Carrier CAS072 Installation, Start-up And Service Instructions Manual

16 Specifications subject to change without notice. CAS-072-153-01SI Rev. AFor wire runs up to 50 ft (15 m), use no. 18 AWG (AmericanWire Gage) insulated wire (35°C minimum). For 50 to 75 ft.(15 to 23 m), use no. 16 AWG insulated wire (35°C mini-mum). For over 75 ft (23 m), use no. 14 AWG insulated wire(35°C minimum). All wire sizes larger than no. 18 AWG can-not be directly connected to the thermostat and will requirea junction box and splice at the thermostat.Fig. 17 — Dual Circuit Thermostat Connections —CAS123/153EXTERNAL DEVICESThe CAS control transformers provide 24-v NEC Class 2power sources to energize external control devices. Thesedevices will include the indoor fan motor contactor (or con-trol relay) or the unit control board in the fan coil unit. Thesedevices may also include liquid line solenoid valve (two onCAS123/153 model), economizer control relay, supplemen-tal electric heater contactors or control relays and other de-vices selected by system designer.Control transformer TRAN1 provides control power throughterminal R to C on the field connection terminal strip TB forsupply fan motor interlock. This source may also be used toenergize economizer control relay and electric heater con-tactors or relays. Maximum available power is 20 va. Checkconcurrent loadings by external control devices. If the maxi-mum concurrent loading exceeds 20 va, purchase and in-stall the accessory Transformer-Relay package (availablefor 208/230 and 460-v units).CAS123/153 OnlyControl transformer TRAN3 provides control power throughterminals A1 (9) and A2 (10) to C for liquid line solenoids.Maximum available power is 75 va. These outputs areswitched ON/OFF by the Solenoid Valve Relays.(Note 1)(Note 2)(Note 3)(Note 3)1. Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2.2. Connect only if thermostat requires 24-vac power source.3. Connect W1 and W2 if supplemental heaters are installed.Field WiringLEGENDNOTES:Table 14 — CAS072/091/121/151 Single Circuit Electrical Data without Powered Convenience OutletaNOTE(S):a See Legend and Notes for Tables 14-17UNIT SIZENUMBEROFSTAGESNOMINALPOWERSUPPLYV-Ph-HzVOLTAGERANGECOMPRESSOR OFM POWER SUPPLY DISCONNECT SIZENo. 1 No. 2Min Max RLA LRA RLA LRA Qty FLA (ea) MCAFuse orHACRBrkrFLA LRACAS072*G2 575-3-60 518 633 6.3 55 — — 2 0.7 10 15 9 592 208/230-3-60 187 253 17.5 136 — — 2 1.5 25/25 30/30 24/24 142/1422 460-3-60 414 506 8.4 66 — — 2 0.8 13 20 12 70CAS091*G2 575-3-60 518 633 9.9 78 — — 2 0.7 14 20 13 822 208/230-3-60 187 253 26.8 164 — — 2 1.5 37/37 60/60 34/34 170/1702 460-3-60 414 506 12.6 100 — — 2 0.8 18 25 16 104CAS121*M2 575-3-60 518 633 11.4 94 — — 2 0.7 16 25 15 982 208/230-3-60 187 253 33.2 240 — — 2 1.5 45/45 60/60 42/42 246/2462 460-3-60 414 506 15.1 130 — — 2 0.8 21 30 19 134CAS151*M2 575-3-60 518 633 6.6 55 6.6 55 2 0.7 17 20 17 1142 208/230-3-60 187 253 19.6 136 19.6 136 2 1.5 48/48 60/60 49/49 278/2782 460-3-60 414 506 8.2 66 8.2 66 2 0.8 21 25 21 136