Carrier 50HCQ12 Installation Instructions Manual

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16Unit without Thru--Base Connection Kit —Pass the thermostat control wires through the bushing onthe unit end panel. Route the wire through the snap--inwire tie and up to the web bushing near the control box.Route the wire through the bushing and into the bottomleft side of the control box after removing one of the twoknockouts in the corner of the box. Using a connector atthe control box to protect the wire as it passes into thecontrol box. Pull the wires over to the terminal strip at theupper left corner of the Central Terminal Board (CTB).Use the connector at the control box and the wire tie toensure that the thermostat wire is tight and will not bedamaged by contact with the condenser coil. See Fig. 28.NOTE: If thru--the--bottom connections accessory isused, refer to the accessory installation instructions forinformation on routing power and control wiring.Heat Anticipator Settings —Set heat anticipator settings at 0.14 amp for the first stageand 0.14 amp for second--stage heating, when available.C10018Fig. 28 -- Thermostat Wire RoutingElectric Heaters50HCQ units may be equipped with field--installedaccessory electric heaters. The heaters are modular indesign, with heater frames holding open coil resistancewires strung through ceramic insulators, line--break limitswitches and a control contactor. One or two heatermodules may be used in a unit.Heater modules are installed in the compartment belowthe indoor (supply) fan outlet. Access is through theindoor access panel. Heater modules slide into thecompartment on tracks along the bottom of the heateropening. See Fig. 29.UNIT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage.Not all available heater modules and single pointboxes may be used in every unit. Use only thoseheater modules that are UL listed for use in a specificsize unit. Refer to the label on the unit cabinet for thelist of approved heaters and single point boxes.CAUTION!50HCQD12