Carrier 40QNB Installation, Start-up And Service Instructions Manual
Also see for 40QNB018: Owner's manualInstallation, Start-Up and Service Instructions
                            |
Step 6 — Make Electrical Connections — Be surefield wiring complies with local building codes and NEC,and unit voltage is within limits shown in Table 6. Refer toTable 7 for units with electric heat.Contact local power company for correction of improperline voltage.To avoid personal injury or damage to unit, do not makeelectrical connections until all power sources are shutdown, locked out, and tagged off. Failure to do so couldresult in personal injury or unit damage.Operation of unit on improper line voltage constitutesabuse and could affect warranty. Refer to Table 6 forpermissible operating limits. Do not install unit in sys-tem where voltage may fluctuate above or below per-missible limits.NOTE: Use type NM power cable only (per NEC; providedfor fan coil units only) between disconnect switch and unit.NOTE: Install branch circuit disconnect per NEC of ad-equate size to handle unit starting current. Locate disconnectwithin sight from and readily accessible from unit, perSection 440-14 of NEC. Some codes allow indoor unit toshare disconnect with outdoor unit if disconnect can be locked;check local code before installing in this manner. To makeelectrical connections:1. Remove the screws holding the front cover of the fan coilunit, and remove front cover. Save screws and screwcovers for reinstallation.2. Remove control box strain relief clamp (see Fig. 13).3. Remove any factory test leads still connected to the powerterminal box. These leads (if applicable) are for factorytesting only and cannot be used for power connections.4. Route the factory-supplied ground and power wires fromterminal block 1 (TB1) to the field-supplied disconnectswitch.According to NEC and most local codes, the unitmust have an uninterrupted, unbroken ground to mini-mize personal injury if an electrical fault should oc-cur. The ground may consist of electrical wire ormetal conduit when installed in accordance with ex-isting electrical codes. Failure to follow this warn-ing could result in an electric shock, fire, or death.5. Route factory-supplied line power leads (see Fig. 14) fromfield-supplied, indoor unit disconnect to the fan coil unitTB1 (see Fig. 14 and 15). Run wire through the strainrelief on the control box (see Fig. 13). When routing wirein the fan coil unit, keep the wire away from refrigerantand condensate piping and any sharp edges on the unit.Do not short circuit the 40QN transformer − it isfused. The transformer can be short circuited by con-necting the wrong wires or by touching a live wireto the side of a grounded control box.Table 6 — Electrical DataINDOORUNIT40QNV (Single-Ph, 60 Hz)OPERATING VOLTAGE* FAN WATTS MCAMAX FUSEOR HACR TYPECKT BKR AMPSMax Min LRA FLAB018208/230 253 187 3.2 0.53 94 10.9 15B024H018H024LEGENDFLA — Full Load AmpsHACR — Heating, Air Conditioning, and RefrigerationLRA — Locked Rotor AmpsMCA — Minimum Circuit Amps per NEC Section 430-24NEC — National Electrical Code*Permissible limits of the voltage range at which unit will operate satisfactorily.Table 7 — Electric Heater DataINDOOR UNIT VOLTS-Ph (60 Hz) INPUT AMPS kW AT 230 V MIN WIRE SIZE (AWG)40QNH018 230-1 7.8 1.8 1440QNH024 230-1 7.8 1.8 14LEGENDAWG — American Wire Gage12 |
Related manuals for Carrier 40QNB018
manualsdatabase
Your AI-powered manual search engine