Bard WG3S2-A Installation Instructions Manual

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Bard WG3S2-A Installation Instructions Manual Manual pdf 19 page image

Manual 2100-587BPage 19 of 59ELECTRICAL GROUNDINGWhen installed, the furnace must be electricallygrounded in accordance with local codes or in theabsence of local codes, with the National ElectricalCode, ANSI/NFPA 70, or Canadian Electrical Code,CSA22.1, latest edition. Use a copper wire from greenground wire on the furnace to a grounded connection inthe service panel or a properly driven and electricallygrounded ground rod. See Table 1 for proper groundwire size.FIELD INSTALLED EQUIPMENTWiring to be done in the field between the furnace anddevices not attached to the furnace, or between separatedevises which are field installed and located, shallconform with the temperature limitation for Type Twire {63 degrees F rise (36 degrees C)} when installedin accordance with the manufacturer’s instructions.INSTALLATION OF FLEXIBLE CONDUITTHROUGH RETURN AIR OPENINGNOTE: To allow proper clearance between thecontrol panel and any vent options, 90°conduit fittings must be used on the back ofthe control panel.INSTALLING CONDUIT (See Figure 9.)1. Remove conduit access panel if required to gainaccess to area behind control panel.2. Remove low voltage and high voltage knockoutslocated in rear of control panel.3. Run low voltage conduit through 7/8 bushing locatedin conduit entrance plate and secure to low voltageopening in rear of control panel.4. Run high voltage conduit through 1-3/4 bushinglocated in conduit entrance plate and secure to highvoltage opening in rear of control panel.5. Replace conduit access panel if required to completeinstallation.6. Seal around conduit in conduit entrance plate.WARNINGFailure to provide a proper electrical groundcould result in electric shock or fire.15. WIRING – MAIN POWERRefer to unit rating plate for wire sizing informationand maximum fuse or “HACR” type circuit breakersize. Each outdoor unit is marked with a “MinimumCircuit Ampacity”. This means that the field wiringused must be sized to carry that amount of current. Allmodels are suitable only for connection with copperwire. Each unit and/or wiring diagram will be marked -“Use Copper Conductors Only”. These instructionsmust be adhered to. Refer to the National ElectricalCode (NEC) for complete current carrying capacitydata on the various insulation grades of wiring material.All wiring must conform to NEC and all local codes.The electrical data lists fuse and wire sizes (75° Ccopper) for all models.The unit rating plate lists a “Maximum Time DelayRelay Fuse” or “HACR” type circuit breaker that is tobe used with the equipment. The correct size must beused for proper circuit protection and also to assure thatthere will be no nuisance tripping due to the momentaryhigh starting current of the compressor motor.The disconnect access door on this unit may be lockedto prevent unauthorized access to the disconnect. Toconvert for the locking capability bend the tab locatedin the bottom left hand corner of the disconnect openingunder the disconnect access panel straight out. This tabwill now line up with the slot in the door. When shut, apadlock may be placed through the hole in the tabpreventing entry.See “Start Up” section for important information onthree phase scroll compressor start ups.WARNINGFor your personal safety, turn off electricpower at service entrance panel beforemaking any electrical connections. Failure todo so could result in electric shock or fire.WARNINGFailure to provide an electrical power supplyshut off means could result in electric shockor fire.