Honeywell SDC User Manual
Page 10
Safety instructions
SDC / DHC
10 EN2H-0220GE51
R0308
2.4 Connection of accessory parts
WARNING
According to VDE 0730, a separator for each mains terminal
is to be provided in the voltage supply to the control
equipment. Observe the local regulations regarding
grounding and zeroing.
As soon as the mains voltage is applied to terminals 21, 22,
2, 6, 12 and 18, headers X3 and X4 can also carry mains
voltage.
If the heating circuit and hot-water loading pumps do not
have an On / Off switch, but manual switch-on and switch-off
capability is still desired, the appropriate switches must be
installed by the customer. All accessory parts (sensors,
selectors etc.) are to be connected to the respective circuit
diagram.
2.5 Maintenance and cleaning
The controller is maintenance-free. The device can be cleaned
externally with a moist (not wet) cloth.
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