Carrier Gemini 38AU07 Series Installation Instructions Manual

Contents

16Installing Weatherproof CoverA weatherproof while in use cover for the factory installedconvenience outlets is now required by UL standards. Thiscover cannot be factory mounted due its depth; it must be in-stalled at unit installation. For shipment, the convenience out-let is covered with a blank cover plate.The weatherproof cover kit is shipped in the unit’s controlbox. The kit includes the hinged cover, a backing plate andgasket.DISCONNECT ALL POWER TO UNIT AND CONVE-NIENCE OUTLET.Remove the blank cover plate at the convenience outlet;discard the blank cover.Loosen the two screws at the GFCI duplex outlet, until ap-proximately 1/2 -in. (13 mm) under screw heads are exposed.Press the gasket over the screw heads. Slip the backing plateover the screw heads at the keyhole slots and align with thegasket; tighten the two screws until snug (do not overtighten).Mount the weatherproof cover to the backing plate asshown in Fig. 16. Remove two slot fillers in the bottom of thecover to permit service tool cords to exit the cover. Check forfull closing and latching.ALL UNITSVoltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate. See Tables13-16. On 3-phase units, voltages between phases must be bal-anced within 2% and the current within 10%. Use the formulashown in the legend for Tables 13-16, Note 4 (see page 18) todetermine the percent of voltage imbalance. Operation on im-proper line voltage or excessive phase imbalance constitutesabuse and may cause damage to electrical components. Suchoperation would invalidate any applicable Carrier warranty.Fig. 16 — Weatherproof Cover InstallationFIELD CONTROL WIRING38AU unit control voltage is 24 v. See Fig. 17-19 for typi-cal field control connections and the unit’s label diagram forfield-supplied wiring details. Route control wires to the38AU unit through the opening in unit’s end panel to the con-nections terminal board in the unit’s control box.Remainder of the system controls connection will vary ac-cording to the specific construction details of the indoor section(air handler or packaged fan coil). Fig. 20 (38AUZ) and 21(38AUD) depict typical connections to a Carrier 40RU fan coilunit. Plan for field connections carefully and install controlwiring correctly per the project plan. Additional componentsand supplemental transformer accessory may be required.The 38AU unit requires an external temperature control de-vice. This device can be a thermostat (field-supplied) or a Pre-mierLink controller (available as a field-installed accessory, foruse on a Carrier Comfort® Network or as a stand alone control).WARNINGELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personal injuryor death.Using unit-mounted convenience outlets: Units with unit-mounded convenience outlet circuits will often require thattwo disconnects be opened to de-energize all power to theunit. Treat all units as electrically energized until the conve-nience outlet power is also checked and de-energization isconfirmed. Observe National Electrical Code Article 210,Branch Circuits, for use of convenience outlets.COVER - WHILE-IN-USEWEATHERPROOFBASEPLATE FORGFCI RECEPTACLEGASKETGFCI RECEPTACLENOT INCLUDEDTOPTOPTOPWET LOCATIONSWET LOCATIONS