Carrier 39L Series Installation, Operation, And Start-up Instructions

Also see for 39L Series: Installation, Start-Up and Service Instructions

Carrier 39L Series Installation, Operation, And Start-up Instructions Manual pdf 2 page image

IMPORTANT: This equipment generates, uses, and canradiate radio frequency energy and if not installed andused in accordance with these instructions may causeradio interference. It has been tested and found to com-ply with the limits of a Class A computing device asdefined by FCC regulations, Subpart J of Part 15, whichare designed to provide reasonable protection againstsuch interference when operated in a commercialenvironment.SAFETY CONSIDERATIONSInstallation and start-up of air-conditioning equipment canbe hazardous due to system pressure and electrical compo-nents. Only trained and qualified service personnel shouldinstall, start up, or service air-conditioning equipment.When working on air-conditioning equipment, observe pre-cautions in the literature, tags and labels attached to the unit,and other safety precautions that may apply.Follow all safety codes, including ANSI (AmericanNational Standards Institute) Z223.1 (latest version). Wearsafety glasses and work gloves.Disconnect all power to the unit before performing main-tenance or service. Unit may automatically start if poweris not disconnected. Electrical shock and personal in-jury could result.Do not store or use gasoline or other flammable vaporsand liquids in the vicinity of this or any otherappliance.GENERALThe Product Integrated Control (PIC) option is availablefor 39L and 39NX indoor units with a draw-thru configu-ration. The PIC control box can be supplied as part of a dedi-cated PIC section; it is factory-installed and wired and hasthe same hand (orientation) as the fan section. The controlbox can also be shipped separately for remote mounting with-out a PIC section. For the remote control box option, all con-nections from the control box to the unit are made to a junc-tion box in the unit’s fan section.The control box includes electronic modules, fuses, re-lays, transformers, terminal blocks, low-limit air tempera-ture protection (optional), static pressure transducer (VAV[Variable Air Volume] units only) and high-pressure switch(VAV units). An ON/OFF switch is included to shut off thepower to the control box.PIC environmental limitations are as follows:Shipping Temperature — −20 to 165 FShipping Humidity — 10 to 95%Operating Temperature — 32 to 125 FOperating Humidity — 30 to 90%INSTALLATIONFollow all basic installation instructions for 39L or 39NXunits as described in the 39L or 39NX Installation, Start-Up,and Service Instructions shipped with the unit. To verify thePIC and PIC option configurations according to the modelnumbers, see Fig. 1 and 2.Leave protective coverings on the unit until it is installedinside and protected from the elements, construction debris,and dirt.Use one of the keys provided in the 39L or 39NX instal-lation packet (located in fan section) to open the control boxdoor. Visually inspect all components and wiring for any dam-age. Remove the valve assembly packages and the sensorpackages from the fan section. For units with PIC sections,remove protective plastic caps from the bulkhead fittings(located on the top edge of the control box) and discard.Verify that the 10.0 amp ON/OFF switch located on thePIC control box door is in the OFF position. Do not turn thepower supply on at this time.NOTE: The 39NX and 39L air handlers are designed for in-door applications. Modified units are available for outdoorapplications on pier or slab mounts (not curb mounts). Prod-uct integrated controls are not available for outdoor appli-cations. Consult your Carrier sales representative for furtherdetails.Service Area Requirements — Article 110-16 of theNEC (National Electrical Code) describes electrical instal-lation. All 39L and 39NX PIC installations must comply withthe minimum clearances required for electrical installationas listed in Table 110-16(a) of the code. Make sure to pro-vide the necessary clearance from the PIC unit to any ad-joining wall. Refer to the base unit installation instructionsfor detailed dimensions for each unit section.Remote Control Box Option — This option allowsthe PIC control box to be mounted away from the unit; theremote control box (Fig. 3) must be wired to the supply fansection. Mount the remote control box assembly to themechanical room wall near the unit using field-suppliedUnistrutt metal framing or equivalent supports. The controlbox has 4 mounting holes in the back of the enclosure forthis purpose.2