W2 G OCP...

Page 51: ...tactor K3 is ener gized OPERATION 2 Enthalpy sensor A7 and A62 if differential enthalpy is used communicates to the economizer control module A6 when to power the damper motor B7 3 Economizer control...

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