Williams 2903512, 2903511 installation instructions Programmable Timer, Overview

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Programmable Timer

The programmable timer allows precise operating and timing control and is standard on this furnace. (Figure 10)

Overview

The programmable timer has the following features:

•Long life lithium battery

•Daily and weekly programs

•One minute minimum switching time

•Quick progression

•Sixteen programs (8 on and 8 off)

•Days of the week and hours of the day selection

• Programmable day blocks:	1-2-3-4-5	(Monday – Friday)
	1-2-3-4-5-6	(Monday – Saturday)
	1-2-3-4-5-6-7	(Monday – Sunday)
	6-7	(Saturday – Sunday)

Figure 10

KEY

AOn/Off Switch

BSetting / Regulator Switch

CProgram Selection

DDay Selection

EHours Setting

FMinutes Setting

GSKIP Button

R	Reset Button

Pos. I	The appliance is controlled by the room thermostat
Pos. AUTO	The appliance is controlled by both the timer and the room thermostat
Pos. O	The appliance is turned off
Pos.	Time setting
Pos. RUN	Normal operating mode (the display shows the current time)
Pos.	Setting of programming

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Contents Direct-Vent Wall Furnace General Information and Technical Data Table of ContentsLP Gas Warning Odor Safety Rules and General WarningsSafety Information for Users of LP Gas Some Points to Remember Technical DataWall Installation InstallationPage Outside Location for Vent Terminal Ring Gasket Gas Type Nozzle Part Number Gas ConversionsNozzle Diameter Minimum Manifold Gas PressurePressure Testing of the Gas Supply System Installing a New Main Gas Shutoff ValveGas Supply High Altitudes U.S. OnlyChecking the Gas Manifold Pressure First Firing of the FurnaceChecking the Gas Inlet Pressure Electrical Wiring Operating Instructions For Your Safety Read Before OperatingWhat to do if the RED Lamp is LIT Servicing Checking and Adjusting the Gas Manifold PressureLubrication of Moving Parts Flame Visual CheckAnnual Maintenance Requirements Overview Programmable TimerDay and Time Setting Setting and Adjustment Initial ConditionsProgramming the Timer Manual OperationCancelling of all Preset Programs Cancelling a Single ProgramUsing the Skip Function Skip Function Procedure During OperationStarting Sequence Electrical TroubleshootingTroubleshooting Step Starting Sequence Gas Gas Assembly Replacement PartsJMTR018