Carrier WeatherMaster Series Installation Instructions Manual

Also see for 50HC Series: Service and maintenance instructions Installation instructions

21TypicalThermostatConnectionsCentralTerminalBoardW1Y2Y1RW2GCXW1Y2Y1RW2GCXT–STATCW2GW1O/B/Y2RY1(Note 1)Note 1: Typical multi-function marking. Follow manufacturer’s configurationinstructions to select Y2.Note 2: W2 connection not required on units with single-stage heating.Field Wiring(Note 2)C09351Fig. 27 -- Typical Low--Voltage Control ConnectionsCentral Terminal Board —The Central Terminal Board (CTB) is a pass throughconnection point. The CTB provides the capability to addfactory--installed options and field--installed accessories tothe units by cutting jumper wires without having to changeor reroute wires through the structure of the unit. The CTBdoes not provide any microprocessor control; it is simply abasic multifunction wiring terminal configuration.Unit without Thru--Base Connection Kit —Pass the thermostat control wires through the hole providedin the end panel (see item “D” in the view labeled “LEFT”in Fig. 2 and Fig. 3) then feed the wires through the racewaybuilt into the corner post to the control box. Pull the wiresover to the terminal strip on the upper--left corner of theCentral Terminal Board (CTB) 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.Electric Heaters50HC units may be equipped with factory or field--installedelectric heaters. The heaters are modular in design, withheater frames holding open coil resistance wires strungthrough ceramic insulators, limit switches and one or twocontrol contactors. One or two heater modules may be usedin a unit.RACEWAYHOLE IN END PANEL (HIDDEN)C08027Fig. 28 -- Field Control Wiring RacewayHeater 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 -- 31.Not all available heater modules may be used in everyunit. Use only those heater modules that are UL listed foruse in a specific size unit. Refer to the label on the unitcabinet for the list of approved heaters.Unit heaters are marked with Heater Model Numbers, butheaters are ordered as and shipped in cartons marked witha corresponding heater Sales Package part number. SeeTable 2 for correlation between Heater Model Numberand Sales Package part number.NOTE: The value in position 9 of the part number differsbetween the sales package part number (value is 1) and abare heater model number (value is 0).DISCONNECT MOUNTINGLOCATIONUNIT BLOCK-OFFPANELOUTDOORACCESS PANELINDOORACCESSPANELC08133Fig. 29 -- Typical Access Panel LocationTable 2 – Heater Model NumberBare Heater Model Number C R H E A T E R 0 0 1 A/B 0 0Heater Sales Package P/NIncludes:Bare HeaterCarton and packing materialsInstallation sheetC R H E A T E R 1 0 1 A/B 0 0