Honeywell CT3300 warranty Five wires connected to the old thermostat

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Five wires connected to the old thermostat

Your new thermostat has a factory-installed metal jumper between the R and Rc terminals (Fig. 15). Remove the jumper before wiring the R and Rc terminals.

JUMPER (FACTORY-	Fig. 15
INSTALLED). REMOVE	Fig. 15
IF 5-WIRE SYSTEM

c		R
R		R
G	Y	W	M20127

Old thermostat terminals that do not match new thermostat terminals

Use the table below to wire the new thermostat.

	Old thermostat	Connect to new
	terminal	thermostat terminal	Description

	R, RH, 4, V	R*	Power

	Rc, R	Rc*	Power for cooling

	W, W1, H	W	Heat
	Y, Y1, M	Y	Cooling
	G, F	G	Fan

	O	Do not continue	Changeover in cool (O terminal) or changeover in heat (B terminal).
		installation	You have a single stage heat pump or zoning system. See page 2 for an
	B	installation
	B		alternate thermostat model.
			alternate thermostat model.

	C, X, B	Do not connect	Transformer common.

	W2, H2	Do not continue	Second stage heat (W2, H2) or second stage cooling (Y2).
		installation.	You have a multistage heating/cooling system. See page 2 for an alternate
	Y2	installation.
	Y2		thermostat model.
			thermostat model.

*Remove factory-installed jumper between R and Rc terminals in 5-wire systems.

10 INSTALLATION

69-0654-5

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Contents Installation and Programming Instructions Table of ContentsVerify that you have the right thermostat InstallationRecycling thermostat Prepare for installation Required tools and supplies Optional toolsRemove the old thermostat Check your progressInstall the mounting plate Fuel Switch Set the thermostat for your type of heating systemType of system Screws a and B Fuel switch Wire the thermostat terminalsHeating system table Install the batteries Mount the thermostatThree thermostat wires Special wiring instructionsSix or more wires Wires that are not connected to the old thermostatFive wires connected to the old thermostat Faceplate illustration and descriptions ProgrammingDescriptions Learn about the programming features Set the current time and dayProgram period Description When available Programming tipsHeating Program Program the heating scheduleSchedule Period Program the cooling schedule Cooling ProgramVerify that your heating system works Check out the systemVerify that your cooling system works Operation Set the Fan and System switchesSetting Result Change the clock for Daylight/Standard TimeReplace the batteries Switch Setting ResultIf you see Batteries are You should Change the temperature temporarily Override the program settingsHold a temperature indefinitely Cancel a program Check the current programmed temperatureCheck programs Check how long heat/air conditioning has been running Reset the cumulative usage counter to zeroChange a program permanently Frequently asked questions ThenCustomer assistance Limited 1-year warranty Home and Building Control