Assessments - 3, GPA: 4
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10 — Field Power Wiring Connections FIELD CONTROL WIRING - Install a Carrier-approved accessory thermostat assembly according to the installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature. Route thermostat cable or equivalent single leads of no. 18 AWG (American Wire Gage) colored wire from subbase terminals through conduit in unit to low-voltage connections as shown on unit label wiring diagram and in Fig. 11. NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. Set heat anticipator settings as indicated in Table 3. Settings may be changed slightly to provide a greater degree of comfort for a particular installation. Refer to accessory remote control instructions as required. THERMOSTAT ASSEMBLY REMOVABLE JUMPER RC Y1 Y2 |w3 ÇI Op [cf^x] ["r] i^i fà\ W1 -ptr -jL-yL--J±ri W2 |g| c x| § I s § PNK BLK BRN WHT Fig. 11 — Field Control Thermostat Wiring 7 Table 2 — Electrical Data UNIT 50HJ VOLTAGE COMPRESSOR CONDENSER EVAPORATOR ACCESSORY/OPTIONAL V-PH-HZ RANGE No. 1 No. 2 FAN MOTOR FAN MOTOR ELECTRIC HEATERS* Min Max RLA LRA RLA LRA Qty FLA HP FLA FLA kW MCA MOCPf 208/230-3-60 187 253 49 3 191 - - 2 77 3 105 39/ 45 72/ 82 117/135 14/19 26/34 42/56 88/ 88 88/ 88 103/116 159/148 100/100 100/100 110/125 175/175 015 460-3-60 414 508 22 1 86 - - 2 33 3 48 18 39 66 15 32 55 39 39 55 72 45 45 60 80 575-3-60 518 632 179 69 - - 2 26 3 3 9 37 37 32 52 35 60 208/230-3-60 187 253 43 9 170 43 9 170 2 54 (ea) Tk 24 2/22 0 72/ 82 117/135 156/180** 26/34 42/56 56/75** 134/132 134/132 177/163 186/208** 175/175 175/175 200/175 200/225** 024 - 62 80 460-3-60 414 508 199 77 199 77 2 27 (ea) 7’/2 11 0 39 66 96** 55 80** 62 80 110** 80 90 110** 575-3-60 518 632 15 9 62 159 62 2 34 (ea) 7M> 90 - - 52 60 LEGEND FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration LRA — Looked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection NEC — National Electrical Code RLA — Rated Load Amps ‘Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v and 575 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly This is the maximum size permissible; smaller fuse size may be used where conditions permit tFuse or HACR circuit breaker "Heaters are field installed only NOTES: 1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker The Canadian units may be fuse or circuit breaker 2 MCA calculation for units with electric heaters over 50 kW = (1.25 x IFM amps) + (1 00 x heater FLA). Table 3 — Heat Anticipator Settings UNIT VOLTAGES kW STAGE 1 STAGE 2 14/17 40 _ 208/230 26/31 40 40 42/52 66 40 50HJ 15 40 015 460 30 40 40 51 40 66 575 37 40 .66 26/31 40 66 208/230,575-3-60 42/52 .66 40 50HJ 56/69 66 66 024 30 40 40 460-3-60 51 40 66 73 66 66 Step 7 — Make Outdoor-Air Inlet Adjustments MANUAL OUTDOOR-AIR DAMPER - All units (except those equipped with a factory-installed economizer) have a manual outdoor-air damper to provide ventilation air. Damper can be preset to admit up to 25% outdoor air into return-air compartment. To adjust, loosen securing screws and move damper to desired setting Then retighten screws to secure damper (Fig. 12). OPTIONAL FACTORY-INSTALLED ECONOMIZER Economizer Motor Control Module (Fig. 13-15) — Set to the "D" setting (Fig. 14) The control module is located on the economizer motor. See Fig. 13 and 15. Damper Vent Position Setting 1. Set fan switch at ON position (continuous fan operation) and close night switch if used. 2. Set system selector switch to OFF position. 3. Turn adjustment screw slowly until dampers assume desired vent position. Do not manually operate economizer motor since damage to motor will result. NOTE: Refer to accessory installation instructions included with the field-installed economizer for installation information. Also see Accessory Field-Installed Economizer Adjustment section on page 10. Step 8 — Install Outdoor-Air Hood — The same type of factory-installed hood is used on units with 25% air ventilation and units with an economizer. NOTE: The hood top panel, upper and lower filter retainers, hood drain pan, baffle (024 only), and filter support bracket are secured opposite the condenser end of the unit. The screens, hood side panels, remaining section of filter support bracket, seal strip, and all other hardware are in a package located inside the return-air filte...