... the backup electric heating element are simple rectifer-zener diode regulator circuits run from the 24 Vac manual readout running time meters. ... times for the solar circulator and backup electric heating element are monitored continuously by a Motorola 6800 based microcomputer [4, 5]. ... The entire instrumentation package cost about S3000, with $1000 of that going for the optional floppy disk system.
|Title||:||Solar heating and cooling systems operational results, NOvember 27-30, 1979|