
EDS801/3 page7
Boiler control panel and wiring
Key to figs 6 and 7
EC1
External Energy Control 1(eg timeclock)
L1
On/off indicator lamp
L2
Boiler high limit lock-out lamp (lamp is illuminated when
running and goes out in lock-out condition)
L3
Stage 1 run lamp
L4
Stage 2 run lamp
STB
High limit thermostat (factory set)
TR
Boiler thermostat (1-stage for CKCR1 or dual operation [TR
and TR2] for CKCR2)