Carrier 50TCQA04 Installation Instructions Manual

Also see for WeatherMaker 50TCQA07: Installation instructions Installation instructions Service and maintenance instructions

18Units with Factory--Installed Non--Fused Disconnect —The factory--installed option non--fused disconnect (NFD)switch is located in a weatherproof enclosure locatedunder the main control box. The manual switch handle andshaft are shipped in the disconnect enclosure. Assemble theshaft and handle to the switch at this point. Discard thefactory test leads (see Fig. 18).Connect field power supply conductors to LINE sideterminals when the switch enclosure cover is removed toattach the handle.C12284Fig. 22 -- Location of Non--Fused Disconnect EnclosureTo field install the NFD shaft and handle:1. Remove the unit front panel (see Fig. 2).2. Remove (3) hex screws on the NFD enclosure -- (2) onthe face of the cover and (1) on the left side cover.3. Remove the front cover of the NFD enclosure.4. Make sure the NFD shipped from the factory is atOFF position (the arrow on the black handle knob isat OFF).5. Insert the shaft with the cross pin on the top of the shaftin the horizontal position.6. Measure from the tip of the shaft to the top surface ofthe black pointer; the measurement should be 3.75 to3.88 in. (95 to 99 mm).7. Tighten the locking screw to secure the shaft to theNFD.8. Turn the handle to the OFF position with red arrowpointing at OFF.9. Install the handle on to the painted cover horizontallywith the red arrow pointing to the left.10. Secure the handle to the painted cover with (2) screwsand lock washers supplied.11. Engaging the shaft into the handle socket, re--install(3) hex screws on the NFD enclosure.12. Re--install the unit front panel.Units Without Factory--InstalledNon--Fused Disconnect —When installing units, provide a disconnect switch perNEC (National Electrical Code) of adequate size.Disconnect sizing data is provided on the unit informativeplate. Locate on unit cabinet or within sight of the unit pernational or local codes. Do not cover unit informativeplate if mounting the disconnect on the unit cabinet.C12279Fig. 23 -- Handle and Shaft Assembly for NFDAll Units —All field wiring must comply with NEC and all local codes.Size wire based on MCA (Minimum Circuit Amps) on theunit informative plate. See Fig. 18 and the unit labeldiagram for power wiring connections to the unit powerterminal blocks and equipment ground. Maximum wire sizeis #2 ga AWG (copper only) per pole on contactors.Provide a ground--fault and short--circuit over--currentprotection device (fuse or breaker) per NEC Article 440(or local codes). Refer to unit informative data plate forMOCP (Maximum Over--current Protection) device size.All field wiring must comply with the NEC and localrequirements.All units except 208/230-v units are factory wired for thevoltage shown on the nameplate. If the 208/230-v unit is tobe connected to a 208-v power supply, the controltransformer must be rewired by moving the black wire withthe 1/4 -in. female spade connector from the 230--vconnection and moving it to the 200-v 1/4 -in. male terminalon the primary side of the transformer. Refer to unit labeldiagram for additional information. Field power wires willbe connected line--side pressure lugs on the power terminalblock or at factory--installed option non--fused disconnect.NOTE: Check all factory and field electrical connectionsfor tightness.Convenience Outlets —ELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Units with convenience outlet circuits may usemultiple disconnects. Check convenience outlet forpower status before opening unit for service. Locateits disconnect switch, if appropriate, and open it.Lock--out and tag--out this switch, if necessary.! WARNINGTwo types of convenience outlets are offered: Non--poweredand unit--powered. Both types provide a 125--volt GFCI(ground--fault circuit--interrupter) duplex receptacle rated at15--A behind a hinged waterproof access cover, located onthe end panel of the unit. See Fig. 24.