[net.physics] Why don"t thermostats work?

hrs@houxb.UUCP (H.SILBIGER) (02/17/84)

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