Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!floyd!harpo!eagle!hou5h!hou5a!hou5d!hogpc!houxb!hrs From: hrs@houxb.UUCP (H.SILBIGER) Newsgroups: net.misc,net.physics Subject: Re: Why don"t thermostats work? Message-ID: <257@houxb.UUCP> Date: Fri, 17-Feb-84 09:03:57 EST Article-I.D.: houxb.257 Posted: Fri Feb 17 09:03:57 1984 Date-Received: Sat, 18-Feb-84 01:45:11 EST References: <877@ihuxl.UUCP>, <194@heurikon.UUCP>, <164@cubsvax.UUCP> heurikon.199 Lines: 19 The new Sears solid state programmable thermostat indeed looks at the rate of change in the room temperature to help maintain a setpoint. It therefore is capable of holding the house temperature quite steady. This could potentially cause problems on the air-conditioning mode, since the compressor of a house airconditioner should not cycle too often (most of them have a built in delay relay). In the airconditioning mode the thermostat has a programmed in delay of 4 min. It is also possible to get osciillation in the heating mode. If this happens the user can program in a delay there as well. The time program allows for four temperature changes per day, on a 2 and 5 day series basis (weekday and weekend). There is also an override for the current time period and for all time periods. A nice package, especially when on sale in the mail order flyer at $ 70.0 Herman Silbiger AT&T-IS Lincroft